simple API explorer tool

.gitignore

@@ -21,5 +21,3 @@ src/client/sparkcmd/Properties/launchSettings.json
 node_modules
 paket-files
 project.lock.json
-src/server/sparkd/orderman/perf_analysis/data
-src/server/sparkd/orderman/perf_analysis/trace_data/

src/client/Directory.Build.Targets

@@ -39,7 +39,6 @@
 
     <Message Importance="High" Text="Generating service %(Proto3.FileName)" />
     <Exec Command="
-       set PATH=$(spark_build_python_path);%path% &amp;
        set PYTHONPATH=$(Externals)\python &amp;
        $(protoc) ^
        %(Proto3.FullPath) ^

src/client/spark/Daemons/AboutDaemon.cs

@@ -25,7 +25,7 @@ namespace bts.ui {
       public AboutDaemon(IBus bus, [Import("username")]string username, IBrowserWindowManager browser) {
          _user = username;
          _browser = browser;
-         _dispose = bus.subscribe(SparkTags.About).OnDispatcher().Subscribe(_ => show_about());
+         _dispose = bus.subscribe(SparkTags.About).ObserveOnDispatcher().Subscribe(_ => show_about());
       }
 
       [Conditional("DEBUG")]

src/client/spark/Daemons/DeleteSyntheticDaemon.cs

@@ -18,7 +18,7 @@ namespace bts {
       public DeleteSyntheticDaemon(IBus bus, OrdersModel orders_model) {
          _orders_model = orders_model;
          _dispose = bus.subscribe(SparkTags.SyntheticDeleteTag)
-            .OnDispatcher()
+            .ObserveOnDispatcher()
             .Subscribe(_delete_synthetic);
       }
 

src/client/spark/Daemons/ErrorReporter.cs

@@ -7,7 +7,7 @@ using mbts.ui;
 using System;
 using System.ComponentModel.Composition;
 using System.Reactive.Linq;
-using System.Windows.Threading;
+using System.Threading.Tasks;
 using System.Windows;
 
 namespace bts.spark
@@ -22,21 +22,18 @@ namespace bts.spark
       public ErrorReporter(ErrorReportService svc, IBus bus, [Import("username")] string username) {
          _svc = svc;
          _username = username;
-         _dispose = bus.subscribe(SparkTags.Support).OnDispatcher().Subscribe(msg => show_support_window(msg, "Report a problem"));
+         _dispose = bus.subscribe(SparkTags.Support).ObserveOnDispatcher().Subscribe(msg => show_support_window(msg, "Report a problem"));
       }
 
       public void Dispose() {
          Disposable.dispose(ref _dispose);
       }
 
-      public void report_error(string message, string title = null, MessageBoxImage? image = null) {
-         // Error reports are likely to arrive the api thread (which is not an STA thread)
-         Application.Current.Dispatcher.BeginInvoke(async () => {
-            var result = await BTSMessageBox.ShowAsync(message, title = "Error", BTSMessageBoxButtons.OK | BTSMessageBoxButtons.Support, image ?? MessageBoxImage.Error);
-            if (result == BTSMessageBoxButtons.Support) {
-               show_support_window(message, title);
-            }
-         });
+      public async Task report_error(string message, string title = null, MessageBoxImage? image = null) {
+         var result = await BTSMessageBox.ShowAsync(message, title = "Error", BTSMessageBoxButtons.OK | BTSMessageBoxButtons.Support, image ?? MessageBoxImage.Error);
+         if (result == BTSMessageBoxButtons.Support) {
+            show_support_window(message, title);
+         }
       }
 
       public void show_support_window(string message, string title) {
@@ -73,11 +70,11 @@ namespace bts.spark
                return (get_successful_rv(result.value), string.Empty);
             else {
                string error_msg = template.fmt(error);
-               error_reporter.report_error(error_msg);
+               error_reporter.report_error(error_msg).ignore();
                return (get_unsuccessful_rv(), error_msg);
             }
          } else {
-            error_reporter.report_error(result.error_message);
+            error_reporter.report_error(result.error_message).ignore();
             return (get_unsuccessful_rv(), result.error_message);
          }
       }

src/client/spark/Daemons/OrderTicketDaemon.cs

@@ -28,11 +28,11 @@ namespace bts.shell {
          _model = model;
          _error_reporter = error_reporter;
          _dispose = Disposable.Create(
-            model.on_orders.OnDispatcher().Subscribe(o => _orders = o),
-            bus.subscribe(SparkTags.SecuritiesTag).OnDispatcher().Subscribe(m =>_md_map = m),
-            bus.subscribe(SparkTags.ShowOrderTicketFromSecurityTag).OnDispatcher().Subscribe(_show_order_ticket),
-            bus.subscribe(SparkTags.ShowOrderTicketTag).OnDispatcher().Subscribe(_show_order_ticket),
-            bus.subscribe(SparkTags.ShowModifyOrderTag).OnDispatcher().Subscribe(_show_modify_order)
+            model.on_orders.ObserveOnDispatcher().Subscribe(o => _orders = o),
+            bus.subscribe(SparkTags.SecuritiesTag).ObserveOnDispatcher().Subscribe(m =>_md_map = m),
+            bus.subscribe(SparkTags.ShowOrderTicketFromSecurityTag).ObserveOnDispatcher().Subscribe(_show_order_ticket),
+            bus.subscribe(SparkTags.ShowOrderTicketTag).ObserveOnDispatcher().Subscribe(_show_order_ticket),
+            bus.subscribe(SparkTags.ShowModifyOrderTag).ObserveOnDispatcher().Subscribe(_show_modify_order)
          );
       }
 

src/client/spark/Daemons/SecurityPickerDaemon.cs

@@ -23,10 +23,10 @@ namespace bts {
       public SecurityPickerDaemon(IBus bus) {
          _bus = bus;
          _dispose = Disposable.Create(
-            bus.subscribe(SparkTags.ShowPickOne).OnDispatcher().Subscribe(show_pick_one),
-            bus.subscribe(SparkTags.FilterPickOne).OnDispatcher().Subscribe(show_filtered_pick_one),
-            bus.subscribe(SparkTags.ShowPickMultiple).OnDispatcher().Subscribe(show_pick_multiple),
-            bus.subscribe(SparkTags.ShowAndEditPickMultiple).OnDispatcher().Subscribe(show_and_edit_pick_multiple)
+            bus.subscribe(SparkTags.ShowPickOne).ObserveOnDispatcher().Subscribe(show_pick_one),
+            bus.subscribe(SparkTags.FilterPickOne).ObserveOnDispatcher().Subscribe(show_filtered_pick_one),
+            bus.subscribe(SparkTags.ShowPickMultiple).ObserveOnDispatcher().Subscribe(show_pick_multiple),
+            bus.subscribe(SparkTags.ShowAndEditPickMultiple).ObserveOnDispatcher().Subscribe(show_and_edit_pick_multiple)
          );
       }
 

src/client/spark/Images/Icons.cs

@@ -47,7 +47,7 @@ namespace mbts.ui
       //public static ImageSource Ticket { get { return load_image("Ticket.png"); } } // replaced with AddOrders
       public static ImageSource Date { get { return load_image("Date.png"); } }
 
-      public static ImageSource Cube3d { get { return (DrawingImage)_resources["Cube"]; } }
+      public static ImageSource Cube3d { get { return (DrawingImage)_resources["Cube"];  /*return load_image("Cube-Molecule.png");*/ } }
       public static ImageSource Algo { get { return Cube3d; } }
       public static ImageSource Quote { get { return Math; } }
       public static ImageSource Math { get { return (DrawingImage)_resources["Surface"]; } }
@@ -62,7 +62,9 @@ namespace mbts.ui
 #pragma warning restore CS0618
 
       // Vector icons
-      public static ImageSource Bookmarks { get { return (DrawingImage)_resources["Bookmarks"]; } }
+      public static ImageSource Favorites { get { return Favorites_Gold; } }
+      public static ImageSource Favorites_Gold { get { return (DrawingImage)_resources["FavoritesGold"]; } }
+      public static ImageSource Favorites_White { get { return (DrawingImage)_resources["FavoritesWhite"]; } }
       public static ImageSource Window { get { return (DrawingImage)_resources["Window"]; } }
       public static ImageSource ActiveWindow { get { return (DrawingImage)_resources["ActiveWindow"]; } }
       public static ImageSource Trash { get { return (DrawingImage)_resources["Trash"]; } }

src/client/spark/Images/Vector/Icons.xaml

@@ -3,17 +3,33 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
              xmlns:mbts="clr-namespace:mbts.ui">
-
-  <DrawingImage x:Key="Bookmarks">
+  <DrawingImage x:Key="FavoritesGold">
     <DrawingImage.Drawing>
       <DrawingGroup>
         <DrawingGroup.Children>
           <GeometryDrawing Geometry="M1540.22,2082.07L1546.95,2102.78 1568.73,2102.78 1551.11,2115.58 1557.84,2136.29 1540.22,2123.49 1522.6,2136.29 1529.33,2115.58 1511.71,2102.78 1533.49,2102.78 1540.22,2082.07z">
             <GeometryDrawing.Pen>
-              <Pen Thickness="3" Brush="Black" />
+              <Pen Thickness="1" Brush="Black" />
             </GeometryDrawing.Pen>
             <GeometryDrawing.Brush>
-              <SolidColorBrush Color="Transparent" />
+              <SolidColorBrush Color="#ffd932" />
+            </GeometryDrawing.Brush>
+          </GeometryDrawing>
+        </DrawingGroup.Children>
+      </DrawingGroup>
+    </DrawingImage.Drawing>
+  </DrawingImage>
+
+  <DrawingImage x:Key="FavoritesWhite">
+    <DrawingImage.Drawing>
+      <DrawingGroup>
+        <DrawingGroup.Children>
+          <GeometryDrawing Geometry="M1540.22,2082.07L1546.95,2102.78 1568.73,2102.78 1551.11,2115.58 1557.84,2136.29 1540.22,2123.49 1522.6,2136.29 1529.33,2115.58 1511.71,2102.78 1533.49,2102.78 1540.22,2082.07z">
+            <GeometryDrawing.Pen>
+              <Pen Thickness="1" Brush="Black" />
+            </GeometryDrawing.Pen>
+            <GeometryDrawing.Brush>
+              <SolidColorBrush Color="#ffd932" />
             </GeometryDrawing.Brush>
           </GeometryDrawing>
         </DrawingGroup.Children>

src/client/spark/Modules/Bookmarks/BookmarkShellModule.cs

@@ -1,81 +0,0 @@
-using bts.spark;
-using mbts.spark;
-using mbts.ui;
-using mbts.ui.settings;
-using mbts.ui.shell;
-using System;
-using System.Collections.Generic;
-using System.ComponentModel.Composition;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Media;
-
-namespace bts.ui {
-   [Export(typeof(IShellModule))]
-   public class BookmarkShellModule : ILazyMenuModule {
-      readonly WindowManager _wm;
-      readonly IBookmarks _bookmarks;
-      readonly ISavedWindowFactory _window_factory;
-      readonly WorkspacesModel _workspaces;
-
-      [ImportingConstructor]
-      public BookmarkShellModule(
-         WorkspacesModel workspaces, 
-         WindowManager wm, 
-         IBookmarks bm,
-         ISavedWindowFactory swf) {
-         _workspaces = workspaces;
-         _wm = wm;
-         _bookmarks = bm;
-         _window_factory = swf;
-      }
-
-      public ImageSource icon => Icons.Bookmarks;
-
-      public string name => "My Windows";
-
-      public int priority => 35;
-
-      public IEnumerable<SparkCommand> actions {
-         get {
-            // The windows that are open
-            var open =
-               _wm.list_documents()
-               .Select(td => td.ViewModel)
-               .Where(vm => vm.HasCustomTitle)
-               .Select(vm =>
-                  SparkCommand.create(vm.Title, vm.Icon, SparkTags.ActivateWindow, () => vm.Model))
-               .Cast<SparkCommand>();
-
-            var open_set = new HashSet<string>(open.Select(c => c.title));
-
-            // The windows that are not open
-            var closed =
-               _bookmarks.bookmarks
-               .Where(state => !open_set.Contains(state.title))
-               .Select(state =>
-                  SparkCommand.create(state.title, Icons.Bookmarks, SparkTags.ShowWindowAsync,
-                     () => {
-                        _bookmarks.remove(state);
-                        return _window_factory.restore(state);
-                     }))
-               .Cast<SparkCommand>();
-
-            // todo: The windows that are closed
-            foreach (var w in open.Concat(closed).OrderBy(w => w.title)) {
-               yield return w;
-            }
-         }
-      }
-
-      public Task<IShellWindow> create(Stream load_stream) {
-         // This module shouldn't have any windows
-         throw new NotImplementedException();
-      }
-
-      public void Dispose() { }
-
-   }
-}

src/client/spark/Modules/Bookmarks/BookmarksModel.cs

@@ -1,48 +0,0 @@
-using mbts.ui.settings;
-using System;
-using System.Collections.Generic;
-using System.ComponentModel.Composition;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace mbts.ui.shell {
-
-   public interface IBookmarks {
-      void save_bookmark(IShellWindow window);
-      void save_bookmark(WindowState window);
-      void remove(WindowState window);
-      void clear();
-      IEnumerable<WindowState> bookmarks { get; }
-   }
-
-   [Export(typeof(IBookmarks))]
-   public class BookmarksModel : IBookmarks {
-      readonly ISettingsCollector _settings_collector;
-      readonly Dictionary<string, WindowState> _bookmarks = new Dictionary<string, WindowState>();
-
-      [ImportingConstructor]
-      public BookmarksModel(ISettingsCollector settings) {
-         _settings_collector = settings;
-      }
-      public void save_bookmark(IShellWindow window) {
-         var state = _settings_collector.get_window_state(window);
-         if (state != null) {
-            _bookmarks[state.title] = state;
-         }
-      }
-      public void save_bookmark(WindowState window) {
-         _bookmarks[window.title] = window;
-      }
-
-      public void clear() {
-         _bookmarks.Clear();
-      }
-
-      public void remove(WindowState window) {
-         _bookmarks.Remove(window.title);
-      }
-
-      public IEnumerable<WindowState> bookmarks => _bookmarks.Values;
-   }
-}

src/client/spark/Modules/Market/MarketView/MarketViewRow.cs

@@ -78,11 +78,11 @@ namespace mbts.spark {
             _animation.AnimationsChanged += on_animations_changed;
             void on_animations_changed() => RaisePropertyChanged(nameof(animations));
             _dispose = Disposable.Create(
-               _orders_model.on_security_orders(security.Id).OnDispatcher().Subscribe(_on_orders),
-               _position.OnDispatcher().Subscribe(v => _animation.animate_position(v.newval > v.oldval)),
-               _inside_bids.OnDispatcher().Subscribe(v => _animation.animate_working_bids_inside(v.newval)),
-               _inside_asks.OnDispatcher().Subscribe(v => _animation.animate_working_asks_inside(v.newval)),
-               _day_change.OnDispatcher().Subscribe(v => _animation.animate_day_change(v.newval > v.oldval)),
+               _orders_model.on_security_orders(security.Id).ObserveOnDispatcher().Subscribe(_on_orders),
+               _position.ObserveOnDispatcher().Subscribe(v => _animation.animate_position(v.newval > v.oldval)),
+               _inside_bids.ObserveOnDispatcher().Subscribe(v => _animation.animate_working_bids_inside(v.newval)),
+               _inside_asks.ObserveOnDispatcher().Subscribe(v => _animation.animate_working_asks_inside(v.newval)),
+               _day_change.ObserveOnDispatcher().Subscribe(v => _animation.animate_day_change(v.newval > v.oldval)),
                Disposable.Create(() => _animation.AnimationsChanged -= on_animations_changed)
             );
          }

src/client/spark/Modules/Market/MarketView/MarketViewVM.cs

@@ -81,7 +81,7 @@ namespace mbts.spark {
          }
          //
          _resources.AddRange(
-            state.OnDispatcher().Subscribe(s => {
+            state.ObserveOnDispatcher().Subscribe(s => {
                using (rows_view.DeferRefresh()) {
                   rows_view.SetSortingCriteria(s.sorting_criteria);
                   var filters = s.filters;

src/client/spark/Modules/Market/MarketView/MarketViewWindow.cs

@@ -57,7 +57,7 @@ namespace mbts.spark {
             SparkCommands.ShowTimeAndSales.complete(_vm.selected_securities_observable(), _ => true, secs => secs.Count > 0 ? new SecurityCriteria(secs) : _state.security_criteria),
             SparkCommands.ShowSyntheticCreate.complete(_vm.selected_securities_observable(), secs => secs.Count > 0 && secs.Count < 3, secs => new SecurityCriteria(secs))
          };
-         _subscriptions = _bus.subscribe(update_securities_tag).OnDispatcher().Subscribe(c =>
+         _subscriptions = _bus.subscribe(update_securities_tag).ObserveOnDispatcher().Subscribe(c =>
             _state_changed?.Invoke(_state = new MarketViewWindowFactory.StartupData(c, _vm.rows_view.GetSortingCriteria(), _vm.get_filter_states())));
       }
 

src/client/spark/Modules/Market/MarketView/MarketViewWindowFactory.cs

@@ -16,7 +16,7 @@ namespace bts.shell {
       public MarketViewWindowFactory(MarketShellModule module, IBus bus, OrdersModel orders_model) : base(module, "MarketView") {
          _bus = bus;
          _orders_model = orders_model;
-         _dispose = bus.subscribe(SparkTags.ShowMarketViewTag).OnDispatcher().Subscribe(_show);
+         _dispose = bus.subscribe(SparkTags.ShowMarketViewTag).ObserveOnDispatcher().Subscribe(_show);
       }
 
       public override Task<IShellWindow> load(StartupData state) =>

src/client/spark/Modules/Market/TimeAndSales/TimeAndSalesWindow.cs

@@ -47,8 +47,8 @@ namespace mbts.spark {
          _vm = new SingleValuePump<TimeAndSalesVM>();
          var update_securities_tag = new SparkTags.SparkTag<SecurityCriteria>("TimeAndSales Callback");
          var update_securities_cmd = SparkCommand.create("Update Time and Sales", Icon, update_securities_tag);
-         var current_smd_source = _vm.observable.SelectMany(vm => vm.current_security_md_observable(_bus)).OnDispatcher();
-         var selected_secs_source = _vm.observable.SelectMany(vm => vm.selected_securities_observable()).OnDispatcher();
+         var current_smd_source = _vm.observable.SelectMany(vm => vm.current_security_md_observable(_bus)).ObserveOnDispatcher();
+         var selected_secs_source = _vm.observable.SelectMany(vm => vm.selected_securities_observable()).ObserveOnDispatcher();
          _commands = new SparkCommand[] {
             SparkCommand.create("Change Securities", Icons.Admin, SparkTags.ShowAndEditPickMultiple, () => (update_securities_cmd, _state.security_criteria)),
             SparkCommands.ShowLadder.complete(current_smd_source, md => md.HasValue, ObjectHelper.ValueOrDefault),
@@ -56,7 +56,7 @@ namespace mbts.spark {
             SparkCommands.ShowFills.complete(selected_secs_source, always_true, get_fills_startup_data),
             SparkCommands.ShowMarketView.complete(selected_secs_source, always_true, secs => secs.Count > 0 ? new SecurityCriteria(secs) : _state.security_criteria)
          };
-         _subscriptions = _bus.subscribe(update_securities_tag).OnDispatcher().Subscribe(update_criteria);
+         _subscriptions = _bus.subscribe(update_securities_tag).ObserveOnDispatcher().Subscribe(update_criteria);
          _initialize();
 
          bool always_true<T>(T _) => true;

src/client/spark/Modules/Market/TimeAndSalesWindowFactory.cs

@@ -23,7 +23,7 @@ namespace bts.shell {
 
          _dispose = Disposable.Create(
             bus.subscribe(SparkTags.SecuritiesTag).Subscribe(s => _securities = s),
-            bus.subscribe(SparkTags.ShowTimeAndSalesTag).OnDispatcher().Subscribe(show)
+            bus.subscribe(SparkTags.ShowTimeAndSalesTag).ObserveOnDispatcher().Subscribe(show)
          );
       }
 

src/client/spark/Modules/Settings/SettingsShellModule.cs

@@ -34,7 +34,7 @@ namespace bts.ui {
 
       public int priority => 40;
 
-      public IEnumerable<SparkCommand> actions => new SparkCommand[]{
+      public IEnumerable<SparkCommand> actions => new []{
          SparkCommands.ShowWorkspaces
          //SparkCommands.ShowSettings
       };

src/client/spark/Modules/Spreader/ExecutionStrategyEditor.xaml

@@ -14,35 +14,35 @@
     <ResourceDictionary Source="/view/Resources/DataTemplates.xaml"/>
     <ResourceDictionary Source="/view/Controls/Popup/PopupControl.xaml"/>
     <ResourceDictionary Source="/Modules/Spreader/ParameterSectionView.xaml"/>
-    <ResourceDictionary Source="/view/Controls/TickFactorsPicker/TickFactorsPicker.xaml"/>
   </ResourceDictionary.MergedDictionaries>
+  <sys:Double x:Key="GroupLevelIndent">18</sys:Double>
   <sys:Double x:Key="RowHeaderWidth">285</sys:Double>
   <sys:Double x:Key="RowHeight">16</sys:Double>
   <sys:Double x:Key="NegativeRowHeight">-16</sys:Double>
   <sys:Double x:Key="ItemsHostCanBeDisabledCollapsedHeight">15</sys:Double>
   <Thickness
     x:Key="GroupLevelMargin"
-    Left="{x:Static usp:ExecutionStrategyEditor.GroupLevelIndent}"
+    Left="{StaticResource GroupLevelIndent}"
   />
   <Thickness
     x:Key="GroupContentAlignedWithHeaderMargin"
-    Left="{x:Static usp:ExecutionStrategyEditor.GroupLevelIndent}"
+    Left="{StaticResource GroupLevelIndent}"
     Top="{StaticResource NegativeRowHeight}"
   />
   <cv:SyntheticPriceCalcDisplayTextConverter x:Key="SyntheticPriceCalcDisplayConverter"/>
   <cv:TickFactorsTextConverter x:Key="TickFactorsTextConverter"/>
   <usp:RowHeaderGroupIndentConverter
     x:Key="RowHeaderGroupIndentConverter"
-    Indent="{x:Static usp:ExecutionStrategyEditor.GroupLevelIndent}"
+    Indent="{StaticResource GroupLevelIndent}"
   />
   <usp:RowHeaderGroupIndentConverter
     x:Key="ReverseRowHeaderGroupIndentConverter"
-    Indent="{x:Static usp:ExecutionStrategyEditor.GroupLevelIndent}"
+    Indent="{StaticResource GroupLevelIndent}"
     Reverse="True"
   />
   <usp:RowGroupExpanderWidthConverter
     x:Key="RowGroupExpanderWidthConverter"
-    Indent="{x:Static usp:ExecutionStrategyEditor.GroupLevelIndent}"
+    Indent="{StaticResource GroupLevelIndent}"
     Offset="{StaticResource RowHeight}"
     RowHeaderWidth="{StaticResource RowHeaderWidth}"
   />
@@ -293,7 +293,7 @@
       </DataTrigger>
     </Style.Triggers>
   </Style>
-  <DataGridTextColumn x:Key="{x:Static usp:ExecutionStrategyEditor.AddColumnPlaceholderKey}" x:Shared="False" IsReadOnly="True">
+  <DataGridTextColumn x:Key="AddColumnPlaceholder" x:Shared="False" IsReadOnly="True">
     <DataGridTextColumn.Header>
       <c:PopupControl
         ShowExpanderArrow="False" PopupPlacement="Right" Header="Add Leg" Padding="6,0"
@@ -308,7 +308,7 @@
       </c:PopupControl>
     </DataGridTextColumn.Header>
   </DataGridTextColumn>
-  <DataTemplate x:Key="{x:Static usp:ExecutionStrategyEditor.RemovableColumnHeaderTemplateKey}">
+  <DataTemplate x:Key="RemovableColumnHeaderTemplate">
     <Grid>
       <Grid.ColumnDefinitions>
         <ColumnDefinition Width="Auto"/>
@@ -321,9 +321,7 @@
       <TextBlock Grid.Column="1" Margin="4,0,0,0" Text="{Binding Converter={StaticResource SecurityTextConverter}}"/>
     </Grid>
   </DataTemplate>
-  <DataTemplate x:Key="{x:Static usp:ExecutionStrategyEditor.NonRemovableColumnHeaderTemplateKey}">
-    <TextBlock Text="{Binding Converter={StaticResource SecurityTextConverter}}"/>
-  </DataTemplate>
+
   <ControlTemplate x:Key="ExecutionStrategyEditorTemplate" TargetType="usp:ExecutionStrategyEditor">
     <Border
       BorderBrush="{TemplateBinding BorderBrush}"
@@ -366,11 +364,20 @@
             Grid.Column="2" VerticalAlignment="Center" Margin="6,0,0,0" Text="Ticks" IsEnabled="{TemplateBinding IsNew}"
             Visibility="{Binding LegTuples.Count, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource IntNotZeroVisibilityConverter}}"
           />
-          <c:TickFactorsPicker
-            x:Name="PART_TickFactorsPicker" Grid.Column="3" Margin="6,0,0,0" IsEnabled="{TemplateBinding IsNew}" HorizontalAlignment="Stretch"
-            SelectedTickFactors="{Binding TickFactors, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
+          <ComboBox
+            x:Name="PART_Tick_ComboBox" Grid.Column="3" Margin="6,0,0,0" IsEnabled="{TemplateBinding IsNew}" HorizontalAlignment="Stretch"
+            ItemsSource="{TemplateBinding AvailableTickFactors}" SelectedItem="{Binding TickFactors, RelativeSource={RelativeSource TemplatedParent}}"
             Visibility="{Binding LegTuples.Count, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource IntNotZeroVisibilityConverter}}"
-          />
+          >
+            <ComboBox.GroupStyle>
+              <GroupStyle ContainerStyle="{StaticResource ComboBox.DelineatedGroupContainerStyle}"/>
+            </ComboBox.GroupStyle>
+            <ComboBox.ItemTemplate>
+              <DataTemplate>
+                <TextBlock Text="{Binding Converter={StaticResource TickFactorsTextConverter}}"/>
+              </DataTemplate>
+            </ComboBox.ItemTemplate>
+          </ComboBox>
           <TextBlock Grid.Column="4" VerticalAlignment="Center" Margin="6,0,0,0">Pricing</TextBlock>
           <ComboBox
             Grid.Column="5" Margin="6,0,0,0" IsEnabled="False"

src/client/spark/Modules/Spreader/ExecutionStrategyEditor.xaml.cs

@@ -25,13 +25,7 @@ namespace mbts.ui.spark {
    /// <summary>
    /// Interaction logic for ExecutionStrategyEditor.xaml
    /// </summary>
-   partial class ExecutionStrategyEditor : Control {
-      public const string
-         RemovableColumnHeaderTemplateKey = "RemovableColumnHeaderTemplate",
-         NonRemovableColumnHeaderTemplateKey = "ReadOnlyColumnHeaderTemplate",
-         AddColumnPlaceholderKey = "AddColumnPlaceholder";
-      public const double GroupLevelIndent = 18;
-
+   partial class ExecutionStrategyEditor : Control { 
       static ExecutionStrategyEditor() =>
          DefaultStyleKeyProperty.OverrideMetadata(typeof(ExecutionStrategyEditor), new FrameworkPropertyMetadata(typeof(ExecutionStrategyEditor)));
 
@@ -50,6 +44,13 @@ namespace mbts.ui.spark {
       public TickFactors TickFactors { get => GetValue(TickFactorsProperty) as TickFactors; set => SetValue(TickFactorsProperty, value); }
       #endregion
 
+      #region AvailableTickFactors
+      public static readonly DependencyProperty AvailableTickFactorsProperty = DependencyProperty.Register(
+         nameof(AvailableTickFactors), typeof(IEnumerable), typeof(ExecutionStrategyEditor), new PropertyMetadata(new TickFactors[0]));
+
+      public IEnumerable AvailableTickFactors { get => GetValue(AvailableTickFactorsProperty) as IEnumerable; set => SetValue(AvailableTickFactorsProperty, value); }
+      #endregion
+
       #region IsNew
       public static readonly DependencyProperty IsNewProperty =
          DependencyProperty.Register(
@@ -195,7 +196,7 @@ namespace mbts.ui.spark {
          if (dg != null) {
             var legs = LegTuples;
             dg.Columns.SetItems(legs.Select(_column_factory));
-            if (IsNew) dg.Columns.Add((DataGridColumn)FindResource(AddColumnPlaceholderKey));
+            if (IsNew) dg.Columns.Add((DataGridColumn)FindResource("AddColumnPlaceholder"));
             _dg_line_adorner = AdornerHelper.attach_continuously_on_loaded(() => new ExecutionStrategyGridLineAdorner(dg), dg);
             _legs_collection_changed_sub = (legs as INotifyCollectionChanged)?.Subscribe((s, e) => dg.Columns.ReflectChange(legs, _column_factory, e));
          }
@@ -203,7 +204,7 @@ namespace mbts.ui.spark {
 
       DataGridColumn _column_factory(LegSpreaderParamsTuple l) {
          var col = new DataGridColumnInternal(l.leg.Security, ParameterCellTemplateConverter, ParameterCellEditingTemplateConverter) { Width = 75, };
-         col.HeaderTemplate = (DataTemplate)FindResource(IsNew ? RemovableColumnHeaderTemplateKey : NonRemovableColumnHeaderTemplateKey);
+         if (IsNew) col.HeaderTemplate = (DataTemplate)FindResource("RemovableColumnHeaderTemplate");
          DataGridEx.SetRightBorder(col, new DataGridExVerticalLine(false, true, Colors.DarkGray, 1));
          return col;
       }
@@ -239,18 +240,18 @@ namespace mbts.ui.spark {
          FrameworkElement _generate_element(IValueConverter cell_template_converter) {
             var rv = new ContentControl();
             rv.SetBinding(ContentControl.ContentProperty, new Binding());
-            rv.SetBinding(ContentControl.ContentTemplateProperty, new Binding(nameof(ICell.data_type)) { Converter = cell_template_converter });
+            rv.SetBinding(ContentControl.ContentTemplateProperty, new Binding("data_type") { Converter = cell_template_converter });
             return rv;
          }
       }
 
       class ExecutionStrategyErrorAdorner : NotifyDataErrorAdorner<ExecutionStrategyEditor, SyntheticEditorVM>, IDisposable {
          readonly ChildProperty<TextBox> _name_text_box;
-         readonly ChildProperty<TickFactorsPicker> _tick_factors_picker;
+         readonly ChildProperty<ComboBox> _tick_combo_box;
 
          public ExecutionStrategyErrorAdorner(ExecutionStrategyEditor editor) : base(editor) {
             _name_text_box = child_property<TextBox>("PART_Name_TextBox");
-            _tick_factors_picker = child_property<TickFactorsPicker>("PART_TickFactorsPicker");
+            _tick_combo_box = child_property<ComboBox>("PART_Tick_ComboBox");
          }
 
          protected override void OnRender(DrawingContext drawing_context) {
@@ -262,7 +263,7 @@ namespace mbts.ui.spark {
                if (_vm != null && _vm.GetErrors(nameof(SyntheticEditorVM.name)).Cast<string>().Any())
                   this.draw_border(drawing_context, _name_text_box.value, null, new Pen(Brushes.Red, 1));
                if (_vm != null && _vm.GetErrors(nameof(SyntheticEditorVM.tick_factors)).Cast<string>().Any())
-                  this.draw_border(drawing_context, _tick_factors_picker.value, null, new Pen(Brushes.Red, 1));
+                  this.draw_border(drawing_context, _tick_combo_box.value, null, new Pen(Brushes.Red, 1));
                string error_text = string.Join(", ", _vm.AllErrors);
                this.draw_relative_text(RelativePosition.Below, error_text, drawing_context, _name_text_box.value, BTSColors.header_error_text_brush, 0, y_offset);
             }

src/client/spark/Modules/Spreader/ExecutionStrategyGridLineAdorner.cs

@@ -25,10 +25,7 @@ namespace mbts.ui.spark
          void _items_presenter_SizeChanged(object sender, SizeChangedEventArgs e) { InvalidateVisual(); }
 
          protected override void draw_vertical_line(DrawingContext dc, double x, DataGridExVerticalLine line) {
-            x -= GroupLevelIndent;
-            var start = _grid.TranslatePoint(new Point(x, _grid.super_header_height + _col_header_presenter.ActualHeight), this);
-            var stop = _grid.TranslatePoint(new Point(x, _grid.ActualHeight), this);
-            dc.DrawLine(line.pen.Value, start, stop);
+            if (_items_presenter != null) dc.DrawLine(line.pen.Value, new Point(x - 10, 58), new Point(x - 10, _items_presenter.ActualHeight + 58));
          }
       }
    }

src/client/spark/Modules/Spreader/ShowSyntheticEditorHandler.cs

@@ -98,9 +98,9 @@ namespace bts.shell {
       void IInitializable.initialize() {
          Disposable.dispose(ref _dispose);
          _dispose = Disposable.Create(
-            _bus.subscribe(SparkTags.ShowSyntheticCreateTag).OnDispatcher().Subscribe(_show_synthetic_create),
-            _bus.subscribe(SparkTags.ShowSyntheticStrategyTag).OnDispatcher().Subscribe(_show_synthetic_strategy),
-            _bus.subscribe(SparkTags.ShowSyntheticCloneTag).OnDispatcher().Subscribe(_show_synthetic_clone)
+            _bus.subscribe(SparkTags.ShowSyntheticCreateTag).ObserveOnDispatcher().Subscribe(_show_synthetic_create),
+            _bus.subscribe(SparkTags.ShowSyntheticStrategyTag).ObserveOnDispatcher().Subscribe(_show_synthetic_strategy),
+            _bus.subscribe(SparkTags.ShowSyntheticCloneTag).ObserveOnDispatcher().Subscribe(_show_synthetic_clone)
          );
       }
 

src/client/spark/Modules/Spreader/SyntheticEditorView.xaml

@@ -23,6 +23,7 @@
       HorizontalAlignment="Stretch" Margin="6"
       SyntheticName="{Binding name}"
       TickFactors="{Binding tick_factors}"
+      AvailableTickFactors="{Binding available_tick_factors_view}"
       IsNew="{Binding is_new}"
       CanUserAddNewLeg="{Binding can_add_leg}"
       IsNewLegPopupOpen="{Binding is_new_leg_popup_open}"

src/client/spark/Modules/Spreader/SyntheticManagementWindow.cs

@@ -32,14 +32,14 @@ namespace mbts.spark {
             SparkCommand.create("Add", Icons.AddSynthetic, SparkTags.ShowSyntheticCreateTag).complete(
                () => new SecurityCriteria(), () => true
             ), SparkCommand.create("Remove", Icons.RemoveSynthetic, SparkTags.SyntheticDeleteTag).complete(
-               _vm.observable.SelectMany(vm => vm.current_row_observable.SelectMany(observe_row_mod_params)),
-               can_execute, select_security_id
+               _vm.observable.SelectMany(vm => vm.current_row_observable),
+               can_row_change, r => r == null ? 0 : r.security_key
             ), SparkCommand.create("Change", Icons.ModifySynthetic, SparkTags.ShowSyntheticStrategyTag).complete(
                _vm.observable.SelectMany(vm => vm.current_row_observable),
-               r => r != null, r => r?.security ?? SecurityDataHelper.Defaults.SecurityImmutable
+               can_row_change, r => r == null ? SecurityDataHelper.Defaults.SecurityImmutable : r.security
             ), SparkCommand.create("Clone", Icons.CloneSynthetic, SparkTags.ShowSyntheticCloneTag).complete(
-               _vm.observable.SelectMany(vm => vm.current_row_observable.SelectMany(observe_row_strategy)),
-               rs => rs.HasValue, select_row_strategy_tuple
+               _vm.observable.SelectMany(vm => vm.current_row_observable),
+               r => r != null && r.strategy.HasValue, r => r == null ? default : (r.security, r.strategy.Value)
             ), SparkCommands.ShowLadder.complete(
                _vm.observable.SelectMany(vm => vm.current_security_md), md => md.HasValue, ObjectHelper.ValueOrDefault
             ), SparkCommands.ShowOrders.complete(() => new OrderBookWindowFactory.OrderBookStartupData {
@@ -49,19 +49,10 @@ namespace mbts.spark {
                })
          };
 
-         IObservable<RowModificationParams?> observe_row_mod_params(SyntheticManagementDialogVM.Row r) =>
-            r == null ? Observable.Return(new RowModificationParams?()) :
-            _orders_model.security_has_working_orders(r.security_key).Select(hwo => RowModificationParams.create(r.security, hwo));
-
-         IObservable<RowStrategy?> observe_row_strategy(SyntheticManagementDialogVM.Row r) =>
-            r == null ? Observable.Return(new RowStrategy?()) :
-            _orders_model.spreader.security_strategy(r.security.Id).Select(strategy => RowStrategy.create(r.security, strategy));
-
-         uint select_security_id(RowModificationParams? rmp) => rmp.HasValue ? rmp.Value.security.Id : 0;
-         (SecurityImmutable, ExecutionStrategyImmutable) select_row_strategy_tuple(RowStrategy? rs) => rs.HasValue ? (rs.Value.security, rs.Value.strategy) : default;
-         bool can_execute(RowModificationParams? rmp) => rmp.HasValue && !rmp.Value.has_working_orders;
+         bool can_row_change(SyntheticManagementDialogVM.Row r) =>
+            r != null && r.n_working_orders == 0;
       }
- 
+
       public void initialize(StartupData state) {
          Logger.notnull(state);
          _state = state;
@@ -80,31 +71,5 @@ namespace mbts.spark {
          Disposable.dispose(ref _vm);
          Commands.OfType<IDisposable>().DisposeAll();
       }
-
-      struct RowModificationParams {
-         public readonly SecurityImmutable security;
-         public readonly bool has_working_orders;
-
-         RowModificationParams(SecurityImmutable security, bool has_working_orders) {
-            this.security = security;
-            this.has_working_orders = has_working_orders;
-         }
-
-         public static RowModificationParams? create(SecurityImmutable security, bool has_working_orders) =>
-            new RowModificationParams(security, has_working_orders);
-      }
-
-      struct RowStrategy {
-         public readonly SecurityImmutable security;
-         public readonly ExecutionStrategyImmutable strategy;
-
-         RowStrategy(SecurityImmutable security, ExecutionStrategyImmutable strategy) {
-            this.security = security;
-            this.strategy = strategy;
-         }
-
-         public static RowStrategy? create(SecurityImmutable security, ExecutionStrategyImmutable strategy) =>
-            new RowStrategy(security, strategy);
-      }
    }
 }

src/client/spark/Modules/Spreader/SyntheticManagementWindowFactory.cs

@@ -16,7 +16,7 @@ namespace bts.shell {
       public SyntheticManagementWindowFactory(SpreaderShellModule module, IBus bus, OrdersModel orders_model) : base(module, "SyntheticManagement") {
          _bus = bus;
          _orders_model = orders_model;
-         _dispose = bus.subscribe(SparkTags.ShowSyntheticManagementTag).OnDispatcher().Subscribe(show);
+         _dispose = bus.subscribe(SparkTags.ShowSyntheticManagementTag).ObserveOnDispatcher().Subscribe(show);
       }
 
       public override Task<IShellWindow> load(StartupData state) =>

src/client/spark/Modules/Spreader/VM/Cell.cs

@@ -10,7 +10,7 @@ namespace mbts.spark {
          readonly Property<bool> _enabled;
 
          protected CellBase(IRowModel model, LegSpreaderParamsTuple leg_tup) =>
-            _enabled = backing(nameof(enabled), model.observe_enabled(leg_tup).OnDispatcher());
+            _enabled = backing(nameof(enabled), model.observe_enabled(leg_tup).ObserveOnDispatcher());
 
          public bool enabled => _enabled.Value;
       }
@@ -24,7 +24,7 @@ namespace mbts.spark {
             : base(model, leg_tup) {
             _model = model;
             _leg_tup = leg_tup;
-            _override_value_sub = model.observe_override_value(leg_tup).OnDispatcher().Subscribe(v => {
+            _override_value_sub = model.observe_override_value(leg_tup).ObserveOnDispatcher().Subscribe(v => {
                value = v;
                RaisePropertyChanged(nameof(value));
             });

src/client/spark/Modules/Spreader/VM/SyntheticEditorVM.cs

@@ -1,7 +1,6 @@
 using bts.api;
 using bts.shell;
 using bts.spark;
-using mbts.spark.utilities;
 using mbts.ui;
 using mbts.ui.shell;
 using mbts.ui.spark;
@@ -11,9 +10,11 @@ using mbts.utils;
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.ComponentModel;
 using System.Linq;
 using System.Reactive.Linq;
 using System.Threading.Tasks;
+using System.Windows.Data;
 using System.Windows.Input;
 using System.Windows.Media;
 
@@ -22,6 +23,7 @@ namespace mbts.spark {
    /// The view model designed to serve as the DataContext for the SyntheticEditorView
    /// </summary>
    partial class SyntheticEditorVM : DisposableViewModelBase, IRequestViewClose, IRequestBindingSourceUpdate, IDisposable {
+      readonly ObservableCollection<TickFactors> _available_tick_factors = new ObservableCollection<TickFactors>(TickUtils.all_present_ticks());
       readonly QuantityModel _quantity_model;
       readonly PriceMultiplierModel _price_mult_model;
       readonly List<IDisposable> _resources = new List<IDisposable>();
@@ -42,10 +44,10 @@ namespace mbts.spark {
          _tick_factors = TickUtils.get_regional_ticks(synthetic.ContractSpec).low_tick;
          title = $"Edit '{synthetic.Synthetic.Name}'";
          icon = Icons.ModifySynthetic;
-         _has_working_orders = backing(nameof(has_working_orders), security_has_working_orders.OnDispatcher());
+         _has_working_orders = backing(nameof(has_working_orders), security_has_working_orders.ObserveOnDispatcher());
          var commit = new ObservantAsyncCommand(commit_async);
-         _resources.Add(security_has_working_orders.Select(v => !v).OnDispatcher().Subscribe(commit));
-         _resources.Add(_has_working_orders.OnDispatcher().Subscribe(vals => {
+         _resources.Add(security_has_working_orders.Select(v => !v).ObserveOnDispatcher().Subscribe(commit));
+         _resources.Add(_has_working_orders.ObserveOnDispatcher().Subscribe(vals => {
             if (vals.newval)
                set_error(nameof(has_working_orders), "Security has working orders");
             else clear_error(nameof(has_working_orders));
@@ -119,7 +121,7 @@ namespace mbts.spark {
                flash_error_msg("Name already taken", SparkUtils.UI.MessageFlashDuration, nameof(name)).ignore();
                valid = false;
             }
-            if (_tick_factors == null || !_tick_factors.is_valid()) {
+            if (_tick_factors == null || !_tick_factors.is_valid() || !_available_tick_factors.Contains(_tick_factors)) {
                flash_error_msg("Please select ticks", SparkUtils.UI.MessageFlashDuration, nameof(tick_factors)).ignore();
                valid = false;
             }
@@ -131,8 +133,6 @@ namespace mbts.spark {
                _synthetic.ContractSpec.LowTick = tick_frac;
                _synthetic.ContractSpec.HighTick = tick_frac;
                _synthetic.ContractSpec.PriceBreak = double.MaxValue;
-               _synthetic.ContractSpec.MainFraction = (uint)MathUtils.factor_out(_tick_factors.tick_base, 10);
-               _synthetic.ContractSpec.PriceDisplayFormat = (uint)_tick_factors.display_digits();
                uint? id = await model.create_synthetic(_synthetic);
                if (id.HasValue && id != 0) {
                   if (await model.save_strategy(id.Value, get_strategy())) {
@@ -152,6 +152,8 @@ namespace mbts.spark {
          _set_ticks_automatically = is_new;
          _set_quantities_automatically = is_new;
          _set_price_mults_automatically = is_new;
+         available_tick_factors_view = CollectionViewSource.GetDefaultView(_available_tick_factors);
+         available_tick_factors_view.GroupDescriptions.Add(new PropertyGroupDescription(nameof(TickFactors.tick_base)));
 
          _quantity_model = new QuantityModel(!is_new);
          _price_mult_model = new PriceMultiplierModel(!is_new);
@@ -171,8 +173,7 @@ namespace mbts.spark {
                }
                _is_setting_price_mults = false;
             };
-            //_can_add_leg = backing(nameof(can_add_leg), leg_tuples.ObserveSelf().Select(_ => leg_count < 2), leg_count < 2);
-            _can_add_leg = backing(nameof(can_add_leg), leg_tuples.ObserveSelf().Select(_ => true), true);
+            _can_add_leg = backing(nameof(can_add_leg), leg_tuples.ObserveSelf().Select(_ => leg_count < 2), leg_count < 2);
          } else {
             _can_add_leg = backing(nameof(can_add_leg), false);
          }
@@ -243,11 +244,9 @@ namespace mbts.spark {
       public TickFactors tick_factors {
          get => _tick_factors;
          set {
-            if (_tick_factors != value) {
-               _tick_factors = value;
-               _set_ticks_automatically = false;
-               RaisePropertyChanged();
-            }
+            _tick_factors = value;
+            _set_ticks_automatically = false;
+            RaisePropertyChanged();
          }
       }
       public bool has_working_orders => _has_working_orders.Value;
@@ -261,6 +260,7 @@ namespace mbts.spark {
       public IRaiseCanExecuteChangedCommand commit { get; }
       public ICommand remove_leg { get; }
       public ContractPickerModel contract_picker_model { get; }
+      public ICollectionView available_tick_factors_view { get; }
 
       public ExecutionStrategyImmutable get_strategy() {
          var mutable_strategy = _strategy.CloneToMutable();
@@ -327,6 +327,8 @@ namespace mbts.spark {
 
       void _deduce_ticks() {
          _tick_factors = TickUtils.deduce_ticks(leg_tuples.Select(l => l.leg.Security.ContractSpec));
+         if (_tick_factors != null && !_available_tick_factors.Contains(tick_factors))
+            _available_tick_factors.Add(_tick_factors);
          RaisePropertyChanged(nameof(tick_factors));
       }
 

src/client/spark/Modules/Spreader/VM/SyntheticManagementDialogVM.cs

@@ -66,7 +66,7 @@ namespace mbts.spark {
                .Select(t => (uint)(t.state
                   .Where(kv => kv.Value.is_active())
                   .Count())
-                ).OnDispatcher());
+                ).ObserveOnDispatcher());
             name = security.Synthetic.Name;
             n_legs = security.Synthetic.Legs.Count();
             description = SecurityFormatter.format_contract_legs(security.Synthetic.Legs);

src/client/spark/Modules/Support/ActivityLog/ActivityLogWindow.cs

@@ -38,7 +38,7 @@ namespace bts.shell
       }
 
       public void thread_init() {
-         _dispose = _message_src.OnDispatcher().Subscribe(_messages.AddLog);
+         _dispose = _message_src.ObserveOnDispatcher().Subscribe(_messages.AddLog);
          _content =
             new LogViewer {
                ItemsSource = _messages,

src/client/spark/Modules/Support/SupportShellModule.cs

@@ -23,7 +23,7 @@ namespace bts.shell {
       public HelpShellModule(IBus bus, IBrowserWindowManager browser) {
          _awf = new ActivityWindowFactory(this, bus);
          _dispose = Disposable.Create(
-            bus.subscribe(SparkTags.ShowUri).OnDispatcher().Subscribe(u => browser.Pages.Add(u))
+            bus.subscribe(SparkTags.ShowUri).ObserveOnDispatcher().Subscribe(u => browser.Pages.Add(u))
          );
       }
 

src/client/spark/Modules/Trading/Fills/FillsVM.cs

@@ -24,16 +24,13 @@ namespace mbts.spark {
       public FillsVM(IBus bus, OrdersModel model, StartupData state)
          : this(bus, model, _get_observable(bus, model, state), state.sorting_criteria, state.filters) { }
 
-      FillsVM(IBus bus, OrdersModel model, IObservable<IIncrementalUpdate<FillTuple, FillTupleKey>> fills_source, IReadOnlyCollection<SortingCriteria> sorting_criteria, FilterStates filters)
-         : base(RXCollection.CreateIncrementalUpdate(fills_source), sorting_criteria) {
+      FillsVM(IBus bus, OrdersModel model, IObservable<ITableUpdateTransform<FillTuple, string>> fills_source, IReadOnlyCollection<SortingCriteria> sorting_criteria, FilterStates filters)
+         : base(RXCollection.CreateTableUpdate(fills_source), sorting_criteria) {
          _model = model;
          account_filter = DiscreteValuesFilterVM.Create<Row, string>(_model.factory.subscribe_accounts(), r => r.account, nameof(Row.account));
          user_filter = DiscreteValuesFilterVM.Create<Row, string>(_model.factory.subscribe_users(), r => r.user, nameof(Row.user));
          security_filter = DiscreteValuesFilterVM.Create<Row, SecurityImmutable, SecurityCriteria>(
-            fills_source.with_respect_to(
-               ft => ft.security_md.HasValue ? ft.security_md.Value.security : SecurityDataHelper.Defaults.SecurityImmutable,
-               s => s.Id, ft => ft.key
-            ).Select(t => (t.added.Values, t.removed.Values)),
+            fills_source.with_respect_to(ft => ft.security ?? SecurityDataHelper.Defaults.SecurityImmutable, s => s.Id, ft => ft.key).Select(t => (t.added, t.removed)),
             r => r.security,
             SecurityCriteria.from_securities,
             SecurityCriteria.get_to_securities(bus),
@@ -129,8 +126,8 @@ namespace mbts.spark {
       protected override Row row_factory(FillTuple row_model) => new Row(row_model, _model);
       protected override IEnumerable<SortingCriteria> get_default_sorting() { yield return new SortingCriteria(nameof(Row.fill_time), false); }
 
-      static IObservable<IIncrementalUpdate<FillTuple, FillTupleKey>> _get_observable(IBus bus, OrdersModel model, StartupData state) {
-         if (!state.orders.is_null_or_empty()) {
+      static IObservable<ITableUpdateTransform<FillTuple, string>> _get_observable(IBus bus, OrdersModel model, StartupData state) {
+         if (state.orders != null && state.orders.Length == 0) {
             var orders_hash = new HashSet<uint>(state.orders);
             return model.on_fill_tuples.filter(f => orders_hash.Contains(f.fill.OrderKey));
          } else return model.on_fill_tuples;
@@ -141,7 +138,7 @@ namespace mbts.spark {
          readonly FillImmutable _fill;
          readonly OrderRecordImmutable _order;
 
-         public Row(FillTuple fill_tuple, OrdersModel model) : base(fill_tuple.security_md.HasValue ? fill_tuple.security_md.Value.security : SecurityDataHelper.Defaults.Security) {
+         public Row(FillTuple fill_tuple, OrdersModel model) : base(fill_tuple.security ?? SecurityDataHelper.Defaults.Security) {
             _fill = fill_tuple.fill;
             _order = fill_tuple.order ?? OrderDataHelper.Defaults.OrderRecordImmutable;
             _model = model;

src/client/spark/Modules/Trading/Fills/FillsWindowFactory.cs

@@ -18,7 +18,7 @@ namespace bts.shell {
          : base(module, "Fills") {
          _bus = bus;
          _orders_model = orders_model;
-         _dispose = bus.subscribe(SparkTags.ShowFillsTag).OnDispatcher().Subscribe(show);
+         _dispose = bus.subscribe(SparkTags.ShowFillsTag).ObserveOnDispatcher().Subscribe(show);
       }
 
       public override Task<IShellWindow> load(StartupData state) =>

src/client/spark/Modules/Trading/LadderWindowFactory.cs

@@ -30,11 +30,12 @@ namespace bts.shell {
          _wm = wm;
          _settings_hub = settings_hub;
          _orders_model = orders_model;
-         _max_ladders_open = (int)(Configuration.get<bts.config.LadderKnobs>().max_open_ladders);
+         var window_props = Configuration.get<bts.config.IShellWindowProps>();
+         _max_ladders_open = (int)(window_props?.ladder?.max_total_open ?? 75);
          _dispose = Disposable.Create(
             bus.subscribe(SparkTags.SecuritiesTag).Subscribe(s => _securities = s),
-            bus.subscribe(SparkTags.ShowLadderTag).OnDispatcher().Subscribe(s => show_windows(new[] { s })),
-            bus.subscribe(SparkTags.ShowLaddersTag).OnDispatcher().Subscribe(show_windows)
+            bus.subscribe(SparkTags.ShowLadderTag).ObserveOnDispatcher().Subscribe(s => show_windows(new[] { s })),
+            bus.subscribe(SparkTags.ShowLaddersTag).ObserveOnDispatcher().Subscribe(show_windows)
          );
       }
 
@@ -76,7 +77,6 @@ namespace bts.shell {
                s.ask_break_line = LadderSettings.Default.ask_break_line;
             if (s.mid_break_line == null)
                s.mid_break_line = LadderSettings.Default.mid_break_line;
-            s.row_height = LadderRender.measure_row_height(s);
             return s;
          }
       }

src/client/spark/Modules/Trading/OrderBookWindowFactory.cs

@@ -17,7 +17,7 @@ namespace bts.shell {
          _bus = bus;
          _model = model;
 
-         _dispose = bus.subscribe(SparkTags.ShowOrderBookTag).OnDispatcher().Subscribe(show);
+         _dispose = bus.subscribe(SparkTags.ShowOrderBookTag).ObserveOnDispatcher().Subscribe(show);
       }
 
       public override Task<IShellWindow> load(OrderBookStartupData state) {

src/client/spark/Modules/Trading/PAndLWindowFactory.cs

@@ -17,7 +17,7 @@ namespace bts.shell {
          _bus = bus;
          _model = model;
 
-         _dispose = bus.subscribe(SparkTags.ShowPAndLTag).OnDispatcher().Subscribe(show);
+         _dispose = bus.subscribe(SparkTags.ShowPAndLTag).ObserveOnDispatcher().Subscribe(show);
       }
 
 

src/client/spark/Orders/ExistingOrderTicketVM.cs

@@ -24,7 +24,7 @@ namespace mbts.spark {
          var security_source = security_md_source.Select(smd => smd.security);
          //
          _security = backing(nameof(security), security_source, SecurityDataHelper.Defaults.SecurityImmutable);
-         properties_vm = new OrderPropertiesEditorVM(model, security_source.OnDispatcher(), order_source.Select(ot => new InlineOrderProperties(model, ot.order.Def)));
+         properties_vm = new OrderPropertiesEditorVM(model, security_source.ObserveOnDispatcher(), order_source.Select(ot => new InlineOrderProperties(model, ot.order.Def)));
          _price = backing(nameof(price), double.NaN);
          size_calculator = new CalculatorLogic(null, calculator_buttons);
          _current_price = backing(nameof(current_price), order_source.Select(ort => ort.order.State.Price));
@@ -83,15 +83,15 @@ namespace mbts.spark {
             size_calculator,
             properties_vm,
             bbo = new BBOVM(security_md_source),
-            order_source.OnDispatcher().Subscribe(ort => {
+            order_source.ObserveOnDispatcher().Subscribe(ort => {
                key = ort.order.Key;
                if (DoubleHelper.IsNaNOrInfinity(price))
                   price = ort.order.State.Price;
                if (!size_calculator.value.HasValue || !size_calculator.value_setter_called)
                   size_calculator.bypass_value_setter(ort.order.State.Quantity);
             }),
-            Observable.Merge(_price_dirty, _size_dirty, _account_dirty, _time_in_force_dirty, _order_type_dirty).OnDispatcher().Subscribe(_ => RaisePropertyChanged(nameof(dirty_items_text))),
-            _price_dirty.observe_current(true).CombineLatest(_size_dirty.observe_current(true), (pd, sd) => pd || sd).DistinctUntilChanged().OnDispatcher().Subscribe(modify_order));
+            Observable.Merge(_price_dirty, _size_dirty, _account_dirty, _time_in_force_dirty, _order_type_dirty).ObserveOnDispatcher().Subscribe(_ => RaisePropertyChanged(nameof(dirty_items_text))),
+            _price_dirty.observe_current(true).CombineLatest(_size_dirty.observe_current(true), (pd, sd) => pd || sd).DistinctUntilChanged().ObserveOnDispatcher().Subscribe(modify_order));
          this.modify_order = modify_order;
          set_price_command = new DelegateCommand<double>(_price.set);
       }

src/client/spark/Orders/FillTuple.cs

@@ -1,53 +1,32 @@
 using bts.api;
 using bts.api.orderman;
-using mbts.utils;
 using System;
 
-namespace mbts.spark {
+namespace mbts.spark
+{
    class FillTuple : IEquatable<FillTuple> {
       public readonly FillImmutable fill;
       public readonly OrderRecordImmutable? order;
-      public readonly SecurityMD? security_md;
-      public readonly FillTupleKey key;
+      public readonly SecurityImmutable? security;
+      public readonly string key;
 
-      public FillTuple(FillImmutable fill, OrderRecordImmutable? order, SecurityMD? security_md) {
+      public FillTuple(FillImmutable fill, OrderRecordImmutable? order, SecurityImmutable? security) {
          this.fill = fill;
          this.order = order;
-         this.security_md = security_md;
-         key = new FillTupleKey(fill.FillKey, order.HasValue ? order.Value.Key : 0u, security_md.HasValue ? security_md.Value.security.Id : 0u);
+         this.security = security;
+         // a FillTuple that DOES NOT HAVE associated order/security needs to be distinguishable
+         // from a FillTuple (of the same underlying FillImmutable) that DOES HAVE associated order/security
+         key = fill.FillKey;
+         if (!order.HasValue) key += "!o";
+         if (!security.HasValue) key += "!s";
       }
 
       public bool Equals(FillTuple other) => other != null
          && other.order.HasValue == order.HasValue
-         && other.security_md.HasValue == security_md.HasValue
+         && other.security.HasValue == security.HasValue
          && other.fill.Equals(fill);
 
       public override bool Equals(object obj) => Equals(obj as FillTuple);
       public override int GetHashCode() => key.GetHashCode();
    }
-
-   struct FillTupleKey : IEquatable<FillTupleKey> {
-      public readonly string fill_key;
-      public readonly uint order_key, security_key;
-
-      public FillTupleKey(string fill_key, uint order_key, uint security_key) {
-         this.fill_key = fill_key;
-         this.order_key = order_key;
-         this.security_key = security_key;
-      }
-
-      public bool Equals(FillTupleKey other) =>
-         other.order_key == order_key &&
-         other.security_key == security_key &&
-         other.fill_key == fill_key;
-
-      public override bool Equals(object obj) =>
-         obj is FillTupleKey k && Equals(k);
-
-      public override int GetHashCode() =>
-         EqualityComparer.aggregate_hash(
-            fill_key.GetHashCode(),
-            (int)order_key,
-            (int)security_key);
-   }
 }

src/client/spark/Orders/FillTupleSource.cs

@@ -1,4 +1,5 @@
-using bts.api.core;
+using bts.api;
+using bts.api.core;
 using bts.api.orderman;
 using mbts.collections;
 using mbts.utils;
@@ -6,25 +7,23 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reactive.Linq;
-using System.Reactive.Subjects;
 using System.Threading;
 
 namespace mbts.spark {
-   class FillTupleSource : IObservable<IIncrementalUpdate<FillTuple, FillTupleKey>>, IDisposable {
-      // returns a ref-count Observable.Create-wrapper that initializes/destroys the [hot-observable] FillTupleSource.
-      // (initializes when the first subscription is made, and destroys when the last subscription is disposed).
-      public static IObservable<IIncrementalUpdate<FillTuple, FillTupleKey>> create_observable(
+   class FillTupleSource : IDisposable {
+      public static IObservable<ITableUpdateTransform<FillTuple, string>> create_observable(
          IObservable<IReadOnlyDictionary<uint, SecurityMD>> securities,
          IObservable<TableUpdate<OrderRecordImmutable, uint>> orders,
-         IObservable<TableUpdate<FillImmutable, string>> fills) {
+         IObservable<TableUpdate<FillImmutable, string>> fills
+      ) {
          FillTupleSource source = null;
          int ref_count = 0;
-         return Observable.Create<IIncrementalUpdate<FillTuple, FillTupleKey>>(observer => {
+         return Observable.Create<TableUpdateTransform<FillTuple, string>>(observer => {
             if (Interlocked.Increment(ref ref_count) == 1) {
                SparkUtils.lazy_assert(source == null, () => fmt_assert_msg("source should be null, there must be a leak."));
                source = new FillTupleSource(securities, orders, fills);
             }
-            IDisposable sub = source.Subscribe(observer);
+            IDisposable sub = source.fill_tuples.Subscribe(observer);
             return Disposable.Create(() => {
                Disposable.dispose_once(ref sub);
                if (Interlocked.Decrement(ref ref_count) == 0)
@@ -34,157 +33,153 @@ namespace mbts.spark {
          string fmt_assert_msg(string msg) => $"{nameof(FillTupleSource)}.{nameof(create_observable)}: {msg}";
       }
 
-      readonly Subject<IIncrementalUpdate<FillTuple, FillTupleKey>> _subject = new Subject<IIncrementalUpdate<FillTuple, FillTupleKey>>();
-      readonly Dictionary<FillTupleKey, FillTuple> _state = new Dictionary<FillTupleKey, FillTuple>();
-      readonly SetMap<uint, string> _order_fills = new SetMap<uint, string>();
-      readonly SetMap<uint, string> _security_fills = new SetMap<uint, string>();
-      IReadOnlyDictionary<string, FillImmutable> _fills_cache = new Dictionary<string, FillImmutable>(0);
-      IReadOnlyDictionary<uint, OrderRecordImmutable> _orders_cache = new Dictionary<uint, OrderRecordImmutable>(0);
-      IReadOnlyDictionary<uint, SecurityMD> _security_md_cache = new Dictionary<uint, SecurityMD>(0);
-      // _n_write_ops should never be greater than 1, bc all 3 input observables fire 'OnDispatcher'
-      int _n_read_ops, _n_write_ops; 
       IDisposable _dispose;
 
       FillTupleSource(
          IObservable<IReadOnlyDictionary<uint, SecurityMD>> securities,
          IObservable<TableUpdate<OrderRecordImmutable, uint>> orders,
-         IObservable<TableUpdate<FillImmutable, string>> fills) =>
-         //
+         IObservable<TableUpdate<FillImmutable, string>> fills) {
+         State state = new State();
+         var src = Observable.FromEvent<Action<TableUpdateTransform<FillTuple, string>>, TableUpdateTransform<FillTuple, string>>(cb => _updated += cb, cb => _updated -= cb);
+         fill_tuples = Observable.Create<TableUpdateTransform<FillTuple, string>>(observer => {
+            var init_state = state.fill_tuples.state.ToDictionary();
+            observer.OnNext(new TableUpdateTransform<FillTuple, string>(init_state, init_state.Values.ToList(), new List<FillTuple>(0)));
+            return src.Subscribe(observer);
+         });
          _dispose = Disposable.Create(
-            securities.OnDispatcher().Subscribe(_update_securities),
-            orders.OnDispatcher().Subscribe(_update_orders),
-            fills.OnDispatcher().Subscribe(_update_fills));
-
-      public IDisposable Subscribe(IObserver<IIncrementalUpdate<FillTuple, FillTupleKey>> observer) {
-         using (_read()) {
-            observer.OnNext(new IncrementalUpdate<FillTuple, FillTupleKey>(new Dictionary<FillTupleKey, FillTuple>(_state), new Dictionary<FillTupleKey, FillTuple>(0)));
-            return _subject.Subscribe(observer);
+            securities.ObserveOnDispatcher().Subscribe(s => update(state.update_securities(s))),
+            orders.ObserveOnDispatcher().Subscribe(o => update(state.update_orders(o))),
+            fills.ObserveOnDispatcher().Subscribe(f => update(state.update_fills(f)))
+         );
+         void update(State new_state) {
+            state = new_state;
+            _updated?.Invoke(state.fill_tuples);
          }
       }
 
-      public void Dispose() => Disposable.dispose(ref _dispose);
+      event Action<TableUpdateTransform<FillTuple, string>> _updated;
 
-      void _update_fills(TableUpdate<FillImmutable, string> fills) {
-         using (_write()) {
-            Dictionary<FillTupleKey, FillTuple> removed = new Dictionary<FillTupleKey, FillTuple>(), added = new Dictionary<FillTupleKey, FillTuple>();
-            foreach (FillImmutable fill in fills.removed) {
-               FillTuple old_ft = new FillTuple(fill, _get_order(fill.OrderKey), _get_security_md(fill.SecurityKey));
-               removed.Add(old_ft.key, old_ft);
-               _security_fills.remove(fill.SecurityKey, fill.FillKey);
-               _order_fills.remove(fill.OrderKey, fill.FillKey);
-            }
-            foreach (FillImmutable fill in fills.added) {
-               FillTuple new_ft = new FillTuple(fill, _get_order(fill.OrderKey), _get_security_md(fill.SecurityKey));
-               added.Add(new_ft.key, new_ft);
-               _security_fills.add(fill.SecurityKey, fill.FillKey);
-               _order_fills.add(fill.OrderKey, fill.FillKey);
-            }
-            _fills_cache = fills.state;
-            _apply_changes(added, removed);
+      IObservable<TableUpdateTransform<FillTuple, string>> fill_tuples { get; }
+
+      public void Dispose() =>
+         Disposable.dispose(ref _dispose);
+
+      class State {
+         readonly IReadOnlyDictionary<string, FillImmutable> _fills;
+         readonly IReadOnlyDictionary<uint, OrderRecordImmutable> _orders;
+         readonly IReadOnlyDictionary<uint, SecurityMD> _securities;
+         readonly TableUpdateTransform<FillTuple, string> _fill_tuples;
+         readonly SetMap<uint, string> _order_fills;
+         readonly SetMap<uint, string> _security_fills;
+
+         public State() : this(
+            new Dictionary<string, FillImmutable>(),
+            new Dictionary<uint, OrderRecordImmutable>(),
+            new Dictionary<uint, SecurityMD>(),
+            new TableUpdateTransform<FillTuple, string>(new Dictionary<string, FillTuple>(), new List<FillTuple>(), new List<FillTuple>()),
+            new SetMap<uint, string>(),
+            new SetMap<uint, string>()
+         ) { }
+
+         State(
+            IReadOnlyDictionary<string, FillImmutable> fills,
+            IReadOnlyDictionary<uint, OrderRecordImmutable> orders,
+            IReadOnlyDictionary<uint, SecurityMD> securities,
+            TableUpdateTransform<FillTuple, string> fill_tuples,
+            SetMap<uint, string> order_fill_tuples,
+            SetMap<uint, string> security_fill_tuples
+         ) {
+            _fills = fills;
+            _orders = orders;
+            _securities = securities;
+            _fill_tuples = fill_tuples;
+            _order_fills = order_fill_tuples;
+            _security_fills = security_fill_tuples;
          }
-      }
 
-      void _update_orders(TableUpdate<OrderRecordImmutable, uint> orders) {
-         using (_write()) {
-            Dictionary<FillTupleKey, FillTuple> added = new Dictionary<FillTupleKey, FillTuple>(), removed = new Dictionary<FillTupleKey, FillTuple>();
-            HashSet<uint> changed_keys = new HashSet<uint>();
-            foreach (var o in orders.removed) {
-               if (_order_fills.try_lookup(o.Key, out ISet<string> fill_keys)) {
-                  IEnumerable<FillImmutable> fills = fill_keys.Select(fk => _fills_cache[fk]);
-                  SecurityMD? sec_md = _get_security_md(o.security_key());
-                  foreach (FillImmutable fill in fills) {
-                     FillTuple old_ft = new FillTuple(fill, o, sec_md);
-                     removed.Add(old_ft.key, old_ft);
-                  }
-                  OrderRecordImmutable? curr_order = null;
-                  if (orders.try_get(o.Key, out OrderRecordImmutable newval)) {
-                     curr_order = newval;
-                     changed_keys.Add(o.Key);
-                  }
-                  foreach (FillImmutable fill in fills) {
-                     FillTuple new_ft = new FillTuple(fill, curr_order, sec_md);
-                     added.Add(new_ft.key, new_ft);
-                  }
+         public TableUpdateTransform<FillTuple, string> fill_tuples => _fill_tuples;
+
+         public State update_fills(TableUpdate<FillImmutable, string> fills) {
+            var removed = fills.removed.Select(get_fill_tuple).ToList();
+            var added = fills.added.Select(get_fill_tuple).ToList();
+            var order_fills = _order_fills.clone();
+            var security_fills = _security_fills.clone();
+            HashSet<string> added_keys = new HashSet<string>(fills.added.Select(f => f.FillKey)),
+               removed_keys = new HashSet<string>(fills.removed.Select(f => f.FillKey));
+            foreach (var ft in removed) {
+               string k = ft.fill.FillKey;
+               if (!added_keys.Contains(k)) {
+                  order_fills.remove(ft.fill.OrderKey, k);
+                  security_fills.remove(ft.fill.SecurityKey, k);
                }
             }
-            foreach (var o in orders.added) {
-               if (!changed_keys.Contains(o.Key) && _order_fills.try_lookup(o.Key, out ISet<string> fill_keys)) {
-                  IEnumerable<FillImmutable> fills = fill_keys.Select(fk => _fills_cache[fk]);
-                  SecurityMD? sec_md = _get_security_md(o.security_key());
-                  foreach (FillImmutable fill in fills) {
-                     FillTuple old_ft = new FillTuple(fill, null, sec_md);
-                     removed.Add(old_ft.key, old_ft);
-                     FillTuple new_ft = new FillTuple(fill, o, sec_md);
-                     added.Add(new_ft.key, new_ft);
-                  }
+            foreach (var ft in added) {
+               string k = ft.fill.FillKey;
+               if (!removed_keys.Contains(k)) {
+                  order_fills.add(ft.fill.OrderKey, k);
+                  security_fills.add(ft.fill.SecurityKey, k);
                }
             }
-            _orders_cache = orders.state;
-            _apply_changes(added, removed);
+            return new State(fills.state, _orders, _securities, _fill_tuples.update(removed, added, f => f.key), order_fills, security_fills);
+            //
+            FillTuple get_fill_tuple(FillImmutable fill) =>
+               new FillTuple(fill, _orders.TryGetValue(fill.OrderKey, out OrderRecordImmutable o) ? o : new OrderRecordImmutable?(),
+                  _securities.TryGetValue(fill.SecurityKey, out SecurityMD s) ? s.security : new SecurityImmutable?());
          }
-      }
 
-      void _update_securities(IReadOnlyDictionary<uint, SecurityMD> securities) {
-         using (_write()) {
-            Dictionary<FillTupleKey, FillTuple> added = new Dictionary<FillTupleKey, FillTuple>(), removed = new Dictionary<FillTupleKey, FillTuple>();
-            _security_md_cache.Keys.difference(securities.Keys, out IEnumerable<uint> added_keys, out IEnumerable<uint> removed_keys);
+         public State update_orders(TableUpdate<OrderRecordImmutable, uint> orders) {
+            List<FillTuple> added = new List<FillTuple>(), removed = new List<FillTuple>();
+            orders.detect_changed_keys(o => o.Key, out HashSet<uint> removed_keys, out HashSet<uint> added_keys, out HashSet<uint> changed_keys);
+            foreach (var k in removed_keys) {
+               if (_order_fills.try_lookup(k, out ISet<string> fill_keys)) {
+                  removed.AddRange(get_fill_tuples(_orders[k], fill_keys));
+                  added.AddRange(get_fill_tuples(null, fill_keys));
+               }
+            }
+            foreach (var k in added_keys) {
+               if (_order_fills.try_lookup(k, out ISet<string> fill_keys)) {
+                  removed.AddRange(get_fill_tuples(null, fill_keys));
+                  added.AddRange(get_fill_tuples(orders.get(k), fill_keys));
+               }
+            }
+            foreach (var k in changed_keys) {
+               if (_order_fills.try_lookup(k, out ISet<string> fill_keys)) {
+                  removed.AddRange(get_fill_tuples(_orders[k], fill_keys));
+                  added.AddRange(get_fill_tuples(orders.get(k), fill_keys));
+               }
+            }
+            return new State(_fills, orders.state, _securities, _fill_tuples.update(removed, added, ft => ft.key), _order_fills, _security_fills);
+            //
+            IEnumerable<FillTuple> get_fill_tuples(OrderRecordImmutable? o, ISet<string> fill_keys) =>
+               fill_keys.Select(k => {
+                  var fill = _fills[k];
+                  return new FillTuple(fill, o, _securities.TryGetValue(fill.SecurityKey, out SecurityMD s) ? s.security : new SecurityImmutable?());
+               });
+         }
+
+         public State update_securities(IReadOnlyDictionary<uint, SecurityMD> securities) {
+            List<FillTuple> added = new List<FillTuple>(), removed = new List<FillTuple>();
+            _securities.Keys.difference(securities.Keys, out IEnumerable<uint> added_keys, out IEnumerable<uint> removed_keys);
             foreach (var k in removed_keys) {
                if (_security_fills.try_lookup(k, out ISet<string> fill_keys)) {
-                  IEnumerable<FillImmutable> fills = fill_keys.Select(fk => _fills_cache[fk]);
-                  SecurityMD old_sec_md = _security_md_cache[k];
-                  foreach (FillImmutable fill in fills) {
-                     OrderRecordImmutable? order = _get_order(fill.OrderKey);
-                     FillTuple old_ft = new FillTuple(fill, order, old_sec_md);
-                     removed.Add(old_ft.key, old_ft);
-                     FillTuple new_ft = new FillTuple(fill, order, null);
-                     added.Add(new_ft.key, new_ft);
-                  }
+                  removed.AddRange(get_fill_tuples(_securities[k].security, fill_keys));
+                  added.AddRange(get_fill_tuples(null, fill_keys));
                }
             }
             foreach (var k in added_keys) {
                if (_security_fills.try_lookup(k, out ISet<string> fill_keys)) {
-                  IEnumerable<FillImmutable> fills = fill_keys.Select(fk => _fills_cache[fk]);
-                  SecurityMD new_sec_md = securities[k];
-                  foreach (FillImmutable fill in fills) {
-                     OrderRecordImmutable? order = _get_order(fill.OrderKey);
-                     FillTuple old_ft = new FillTuple(fill, order, null);
-                     removed.Add(old_ft.key, old_ft);
-                     FillTuple new_ft = new FillTuple(fill, order, new_sec_md);
-                     added.Add(new_ft.key, new_ft);
-                  }
+                  removed.AddRange(get_fill_tuples(null, fill_keys));
+                  added.AddRange(get_fill_tuples(securities[k].security, fill_keys));
                }
             }
-            _security_md_cache = securities;
-            _apply_changes(added, removed);
+            return new State(_fills, _orders, securities, _fill_tuples.update(removed, added, f => f.key), _order_fills, _security_fills);
+            //
+            IEnumerable<FillTuple> get_fill_tuples(SecurityImmutable? s, ISet<string> fill_keys) =>
+               fill_keys.Select(k => {
+                  var fill = _fills[k];
+                  return new FillTuple(fill, _orders.TryGetValue(fill.OrderKey, out OrderRecordImmutable o) ? o : new OrderRecordImmutable?(), s);
+               });
          }
       }
-
-      SecurityMD? _get_security_md(uint key) =>
-         _security_md_cache.TryGetValue(key, out SecurityMD smd) ? smd : new SecurityMD?();
-
-      OrderRecordImmutable? _get_order(uint key) =>
-         _orders_cache.TryGetValue(key, out OrderRecordImmutable o) ? o : new OrderRecordImmutable?();
-
-      void _apply_changes(Dictionary<FillTupleKey, FillTuple> added, Dictionary<FillTupleKey, FillTuple> removed) {
-         foreach (var kv in removed)
-            _state.Remove(kv.Key);
-         foreach (var kv in added)
-            _state.Add(kv.Key, kv.Value);
-         _subject.OnNext(new IncrementalUpdate<FillTuple, FillTupleKey>(added, removed));
-      }
-
-      IDisposable _read() {
-         while (_n_write_ops > 0)
-            Thread.Yield();
-         Interlocked.Increment(ref _n_read_ops);
-         return Disposable.Create(() => Interlocked.Decrement(ref _n_read_ops));
-      }
-
-      IDisposable _write() {
-         while (_n_read_ops > 0)
-            Thread.Yield();
-         Interlocked.Increment(ref _n_write_ops);
-         return Disposable.Create(() => Interlocked.Decrement(ref _n_write_ops));
-      }
    }
 }

src/client/spark/Orders/NewOrderTicketVM.cs

@@ -61,7 +61,7 @@ namespace mbts.spark {
          set_price_command = new DelegateCommand<double>(set_price);
          _dispose = Disposable.Create(
             size_calculator = new CalculatorLogic(0, calculator_buttons),
-            props_source.OnDispatcher().Subscribe(p => on_props(p.price, p.size))
+            props_source.ObserveOnDispatcher().Subscribe(p => on_props(p.price, p.size))
          );
 
          void on_props(InlineUserProperty<double> price_prop, InlineUserProperty<uint> size_prop) {

src/client/spark/Orders/OrderActivitySummarizer.cs

@@ -114,7 +114,7 @@ namespace bts.spark {
             (var security, var spec) = get_security(neworder.Def.SecurityKey);
             //
             // description
-            var mod_desc = modified_description(oldorder, neworder, spec);
+            var mod_desc = modified_description(oldorder, neworder, spec.Value);
             if (!string.IsNullOrEmpty(mod_desc)) {
                log_status(ActivityLogCategory.modify, security, mod_desc);
             }

src/client/spark/Orders/OrderModificationControl.xaml.cs

@@ -20,10 +20,6 @@ namespace mbts.ui.spark {
       public DataTemplate StopLimitOrderTemplate { get; set; }
       public DataTemplate StopMarketOrderTemplate { get; set; }
       public DataTemplate TimeBoxOrderTemplate { get; set; }
-      public DataTemplate TickOrderTemplate { get; set; }
-      public DataTemplate LeanOrderTemplate { get; set; }
-      public DataTemplate JoinOrderTemplate { get; set; }
-      public DataTemplate TopOrderTemplate { get; set; }
       public DataTemplate IcebergOrderTemplate { get; set; }
       public DataTemplate SpreaderTemplate { get; set; }
       public DataTemplate BTSStopOrderTemplate { get; set; }
@@ -37,10 +33,6 @@ namespace mbts.ui.spark {
                case CustomOrderDefinition.CustomOneofCase.Stop: return StopMarketOrderTemplate;
                case CustomOrderDefinition.CustomOneofCase.StopLimit: return StopLimitOrderTemplate;
                case CustomOrderDefinition.CustomOneofCase.TimeBox: return TimeBoxOrderTemplate;
-               case CustomOrderDefinition.CustomOneofCase.Tick: return TickOrderTemplate;
-               case CustomOrderDefinition.CustomOneofCase.Lean: return LeanOrderTemplate;
-               case CustomOrderDefinition.CustomOneofCase.Join: return JoinOrderTemplate;
-               case CustomOrderDefinition.CustomOneofCase.Top: return TopOrderTemplate;
                case CustomOrderDefinition.CustomOneofCase.Iceberg: return IcebergOrderTemplate;
                case CustomOrderDefinition.CustomOneofCase.Spreader: return SpreaderTemplate;
             }

src/client/spark/Orders/OrderPropertiesEditorVM.cs

@@ -46,7 +46,7 @@ namespace mbts.spark {
 
       public OrderPropertiesEditorVM(OrdersModel model, IObservable<SecurityImmutable> security_source, IObservable<InlineOrderProperties> order_properties) {
          _model = model;
-         _security = backing(nameof(security), security_source.OnDispatcher(), SecurityDataHelper.Defaults.SecurityImmutable);
+         _security = backing(nameof(security), security_source.ObserveOnDispatcher(), SecurityDataHelper.Defaults.SecurityImmutable);
          // guarentee that "this.security" will always be set before observers are notified
          // this is important bc some observers will reference "this.security" in their callbacks
          // - namely the [SelectorProperty]order_type's "get_default" function,

src/client/spark/Orders/OrderTypeVMs/IcebergOrderVM.cs

@@ -44,9 +44,9 @@ namespace mbts.spark {
             : base(model) {
             _security_source = security_source;
             _dispose = Disposable.Create(
-               security_source.OnDispatcher()
+               security_source.ObserveOnDispatcher()
                .Subscribe(s => _security = s),
-               inline_properties.OnDispatcher()
+               inline_properties.ObserveOnDispatcher()
                .Subscribe(p => {
                   if (_order_types.Count == 0 || p.child_order_types.force_override) {
                      _order_types.SetItems(p.child_order_types.value);

src/client/spark/Orders/OrderTypeVMs/JoinOrderVM.cs

@@ -1,287 +0,0 @@
-using bts.api;
-using bts.api.orderman;
-using mbts.ui;
-using mbts.ui.utility;
-using mbts.utils;
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.ComponentModel;
-using System.Linq;
-using System.Reactive.Linq;
-using static bts.api.orderman.CustomOrderDefinition;
-
-namespace mbts.spark 
-{
-   static partial class OrderTypeVMFactory 
-   {
-      class InlineJoinOrderProperties 
-      {
-         public InlineJoinOrderProperties (CustomOneofCase selected_child_order_type, IReadOnlyCollection<CustomOneofCase> child_order_types) 
-         {
-            ExceptionAssert.InvalidOperation.That(child_order_types.Contains(selected_child_order_type), $"Child order type {selected_child_order_type} is not in child_order_types");
-            this.selected_child_order_type = new InlineUserProperty<CustomOneofCase>(selected_child_order_type, true);
-            this.child_order_types = new InlineUserProperty<IReadOnlyCollection<CustomOneofCase>>(child_order_types, true);
-
-            var hedgetype = CustomOneofCase.Lean;
-            if(!child_order_types.Contains(hedgetype))
-               hedgetype = CustomOneofCase.Limit;
-            
-            //ExceptionAssert.InvalidOperation.That(child_order_types.Contains(hedgetype), $"Hedge order type {hedgetype} is not in hedge_order_types");
-            this.selected_hedge_order_type = new InlineUserProperty<CustomOneofCase>(hedgetype, true);
-            this.hedge_order_types = new InlineUserProperty<IReadOnlyCollection<CustomOneofCase>>(child_order_types, true);
-
-            tick_offset_on_deploy = new InlineUserProperty<uint>(0, false);
-            join_threshold = new InlineUserProperty<bts.spark.QuantityMeasure>(
-                              new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1}, false);
-            enable_hedge = new InlineUserProperty<bool>(false, false);
-            hedge_ticks = new InlineUserProperty<int>(1, false);
-         }
-         public readonly InlineUserProperty<CustomOneofCase> selected_child_order_type;
-         public readonly InlineUserProperty<IReadOnlyCollection<CustomOneofCase>> child_order_types;
-         public readonly InlineUserProperty<CustomOneofCase> selected_hedge_order_type;
-         public readonly InlineUserProperty<IReadOnlyCollection<CustomOneofCase>> hedge_order_types;
-
-
-         public readonly InlineUserProperty<uint> tick_offset_on_deploy;
-         public readonly InlineUserProperty<bts.spark.QuantityMeasure> join_threshold;
-                  
-         public readonly InlineUserProperty<bool> enable_hedge;
-         public readonly InlineUserProperty<int> hedge_ticks;
-
-      }
-
-      class JoinOrderVM : OrderTypeVMBase<JoinOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable 
-      {
-         readonly IObservable<SecurityImmutable> _security_source;
-         SecurityImmutable? _security;
-         ObservableCollection<CustomOneofCase> _order_types = new ObservableCollection<CustomOneofCase>();
-         ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase> _child_order_choices;
-         InlineJoinOrderProperties _inline_props;
-         IOrderTypeVM _child_order;
-         IDisposable _dispose, _child_order_errors_sub;
-
-         ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase> _hedge_order_choices;
-         IOrderTypeVM _hedge_order;
-         IDisposable _hedge_order_errors_sub;
-
-         public uint tick_offset_on_deploy { get; set; } = 0;
-         public bts.spark.QuantityMeasure join_threshold { get; set; } = new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1 };
-         bool _enable_hedge = false;
-         public bool enable_hedge
-         {
-            get { return _enable_hedge; }
-            set
-            {
-               _enable_hedge = value;
-               RaisePropertyChanged(nameof(enable_hedge));
-            }
-         } 
-         public int hedge_ticks { get; set; } = 1;
-
-         public JoinOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source)
-            : this(model, security_source, security_source.Select(s =>
-            new InlineJoinOrderProperties(model.factory.default_order_type(s), model.factory.default_order_types(s).ToList()))) { }
-
-         public JoinOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source,
-                            IObservable<InlineJoinOrderProperties> inline_properties) : base(model) 
-         {
-            _security_source = security_source;
-            _dispose = Disposable.Create(
-               security_source.OnDispatcher()
-               .Subscribe(s => _security = s),
-               inline_properties.OnDispatcher()
-               .Subscribe(p => {
-                  if (_order_types.Count == 0 || p.child_order_types.force_override) 
-                  {
-                     _order_types.SetItems(p.child_order_types.value);
-                  }
-                  if (_child_order_choices != null && (_child_order == null || p.selected_child_order_type.force_override)) 
-                  {
-                     _select_child_order(p.selected_child_order_type.value);
-                  }
-                  if (_hedge_order_choices != null && (_hedge_order == null || p.selected_hedge_order_type.force_override))
-                  {
-                     _select_hedge_order(p.selected_hedge_order_type.value);
-                  }
-                  if (p.tick_offset_on_deploy.force_override) 
-                  {
-                     tick_offset_on_deploy = p.tick_offset_on_deploy.value;
-                     RaisePropertyChanged(nameof(tick_offset_on_deploy));
-                  }
-                  if (p.join_threshold.force_override)
-                  {
-                     join_threshold = p.join_threshold.value;
-                     RaisePropertyChanged(nameof(join_threshold));
-                  }
-                  if (p.enable_hedge.force_override)
-                  {
-                     enable_hedge = p.enable_hedge.value;
-                     RaisePropertyChanged(nameof(enable_hedge));
-                  }
-                  if (p.hedge_ticks.force_override)
-                  {
-                     hedge_ticks = p.hedge_ticks.value;
-                     RaisePropertyChanged(nameof(hedge_ticks));
-                  }
-                  _inline_props = p;
-                  _validate();
-               })
-            );
-            _validate();
-         }
-         
-         public override void assign_to(CustomOrderDefinition value) 
-         {
-            if (_child_order == null)
-               _select_child_order(model.factory.default_order_type(_security.Value, true));
-            if (_hedge_order == null && enable_hedge)
-               _select_hedge_order(model.factory.default_order_type(_security.Value, true));
-            _validate();
-            if (!HasErrors) 
-            {
-               var i = factory.join_order();
-               i.TickOffsetOnDeploy = tick_offset_on_deploy;
-               i.JoinThreshold = join_threshold;
-               i.EnableHedge = enable_hedge;
-               i.HedgeTicks = hedge_ticks;
-               child_order.assign_to(i.Child);
-               if(enable_hedge && hedge_order != null)
-                  hedge_order.assign_to(i.Hedge);
-               value.Join = i;
-            }
-         }         
-
-         public ICollection<IOrderTypeVM> child_order_types 
-         {
-            get 
-            {
-               if (_child_order_choices == null) 
-                  _child_order_choices = new ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase>(_order_types, ot => create(ot, model, _security_source));
-               return _child_order_choices;
-            }
-         }
-
-         public ICollection<IOrderTypeVM> hedge_order_types
-         {
-            get
-            {
-               if (_hedge_order_choices == null)
-                  _hedge_order_choices = new ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase>(_order_types, ot => create(ot, model, _security_source));
-               return _hedge_order_choices;
-            }
-         }         
- 
-         public IOrderTypeVM child_order 
-         {
-            get 
-            {
-               init();
-               return _child_order;
-            }
-            set 
-            {
-               Disposable.dispose(ref _child_order_errors_sub);
-               _child_order = value;
-               _child_order?.init();
-               if (_child_order is INotifyDataErrorInfo ndei) 
-               {
-                  ndei.ErrorsChanged += on_errors_changed;
-                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
-                     _validate();
-                  _child_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
-               }
-               _validate();
-               RaisePropertyChanged(nameof(child_order));
-            }
-         }
-
-         public IOrderTypeVM hedge_order
-         {
-            get
-            {
-               init();
-               return _hedge_order;
-            }
-            set
-            {
-               Disposable.dispose(ref _hedge_order_errors_sub);
-               _hedge_order = value;
-               _hedge_order?.init();
-               if (_hedge_order is INotifyDataErrorInfo ndei)
-               {
-                  ndei.ErrorsChanged += on_errors_changed;
-                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
-                     _validate();
-                  _hedge_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
-               }
-               _validate();
-               RaisePropertyChanged(nameof(hedge_order));
-            }
-         }
-
-         public void Dispose() 
-         {
-            Disposable.dispose(ref _dispose);
-            if (_child_order_choices != null)
-               _child_order_choices.OfType<IDisposable>().DisposeAll();
-            if (_hedge_order_choices != null)
-               _hedge_order_choices.OfType<IDisposable>().DisposeAll();
-         }
-
-         public override void init() 
-         {
-            if (_child_order == null && _security.HasValue)
-               _select_child_order();
-            if (_hedge_order == null && _security.HasValue && enable_hedge)
-               _select_hedge_order();
-            _validate();
-         }
-
-         void _select_child_order() 
-         {
-            CustomOneofCase ot = _inline_props != null && _inline_props.selected_child_order_type.has_value ?
-               _inline_props.selected_child_order_type.value :
-               model.factory.default_order_type(_security.Value, true);
-            _select_child_order(ot);
-         }
-
-         void _select_child_order(CustomOneofCase ot) 
-         {
-            _child_order = child_order_types.FirstOrDefault(vm => vm.order_type == ot);
-            if (_child_order == null)
-               _child_order = child_order_types.FirstOrDefault();
-            RaisePropertyChanged(nameof(child_order));
-         }
-         
-         void _select_hedge_order()
-         {
-            CustomOneofCase ot = _inline_props != null && _inline_props.selected_hedge_order_type.has_value ?
-               _inline_props.selected_hedge_order_type.value :
-               model.factory.default_order_type(_security.Value, true);
-            _select_hedge_order(ot);
-         }
-
-         void _select_hedge_order(CustomOneofCase ot)
-         {
-            _hedge_order = hedge_order_types.FirstOrDefault(vm => vm.order_type == ot);
-            if (_hedge_order == null)
-               _hedge_order = hedge_order_types.FirstOrDefault();
-            RaisePropertyChanged(nameof(hedge_order));
-         }         
-         
-
-         void _validate() 
-         {
-            if (_child_order == null || (_child_order is INotifyDataErrorInfo ndei && ndei.HasErrors))
-               set_error(nameof(child_order), string.Empty, true);
-            else clear_error(nameof(child_order));
-
-            if ( (_hedge_order == null && enable_hedge) || (_hedge_order is INotifyDataErrorInfo hdei && hdei.HasErrors))
-               set_error(nameof(hedge_order), string.Empty, true);
-            else clear_error(nameof(hedge_order));
-
-         }
-      }
-   }
-}

src/client/spark/Orders/OrderTypeVMs/LeanOrderVM.cs

@@ -1,174 +0,0 @@
-using bts.api;
-using bts.api.orderman;
-using mbts.ui;
-using mbts.ui.utility;
-using mbts.utils;
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.ComponentModel;
-using System.Linq;
-using System.Reactive.Linq;
-using static bts.api.orderman.CustomOrderDefinition;
-
-namespace mbts.spark 
-{
-   static partial class OrderTypeVMFactory 
-   {
-      class InlineLeanOrderProperties 
-      {
-         public InlineLeanOrderProperties (CustomOneofCase selected_child_order_type, IReadOnlyCollection<CustomOneofCase> child_order_types) 
-         {
-            ExceptionAssert.InvalidOperation.That(child_order_types.Contains(selected_child_order_type), $"Child order type {selected_child_order_type} is not in child_order_types");
-            this.selected_child_order_type = new InlineUserProperty<CustomOneofCase>(selected_child_order_type, true);
-            this.child_order_types = new InlineUserProperty<IReadOnlyCollection<CustomOneofCase>>(child_order_types, true);
-            cross_threshold = new InlineUserProperty<bts.spark.QuantityMeasure>(
-                              new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1}, false);
-            max_chase_ticks = new InlineUserProperty<uint>(10, false);
-         }
-         public readonly InlineUserProperty<CustomOneofCase> selected_child_order_type;
-         public readonly InlineUserProperty<IReadOnlyCollection<CustomOneofCase>> child_order_types;
-         
-         public readonly InlineUserProperty<bts.spark.QuantityMeasure> cross_threshold;
-         public readonly InlineUserProperty<uint> max_chase_ticks;
-      }
-
-      class LeanOrderVM : OrderTypeVMBase<LeanOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable 
-      {
-         readonly IObservable<SecurityImmutable> _security_source;
-         SecurityImmutable? _security;
-         ObservableCollection<CustomOneofCase> _order_types = new ObservableCollection<CustomOneofCase>();
-         ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase> _child_order_choices;
-         InlineLeanOrderProperties _inline_props;
-         IOrderTypeVM _child_order;
-         IDisposable _dispose, _child_order_errors_sub;
-         
-         public bts.spark.QuantityMeasure cross_threshold { get; set; } = new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1 };
-         public uint max_chase_ticks { get; set; } = 10;
-
-         public LeanOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source)
-            : this(model, security_source, security_source.Select(s =>
-            new InlineLeanOrderProperties(model.factory.default_order_type(s), model.factory.default_order_types(s).ToList()))) { }
-
-         public LeanOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source,
-                            IObservable<InlineLeanOrderProperties> inline_properties) : base(model) 
-         {
-            _security_source = security_source;
-            _dispose = Disposable.Create(
-               security_source.OnDispatcher()
-               .Subscribe(s => _security = s),
-               inline_properties.OnDispatcher()
-               .Subscribe(p => {
-                  if (_order_types.Count == 0 || p.child_order_types.force_override) 
-                  {
-                     _order_types.SetItems(p.child_order_types.value);
-                  }
-                  if (_child_order_choices != null && (_child_order == null || p.selected_child_order_type.force_override)) 
-                  {
-                     _select_child_order(p.selected_child_order_type.value);
-                  }                  
-                  if (p.cross_threshold.force_override)
-                  {
-                     cross_threshold = p.cross_threshold.value;
-                     RaisePropertyChanged(nameof(cross_threshold));
-                  }
-                  if (p.max_chase_ticks.force_override)
-                  {
-                     max_chase_ticks = p.max_chase_ticks.value;
-                     RaisePropertyChanged(nameof(max_chase_ticks));
-                  }
-                  _inline_props = p;
-                  _validate();
-               })
-            );
-            _validate();
-         }
-         
-         public override void assign_to(CustomOrderDefinition value) 
-         {
-            if (_child_order == null)
-               _select_child_order(model.factory.default_order_type(_security.Value, true));
-            _validate();
-            if (!HasErrors) 
-            {
-               var i = factory.lean_order();
-               i.CrossThreshold = cross_threshold;
-               i.MaxChaseTicks = max_chase_ticks;
-               child_order.assign_to(i.Child);
-               value.Lean = i;
-            }
-         }         
-
-         public ICollection<IOrderTypeVM> child_order_types 
-         {
-            get 
-            {
-               if (_child_order_choices == null) 
-                  _child_order_choices = new ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase>(_order_types, ot => create(ot, model, _security_source));
-               return _child_order_choices;
-            }
-         }
- 
-         public IOrderTypeVM child_order 
-         {
-            get 
-            {
-               init();
-               return _child_order;
-            }
-            set 
-            {
-               Disposable.dispose(ref _child_order_errors_sub);
-               _child_order = value;
-               _child_order?.init();
-               if (_child_order is INotifyDataErrorInfo ndei) 
-               {
-                  ndei.ErrorsChanged += on_errors_changed;
-                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
-                     _validate();
-                  _child_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
-               }
-               _validate();
-               RaisePropertyChanged(nameof(child_order));
-            }
-         }         
-
-         public void Dispose() 
-         {
-            Disposable.dispose(ref _dispose);
-            if (_child_order_choices != null)
-               _child_order_choices.OfType<IDisposable>().DisposeAll();
-         }
-
-         public override void init() 
-         {
-            if (_child_order == null && _security.HasValue)
-               _select_child_order();
-            _validate();
-         }
-
-         void _select_child_order() 
-         {
-            CustomOneofCase ot = _inline_props != null && _inline_props.selected_child_order_type.has_value ?
-               _inline_props.selected_child_order_type.value :
-               model.factory.default_order_type(_security.Value, true);
-            _select_child_order(ot);
-         }
-
-         void _select_child_order(CustomOneofCase ot) 
-         {
-            _child_order = child_order_types.FirstOrDefault(vm => vm.order_type == ot);
-            if (_child_order == null)
-               _child_order = child_order_types.FirstOrDefault();
-            RaisePropertyChanged(nameof(child_order));
-         }
-
-         void _validate() 
-         {
-            if (_child_order == null || (_child_order is INotifyDataErrorInfo ndei && ndei.HasErrors))
-               set_error(nameof(child_order), string.Empty, true);
-            else clear_error(nameof(child_order));
-         }
-      }
-   }
-}

src/client/spark/Orders/OrderTypeVMs/OrderTypeVMFactory.cs

@@ -14,10 +14,6 @@ namespace mbts.spark {
       public static IOrderTypeVM stop(OrdersModel model) => new StopOrderVM(model);
       public static IOrderTypeVM stop_limit(OrdersModel model) => new StopLimitOrderVM(model);
       public static IOrderTypeVM time_box(OrdersModel model, IObservable<SecurityImmutable> security_source) => new TimeBoxOrderVM(model, security_source);
-      public static IOrderTypeVM tick(OrdersModel model, IObservable<SecurityImmutable> security_source) => new TickOrderVM(model, security_source);
-      public static IOrderTypeVM lean(OrdersModel model, IObservable<SecurityImmutable> security_source) => new LeanOrderVM(model, security_source);
-      public static IOrderTypeVM join(OrdersModel model, IObservable<SecurityImmutable> security_source) => new JoinOrderVM(model, security_source);
-      public static IOrderTypeVM top(OrdersModel model, IObservable<SecurityImmutable> security_source) => new TopOrderVM(model, security_source);
       public static IOrderTypeVM iceberg(OrdersModel model, IObservable<SecurityImmutable> security_source) => new IcebergOrderVM(model, security_source);
       public static IOrderTypeVM spreader(OrdersModel model, IObservable<SecurityImmutable> security_source) => new SpreaderOrderVM(model, security_source);
 
@@ -31,10 +27,6 @@ namespace mbts.spark {
             case CustomOneofCase.Stop: return stop(model);
             case CustomOneofCase.StopLimit: return stop_limit(model);
             case CustomOneofCase.TimeBox: return time_box(model, security_source);
-            case CustomOneofCase.Tick: return tick(model, security_source);
-            case CustomOneofCase.Lean: return lean(model, security_source);
-            case CustomOneofCase.Join: return join(model, security_source);
-            case CustomOneofCase.Top: return top(model, security_source);
             case CustomOneofCase.Iceberg: return iceberg(model, security_source);
             case CustomOneofCase.Spreader: return spreader(model, security_source);
             default: throw new NotImplementedException();

src/client/spark/Orders/OrderTypeVMs/SpreaderOrderVM.cs

@@ -1,17 +1,15 @@
 using bts.api;
 using bts.api.orderman;
 using mbts.ui;
-using mbts.ui.controls;
 using System;
-using System.Collections.Generic;
 using System.Reactive.Linq;
 
 namespace mbts.spark {
    static partial class OrderTypeVMFactory {
       private class SpreaderOrderVM : OrderTypeVMBase<SpreaderOrderDefinition>, IOrderTypeVM, IDisposable {
          readonly Property<SpreaderOrderDefinitionImmutable?> _template;
-         readonly StrategyEditorWrapper _strategy_editor_wrapper;
          IDisposable _dispose;
+         SyntheticEditorVM _strategy_editor;
 
          public SpreaderOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source)
             : this(model, security_source, security_source.SelectMany(s => model.spreader.security_strategy(s.Id)
@@ -28,15 +26,15 @@ namespace mbts.spark {
             IObservable<InlineUserProperty<SpreaderOrderDefinitionImmutable>> order_template_source)
             : base(model) {
             _template = backing(nameof(template), new SpreaderOrderDefinitionImmutable?());
-            _strategy_editor_wrapper = new StrategyEditorWrapper(this);
             _dispose = Disposable.Create(
-               _strategy_editor_wrapper,
-               _template.OnDispatcher().Subscribe(vals => {
+               _template.ObserveOnDispatcher().Subscribe(vals => {
                   _validate();
                }),
-               order_template_source.OnDispatcher().Subscribe(prop => {
+               order_template_source.ObserveOnDispatcher().Subscribe(prop => {
                   if (prop.force_override || (!template.HasValue && prop.has_value)) {
                      _template.Value = prop.value;
+                     if (_strategy_editor != null)
+                        _strategy_editor.set_synthetic(prop.value.Security, prop.value.ExecutionStrategy);
                      _validate();
                   }
                })
@@ -45,14 +43,23 @@ namespace mbts.spark {
          }
 
          public SpreaderOrderDefinitionImmutable? template => _template.Value;
-         public SyntheticEditorVM strategy_editor => _strategy_editor_wrapper.vm;
-         public IEnumerable<DialogSkirtItem> skirt_items => _strategy_editor_wrapper.skirt_items;
+
+         public SyntheticEditorVM strategy_editor {
+            get {
+               if (_strategy_editor == null && template.HasValue) {
+                  var def = template.Value;
+                  _strategy_editor = new SyntheticEditorVM(model.spreader, def.Security, def.ExecutionStrategy, model.security_has_working_orders(def.Security.Id));
+               }
+               return _strategy_editor;
+            }
+         }
+
          public override bool editable_properties_open {
             get => base.editable_properties_open;
             set {
-               if (!value && template.HasValue && strategy_editor != null) {
+               if (!value && template.HasValue && _strategy_editor != null) {
                   var mutable_template = template.Value.CloneToMutable();
-                  mutable_template.ExecutionStrategy = _strategy_editor_wrapper.vm.get_strategy().CloneToMutable();
+                  mutable_template.ExecutionStrategy = _strategy_editor.get_strategy().CloneToMutable();
                   _template.Value = new SpreaderOrderDefinitionImmutable(mutable_template);
                }
                base.editable_properties_open = value;
@@ -73,39 +80,6 @@ namespace mbts.spark {
                set_error(nameof(template), "Waiting for security and/or strategy.", true);
             else clear_error(nameof(template));
          }
-
-         // lazily initializes SyntheticEditorVM and associated dialog skirt items
-         class StrategyEditorWrapper : IDisposable {
-            readonly SpreaderOrderVM _owner;
-            SyntheticEditorVM _vm;
-            DialogSkirtItem _save_strategy_item;
-
-            public StrategyEditorWrapper(SpreaderOrderVM owner) {
-               _owner = owner;
-               _owner._template.Changed += _order_template_changed;
-            }
-
-            public SyntheticEditorVM vm { get { _init(); return _vm; } }
-            public IEnumerable<DialogSkirtItem> skirt_items { get { _init(); yield return _save_strategy_item; } }
-
-            public void Dispose() {
-               Disposable.dispose(ref _vm);
-               _owner._template.Changed -= _order_template_changed;
-            }
-
-            void _init() {
-               if (_vm == null && _owner.template.HasValue) {
-                  var def = _owner.template.Value;
-                  _vm = new SyntheticEditorVM(_owner.model.spreader, def.Security, def.ExecutionStrategy, _owner.model.security_has_working_orders(def.Security.Id));
-                  _save_strategy_item = new DialogSkirtItem("Save Strategy", _vm.commit);
-               }
-            }
-
-            void _order_template_changed(SpreaderOrderDefinitionImmutable? oldval, SpreaderOrderDefinitionImmutable? newval) {
-               if (_vm != null && newval.HasValue)
-                  _vm.set_synthetic(newval.Value.Security, newval.Value.ExecutionStrategy);
-            }
-         }
       }
    }
 }

src/client/spark/Orders/OrderTypeVMs/TickOrderVM.cs

@@ -1,201 +0,0 @@
-using bts.api;
-using bts.api.orderman;
-using mbts.ui;
-using mbts.ui.utility;
-using mbts.utils;
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.ComponentModel;
-using System.Linq;
-using System.Reactive.Linq;
-using static bts.api.orderman.CustomOrderDefinition;
-
-namespace mbts.spark 
-{
-   static partial class OrderTypeVMFactory 
-   {
-      class InlineTickOrderProperties 
-      {
-         public InlineTickOrderProperties (CustomOneofCase selected_child_order_type, IReadOnlyCollection<CustomOneofCase> child_order_types) 
-         {
-            ExceptionAssert.InvalidOperation.That(child_order_types.Contains(selected_child_order_type), $"Child order type {selected_child_order_type} is not in child_order_types");
-            this.selected_child_order_type = new InlineUserProperty<CustomOneofCase>(selected_child_order_type, true);
-            this.child_order_types = new InlineUserProperty<IReadOnlyCollection<CustomOneofCase>>(child_order_types, true);
-            tick_offset_on_deploy = new InlineUserProperty<uint>(0, false);
-            cross_threshold = new InlineUserProperty<bts.spark.QuantityMeasure>(
-                              new bts.spark.QuantityMeasure() { Ratio = 1.0,  Absolute = 1}, false);
-            cross_ticks = new InlineUserProperty<uint>(0, false);
-            max_chase_ticks = new InlineUserProperty<uint>(10, false);
-            detach_on_toward = new InlineUserProperty<bool>(true, false);
-         }
-         public readonly InlineUserProperty<CustomOneofCase> selected_child_order_type;
-         public readonly InlineUserProperty<IReadOnlyCollection<CustomOneofCase>> child_order_types;
-         
-         public readonly InlineUserProperty<uint> tick_offset_on_deploy;
-         public readonly InlineUserProperty<bts.spark.QuantityMeasure> cross_threshold;
-         public readonly InlineUserProperty<uint> cross_ticks;
-         public readonly InlineUserProperty<uint> max_chase_ticks;
-         public readonly InlineUserProperty<bool> detach_on_toward;
-      }
-
-      class TickOrderVM : OrderTypeVMBase<TickOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable 
-      {
-         readonly IObservable<SecurityImmutable> _security_source;
-         SecurityImmutable? _security;
-         ObservableCollection<CustomOneofCase> _order_types = new ObservableCollection<CustomOneofCase>();
-         ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase> _child_order_choices;
-         InlineTickOrderProperties _inline_props;
-         IOrderTypeVM _child_order;
-         IDisposable _dispose, _child_order_errors_sub;
-         
-         public uint tick_offset_on_deploy { get; set; } = 0;
-         public bts.spark.QuantityMeasure cross_threshold { get; set; } = new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1 };
-         public uint cross_ticks { get; set; } = 0;
-         public uint max_chase_ticks { get; set; } = 10;
-         public bool detach_on_toward { get; set; } = true;         
-
-         public TickOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source)
-            : this(model, security_source, security_source.Select(s =>
-            new InlineTickOrderProperties(model.factory.default_order_type(s), model.factory.default_order_types(s).ToList()))) { }
-
-         public TickOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source,
-                            IObservable<InlineTickOrderProperties> inline_properties) : base(model) 
-         {
-            _security_source = security_source;
-            _dispose = Disposable.Create(
-               security_source.OnDispatcher()
-               .Subscribe(s => _security = s),
-               inline_properties.OnDispatcher()
-               .Subscribe(p => {
-                  if (_order_types.Count == 0 || p.child_order_types.force_override) 
-                  {
-                     _order_types.SetItems(p.child_order_types.value);
-                  }
-                  if (_child_order_choices != null && (_child_order == null || p.selected_child_order_type.force_override)) 
-                  {
-                     _select_child_order(p.selected_child_order_type.value);
-                  }                  
-                  if (p.tick_offset_on_deploy.force_override) 
-                  {
-                     tick_offset_on_deploy = p.tick_offset_on_deploy.value;
-                     RaisePropertyChanged(nameof(tick_offset_on_deploy));
-                  }
-                  if (p.cross_threshold.force_override)
-                  {
-                     cross_threshold = p.cross_threshold.value;
-                     RaisePropertyChanged(nameof(cross_threshold));
-                  }
-                  if (p.cross_ticks.force_override)
-                  {
-                     cross_ticks = p.cross_ticks.value;
-                     RaisePropertyChanged(nameof(cross_ticks));
-                  }
-                  if (p.max_chase_ticks.force_override)
-                  {
-                     max_chase_ticks = p.max_chase_ticks.value;
-                     RaisePropertyChanged(nameof(max_chase_ticks));
-                  }
-                  if (p.detach_on_toward.force_override)
-                  {
-                     detach_on_toward = p.detach_on_toward.value;
-                     RaisePropertyChanged(nameof(detach_on_toward));
-                  }                                                                        
-                  _inline_props = p;
-                  _validate();
-               })
-            );
-            _validate();
-         }
-         
-         public override void assign_to(CustomOrderDefinition value) 
-         {
-            if (_child_order == null)
-               _select_child_order(model.factory.default_order_type(_security.Value, true));
-            _validate();
-            if (!HasErrors) 
-            {
-               var i = factory.tick_order();
-               i.TickOffsetOnDeploy = tick_offset_on_deploy;
-               i.CrossThreshold = cross_threshold;
-               i.CrossTicks = cross_ticks;
-               i.MaxChaseTicks = max_chase_ticks;
-               i.DetachOnToward = detach_on_toward;
-               child_order.assign_to(i.Child);
-               value.Tick = i;
-            }
-         }         
-
-         public ICollection<IOrderTypeVM> child_order_types 
-         {
-            get 
-            {
-               if (_child_order_choices == null) 
-                  _child_order_choices = new ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase>(_order_types, ot => create(ot, model, _security_source));
-               return _child_order_choices;
-            }
-         }
- 
-         public IOrderTypeVM child_order 
-         {
-            get 
-            {
-               init();
-               return _child_order;
-            }
-            set 
-            {
-               Disposable.dispose(ref _child_order_errors_sub);
-               _child_order = value;
-               _child_order?.init();
-               if (_child_order is INotifyDataErrorInfo ndei) 
-               {
-                  ndei.ErrorsChanged += on_errors_changed;
-                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
-                     _validate();
-                  _child_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
-               }
-               _validate();
-               RaisePropertyChanged(nameof(child_order));
-            }
-         }         
-
-         public void Dispose() 
-         {
-            Disposable.dispose(ref _dispose);
-            if (_child_order_choices != null)
-               _child_order_choices.OfType<IDisposable>().DisposeAll();
-         }
-
-         public override void init() 
-         {
-            if (_child_order == null && _security.HasValue)
-               _select_child_order();
-            _validate();
-         }
-
-         void _select_child_order() 
-         {
-            CustomOneofCase ot = _inline_props != null && _inline_props.selected_child_order_type.has_value ?
-               _inline_props.selected_child_order_type.value :
-               model.factory.default_order_type(_security.Value, true);
-            _select_child_order(ot);
-         }
-
-         void _select_child_order(CustomOneofCase ot) 
-         {
-            _child_order = child_order_types.FirstOrDefault(vm => vm.order_type == ot);
-            if (_child_order == null)
-               _child_order = child_order_types.FirstOrDefault();
-            RaisePropertyChanged(nameof(child_order));
-         }
-
-         void _validate() 
-         {
-            if (_child_order == null || (_child_order is INotifyDataErrorInfo ndei && ndei.HasErrors))
-               set_error(nameof(child_order), string.Empty, true);
-            else clear_error(nameof(child_order));
-         }
-      }
-   }
-}

src/client/spark/Orders/OrderTypeVMs/TimeBoxOrderVM.cs

@@ -50,9 +50,9 @@ namespace mbts.spark {
             : base(model) {
             _security_source = security_source;
             _dispose = Disposable.Create(
-               security_source.OnDispatcher()
+               security_source.ObserveOnDispatcher()
                .Subscribe(s => _security = s),
-               inline_properties.OnDispatcher()
+               inline_properties.ObserveOnDispatcher()
                .Subscribe(p => {
                   if (_order_types.Count == 0 || p.child_order_types.force_override) {
                      _order_types.SetItems(p.child_order_types.value);

src/client/spark/Orders/OrderTypeVMs/TopOrderVM.cs

@@ -1,287 +0,0 @@
-using bts.api;
-using bts.api.orderman;
-using mbts.ui;
-using mbts.ui.utility;
-using mbts.utils;
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.ComponentModel;
-using System.Linq;
-using System.Reactive.Linq;
-using static bts.api.orderman.CustomOrderDefinition;
-
-namespace mbts.spark
-{
-   static partial class OrderTypeVMFactory
-   {
-      class InlineTopOrderProperties
-      {
-         public InlineTopOrderProperties(CustomOneofCase selected_child_order_type, IReadOnlyCollection<CustomOneofCase> child_order_types)
-         {
-            ExceptionAssert.InvalidOperation.That(child_order_types.Contains(selected_child_order_type), $"Child order type {selected_child_order_type} is not in child_order_types");
-            this.selected_child_order_type = new InlineUserProperty<CustomOneofCase>(selected_child_order_type, true);
-            this.child_order_types = new InlineUserProperty<IReadOnlyCollection<CustomOneofCase>>(child_order_types, true);
-
-            var hedgetype = CustomOneofCase.Lean;
-            if(!child_order_types.Contains(hedgetype))
-               hedgetype = CustomOneofCase.Limit;
-            this.selected_hedge_order_type = new InlineUserProperty<CustomOneofCase>(hedgetype, true);
-            this.hedge_order_types = new InlineUserProperty<IReadOnlyCollection<CustomOneofCase>>(child_order_types, true);
-
-            watch_level_tick_offset = new InlineUserProperty<uint>(0, false);
-            top_threshold = new InlineUserProperty<bts.spark.QuantityMeasure>(
-                              new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1 }, false);
-            enable_hedge = new InlineUserProperty<bool>(false, false);
-            hedge_ticks = new InlineUserProperty<int>(1, false);
-         }
-         public readonly InlineUserProperty<CustomOneofCase> selected_child_order_type;
-         public readonly InlineUserProperty<IReadOnlyCollection<CustomOneofCase>> child_order_types;
-         public readonly InlineUserProperty<CustomOneofCase> selected_hedge_order_type;
-         public readonly InlineUserProperty<IReadOnlyCollection<CustomOneofCase>> hedge_order_types;
-
-
-         public readonly InlineUserProperty<uint> watch_level_tick_offset;
-         public readonly InlineUserProperty<bts.spark.QuantityMeasure> top_threshold;
-
-         public readonly InlineUserProperty<bool> enable_hedge;
-         public readonly InlineUserProperty<int> hedge_ticks;
-
-      }
-
-      class TopOrderVM : OrderTypeVMBase<TopOrderDefinition>, IHierarchicalOrderTypeVM, IDisposable
-      {
-         readonly IObservable<SecurityImmutable> _security_source;
-         SecurityImmutable? _security;
-         ObservableCollection<CustomOneofCase> _order_types = new ObservableCollection<CustomOneofCase>();
-         ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase> _child_order_choices;
-         InlineTopOrderProperties _inline_props;
-         IOrderTypeVM _child_order;
-         IDisposable _dispose, _child_order_errors_sub;
-
-         ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase> _hedge_order_choices;
-         IOrderTypeVM _hedge_order;
-         IDisposable _hedge_order_errors_sub;
-
-         public uint watch_level_tick_offset { get; set; } = 0;
-         public bts.spark.QuantityMeasure top_threshold { get; set; } = new bts.spark.QuantityMeasure() { Ratio = 1.0, Absolute = 1 };
-         bool _enable_hedge = false;
-         public bool enable_hedge
-         {
-            get { return _enable_hedge; }
-            set
-            {
-               _enable_hedge = value;
-               RaisePropertyChanged(nameof(enable_hedge));
-            }
-         }
-         public int hedge_ticks { get; set; } = 1;
-
-         public TopOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source)
-            : this(model, security_source, security_source.Select(s =>
-            new InlineTopOrderProperties(model.factory.default_order_type(s), model.factory.default_order_types(s).ToList())))
-         { }
-
-         public TopOrderVM(OrdersModel model, IObservable<SecurityImmutable> security_source,
-                            IObservable<InlineTopOrderProperties> inline_properties) : base(model)
-         {
-            _security_source = security_source;
-            _dispose = Disposable.Create(
-               security_source.OnDispatcher()
-               .Subscribe(s => _security = s),
-               inline_properties.OnDispatcher()
-               .Subscribe(p =>
-               {
-                  if (_order_types.Count == 0 || p.child_order_types.force_override)
-                  {
-                     _order_types.SetItems(p.child_order_types.value);
-                  }
-                  if (_child_order_choices != null && (_child_order == null || p.selected_child_order_type.force_override))
-                  {
-                     _select_child_order(p.selected_child_order_type.value);
-                  }
-                  if (_hedge_order_choices != null && (_hedge_order == null || p.selected_hedge_order_type.force_override))
-                  {
-                     _select_hedge_order(p.selected_hedge_order_type.value);
-                  }
-                  if (p.watch_level_tick_offset.force_override)
-                  {
-                     watch_level_tick_offset = p.watch_level_tick_offset.value;
-                     RaisePropertyChanged(nameof(watch_level_tick_offset));
-                  }
-                  if (p.top_threshold.force_override)
-                  {
-                     top_threshold = p.top_threshold.value;
-                     RaisePropertyChanged(nameof(top_threshold));
-                  }
-                  if (p.enable_hedge.force_override)
-                  {
-                     enable_hedge = p.enable_hedge.value;
-                     RaisePropertyChanged(nameof(enable_hedge));
-                  }
-                  if (p.hedge_ticks.force_override)
-                  {
-                     hedge_ticks = p.hedge_ticks.value;
-                     RaisePropertyChanged(nameof(hedge_ticks));
-                  }
-                  _inline_props = p;
-                  _validate();
-               })
-            );
-            _validate();
-         }
-
-         public override void assign_to(CustomOrderDefinition value)
-         {
-            if (_child_order == null)
-               _select_child_order(model.factory.default_order_type(_security.Value, true));
-            if (_hedge_order == null && enable_hedge)
-               _select_hedge_order(model.factory.default_order_type(_security.Value, true));
-            _validate();
-            if (!HasErrors)
-            {
-               var i = factory.top_order();
-               i.WatchLevelTickOffset = watch_level_tick_offset;
-               i.TopThreshold = top_threshold;
-               i.EnableHedge = enable_hedge;
-               i.HedgeTicks = hedge_ticks;
-               child_order.assign_to(i.Child);
-               if (enable_hedge && hedge_order != null)
-                  hedge_order.assign_to(i.Hedge);
-               value.Top = i;
-            }
-         }
-
-         public ICollection<IOrderTypeVM> child_order_types
-         {
-            get
-            {
-               if (_child_order_choices == null)
-                  _child_order_choices = new ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase>(_order_types, ot => create(ot, model, _security_source));
-               return _child_order_choices;
-            }
-         }
-
-         public ICollection<IOrderTypeVM> hedge_order_types
-         {
-            get
-            {
-               if (_hedge_order_choices == null)
-                  _hedge_order_choices = new ObservableAutoWrapper<IOrderTypeVM, CustomOneofCase>(_order_types, ot => create(ot, model, _security_source));
-               return _hedge_order_choices;
-            }
-         }
-
-         public IOrderTypeVM child_order
-         {
-            get
-            {
-               init();
-               return _child_order;
-            }
-            set
-            {
-               Disposable.dispose(ref _child_order_errors_sub);
-               _child_order = value;
-               _child_order?.init();
-               if (_child_order is INotifyDataErrorInfo ndei)
-               {
-                  ndei.ErrorsChanged += on_errors_changed;
-                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
-                     _validate();
-                  _child_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
-               }
-               _validate();
-               RaisePropertyChanged(nameof(child_order));
-            }
-         }
-
-         public IOrderTypeVM hedge_order
-         {
-            get
-            {
-               init();
-               return _hedge_order;
-            }
-            set
-            {
-               Disposable.dispose(ref _hedge_order_errors_sub);
-               _hedge_order = value;
-               _hedge_order?.init();
-               if (_hedge_order is INotifyDataErrorInfo ndei)
-               {
-                  ndei.ErrorsChanged += on_errors_changed;
-                  void on_errors_changed(object s, DataErrorsChangedEventArgs e) =>
-                     _validate();
-                  _hedge_order_errors_sub = Disposable.Create(() => ndei.ErrorsChanged -= on_errors_changed);
-               }
-               _validate();
-               RaisePropertyChanged(nameof(hedge_order));
-            }
-         }
-
-         public void Dispose()
-         {
-            Disposable.dispose(ref _dispose);
-            if (_child_order_choices != null)
-               _child_order_choices.OfType<IDisposable>().DisposeAll();
-            if (_hedge_order_choices != null)
-               _hedge_order_choices.OfType<IDisposable>().DisposeAll();
-         }
-
-         public override void init()
-         {
-            if (_child_order == null && _security.HasValue)
-               _select_child_order();
-            if (_hedge_order == null && _security.HasValue && enable_hedge)
-               _select_hedge_order();
-            _validate();
-         }
-
-         void _select_child_order()
-         {
-            CustomOneofCase ot = _inline_props != null && _inline_props.selected_child_order_type.has_value ?
-               _inline_props.selected_child_order_type.value :
-               model.factory.default_order_type(_security.Value, true);
-            _select_child_order(ot);
-         }
-
-         void _select_child_order(CustomOneofCase ot)
-         {
-            _child_order = child_order_types.FirstOrDefault(vm => vm.order_type == ot);
-            if (_child_order == null)
-               _child_order = child_order_types.FirstOrDefault();
-            RaisePropertyChanged(nameof(child_order));
-         }
-
-         void _select_hedge_order()
-         {
-            CustomOneofCase ot = _inline_props != null && _inline_props.selected_hedge_order_type.has_value ?
-               _inline_props.selected_hedge_order_type.value :
-               model.factory.default_order_type(_security.Value, true);
-            _select_hedge_order(ot);
-         }
-
-         void _select_hedge_order(CustomOneofCase ot)
-         {
-            _hedge_order = hedge_order_types.FirstOrDefault(vm => vm.order_type == ot);
-            if (_hedge_order == null)
-               _hedge_order = hedge_order_types.FirstOrDefault();
-            RaisePropertyChanged(nameof(hedge_order));
-         }
-
-
-         void _validate()
-         {
-            if (_child_order == null || (_child_order is INotifyDataErrorInfo ndei && ndei.HasErrors))
-               set_error(nameof(child_order), string.Empty, true);
-            else clear_error(nameof(child_order));
-
-            if ((_hedge_order == null && enable_hedge) || (_hedge_order is INotifyDataErrorInfo hdei && hdei.HasErrors))
-               set_error(nameof(hedge_order), string.Empty, true);
-            else clear_error(nameof(hedge_order));
-
-         }
-      }
-   }
-}

src/client/spark/Orders/OrdersModel.cs

@@ -31,11 +31,11 @@ namespace mbts.spark {
          _service = service;
          _spreader = spreader;
          _error = error;
-         on_orders = _service.subscribei_orders().Table().Cache();
+         on_orders = _service.subscribei_orders().Table().Replay(1).RefCount();
          IReadOnlyDictionary<uint, OrderRecordImmutable> empty_orders = new Dictionary<uint, OrderRecordImmutable>();
          working_orders = 
             on_orders.Scan(empty_orders, (worders, table) => _update_working_orders(worders, table)).Replay(1).RefCount();
-         on_fills = _service.subscribei_fills().Table().Cache();
+         on_fills = _service.subscribei_fills().Table().Replay(1).RefCount();
          _activity = new OrderActivitySummarizer(bus, on_orders);
          on_fill_tuples = FillTupleSource.create_observable(bus.subscribe(SparkTags.SecuritiesTag), on_orders, on_fills);
          _security_orders_demuxer = new TableUpdateDemuxer<OrderRecordImmutable, uint, uint>(o => o.Key, o => o.security_key());
@@ -53,7 +53,7 @@ namespace mbts.spark {
       public SpreaderModel spreader => _spreader;
       public IObservable<TableUpdate<OrderRecordImmutable, uint>> on_orders { get; }
       public IObservable<TableUpdate<FillImmutable, string>> on_fills { get; }
-      public IObservable<IIncrementalUpdate<FillTuple, FillTupleKey>> on_fill_tuples { get; }
+      public IObservable<ITableUpdateTransform<FillTuple, string>> on_fill_tuples { get; }
       public IObservable<IReadOnlyDictionary<uint,OrderRecordImmutable>> working_orders { get; }
 
       public IObservable<ITableUpdateTransform<OrderRecordImmutable, uint>> on_security_orders(uint security) =>

src/client/spark/Tests/ViewTests/WindowManagementTests.cs

@@ -75,7 +75,7 @@ namespace mbts.ui.tests
             Logger.log(bts.log.Level.Info, bts.log.Subsystem.Ui, "Begin: test_windows_disposed");
             // Make sure that an IShellWindow and ISlowWindow added to the Windows collection is eventually disposed
             var thread_factory = new ShellThreadFactory();
-            IWindowManager wm = new WindowManager(thread_factory, new Lazy<ISettingsCollector>(() => new TestSettingsCollector()), new TestSavedWindowFactory(), null, new SimpleBus());
+            IWindowManager wm = new WindowManager(thread_factory, new Lazy<ISettingsCollector>(() => new TestSettingsCollector()), new TestSavedWindowFactory(), new TestUndo(), new SimpleBus());
             Assert.IsNotNull(Application.Current);
             Assert.IsNotNull(Application.Current.Windows);
             Assert.AreEqual(Application.Current.Windows.Count, 0);
@@ -100,7 +100,7 @@ namespace mbts.ui.tests
             Logger.log(bts.log.Level.Info, bts.log.Subsystem.Ui, "Begin: test_slow_windows_disposed");
             // Make sure that an IShellWindow and ISlowWindow added to the Windows collection is eventually disposed
             var thread_factory = new ShellThreadFactory();
-            IWindowManager wm = new WindowManager(thread_factory, new Lazy<ISettingsCollector>(() => new TestSettingsCollector()), new TestSavedWindowFactory(), null, new SimpleBus());
+            IWindowManager wm = new WindowManager(thread_factory, new Lazy<ISettingsCollector>(() => new TestSettingsCollector()), new TestSavedWindowFactory(), new TestUndo(), new SimpleBus());
             Assert.AreEqual(Application.Current.Windows.Count, 0);
 
             // an ISlowWindow gets its own thread

src/client/spark/core/Bus/SparkCommand.cs

@@ -175,8 +175,8 @@ namespace bts.spark
       public SparkCommandParamObserver(string title, ImageSource icon, ITag<T> tag, IObservable<T> parameter, IObservable<bool> can_execute) : base(title, icon) {
          _tag = tag;
          _subs = Disposable.Create(
-            parameter.OnDispatcher().Subscribe(p => _parameter = p),
-            can_execute.OnDispatcher().Subscribe(ce => {
+            parameter.ObserveOnDispatcher().Subscribe(p => _parameter = p),
+            can_execute.ObserveOnDispatcher().Subscribe(ce => {
                _can_execute = ce;
                raiseCanExecuteChanged();
             })

src/client/spark/core/Bus/SparkTags.cs

@@ -5,7 +5,6 @@ using bts.spark;
 using mbts.ui;
 using System;
 using System.Collections.Generic;
-using System.Threading.Tasks;
 using static mbts.spark.SparkBusData;
 
 namespace mbts.spark
@@ -35,8 +34,6 @@ namespace mbts.spark
       public static ITag<(PartialCommand<SecurityMD>, SecurityCriteria)> FilterPickOne { get; } = new SparkTag<(PartialCommand<SecurityMD>, SecurityCriteria)>("FilterPick1");
 
       public static ITag<IShellWindow> ShowWindow { get; } = new SparkTag<IShellWindow>("Show Window");
-      public static ITag<Task<IShellWindow>> ShowWindowAsync { get; } = new SparkTag<Task<IShellWindow>>("ShowWindowAsync");
-      public static ITag<IShellWindow> ActivateWindow { get; } = new SparkTag<IShellWindow>("Activate Window");
       public static ITag<Nothing> ShowWorkspaces { get; } = new SparkTag<Nothing>(nameof(ShowWorkspaces));
       public static ITag<Nothing> ShowSettings { get; } = new SparkTag<Nothing>(nameof(ShowSettings));
       public static ITag<Uri> ShowUri { get; } = new SparkTag<Uri>("ShowUri");

src/client/spark/core/FontsAndColors/BTSColors.cs

@@ -199,10 +199,10 @@ namespace mbts.ui {
          public static BTSColor straddle_theovsmarket_positive { get { return BTSCoreColors.green_light; } }
 
          // Order Types
-         public static BTSColor tick_order { get { return BTSColors.purple.rgb_color();}}
-         public static BTSColor lean_order { get { return BTSColors.purple.rgb_color();}}
-         public static BTSColor join_order { get { return BTSColors.purple.rgb_color();}}
-         public static BTSColor top_order { get { return BTSColors.purple.rgb_color();}}
+         public static BTSColor tick_order { get { return new BTSColor(31, 4, 57);}}
+         public static BTSColor lean_order { get { return new BTSColor(110, 77, 143);}}
+         public static BTSColor join_order { get { return new BTSColor(15, 1, 29);}}
+         public static BTSColor leader_order { get { return new BTSColor(40, 9, 72);}}
       }
 
       public static class AW2 {

src/client/spark/core/GlobalExtensions/GenericCollectionExtensions.cs

@@ -48,10 +48,10 @@ namespace System.Collections.Generic {
          return rv;
       }
 
-      // use "new [] { item }" - avoid putting this on the intellisense for every item everywhere
-      //public static IEnumerable<T> ToIEnumerable<T>(this T item) {
-      //   yield return item;
-      //}
+
+      public static IEnumerable<T> ToIEnumerable<T>(this T item) {
+         yield return item;
+      }
 
       public static IEnumerable<T> TakeWhile<T, TAccumulate>(this IEnumerable<T> source, TAccumulate seed, Func<TAccumulate, T, TAccumulate> accumulate, Func<TAccumulate, T, bool> predicate) {
          TAccumulate a = seed;

src/client/spark/core/GlobalExtensions/GlobalExtensions.cs

@@ -345,17 +345,6 @@ namespace System.Reactive.Linq
 
       public static async Task<(TResult result, bool success)> FirstAsyncTask<T, TResult>(this IObservable<T> source, Func<T, bool> predicate, Func<T, TResult> selector, TimeSpan timeout) where T : class =>
          await source.Where(predicate).Select(val => (selector(val), true)).Merge(Observable.Return((default(TResult), false)).Delay(timeout)).FirstAsync();
-
-      // This is placed here to intentionally make ObserveOnDispatcher ambiguous with the one provided by Rx
-      public static IObservable<T> ObserveOnDispatcher<T>(this IObservable<T> source) {
-         throw new InvalidOperationException("This method can starve the UI of input messages. Please use OnDispatcher() instead");
-      }
-
-      public static IObservable<T> OnDispatcher<T>(this IObservable<T> source) {
-         return DispatcherObservable.ObserveOnDispatcher(source, DispatcherPriority.Background);
-      }
-
-
    }
 }
 

src/client/spark/core/GlobalExtensions/ObjectHelper.cs

@@ -54,33 +54,5 @@
          rv |= try_convert(args[1], out arg2);
          return rv;
       }
-
-      public static bool try_convert_args<T1, T2, T3>(object[] args, out T1 arg1, out T2 arg2, out T3 arg3) {
-         if (args == null || args.Length != 3) {
-            arg1 = default;
-            arg2 = default;
-            arg3 = default;
-            return false;
-         }
-         bool rv = try_convert(args[0], out arg1);
-         rv |= try_convert(args[1], out arg2);
-         rv |= try_convert(args[2], out arg3);
-         return rv;
-      }
-
-      public static bool try_convert_args<T1, T2, T3, T4>(object[] args, out T1 arg1, out T2 arg2, out T3 arg3, out T4 arg4) {
-         if (args == null || args.Length != 4) {
-            arg1 = default;
-            arg2 = default;
-            arg3 = default;
-            arg4 = default;
-            return false;
-         }
-         bool rv = try_convert(args[0], out arg1);
-         rv |= try_convert(args[1], out arg2);
-         rv |= try_convert(args[2], out arg3);
-         rv |= try_convert(args[3], out arg4);
-         return rv;
-      }
    }
 }

src/client/spark/core/GlobalExtensions/TickExtensions.cs

@@ -17,10 +17,8 @@ namespace mbts {
       public static double tick_unit_frac(this TickFactors tick) =>
          tick.tick_unit / tick.tick_base;
 
-      public static double reduced_base(this TickFactors tick) => factor_out(tick.tick_base, 10);
-
       public static string format(this TickFactors tick, double value) =>
-         format(tick, value, double.NaN, false, _nan_text);
+         format(tick, value, double.NaN, true, _nan_text);
 
       public static string format(this TickFactors tick, double value, bool show_commas) =>
          format(tick, value, double.NaN, show_commas, _nan_text);
@@ -178,10 +176,9 @@ namespace mbts {
          if (DoubleHelper.IsNaNOrInfinity(input)) return input;
          return input <= regional_tick.low_tick_inclusive_end ? regional_tick.low_tick.round(input) : regional_tick.high_tick.round(input);
       }
-      public static int display_digits(this TickFactors tick) => display_digits(tick.tick_base);
       #endregion
 
-      public static int display_digits(double tick_base) {
+      public static int n_display_digits(double tick_base) {
          double log_tick_base = Math.Log10(tick_base);
          int floor = (int)Math.Floor(log_tick_base);
          double dec = log_tick_base - floor;
@@ -219,7 +216,7 @@ namespace mbts {
          if (numerator_part >= tick_base) numerator_part /= Math.Pow(10, Math.Ceiling(Math.Log10(numerator_part) - Math.Log10(tick_base)));
          else {
             //e.g [tick_base 640] 1989-8 == 1989-80, or 1989-32 == 1989-320
-            int ndd_diff = display_digits(tick_base) - numerator_text.Length;
+            int ndd_diff = n_display_digits(tick_base) - numerator_text.Length;
             if (ndd_diff > 0) numerator_part *= Math.Pow(10, ndd_diff);
             if (numerator_part >= tick_base) numerator_part /= 10;
          }
@@ -258,21 +255,16 @@ namespace mbts {
                double numerator_dec = value - integer_part;
                double unit_frac = tick.tick_unit / tick.tick_base;
                int n_units = (int)Math.Round(numerator_dec / unit_frac);
-               if (n_units == tick.tick_base) return (integer_part + 1).ToString() + tick.separator() + new string('0', display_digits(tick.tick_base));
+               if (n_units == tick.tick_base) return (integer_part + 1).ToString() + tick.separator() + new string('0', n_display_digits(tick.tick_base));
                double decimal_part = n_units * tick.tick_unit;
                if (decimal_part == tick.tick_base) {
                   ++integer_part;
                   decimal_part = 0;
-               } else {
-                  // some ticks are not formatted with 100% precision, using less than the required display_digits
-                  // for such cases, we need to truncate the decimal part rather than round it.
-                  decimal_part = Math.Floor(decimal_part);
                }
                string integer_part_text = show_commas ? integer_part.ToString("#,0") : integer_part.ToString();
-               return integer_part_text + tick.separator() + decimal_part.ToString(new string('0', display_digits(tick.tick_base)));
+               return integer_part_text + tick.separator() + decimal_part.ToString(new string('0', n_display_digits(tick.tick_base)));
             }
-         }
-         catch (OverflowException ex) {
+         } catch (OverflowException ex) {
             Logger.warn(bts.log.Subsystem.Ui, $"Arithmetic overflow exception in format_tick (tick:{tick}, value:{value}):{ex}");
             return "Overflow";
          }
@@ -280,7 +272,7 @@ namespace mbts {
 
       private static double _round_tick(double tick_unit_frac, double input) {
          return input - Math.IEEERemainder(input, tick_unit_frac);
-      }
+      } 
       #endregion
    }
 }

src/client/spark/core/Settings/ISettingsCollector.cs

@@ -69,18 +69,16 @@ namespace mbts.ui.settings
             if (window == null || window.Owner == null) return null;
             MemoryStream out_stream = new MemoryStream();
             window.GetState(out_stream);
-
-            var pos = _interop.GetPosition(window);
             var state = new WindowState() {
                owner = window.Owner.key(),
                app_data = out_stream.ToArray(),
-               position = pos,
-               title = string.IsNullOrEmpty(pos.custom_title) ? window.Title : pos.custom_title
+               position = _interop.GetPosition(window),
+               title = window.Title
             };
             return state;
          }
          catch (Exception e) {
-            Logger.log(Level.Error, Subsystem.Ui, "Error saving window state for type {0}.\n {1}".fmt(window.GetType(), e.Message));
+            Logger.log(bts.log.Level.Error, bts.log.Subsystem.Ui, "Error saving window state for type {0}.\n {1}".fmt(window.GetType(), e.Message));
          }
          return null;
       }

src/client/spark/core/Settings/UserPersistFactory.cs

@@ -12,9 +12,6 @@ using bts.api.persistence;
 
 namespace mbts.ui.settings
 {
-   //
-   // This class is used for tools like SettingsManager.exe
-   // 
    [Export(typeof(IUserPersistFactory))]
    class UISettingsFactory : IUserPersistFactory
    {
@@ -37,7 +34,7 @@ namespace mbts.ui.settings
 
       public IUserPersist get_persist_for(string name) {
          var user = _users.Result.FirstOrDefault(u => u.Login == name);
-         return new UserUISettings(user.Id, _persist, null);
+         return new UserUISettings(user.Id, _persist);
       }
    }
 }

src/client/spark/core/Settings/Workspaces/WorkspaceProtos.cs

@@ -39,9 +39,6 @@ namespace mbts.ui.shell {
       [ProtoMember(102), DefaultValue(true)]
       public bool always_on_top = true;
       //[ProtoMember(103)] //used
-
-      [ProtoMember(104)]
-      public string custom_title;
    }
 
    [ProtoContract]
@@ -61,7 +58,7 @@ namespace mbts.ui.shell {
       public WindowPosition position;
 
       [ProtoMember(9)]
-      public string title; // for debugging
+      public string title;
    }
 
    [ProtoContract]

src/client/spark/core/ShellInterface/IShellModule.cs

@@ -23,9 +23,6 @@ namespace mbts.ui
       Task<IShellWindow> create(Stream load_stream);
    }
 
-   // ILazyModule may also impement IShellMenu to get opening/closing notification
-   public interface ILazyMenuModule : IShellModule { }
-
    public interface IPersistShellModule : IShellModule {
       // Called at startup before the UI is shown
       // This is an opportunity for you to kick off background services

src/client/spark/core/ShellInterface/IWindowsInterop.cs

@@ -17,5 +17,5 @@ namespace mbts.ui
       WindowPosition GetPosition(IShellWindow window);
       bool IsVisible(IShellWindow window);
       void PinWindow(IShellWindow window);
-  }
+   }
 }

src/client/spark/core/ShellInterface/UISettings.cs

@@ -10,7 +10,6 @@ using bts.api.core;
 using bts.api.persistence;
 using System.Text.RegularExpressions;
 using System.Reactive.Linq;
-using bts.spark;
 
 namespace mbts.persist
 {
@@ -19,13 +18,11 @@ namespace mbts.persist
       protected abstract string user();
       string uns(string ns) { return $"{user()}#{ns}"; }
       PersistenceService _persist;
-      ErrorReporter _errors;   
 
       private const string _settings_change_base = "/ui/settingschange/";
 
-      public UISettingsBase(PersistenceService persist, ErrorReporter errors) {
+      public UISettingsBase(PersistenceService persist) {
          _persist = persist;
-         _errors = errors;
       }
 
 
@@ -53,7 +50,7 @@ namespace mbts.persist
             Ns = uns(ns),
             Key = { key }
          });
-         check_error(ret, ns, key, out bool empty);
+         check_error(ret.value.Result, ns, key, out bool empty);
          if (empty) return default(T);
          return deserialize<T>(ret.value.Record.Single().Value);
       }
@@ -70,28 +67,20 @@ namespace mbts.persist
          return ProtoBuf.Serializer.DeserializeWithLengthPrefix<T>(stream, ProtoBuf.PrefixStyle.Fixed32);
       }
 
-      private void check_error(Result<RetrieveResponse> result, string ns, string key, out bool empty) {
-         if (result.success) {
-            switch (result.value.Result) {
-               case RetrieveResponse.Types.Result.EmptyNs:
-               case RetrieveResponse.Types.Result.NoSuchNs:
-               case RetrieveResponse.Types.Result.NoSuchKey:
-                  empty = true;
-                  return;
-               case RetrieveResponse.Types.Result.EmptyKey:
-               case RetrieveResponse.Types.Result.DuplicateKey:
-                  _errors?.report_error($"Invalid Key {result} '{key}'", "Requested Invalid Settings Key", System.Windows.MessageBoxImage.Information);
-                  empty = true;
-                  return;
-               default:
-               case RetrieveResponse.Types.Result.Ok:
-                  empty = false;
-                  return;
-            }
-         }
-         else {
-            _errors?.report_error($"There was an error communicating with the settings server: '{result.error_message}'", "Failed to retrieve settings from the server");
-            empty = true;
+      private void check_error(RetrieveResponse.Types.Result result, string ns, string key, out bool empty) {
+         switch (result) {
+            case RetrieveResponse.Types.Result.EmptyNs:
+            case RetrieveResponse.Types.Result.NoSuchNs:
+            case RetrieveResponse.Types.Result.NoSuchKey:
+               empty = true;
+               return;
+            case RetrieveResponse.Types.Result.EmptyKey:
+            case RetrieveResponse.Types.Result.DuplicateKey:
+               throw new ArgumentException($"Invalid Key {result} '{key}'");
+            default:
+            case RetrieveResponse.Types.Result.Ok:
+               empty = false;
+               return;
          }
       }
 
@@ -101,7 +90,7 @@ namespace mbts.persist
             new RetrieveAllRequest() {
                Ns = uns(ns)
             });
-         check_error(results, ns, "", out bool empty);
+         check_error(results.value.Result, ns, "", out bool empty);
          if (empty) return Enumerable.Empty<PersistResult<T>>();
          return results.value.Record
             .Where(r => re.IsMatch(r.Key))
@@ -142,7 +131,7 @@ namespace mbts.persist
       protected override string user() { return "all_users"; }
 
       [ImportingConstructor]
-      public UISettings([Import("settings")]PersistenceService p, ErrorReporter err) : base(p,err) { }
+      public UISettings([Import("settings")]PersistenceService p) : base(p) { }
    }
 
    [Export(typeof(IUserPersist))]
@@ -151,8 +140,8 @@ namespace mbts.persist
       string _user;
 
       [ImportingConstructor]
-      public UserUISettings([Import("userid")]uint user, [Import("settings")]PersistenceService persist, ErrorReporter err)
-         : base(persist,err) {
+      public UserUISettings([Import("userid")]uint user, [Import("settings")]PersistenceService persist)
+         : base(persist) {
          _user = $"User {user}";
       }
 

src/client/spark/core/Utility/AnonymousEqualityComparer.cs

@@ -1,11 +1,8 @@
 using System;
-using System.Collections;
 using System.Collections.Generic;
 
 namespace mbts.utils {
    public static class EqualityComparer {
-      const int _hash_seed = 63607, _hash_multiplier = 6451;
-
       public static IEqualityComparer<T> Create<T>(Func<T, T, bool> equals) =>
          new AnonymousEqualityComparer<T>(equals);
 
@@ -26,40 +23,12 @@ namespace mbts.utils {
       public static IEqualityComparer<T?> CreateNullable<T>(Func<T, T, bool> equals) where T : struct =>
          new AnonymousEqualityComparer<T?>((a, b) => a.HasValue ? b.HasValue && equals(a.Value, b.Value) : !b.HasValue);
 
-      public static IEqualityComparer to_non_generic<T>(this IEqualityComparer<T> comparer) =>
-         new AnonymousEqualityComparer<T>(comparer.Equals, comparer.GetHashCode);
-
       public static bool NullCheckEquals<T>(T x, T y, Func<T, T, bool> non_null_equals) where T : class, IEquatable<T> =>
          x == null ? y == null :
          y != null &&
          non_null_equals(x, y);
 
-      public static int aggregate_hash(int item1_hash, int item2_hash, int item3_hash) {
-         int rv = _hash_seed;
-         unchecked {
-            _accumulate_hash(ref rv, ref item1_hash);
-            _accumulate_hash(ref rv, ref item2_hash);
-            _accumulate_hash(ref rv, ref item3_hash);
-         }
-         return rv;
-      }
-
-      // Note: be wary of the performance cost this method may have, as frequently creating large arrays can be expensive.
-      // If you wish to avoid this cost, consider making an overload like the method above, with the appropriate number of item-hash arguments
-      public static int aggregate_hash(params int[] item_hashes) {
-         int hash = _hash_seed;
-         unchecked {
-            foreach (int item_hash in item_hashes)
-               hash = hash * _hash_multiplier + item_hash;
-         }
-         return hash;
-      }
-
-      // WARNING: be sure to call this within in an unchecked scope
-      static void _accumulate_hash(ref int aggregate_hash, ref int item_hash) =>
-         aggregate_hash = aggregate_hash * _hash_multiplier + item_hash;
-
-      private class AnonymousEqualityComparer<T> : IEqualityComparer<T>, IEqualityComparer {
+      private class AnonymousEqualityComparer<T> : IEqualityComparer<T> {
          readonly Func<T, T, bool> _equals;
          readonly Func<T, int> _get_hash_code;
 
@@ -71,9 +40,6 @@ namespace mbts.utils {
 
          public bool Equals(T x, T y) => _equals(x, y);
          public int GetHashCode(T obj) => _get_hash_code(obj);
-
-         bool IEqualityComparer.Equals(object x, object y) => x is T xt && y is T yt && _equals(xt, yt);
-         int IEqualityComparer.GetHashCode(object obj) => throw new NotImplementedException();
       }
    }
 }

src/client/spark/core/Utility/CompareUtils.cs

@@ -1,6 +1,4 @@
 using System;
-using System.Collections;
-using System.Collections.Generic;
 
 namespace mbts.utils {
    public static class CompareUtils {
@@ -21,22 +19,5 @@ namespace mbts.utils {
             b.HasValue ? compare(a.Value, b.Value) : 1 :
             b.HasValue ? -1 : 0;
       #endregion
-
-      #region Comparer
-      public static IComparer to_non_generic<T>(this IComparer<T> comparer) =>
-        new NonGenericComparerWrapper<T>(comparer);
-
-      public static IComparer<TOutter> wrap<TInner, TOutter>(this IComparer<TInner> inner_comparer, Func<TOutter, TInner> selector) =>
-         Comparer<TOutter>.Create((a, b) => inner_comparer.Compare(a == null ? default : selector(a), b == null ? default : selector(b)));
-
-      class NonGenericComparerWrapper<T> : IComparer {
-         readonly IComparer<T> _comparer;
-
-         public NonGenericComparerWrapper(IComparer<T> comparer) => _comparer = comparer;
-
-         public int Compare(object x, object y) =>
-            _comparer.Compare(ObjectHelper.try_convert<T>(x), ObjectHelper.try_convert<T>(y));
-      }
-      #endregion
    }
 }

src/client/spark/core/Utility/IValueFactoryVM.cs

@@ -1,6 +0,0 @@
-namespace mbts.spark {
-   interface IValueFactoryVM<T> {
-      T create();
-      void load_from(T value);
-   }
-}

src/client/spark/core/Utility/ObservableDemuxer.cs

@@ -2,9 +2,9 @@
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
+using System.Linq;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
-using System.Threading;
 
 namespace mbts.utils {
    interface IObservableDemuxer<TKey, in TInput, out TOutput> : IObserver<TInput> {
@@ -89,17 +89,21 @@ namespace mbts.utils {
          _group_key = group_key;
       }
 
+      public void OnCompleted() { }
+      public void OnError(Exception error) { }
       public IObservable<ITableUpdateTransform<T, TKey>> subscribe(TGroupKey group_key) =>
          Observable.Create<ITableUpdateTransform<T, TKey>>(o => {
             var data = _map.GetOrAdd(group_key, gk => new Data());
-            using (data.read()) {
-               o.OnNext(data.current.as_snapshot());
-               return data.subject.Subscribe(o);
+            lock (data) {
+               var current = data.current;
+               if (current.state.Count > 0) {
+                  var state_clone = current.state.ToDictionary();
+                  o.OnNext(new TableUpdateTransform<T, TKey>(state_clone, state_clone.Values.ToList(), new List<T>(0)));
+               }
             }
+            return data.subject.Subscribe(o);
          });
 
-      public void OnCompleted() { }
-      public void OnError(Exception error) { }
       public void OnNext(TableUpdate<T, TKey> table) {
          var changes = new Dictionary<TGroupKey, ChangeSet>();
          foreach (T value in table.added)
@@ -112,29 +116,16 @@ namespace mbts.utils {
       }
 
       Data _update(Data data, ChangeSet changes) {
-         using (data.write())
-            data.subject.OnNext(data.current = data.current.update(changes.removed, changes.added, _key));
+         lock (data) {
+            data.current = data.current.update(changes.removed, changes.added, _key);
+            data.subject.OnNext(data.current);
+         }
          return data;
       }
 
       class Data {
-         int _n_read_ops, _n_write_ops;
          public readonly Subject<TableUpdateTransform<T, TKey>> subject = new Subject<TableUpdateTransform<T, TKey>>();
          public TableUpdateTransform<T, TKey> current = new TableUpdateTransform<T, TKey>();
-
-         public IDisposable read() {
-            while (_n_write_ops > 0)
-               Thread.Yield();
-            Interlocked.Increment(ref _n_read_ops);
-            return Disposable.Create(() => Interlocked.Decrement(ref _n_read_ops));
-         }
-
-         public IDisposable write() {
-            while (_n_read_ops > 0)
-               Thread.Yield();
-            Interlocked.Increment(ref _n_write_ops);
-            return Disposable.Create(() => Interlocked.Decrement(ref _n_write_ops));
-         }
       }
 
       // [John]I prefer this class over anonymous tuples bc it is easy to mix up Item1/Item2

src/client/spark/core/Utility/TableUpdateTransform.cs

@@ -7,30 +7,12 @@ using System.Linq;
 using System.Reactive.Linq;
 
 namespace mbts.utils {
-   interface IIncrementalUpdate<T, TKey> where TKey : IEquatable<TKey> {
-      IReadOnlyDictionary<TKey, T> added { get; }
-      IReadOnlyDictionary<TKey, T> removed { get; }
-   }
-
    interface ITableUpdateTransform<T, TKey> where TKey : IEquatable<TKey> {
       IReadOnlyDictionary<TKey, T> state { get; }
       IReadOnlyList<T> added { get; }
       IReadOnlyList<T> removed { get; }
    }
 
-   class IncrementalUpdate<T, TKey> : IIncrementalUpdate<T, TKey> where TKey : IEquatable<TKey> {
-      public IncrementalUpdate()
-         : this(new Dictionary<TKey, T>(0), new Dictionary<TKey, T>(0)) { }
-
-      public IncrementalUpdate(IReadOnlyDictionary<TKey, T> added, IReadOnlyDictionary<TKey, T> removed) {
-         this.added = added;
-         this.removed = removed;
-      }
-
-      public IReadOnlyDictionary<TKey, T> added { get; }
-      public IReadOnlyDictionary<TKey, T> removed { get; }
-   }
-
    class TableUpdateTransform<T, TKey> : ITableUpdateTransform<T, TKey> where TKey : IEquatable<TKey> {
       readonly Dictionary<TKey, T> _state;
       readonly IReadOnlyList<T> _added, _removed;
@@ -62,18 +44,6 @@ namespace mbts.utils {
             table._state.Add(key(item), item);
          return table;
       }
-
-      public TableUpdateTransform<T, TKey> update(IIncrementalUpdate<T, TKey> update, Func<T, TKey> key) {
-         var table = new TableUpdateTransform<T, TKey>(new Dictionary<TKey, T>(_state), added, removed);
-         foreach (var k in update.removed.Keys)
-            table._state.Remove(k);
-         foreach (var kv in update.added)
-            table._state.Add(kv.Key, kv.Value);
-         return table;
-      }
-
-      internal TableUpdateTransform<T, TKey> as_snapshot() =>
-         new TableUpdateTransform<T, TKey>(_state, _state.Values.ToList(), new T[0]);
    }
 
    [Browsable(false)]
@@ -88,15 +58,6 @@ namespace mbts.utils {
          .Select(u => new FilteredTableUpdateTransform<T, TKey>(u, predicate))
          .Where(u => u.added.Count > 0 || u.removed.Count > 0);
 
-      /// <summary>
-      /// Makes a 1:1 conversion to an IncrementalUpdate sequence of TResult (TKey remains the same).
-      /// </summary>
-      public static IObservable<IIncrementalUpdate<TResult, TKey>> convert<T, TKey, TResult>(this IObservable<IIncrementalUpdate<T, TKey>> source, Func<T, TResult> selector)
-         where TKey : IEquatable<TKey> =>
-         source.Select(update => new IncrementalUpdate<TResult, TKey>(
-            update.added.ToDictionary(kv => kv.Key, kv => selector(kv.Value)),
-            update.removed.ToDictionary(kv => kv.Key, kv => selector(kv.Value))));
-
       /// <summary>
       /// Converts sequence to show incremental changes with respect to the [TResult] value returned by result_selector.
       /// </summary>
@@ -108,33 +69,6 @@ namespace mbts.utils {
          source.Scan(new PivotTableUpdateTransform<T, TKey, TResult, TResultKey>(selector, result_key, key),
             (pivot, table) => pivot.update(table));
 
-      /// <summary>
-      /// Converts sequence to show incremental changes with respect to the [TResult] value returned by result_selector.
-      /// </summary>
-      public static IObservable<IIncrementalUpdate<TResult, TResultKey>> with_respect_to<T, TKey, TResult, TResultKey>(
-         this IObservable<IIncrementalUpdate<T, TKey>> source, Func<T, TResult> selector, Func<TResult, TResultKey> result_key, Func<T, TKey> key)
-         where TKey : IEquatable<TKey>
-         where TResultKey : IEquatable<TResultKey> =>
-         //
-         source.Scan(new PivotIncrementalUpdate<T, TKey, TResult, TResultKey>(selector, result_key, key),
-            (pivot, table) => pivot.update(table));
-
-      /// <summary>
-      /// Uses a Scan operator to accumulate state in the resulting ITableUpdateTransform sequence.
-      /// </summary>
-      public static IObservable<ITableUpdateTransform<T, TKey>> table<T, TKey>(this IObservable<IIncrementalUpdate<T, TKey>> source, Func<T, TKey> key) where TKey : IEquatable<TKey> =>
-         source.Scan(
-           new TableUpdateTransform<T, TKey>(),
-           (table, update) => table.update(update, key));
-
-      /// <summary>
-      /// Filters the incremental added/removed lists by a predicate.  Observers are only notified when the filtered added/removed lists have elements.
-      /// </summary>
-      public static IObservable<IIncrementalUpdate<T, TKey>> filter<T, TKey>(this IObservable<IIncrementalUpdate<T, TKey>> source, Func<T, bool> predicate)
-         where TKey : IEquatable<TKey> => source
-         .Select(u => new IncrementalUpdate<T, TKey>(u.added.Where(kv => predicate(kv.Value)).ToDictionary(), u.removed.Where(kv => predicate(kv.Value)).ToDictionary()))
-         .Where(u => u.added.Count > 0 || u.removed.Count > 0);
-
       class FilteredTableUpdateTransform<T, TKey> : ITableUpdateTransform<T, TKey> where TKey : IEquatable<TKey> {
          internal FilteredTableUpdateTransform(ITableUpdateTransform<T, TKey> source, Func<T, bool> predicate) {
             state = source.state;
@@ -147,57 +81,6 @@ namespace mbts.utils {
          public IReadOnlyList<T> removed { get; }
       }
 
-      class PivotIncrementalUpdate<T, TKey, TResult, TResultKey> : IIncrementalUpdate<TResult, TResultKey> where TKey : IEquatable<TKey> where TResultKey : IEquatable<TResultKey> {
-         readonly Dictionary<TResultKey, TResult> _state;
-         readonly SetMap<TResultKey, TKey> _key_map;
-         readonly Func<T, TResult> _selector;
-         readonly Func<TResult, TResultKey> _result_key;
-         readonly Func<T, TKey> _key;
-
-         internal PivotIncrementalUpdate(Func<T, TResult> selector, Func<TResult, TResultKey> result_key, Func<T, TKey> key) :
-            this(new Dictionary<TResultKey, TResult>(), new Dictionary<TResultKey, TResult>(0), new Dictionary<TResultKey, TResult>(0), new SetMap<TResultKey, TKey>(), selector, result_key, key) { }
-
-         PivotIncrementalUpdate(Dictionary<TResultKey, TResult> state, IReadOnlyDictionary<TResultKey, TResult> added, IReadOnlyDictionary<TResultKey, TResult> removed,
-            SetMap<TResultKey, TKey> key_map, Func<T, TResult> selector, Func<TResult, TResultKey> result_key, Func<T, TKey> key) {
-            //
-            _state = state;
-            this.added = added;
-            this.removed = removed;
-            _key_map = key_map;
-            _selector = selector;
-            _result_key = result_key;
-            _key = key;
-         }
-
-         public IReadOnlyDictionary<TResultKey, TResult> state => _state;
-         public IReadOnlyDictionary<TResultKey, TResult> added { get; }
-         public IReadOnlyDictionary<TResultKey, TResult> removed { get; }
-
-         public PivotIncrementalUpdate<T, TKey, TResult, TResultKey> update(IIncrementalUpdate<T, TKey> table) {
-            Dictionary<TResultKey, TResult> removed = new Dictionary<TResultKey, TResult>(), added = new Dictionary<TResultKey, TResult>();
-            var state_clone = new Dictionary<TResultKey, TResult>(_state);
-            foreach (var kv in table.removed) {
-               var result = _selector(kv.Value);
-               var rkey = _result_key(result);
-               if (_key_map.removes_key(rkey, kv.Key))
-                  removed.Add(rkey, result);
-            }
-            foreach (var kv in table.added) {
-               var result = _selector(kv.Value);
-               var rkey = _result_key(result);
-               if (_key_map.adds_key(rkey, kv.Key)) {
-                  if (!removed.Remove(rkey))
-                     added.Add(rkey, result);
-               }
-            }
-            foreach (var k in removed.Keys)
-               state_clone.Remove(k);
-            foreach (var kv in added)
-               state_clone.Add(kv.Key, kv.Value);
-            return new PivotIncrementalUpdate<T, TKey, TResult, TResultKey>(state_clone, added, removed, _key_map, _selector, _result_key, _key);
-         }
-      }
-
       class PivotTableUpdateTransform<T, TKey, TResult, TResultKey> : ITableUpdateTransform<TResult, TResultKey> where TKey : IEquatable<TKey> where TResultKey : IEquatable<TResultKey> {
          readonly Dictionary<TResultKey, TResult> _state;
          readonly SetMap<TResultKey, TKey> _key_map;

src/client/spark/core/Utility/ViewModelBase.cs

@@ -471,7 +471,7 @@ namespace mbts.ui.shell
       protected Property<T> backing<T, TData>(string name, IObservable<TData> source, Func<TData, T> select, T default_value = default) {
          if (_observable_properties == null) _observable_properties = new List<IDisposable>();
          var prop = new ObservablePropertySink<T>(this, name, default_value);
-         _observable_properties.Add(source.OnDispatcher().Subscribe(d => prop.set(select(d))));
+         _observable_properties.Add(source.ObserveOnDispatcher().Subscribe(d => prop.set(select(d))));
          return prop;
       }
 
@@ -526,8 +526,8 @@ namespace mbts.ui.shell
       protected SelectorProperty<T> backing<T>(string name, IObservable<IEnumerable<T>> items, IObservable<InlineUserProperty<T>> desired_item, Func<T> select_default, Func<T, T, bool> items_match, IReadOnlyList<PropertyValidation<T>> validation_steps) {
          if (_observable_properties == null) _observable_properties = new List<IDisposable>();
          var prop = new SelectorProperty<T>(this, name, select_default, items_match, validation_steps);
-         _observable_properties.Add(items.OnDispatcher().Subscribe(prop));
-         _observable_properties.Add(desired_item.OnDispatcher().Subscribe(prop));
+         _observable_properties.Add(items.ObserveOnDispatcher().Subscribe(prop));
+         _observable_properties.Add(desired_item.ObserveOnDispatcher().Subscribe(prop));
          return prop;
       }
 

src/client/spark/view/Controls/Badge.cs

@@ -1,220 +1,141 @@
-using bts.api;
-using mbts.spark;
-using mbts.ui.utility.text;
+using mbts.spark;
+using mbts.ui.extensions;
 using System;
 using System.Collections.Generic;
-using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Data;
+using System.Windows.Input;
 using System.Windows.Media;
-using FontFamily = System.Windows.Media.FontFamily;
+using static mbts.config.Configuration;
 
 namespace mbts.ui.controls {
-   public class Badge : Control {
-      public const double LINE_SPACING = 1;
-      // Storing the defaults here for readability
-      // Warning: these properties are used to calculate the ladder's row_height. Please change the values below if you want to change properties that affect the layout.
-      // ** - value is not the actual PropertyMetadata.DefaultValue
-      public static readonly Thickness
-         DefaultMargin = new Thickness(4, 2, 4, 2), // **
-         DefaultPadding = new Thickness(1),
-         DefaultBorderThickness = new Thickness(2);
-      public static readonly double
-         DefaultCornerRadius = 1,
-         DefaultFontSize = 10,
-         DefaultWidth = 63; // **
-      public static readonly FontFamily DefaultFontFamily = new FontFamily("Consolas");
-
-      readonly GlyphContentRect _gcr = new GlyphContentRect();
-      Brush _background, _foreground, _border_brush;
+   public class Badge: Control {
+      readonly static double _dpi = get<bts.config.System>().dpi_ratio;
 
+      Typeface _face;
+      FormattedText _center_text;
+      FormattedText _top_text;
+      FormattedText _bottom_text;
       static Badge() {
          DefaultStyleKeyProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(typeof(Badge)));
-         // MinWidth
-         WPFHelper.override_metadata<double, Badge>(
-            MinWidthProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.min_width = v,
-            0);
-         // Width
-         WPFHelper.override_metadata<double, Badge>(
-            WidthProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.width = v,
-            double.NaN);
-         // Max Width
-         WPFHelper.override_metadata<double, Badge>(
-            MaxWidthProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.max_width = v,
-            double.MaxValue);
-         // Min Height
-         WPFHelper.override_metadata<double, Badge>(
-            MinHeightProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.min_height = v,
-            0);
-         // Height
-         WPFHelper.override_metadata<double, Badge>(
-            HeightProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.height = v,
-            double.NaN);
-         // Max Height
-         WPFHelper.override_metadata<double, Badge>(
-            MaxHeightProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.max_height = v,
-            double.MaxValue);
-         // FontSize
-         WPFHelper.override_metadata<double, Badge>(
-            FontSizeProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.font_size = v,
-            DefaultFontSize);
-         // Foreground
-         WPFHelper.override_metadata<Brush, Badge>(
-            ForegroundProperty,
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._foreground = v,
-            Brushes.White);
-         // Background
-         WPFHelper.override_metadata<Brush, Badge>(
-            BackgroundProperty,
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._background = v,
-            Brushes.Transparent);
-         // BorderThickness
-         WPFHelper.override_metadata<Thickness, Badge>(
-            BorderThicknessProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.border_thickness = v,
-            DefaultBorderThickness);
-         // BorderBrush
-         WPFHelper.override_metadata<Brush, Badge>(
-            BorderBrushProperty,
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._border_brush = v,
-            Brushes.Black);
-         // FontFamily
-         WPFHelper.override_metadata<FontFamily, Badge>(
-            FontFamilyProperty,
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.glyph_context = b._gcr.glyph_context.with(v),
-            DefaultFontFamily);
-         // HoriontalAlignment
-         WPFHelper.override_metadata<HorizontalAlignment, Badge>(
-            HorizontalAlignmentProperty,
-            FrameworkPropertyMetadataOptions.AffectsArrange |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (o, v) => o._gcr.horizontal_alignment = v,
-            HorizontalAlignment.Stretch);
-         // HoriontalContentAlignment
-         WPFHelper.override_metadata<HorizontalAlignment, Badge>(
-            HorizontalContentAlignmentProperty,
-            FrameworkPropertyMetadataOptions.AffectsArrange |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (o, v) => o._gcr.horizontal_content_alignment = v,
-            HorizontalAlignment.Center);
-         // VerticalAlignment
-         WPFHelper.override_metadata<VerticalAlignment, Badge>(
-            VerticalAlignmentProperty,
-            FrameworkPropertyMetadataOptions.AffectsArrange |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (o, v) => o._gcr.vertical_alignment = v,
-            VerticalAlignment.Center);
-         // VerticalContentAlignment
-         WPFHelper.override_metadata<VerticalAlignment, Badge>(
-            VerticalContentAlignmentProperty,
-            FrameworkPropertyMetadataOptions.AffectsArrange |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (o, v) => o._gcr.vertical_content_alignment = v,
-            VerticalAlignment.Center);
-         // Padding
-         WPFHelper.override_metadata<Thickness, Badge>(
-            PaddingProperty,
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (p, v) => p._gcr.padding = v,
-            DefaultPadding);
+         WidthProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(15.0));
+         HeightProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(10.0));
+         FontSizeProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(10.0, FrameworkPropertyMetadataOptions.AffectsRender /*| FrameworkPropertyMetadataOptions.AffectsMeasure*/, update_text));
+         ForegroundProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(Brushes.White, update_text));
+         BackgroundProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(Brushes.Transparent, FrameworkPropertyMetadataOptions.AffectsRender));
+         BorderThicknessProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(new Thickness(1)));
+         BorderBrushProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(Brushes.Black));
+         FontFamilyProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(new FontFamily("Consolas"), FrameworkPropertyMetadataOptions.AffectsRender /*| FrameworkPropertyMetadataOptions.AffectsMeasure*/, update_text));
+
+         //TextProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure, update_text));
+         //TopTextProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure, update_text));
+         //BottomTextProperty.OverrideMetadata(typeof(Badge), new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure, update_text));
       }
 
-      public Badge() {
-         _gcr.min_width = MinWidth;
-         _gcr.width = Width;
-         _gcr.max_width = MaxWidth;
-         _gcr.min_height = MinHeight;
-         _gcr.height = Height;
-         _gcr.max_height = Height;
-         _gcr.padding = Padding;
-         _gcr.border_thickness = BorderThickness;
-         _gcr.horizontal_alignment = HorizontalAlignment;
-         _gcr.horizontal_content_alignment = HorizontalContentAlignment;
-         _gcr.vertical_alignment = VerticalAlignment;
-         _gcr.vertical_content_alignment = VerticalContentAlignment;
-         _background = Background;
-         _foreground = Foreground;
-         _border_brush = BorderBrush;
-         _gcr.font_size = FontSize;
-         _gcr.text_lines = TextLines;
-         _gcr.glyph_context = GlyphContext.create(FontFamily, FontWeight);
+      public string Text {
+         get { return (string)GetValue(TextProperty); }
+         set { SetValue(TextProperty, value); }
+      }
+      public static readonly DependencyProperty TextProperty =
+          DependencyProperty.Register("Text", typeof(string), typeof(Badge), new PropertyMetadata(string.Empty, 
+             format_text((b,v) => b._center_text= v)));
+
+
+      public string TopText {
+         get { return (string)GetValue(TopTextProperty); }
+         set { SetValue(TopTextProperty, value); }
+      }
+      public static readonly DependencyProperty TopTextProperty =
+          DependencyProperty.Register(nameof(TopText), typeof(string), typeof(Badge), new PropertyMetadata(string.Empty,
+             format_text((b, v) => b._top_text = v)));
+
+      public string BottomText {
+         get { return (string)GetValue(BottomTextProperty); }
+         set { SetValue(BottomTextProperty, value); }
       }
 
-      public static readonly DependencyProperty TextLinesProperty =
-         WPFHelper.create_dp<IReadOnlyList<string>, Badge>(
-            nameof(TextLines),
-            FrameworkPropertyMetadataOptions.AffectsMeasure |
-            FrameworkPropertyMetadataOptions.AffectsRender,
-            (b, v) => b._gcr.text_lines = v,
-            new string[0]);
-
-      public IReadOnlyList<string> TextLines {
-         get => GetValue(TextLinesProperty) as IReadOnlyList<string>;
-         set => SetValue(TextLinesProperty, value);
-      }
+      public static readonly DependencyProperty BottomTextProperty =
+          DependencyProperty.Register(nameof(BottomText), typeof(string), typeof(Badge), new PropertyMetadata(string.Empty, 
+             format_text((b,v)=>b._bottom_text=v)));
 
       public double CornerRadius {
          get { return (double)GetValue(CornerRadiusProperty); }
          set { SetValue(CornerRadiusProperty, value); }
       }
-
       public static readonly DependencyProperty CornerRadiusProperty =
-         WPFHelper.create_dp<double, Badge>(nameof(CornerRadius), DefaultCornerRadius);
+          DependencyProperty.Register("CornerRadius", typeof(double), typeof(Badge), new PropertyMetadata(3.0));
 
-      protected override Size ArrangeOverride(Size finalSize) => finalSize;
-
-      protected override Size MeasureOverride(Size availableSize) {
-         _gcr.available_size = availableSize;
-         return _gcr.layout_size;
+      static PropertyChangedCallback format_text(Action<Badge,FormattedText> f) {
+         return (d, e) => {
+            Badge b = (Badge)d;
+            ensure_fontface(b);
+            string text = e.NewValue as string;
+            if (string.IsNullOrEmpty(text)) f(b, null);
+            f(b, new FormattedText(text,
+               System.Globalization.CultureInfo.CurrentCulture,
+               FlowDirection.LeftToRight,
+               b._face, b.FontSize, b.Foreground, _dpi));
+            b.InvalidateVisual();
+         };
       }
+      static FormattedText format_text(Badge badge, DependencyProperty source) {
+         FormattedText result = null;
+         var value = badge.GetValue(source);
+         format_text((b, v) => result = v)(badge, new DependencyPropertyChangedEventArgs(source, value, value));
+         return result;
+      }
+
+      static void update_text(DependencyObject d, DependencyPropertyChangedEventArgs args) {
+         // Force formatted text regeneration when font/color changes
+         Badge badge = (Badge)d;
+         badge._face = null;
+         ensure_fontface(badge);
+         badge._center_text = format_text(badge, TextProperty);
+         badge._top_text = format_text(badge, TopTextProperty);
+         badge._bottom_text = format_text(badge, BottomTextProperty);
+      }
+
+      private static void ensure_fontface(Badge b) {
+         b._face = b._face ?? new Typeface(b.FontFamily, b.FontStyle, b.FontWeight, b.FontStretch);
+      }
+
+      //protected override Size MeasureOverride(Size availableSize) {
+      //   Double calc_height = 0.0;
+      //   Double calc_width = 0.0;
+      //   Size size = new Size(0, 0);
+
+      //   Size center_size = new Size(_center_text.Width, _center_text.Height);
+      //   Size top_size = new Size(_top_text.Width, _top_text.Height);
+      //   Size bottom_size = new Size(_bottom_text.Width, _bottom_text.Height);
+
+      //   calc_width = Math.Max(center_size.Width, top_size.Width);
+      //   calc_width = Math.Max(calc_width, bottom_size.Width);
+
+      //   calc_height += center_size.Height;
+      //   calc_height += top_size.Height;
+      //   calc_height += bottom_size.Height;
+
+      //   size.Width = calc_width;
+      //   size.Height = calc_height;
+
+      //   return size;
+
+      //}
 
       protected override void OnRender(DrawingContext dc) {
          base.OnRender(dc);
          double border_thickness = BorderThickness.Top;
          var pen = new Pen(BorderBrush, border_thickness);
-         dc.DrawRoundedRectangle(Background, pen, new Rect(0, border_thickness, _gcr.layout_size.Width, _gcr.layout_size.Height), CornerRadius, CornerRadius);
-         var gr = _gcr.glyph_run;
-         if (gr != null)
-            dc.DrawGlyphRun(_foreground, gr);
+         dc.DrawRoundedRectangle(Background, pen, new Rect(0, 0 + border_thickness, ActualWidth, ActualHeight - 2 * border_thickness), CornerRadius, CornerRadius);
+         if (_center_text != null)
+            dc.DrawText(_center_text, new Point((ActualWidth-_center_text.Width)/2, (ActualHeight-_center_text.Height)/2));
+         if (_top_text != null)
+             dc.DrawText(_top_text, new Point(border_thickness, border_thickness));
+         if (_bottom_text != null)
+            dc.DrawText(_bottom_text, new Point(border_thickness, ActualHeight - _bottom_text.Height - border_thickness));
       }
-   }
-
-   class BadgeTextLinesConverter : IMultiValueConverter {
-      public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) {
-         if (ObjectHelper.try_convert_args(values, out Side side, out uint quantity, out uint filled, out mbts.spark.LadderSettings.BadgeStyle style))
-            return BadgeRender.format(side, quantity, filled, style);
-         else return new string[0];
-      }
-
-      public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) => throw new NotImplementedException();
-   }
+   } 
 }

src/client/spark/view/Controls/CountDownTimer.cs

@@ -73,7 +73,7 @@ namespace mbts.ui.controls {
          Disposable.dispose(ref timer._trigger_sub);
          IObservable<object> newval = args.NewValue as IObservable<object>;
          if (newval != null) {
-            timer._trigger_sub = newval.OnDispatcher().Subscribe(timer.start);
+            timer._trigger_sub = newval.ObserveOnDispatcher().Subscribe(timer.start);
          }
       }
 

src/client/spark/view/Controls/DIYGrid/Columns/ColumnBase.cs

@@ -1,5 +1,4 @@
 using mbts.spark.filters;
-using System;
 using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
@@ -61,19 +60,13 @@ namespace mbts.ui.controls {
             WPFHelper.create_dp<ListSortDirection?, ColumnBase>(
                nameof(SortDirection), (o, v) => o.OnSortDirectionChanged(v));
 
-         public ListSortDirection? SortDirection {
-            get => GetValue(SortDirectionProperty) as ListSortDirection?;
-            set => SetValue(SortDirectionProperty, value);
-         }
-
-         public event Action<ColumnBase, ListSortDirection?> sort_direction_changed;
+         public ListSortDirection? SortDirection { get => GetValue(SortDirectionProperty) as ListSortDirection?; set => SetValue(SortDirectionProperty, value); }
 
          public string sort_member_path { get; set; }
          public double original_width { get; set; }
          public bool is_collapsed { get; set; }
 
-         protected virtual void OnSortDirectionChanged(ListSortDirection? new_value) =>
-            sort_direction_changed?.Invoke(this, new_value);
+         protected virtual void OnSortDirectionChanged(ListSortDirection? new_value) { }
       }
 
       internal abstract class ColumnBase<TColKey> : ColumnBase, IKeyedColumn<TColKey> {

src/client/spark/view/Controls/DataGridEx/Filters/VM/DiscreteValuesFilterVM.cs

@@ -49,7 +49,7 @@ namespace mbts.spark.filters {
       ) => new DynamicItemsFilter<TRow, TValue, TState>(items, get_row_val, get_state, load_state, prop_name, equality_comparer, comparer);
 
       public static IDataGridColumnPersistentFilter<TRow, TState> Create<TRow, TValue, TState>(
-        IObservable<(IEnumerable<TValue> added, IEnumerable<TValue> removed)> items,
+        IObservable<(IReadOnlyList<TValue> added, IReadOnlyList<TValue> removed)> items,
         Func<TRow, TValue> get_row_val,
         Func<ISet<TValue>, TState> get_state,
         Func<TState, IObservable<IEnumerable<TValue>>> load_state,
@@ -115,14 +115,14 @@ namespace mbts.spark.filters {
             IComparer<TValue> comparer = null
          ) : this(get_row_val, get_state, load_state, prop_name, equality_comparer, comparer) {
             //
-            _items_sub = items.OnDispatcher().Subscribe(new_items => {
+            _items_sub = items.ObserveOnDispatcher().Subscribe(new_items => {
                _items_set.SetItems(new_items.Concat(_selected_items_set));
                _unsorted_items.sync_with(_items_set);
             });
          }
  
          public DynamicItemsFilter(
-            IObservable<(IEnumerable<TValue> added, IEnumerable<TValue> removed)> items,
+            IObservable<(IReadOnlyList<TValue> added, IReadOnlyList<TValue> removed)> items,
             Func<TRow, TValue> get_row_val,
             Func<ISet<TValue>, TState> get_state,
             Func<TState, IObservable<IEnumerable<TValue>>> load_state,
@@ -131,7 +131,7 @@ namespace mbts.spark.filters {
             IComparer<TValue> comparer = null
          ) : this(get_row_val, get_state, load_state, prop_name, equality_comparer, comparer) {
             //
-            _items_sub = items.OnDispatcher().Subscribe(update => {
+            _items_sub = items.ObserveOnDispatcher().Subscribe(update => {
                foreach (var v in update.added)
                   _items_set.Add(v);
                foreach (var v in update.removed.Except(_selected_items_set))
@@ -182,7 +182,7 @@ namespace mbts.spark.filters {
 
          protected override void _load_state_internal(TState state) {
             Disposable.dispose(ref _desired_items_sub);
-            _desired_items_sub = _load_state(state).OnDispatcher().Subscribe(_on_desired_item);
+            _desired_items_sub = _load_state(state).ObserveOnDispatcher().Subscribe(_on_desired_item);
          }
 
          protected override void _apply() {

src/client/spark/view/Controls/DataGridEx/Filters/Views/TimeFilter.cs

@@ -54,9 +54,8 @@ namespace mbts.ui {
       public static TimeTextTuple FromTicks(long ticks) =>
          FromDateTime(new DateTime(ticks));
 
-      public static TimeTextTuple FromDateTime(DateTime date_time) => FromDateTime(date_time, "t");
-      public static TimeTextTuple FromDateTime(DateTime date_time, string time_format) =>
-         new TimeTextTuple(DateTimeFormatInfo.CurrentInfo.AbbreviatedMonthNames[date_time.Month - 1], date_time.Day.ToString(), date_time.Year.ToString(), date_time.ToString(time_format));
+      public static TimeTextTuple FromDateTime(DateTime date_time) =>
+         new TimeTextTuple(DateTimeFormatInfo.CurrentInfo.AbbreviatedMonthNames[date_time.Month - 1], date_time.Day.ToString(), date_time.Year.ToString(), date_time.ToString("t"));
 
       public TimeTextTuple(string month_text, string day_text, string year_text, string time_text) {
          _month_text = month_text;
@@ -108,23 +107,14 @@ namespace mbts.ui {
 
 
       static DateTime? _parse(string month_text, string day_text, string year_text, string time_text) {
-         TimeSpan? t = _parse_time(time_text);
+         DateTime? t = _parse(time_text);
          if (t.HasValue) {
             DateTime? d = _parse($"{month_text}/{day_text}/{year_text}");
-            if (d.HasValue) return d.Value.Date.Add(t.Value);
+            if (d.HasValue) return d.Value.Date.AddDays(t.Value.TimeOfDay.TotalDays);
          }
          return null;
       }
 
-      static TimeSpan? _parse_time(string text) {
-         DateTime? dt = _parse(text);
-         if (dt.HasValue) {
-            return dt.Value.TimeOfDay;
-         } else if (TimeSpan.TryParse(text, out TimeSpan result) && result < TimeSpan.FromDays(1)) {
-            return result;
-         } else return null;
-      }
-
       static DateTime? _parse(string text) {
          if (!string.IsNullOrEmpty(text) && DateTime.TryParse(text, out DateTime result))
             return result;

src/client/spark/view/Controls/DataGridEx/Filters/Views/TimeFilterControl.xaml

@@ -26,7 +26,7 @@
                 ItemTemplate="{StaticResource EnumDescriptionTemplate}"
                 SelectedItem="{Binding Mode, RelativeSource={RelativeSource TemplatedParent}}"
               />
-              <Grid x:Name="PeriodRoot" Grid.Row="1" Margin="24,6,0,0" IsEnabled="False">
+              <Grid x:Name="PeriodRoot" Grid.Row="1" Margin="0,6,0,0" IsEnabled="False">
                 <Grid.RowDefinitions>
                   <RowDefinition/>
                   <RowDefinition Height="4"/>

src/client/spark/view/Controls/DataGridEx/Filters/Views/TimeFilterControl.xaml.cs

@@ -73,9 +73,8 @@ namespace mbts.ui.controls {
    public enum TimeFilterMode {
       Anytime,
       Today,
-      [Description("Period:")]
       Period,
-      [Description("Since Open")]
+      [Description("Glbx Open")]
       CMEOpen
    }
 }

src/client/spark/view/Controls/Order/OrderDetailsPopupControl.xaml

@@ -10,7 +10,6 @@
     <ResourceDictionary Source="/view/Controls/PriceEntryControl.xaml"/>
     <ResourceDictionary Source="/view/Controls/Popup/PopupControl.xaml"/>
     <ResourceDictionary Source="/view/Controls/Time/TimeSpanControl.xaml"/>
-    <ResourceDictionary Source="/view/Controls/Order/QuantityMeasureControl.xaml"/>
     <ResourceDictionary Source="/Modules/Spreader/ExecutionStrategyEditor.xaml"/>
   </ResourceDictionary.MergedDictionaries>
   <Style TargetType="uag:OrderDetailsPopupControl">
@@ -156,186 +155,6 @@
                       </Grid>
                     </DataTemplate>
                   </usp:OrderModificationTemplateSelector.TimeBoxOrderTemplate>
-                  <usp:OrderModificationTemplateSelector.TickOrderTemplate>
-                    <DataTemplate>
-                      <Grid>
-                        <Grid.RowDefinitions>
-                          <RowDefinition/>
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />                          
-                          <RowDefinition/>
-                        </Grid.RowDefinitions>
-                        <Grid.ColumnDefinitions>
-                          <ColumnDefinition Width="Auto"/>
-                          <ColumnDefinition Width="12"/>
-                          <ColumnDefinition/>
-                        </Grid.ColumnDefinitions>
-                        <TextBlock Grid.Row="1" VerticalAlignment="Center">Cross Thresh</TextBlock>
-                        <uag:QuantityMeasureControl Grid.Row="1" Grid.Column="2" QuantityMeasure="{Binding cross_threshold}"/>
-                        
-                        <TextBlock Grid.Row="3" VerticalAlignment="Center">Cross Ticks</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="3" Grid.Column="2" Value="{Binding cross_ticks}"/>
-                        <TextBlock Grid.Row="5" VerticalAlignment="Center">Max Chase Ticks</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="5" Grid.Column="2" Value="{Binding max_chase_ticks}"/>
-                        <CheckBox Grid.Row="7" Grid.Column="2" VerticalAlignment="Center" Margin="0,0,0,0" IsChecked="{Binding detach_on_toward}">Detach on Toward</CheckBox>
-                        <TextBlock Grid.Row="9" VerticalAlignment="Center">Initial Tick Offset</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="9" Grid.Column="2" Value="{Binding tick_offset_on_deploy}"/>
-                        <TextBlock Grid.Row="11">Child</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="11" Grid.Column="2"
-                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding child_order_types}"
-                          SelectedItem="{Binding child_order}"
-                          HasEditableProperties="{Binding child_order.has_editable_properties, FallbackValue=False}"
-                        />
-                      </Grid>
-                    </DataTemplate>
-                  </usp:OrderModificationTemplateSelector.TickOrderTemplate>   
-                  <usp:OrderModificationTemplateSelector.LeanOrderTemplate>
-                    <DataTemplate>
-                      <Grid>
-                        <Grid.RowDefinitions>
-                          <RowDefinition/>
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition/>
-                        </Grid.RowDefinitions>
-                        <Grid.ColumnDefinitions>
-                          <ColumnDefinition Width="Auto"/>
-                          <ColumnDefinition Width="12"/>
-                          <ColumnDefinition/>
-                        </Grid.ColumnDefinitions>
-                        <TextBlock Grid.Row="1" VerticalAlignment="Center">Cross Thresh</TextBlock>
-                        <uag:QuantityMeasureControl Grid.Row="1" Grid.Column="2" QuantityMeasure="{Binding cross_threshold}"/>
-                        <TextBlock Grid.Row="3" VerticalAlignment="Center">Max Chase Ticks</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="3" Grid.Column="2" Value="{Binding max_chase_ticks}"/>
-                        <TextBlock Grid.Row="5">Child</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="5" Grid.Column="2"
-                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding child_order_types}"
-                          SelectedItem="{Binding child_order}"
-                          HasEditableProperties="{Binding child_order.has_editable_properties, FallbackValue=False}"
-                        />
-                      </Grid>
-                    </DataTemplate>
-                  </usp:OrderModificationTemplateSelector.LeanOrderTemplate>  
-                  <usp:OrderModificationTemplateSelector.JoinOrderTemplate>
-                    <DataTemplate>
-                      <Grid>
-                        <Grid.RowDefinitions>
-                          <RowDefinition/>
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />                          
-                          <RowDefinition/>
-                        </Grid.RowDefinitions>
-                        <Grid.ColumnDefinitions>
-                          <ColumnDefinition Width="Auto"/>
-                          <ColumnDefinition Width="12"/>
-                          <ColumnDefinition/>
-                        </Grid.ColumnDefinitions>
-                        <TextBlock Grid.Row="1" VerticalAlignment="Center">Join Thresh</TextBlock>
-                        <uag:QuantityMeasureControl Grid.Row="1" Grid.Column="2" QuantityMeasure="{Binding join_threshold}"/>                                                
-                        <CheckBox Grid.Row="3" Grid.Column="2" VerticalAlignment="Center" Margin="0,0,0,0" IsChecked="{Binding enable_hedge}">Enable Hedge</CheckBox>
-                        <TextBlock Grid.Row="5" VerticalAlignment="Center" IsEnabled="{Binding enable_hedge}" >Hedge Ticks</TextBlock>                                                
-                        <c:TickUpDownInt Grid.Row="5" Grid.Column="2" IsEnabled="{Binding enable_hedge}" Value="{Binding hedge_ticks}"/>
-                        <TextBlock Grid.Row="7">Hedge</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="7" Grid.Column="2"
-                          IsEnabled="{Binding enable_hedge}"
-                          IsOpen="{Binding hedge_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding hedge_order_types}"
-                          SelectedItem="{Binding hedge_order}"
-                          HasEditableProperties="{Binding hedge_order.has_editable_properties, FallbackValue=False}"
-                        />                        
-                        <TextBlock Grid.Row="9" VerticalAlignment="Center">Initial Tick Offset</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="9" Grid.Column="2" Value="{Binding tick_offset_on_deploy}"/>
-                        <TextBlock Grid.Row="11">Child</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="11" Grid.Column="2"
-                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding child_order_types}"
-                          SelectedItem="{Binding child_order}"
-                          HasEditableProperties="{Binding child_order.has_editable_properties, FallbackValue=False}"
-                        />
-                      </Grid>
-                    </DataTemplate>
-                  </usp:OrderModificationTemplateSelector.JoinOrderTemplate>
-                  <usp:OrderModificationTemplateSelector.TopOrderTemplate>
-                    <DataTemplate>
-                      <Grid>
-                        <Grid.RowDefinitions>
-                          <RowDefinition/>
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition Height="4" />                          
-                          <RowDefinition/>
-                        </Grid.RowDefinitions>
-                        <Grid.ColumnDefinitions>
-                          <ColumnDefinition Width="Auto"/>
-                          <ColumnDefinition Width="12"/>
-                          <ColumnDefinition/>
-                        </Grid.ColumnDefinitions>
-                        <TextBlock Grid.Row="1" VerticalAlignment="Center">Top Thresh</TextBlock>
-                        <uag:QuantityMeasureControl Grid.Row="1" Grid.Column="2" QuantityMeasure="{Binding top_threshold}"/>                                                
-                        <CheckBox Grid.Row="3" Grid.Column="2" VerticalAlignment="Center" Margin="0,0,0,0" IsChecked="{Binding enable_hedge}">Enable Hedge</CheckBox>
-                        <TextBlock Grid.Row="5" VerticalAlignment="Center" IsEnabled="{Binding enable_hedge}" >Hedge Ticks</TextBlock>                                                
-                        <c:TickUpDownInt Grid.Row="5" Grid.Column="2" IsEnabled="{Binding enable_hedge}" Value="{Binding hedge_ticks}"/>
-                        <TextBlock Grid.Row="7">Hedge</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="7" Grid.Column="2"
-                          IsEnabled="{Binding enable_hedge}"
-                          IsOpen="{Binding hedge_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding hedge_order_types}"
-                          SelectedItem="{Binding hedge_order}"
-                          HasEditableProperties="{Binding hedge_order.has_editable_properties, FallbackValue=False}"
-                        />                        
-                        <TextBlock Grid.Row="9" VerticalAlignment="Center">Watch Levels</TextBlock>
-                        <c:TickUpDownUInt Grid.Row="9" Grid.Column="2" Value="{Binding watch_level_tick_offset}"/>
-                        <TextBlock Grid.Row="11">Child</TextBlock>
-                        <uag:OrderDetailsPopupControl
-                          Grid.Row="11" Grid.Column="2"
-                          IsOpen="{Binding child_order.editable_properties_open, FallbackValue=False}"
-                          ItemsSource="{Binding child_order_types}"
-                          SelectedItem="{Binding child_order}"
-                          HasEditableProperties="{Binding child_order.has_editable_properties, FallbackValue=False}"
-                        />
-                      </Grid>
-                    </DataTemplate>
-                  </usp:OrderModificationTemplateSelector.TopOrderTemplate>                                                                                                                              
                   <usp:OrderModificationTemplateSelector.IcebergOrderTemplate>
                     <DataTemplate>
                       <Grid>
@@ -361,30 +180,21 @@
                         />
                       </Grid>
                     </DataTemplate>
-                  </usp:OrderModificationTemplateSelector.IcebergOrderTemplate>                
+                  </usp:OrderModificationTemplateSelector.IcebergOrderTemplate>
                   <usp:OrderModificationTemplateSelector.SpreaderTemplate>
                     <DataTemplate>
-                      <Grid>
-                        <Grid.RowDefinitions>
-                          <RowDefinition Height="Auto"/>
-                          <RowDefinition/>
-                        </Grid.RowDefinitions>
-                        <usp:ExecutionStrategyEditor
-                          Margin="6"
-                          HorizontalAlignment="Stretch"
-                          DataContext="{Binding strategy_editor}"
-                          SyntheticName="{Binding name}"
-                          TickFactors="{Binding tick_factors}"
-                          IsNew="False"
-                          IsNewLegPopupOpen="{Binding is_new_leg_popup_open}"
-                          PriceCalc="{Binding price_calc}"
-                          ParameterRows="{Binding rows}"
-                          LegTuples="{Binding leg_tuples}"
-                          RemoveLegCommand="{Binding remove_leg}"
-                          ContractPickerModel="{Binding contract_picker_model}"
-                        />
-                        <c:DialogSkirt Grid.Row="1" Margin="-4" RightItems="{Binding skirt_items}"/>
-                      </Grid>
+                      <usp:ExecutionStrategyEditor
+                        HorizontalAlignment="Stretch" Margin="6"
+                        DataContext="{Binding strategy_editor}"
+                        SyntheticName="{Binding name}"
+                        IsNew="{Binding is_new}"
+                        IsNewLegPopupOpen="{Binding is_new_leg_popup_open}"
+                        PriceCalc="{Binding price_calc}"
+                        ParameterRows="{Binding rows}"
+                        LegTuples="{Binding leg_tuples}"
+                        RemoveLegCommand="{Binding remove_leg}"
+                        ContractPickerModel="{Binding contract_picker_model}"
+                      />
                     </DataTemplate>
                   </usp:OrderModificationTemplateSelector.SpreaderTemplate>
                 </usp:OrderModificationTemplateSelector>

src/client/spark/view/Controls/Order/OrderTypeItem.xaml

@@ -15,7 +15,7 @@
                 <ColumnDefinition Width="Auto"/>
                 <ColumnDefinition/>
               </Grid.ColumnDefinitions>
-              <c:Badge Background="{Binding Metadata, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource OrderTypeBrushConverter}}" BorderThickness="1" Width="15" Height="10" HorizontalAlignment="Left" />
+              <c:Badge Background="{Binding Metadata, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource OrderTypeBrushConverter}}" Width="15" Height="10" HorizontalAlignment="Left" />
               <TextBlock Text="{Binding OrderType, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource OrderTypeDisplayTextConverter}}" Margin="20,0,0,0" HorizontalAlignment="Left" />
             </Grid>
           </Border>

src/client/spark/view/Controls/PriceEntryControl.xaml

@@ -28,14 +28,7 @@
         BorderBrush="{TemplateBinding BorderBrush}"
         BorderThickness="{TemplateBinding BorderThickness}"
         Text="{Binding Value, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource TickDisplayTwoWayConverter}, Mode=TwoWay}"
-      >
-        <TextBox.CommandBindings>
-          <CommandBinding Command="{x:Static u:TextBoxBehavior.SelectAllCommand}" Executed="{x:Static u:TextBoxBehavior.SelectAllCommandExecutedHandler}"/>
-        </TextBox.CommandBindings>
-        <TextBox.InputBindings>
-          <MouseBinding MouseAction="LeftDoubleClick" Command="{x:Static u:TextBoxBehavior.SelectAllCommand}"/>
-        </TextBox.InputBindings>
-      </TextBox>
+      />
     </c:TickUpDown>
   </ControlTemplate>
   <Style TargetType="usp:PriceEntryControl">

src/client/spark/view/Controls/PriceEntryControl.xaml.cs

@@ -41,36 +41,30 @@ namespace mbts.ui.spark {
 
       #region ContractSpec
       public static readonly DependencyProperty ContractSpecProperty = DependencyProperty.Register("ContractSpec", typeof(ContractSpecificationImmutable), typeof(PriceEntryControl),
-         new PropertyMetadata(SecurityDataHelper.Defaults.ContractSpecificationImmutablePennies, OnContractSpecChanged));
+         new PropertyMetadata(SecurityDataHelper.Defaults.ContractSpecificationImmutable, OnContractSpecChanged));
       static void OnContractSpecChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) => ((PriceEntryControl)d)._update_text_binding();
       public ContractSpecificationImmutable? ContractSpec { get => GetValue(ContractSpecProperty) as ContractSpecificationImmutable?; set => SetValue(ContractSpecProperty, value); }
       #endregion
 
       TextBox _text;
+      IDisposable _text_input_hook;
 
       public PriceEntryControl() {
          TickUpCommand = new DelegateCommand(_tick_up);
          TickDownCommand = new DelegateCommand(_tick_down);
       }
 
-      IDisposable _keyboard_focus_sub;
-      bool _has_keyboard_focus;
-
       public override void OnApplyTemplate() {
-         Disposable.dispose(ref _keyboard_focus_sub);
          _text = this.assert_template_child<TextBox>("_text");
-         _keyboard_focus_sub = _text.SubscribeKeyboardFocus(val => _has_keyboard_focus = val);
+         Disposable.dispose(ref _text_input_hook);
+         _text_input_hook = _text.SubscribePreviewTextInput((s, e) => e.Handled = !RegexFilters.PriceInput.IsMatch(_text.PeekText(e)));
          _update_text_binding();
       }
 
       void _tick_up() {
-         if (_has_keyboard_focus) {
-            _text.GetBindingExpression(TextBox.TextProperty)?.UpdateSource();
-         }
          double v = Value;
-         if (double.IsNaN(v)) {
-            SetCurrentValue(ValueProperty, TickDefaultValue);
-         } else {
+         if (double.IsNaN(v)) SetCurrentValue(ValueProperty, TickDefaultValue);
+         else {
             var spec = ContractSpec;
             if (spec.HasValue) SetCurrentValue(ValueProperty, spec.Value.tickup(v));
             else SetCurrentValue(ValueProperty, TickDefaultValue);
@@ -78,13 +72,9 @@ namespace mbts.ui.spark {
       }
 
       void _tick_down() {
-         if (_has_keyboard_focus) {
-            _text.GetBindingExpression(TextBox.TextProperty)?.UpdateSource();
-         }
          double v = Value;
-         if (double.IsNaN(v)) {
-            SetCurrentValue(ValueProperty, TickDefaultValue);
-         } else {
+         if (double.IsNaN(v)) SetCurrentValue(ValueProperty, TickDefaultValue);
+         else {
             var spec = ContractSpec;
             if (spec.HasValue) SetCurrentValue(ValueProperty, spec.Value.tickdown(v));
             else SetCurrentValue(ValueProperty, TickDefaultValue);

src/client/spark/view/Controls/SparkMenu/SparkMenu.cs

@@ -10,11 +10,9 @@ namespace mbts.ui.controls {
       static SparkMenu() =>
          DefaultStyleKeyProperty.OverrideMetadata(typeof(SparkMenu), new FrameworkPropertyMetadata(typeof(SparkMenu)));
 
-      public SparkMenu() {
+      public SparkMenu() =>
          SetCurrentValue(FocusableProperty, false);
-      }
 
-      
       public SparkMenu(IEnumerable<SparkCommand> commands, IBus bus) : this() =>
          ItemsSource = commands.Select(c => new SparkCommandVM(c, bus)).ToList();
 

src/client/spark/view/Controls/TickFactorsPicker/TickFactorsPicker.xaml

@@ -1,75 +0,0 @@
-<ResourceDictionary
-  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-  xmlns:u="clr-namespace:mbts.ui"
-  xmlns:c="clr-namespace:mbts.ui.controls"
-  xmlns:cv="clr-namespace:mbts.ui.converters"
-  xmlns:txt="clr-namespace:mbts.ui.utility.text"
-  xmlns:sys="clr-namespace:System;assembly=mscorlib"
->
-  <ResourceDictionary.MergedDictionaries>
-    <ResourceDictionary Source="/view/Resources/ComboBoxes.xaml"/>
-    <ResourceDictionary Source="/view/Resources/Converters.xaml"/>
-  </ResourceDictionary.MergedDictionaries>
-  <Style TargetType="c:TickFactorsPicker">
-    <Setter Property="Template">
-      <Setter.Value>
-        <ControlTemplate TargetType="c:TickFactorsPicker">
-          <Grid>
-            <Grid.ColumnDefinitions>
-              <ColumnDefinition Width="Auto"/>
-              <ColumnDefinition Width="4"/>
-              <ColumnDefinition/>
-            </Grid.ColumnDefinitions>
-            <ComboBox
-              MinWidth="48"
-              IsEditable="True"
-              DisplayMemberPath="value"
-              SelectedValuePath="value"
-              ItemsSource="{Binding TickUnitPresetsView, RelativeSource={RelativeSource TemplatedParent}}"
-              SelectedValue="{Binding Controller.tick_unit, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
-              Text="{Binding Controller.tick_unit, Converter={StaticResource DoubleTextConverter}, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
-            >
-              <ComboBox.GroupStyle>
-                <GroupStyle ContainerStyle="{StaticResource ComboBox.DelineatedGroupContainerStyle}"/>
-              </ComboBox.GroupStyle>
-              <ComboBox.ItemTemplate>
-                <DataTemplate>
-                  <Grid>
-                    <Grid.ColumnDefinitions>
-                      <ColumnDefinition Width="Auto"/>
-                      <ColumnDefinition Width="*"/>
-                    </Grid.ColumnDefinitions>
-                    <TextBlock>
-                      <TextBlock.Text>
-                        <MultiBinding Converter="{x:Static c:TickFactorsPicker.TickUnitVisibleTextConverter}">
-                          <Binding Path="Controller.tick_base" RelativeSource="{RelativeSource AncestorType=c:TickFactorsPicker}"/>
-                          <Binding Path="value"/>
-                        </MultiBinding>
-                      </TextBlock.Text>
-                    </TextBlock>
-                    <TextBlock Grid.Column="1" Foreground="{u:BTSColor UI.input_disabled_text}" Text="{Binding value, Converter={x:Static c:TickFactorsPicker.TickUnitHiddenTextConverter}}"/>
-                  </Grid>
-                </DataTemplate>
-              </ComboBox.ItemTemplate>
-            </ComboBox>
-            <ComboBox
-              Grid.Column="2"
-              MinWidth="60"
-              IsEditable="True"
-              DisplayMemberPath="value"
-              SelectedValuePath="value"
-              ItemsSource="{Binding TickBasePresetsView, RelativeSource={RelativeSource TemplatedParent}}"
-              SelectedValue="{Binding Controller.tick_base, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
-              Text="{Binding Controller.tick_base, Converter={StaticResource DoubleTextConverter}, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
-            >
-              <ComboBox.GroupStyle>
-                <GroupStyle ContainerStyle="{StaticResource ComboBox.DelineatedGroupContainerStyle}"/>
-              </ComboBox.GroupStyle>
-            </ComboBox>
-          </Grid>
-        </ControlTemplate>
-      </Setter.Value>
-    </Setter>
-  </Style>
-</ResourceDictionary>

src/client/spark/view/Controls/TickFactorsPicker/TickFactorsPicker.xaml.cs

@@ -1,157 +0,0 @@
-using mbts.spark;
-using mbts.spark.utilities;
-using mbts.ui.converters;
-using mbts.ui.shell;
-using mbts.ui.utility;
-using mbts.user.settings;
-using mbts.utils;
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.ComponentModel;
-using System.Linq;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-
-namespace mbts.ui.controls {
-   /// <summary>
-   /// Interaction logic for TickPicker.xaml
-   /// </summary>
-   class TickFactorsPicker : Control {
-      readonly ObservableCollection<double> _tick_unit_presets = new ObservableCollection<double>();
-
-      static TickFactorsPicker() =>
-         DefaultStyleKeyProperty.OverrideMetadata(typeof(TickFactorsPicker), new FrameworkPropertyMetadata(typeof(TickFactorsPicker)));
-
-      public TickFactorsPicker() {
-         Controller = new TickFactorsController(this);
-         TickBasePresetsView.GroupDescriptions.Add(new PropertyGroupDescription(nameof(TickBaseVM.reduced_base_group)));
-         ((ListCollectionView)TickBasePresetsView).CustomSort = TickUtils.CompareUtils.base_comparer.wrap<double, TickBaseVM>(vm => vm.value).to_non_generic();
-         TickUnitPresetsView = CollectionViewSource.GetDefaultView(new ObservableAutoWrapper<TickUnitVM, double>(_tick_unit_presets, v => new TickUnitVM(v)));
-         TickUnitPresetsView.GroupDescriptions.Add(new PropertyGroupDescription(nameof(TickUnitVM.reduced_unit_group)));
-         ((ListCollectionView)TickUnitPresetsView).CustomSort = Comparer<double>.Default.wrap<double, TickUnitVM>(vm => vm.value).to_non_generic();
-      }
-
-      public static IEnumerable<double> TickBasePresets =>
-         new [] {
-            8, 16, 32, 64, 100
-         }.SelectMany(i => Enumerable.Range(0, 4).Select(log10 => i * Math.Pow(10, log10)));
-
-      public static IMultiValueConverter TickUnitVisibleTextConverter =>
-        ValueConverter.create((double tick_base, double tick_unit) => {
-           int display_digits = TickExtensions.display_digits(tick_base);
-           return ((int)(tick_unit)).ToString(new string('0', display_digits));
-        });
-
-      public static IValueConverter TickUnitHiddenTextConverter =>
-         ValueConverter.create((double tick_unit) => new string(tick_unit.ToString().SkipWhile(c => c != '.').ToArray()));
-
-      public static readonly DependencyProperty SelectedTickFactorsProperty =
-         WPFHelper.create_dp<TickFactors, TickFactorsPicker>(
-            nameof(SelectedTickFactors),
-            FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
-            (o, v) => o.Controller.load_from(v),
-            new TickFactors());
-
-      public TickFactors SelectedTickFactors {
-         get => GetValue(SelectedTickFactorsProperty) as TickFactors;
-         set => SetValue(SelectedTickFactorsProperty, value);
-      }
-
-      public TickFactorsController Controller { get; }
-
-      public ICollectionView TickBasePresetsView { get; } = CollectionViewSource.GetDefaultView(TickBasePresets.Select(v => new TickBaseVM(v)).ToList());
-      public ICollectionView TickUnitPresetsView { get; }
-
-      static IEnumerable<double> _get_tick_unit_presets(double tick_base) {
-         double reduced_base = MathUtils.factor_out(tick_base, 10, out int base_log10);
-         return reduced_base == 1 ?
-            _get_dbased_tick_unit_presets(base_log10) :
-            _get_2based_tick_unit_presets((int)Math.Log(reduced_base, 2), base_log10);
-      }
-
-      static IEnumerable<double> _get_2based_tick_unit_presets(int log2, int log10) =>
-         (log10 == 0 ? new[] { 1.0 } : _get_dbased_tick_unit_presets(log10)).Concat(
-            Enumerable.Range(1, log2 - 1).SelectMany(pow2 => {
-               double root = Math.Pow(2, pow2);
-               return Enumerable.Range(0, log10 + 1).Select(pow10 => root * Math.Pow(10, pow10));
-            }));
-
-      static IEnumerable<double> _get_dbased_tick_unit_presets(int log10) =>
-         Enumerable.Range(0, log10).SelectMany(_coins);
-
-      static IEnumerable<double> _coins(int pow10) {
-         double d = Math.Pow(10, pow10);
-         yield return d;
-         yield return 1.25 * d;
-         yield return 2.5 * d;
-         yield return 5.0 * d;
-      }
-
-      public class TickFactorsController : ViewModelBase, IValueFactoryVM<TickFactors> {
-         readonly TickFactorsPicker _view;
-         readonly Property<double> _tick_base, _tick_unit;
-
-         public TickFactorsController(TickFactorsPicker view) {
-            var init = (_view = view).SelectedTickFactors;
-            _tick_base = backing(nameof(tick_base), init.tick_base);
-            _tick_unit = backing(nameof(tick_unit), init.tick_unit);
-         }
-
-         public double tick_base {
-            get => _tick_base.Value;
-            set {
-               _tick_base.set(value);
-               WPFHelper.set_current_if_changed(_view, SelectedTickFactorsProperty, new TickFactors(value, tick_unit));
-               _view._tick_unit_presets.sync_with(_get_tick_unit_presets(value));
-            }
-         }
-         public double tick_unit {
-            get => _tick_unit.Value;
-            set {
-               _tick_unit.set(value);
-               WPFHelper.set_current_if_changed(_view, SelectedTickFactorsProperty, new TickFactors(tick_base, value));
-            }
-         }
-
-         public TickFactors create() => new TickFactors(tick_base, tick_unit);
-         public void load_from(TickFactors value) {
-            if (value != null) {
-               _tick_base.set(value.tick_base);
-               _tick_unit.set(value.tick_unit);
-            }
-         }
-      }
-
-      public class TickBaseVM : IEquatable<TickBaseVM> {
-         public TickBaseVM(double value) =>
-            this.value = value;
-
-         public double value { get; }
-         public double reduced_base_group => MathUtils.factor_out(value, 10);
-
-         public bool Equals(TickBaseVM other) => other != null && value == other.value;
-         public override bool Equals(object obj) => Equals(obj as TickBaseVM);
-         public override int GetHashCode() => value.GetHashCode();
-      }
-
-      public class TickUnitVM : IEquatable<TickUnitVM> {
-         public TickUnitVM(double value) =>
-            this.value = value;
-
-         public double value { get; }
-         public double reduced_unit_group {
-            get {
-               if (!MathUtils.is_int(value))
-                  return 1;
-               else return MathUtils.factor_out(value, 10, 5);
-            }
-         }
-
-         public bool Equals(TickUnitVM other) => other != null && value == other.value;
-         public override bool Equals(object obj) => Equals(obj as TickUnitVM);
-         public override int GetHashCode() => value.GetHashCode();
-      }
-   }
-}

src/client/spark/view/Controls/TickUpDown/TickUpDown.xaml.cs

@@ -23,42 +23,38 @@ namespace mbts.ui.controls {
       }
 
       protected override void OnPreviewKeyDown(KeyEventArgs e) {
-         if (EnableArrowKeyTick) {
-            switch (Keyboard.Modifiers) {
-               case ModifierKeys.None: {
-                     switch (e.Key) {
-                        case Key.Up:
-                           TickUpCommand.TryExecuteIfCan(TickUpParameter);
-                           e.Handled = true;
-                           break;
-                        case Key.Down:
-                           TickDownCommand.TryExecuteIfCan(TickDownParameter);
-                           e.Handled = true;
-                           break;
-                     }
+         switch (Keyboard.Modifiers) {
+            case ModifierKeys.None: {
+                  switch (e.Key) {
+                     case Key.Up:
+                        TickUpCommand.TryExecuteIfCan(TickUpParameter);
+                        e.Handled = true;
+                        break;
+                     case Key.Down:
+                        TickDownCommand.TryExecuteIfCan(TickDownParameter);
+                        e.Handled = true;
+                        break;
                   }
-                  break;
-               case ModifierKeys.Alt: {
-                     // see: https://stackoverflow.com/questions/3099472/previewkeydown-is-not-seeing-alt-modifiers
-                     switch (e.SystemKey) {
-                        case Key.Up:
-                           TickUpCommand.TryExecuteIfCan(TickUpAltParameter);
-                           e.Handled = true;
-                           break;
-                        case Key.Down:
-                           TickDownCommand.TryExecuteIfCan(TickDownAltParameter);
-                           e.Handled = true;
-                           break;
-                     }
+               }
+               break;
+            case ModifierKeys.Alt: {
+                  // see: https://stackoverflow.com/questions/3099472/previewkeydown-is-not-seeing-alt-modifiers
+                  switch (e.SystemKey) {
+                     case Key.Up:
+                        TickUpCommand.TryExecuteIfCan(TickUpAltParameter);
+                        e.Handled = true;
+                        break;
+                     case Key.Down:
+                        TickDownCommand.TryExecuteIfCan(TickDownAltParameter);
+                        e.Handled = true;
+                        break;
                   }
-                  break;
-            }
+               }
+               break;
          }
          base.OnPreviewKeyDown(e);
       }
 
-      public bool EnableArrowKeyTick { get; set; } = true;
-
       #region TickCommand
       public ICommand TickCommand {
          get { return (ICommand)GetValue(TickCommandProperty); }

src/client/spark/view/Controls/Time/DateTimePicker.xaml

@@ -31,14 +31,8 @@
               <ColumnDefinition Width="Auto"/>
               <ColumnDefinition/>
             </Grid.ColumnDefinitions>
-            <c:TickUpDown x:Name="PART_time_tick" Grid.Column="0" MinWidth="85" HorizontalAlignment="Stretch" EnableArrowKeyTick="False">
-              <TextBox x:Name="PART_time_text" Height="20" u:TextBoxBehavior.EnableArrowKeyTraverse="True" u:Behavior.DisablePaste="True">
-                <TextBox.InputBindings>
-                  <KeyBinding Key="Up" Command="{x:Static c:DateTimePicker.TickTimeComponentCommand}" CommandParameter="{u:Int 1}"/>
-                  <KeyBinding Key="Down" Command="{x:Static c:DateTimePicker.TickTimeComponentCommand}" CommandParameter="{u:Int -1}"/>
-                  <u:CustomInputBinding Gesture="{x:Static u:InputGestures.LeftTripleClick}" Command="{x:Static u:TextBoxBehavior.SelectAllCommand}"/>
-                </TextBox.InputBindings>
-              </TextBox>
+            <c:TickUpDown x:Name="PART_time_tick" Grid.Column="0" MinWidth="85" HorizontalAlignment="Stretch">
+              <TextBox x:Name="PART_time_text" Height="20" u:TextBoxBehavior.EnableArrowKeyTraverse="True" u:Behavior.DisablePaste="True"/>
             </c:TickUpDown>
             <c:TickUpDown x:Name="PART_month_tick" Grid.Column="2" Width="50">
               <TextBox x:Name="PART_month_text" Height="20" u:TextBoxBehavior.EnableArrowKeyTraverse="True" u:Behavior.DisablePaste="True"/>

src/client/spark/view/Controls/Time/DateTimePicker.xaml.cs

@@ -3,7 +3,6 @@ using mbts.ui.shell;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
-using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
@@ -15,9 +14,7 @@ namespace mbts.ui.controls {
    /// Interaction logic for DateTimePicker.xaml
    /// </summary>
    public class DateTimePicker : Control {
-      public static readonly RoutedCommand TickTimeComponentCommand = new RoutedCommand();
-
-      DTPController _controller;
+      TimeTupleVM _vm;
       bool _suspend_notify_vm;
 
       static DateTimePicker() =>
@@ -27,8 +24,8 @@ namespace mbts.ui.controls {
          new FrameworkPropertyMetadata(default(TimeTextTuple), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnTimeTupleChanged));
       static void OnTimeTupleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
          var dtp = (DateTimePicker)d;
-         if (!dtp._suspend_notify_vm && dtp._controller != null)
-            dtp._controller.result = (TimeTextTuple)e.NewValue;
+         if (!dtp._suspend_notify_vm && dtp._vm != null)
+            dtp._vm.result = (TimeTextTuple)e.NewValue;
       }
       public TimeTextTuple TimeTuple { get => (TimeTextTuple)GetValue(TimeTupleProperty); set => SetValue(TimeTupleProperty, value); }
 
@@ -44,74 +41,59 @@ namespace mbts.ui.controls {
          var time = this.assert_template_child<TickUpDown>("PART_time_tick");
          var time_text = this.assert_template_child<TextBox>("PART_time_text");
 
-         if (_controller != null) _controller.PropertyChanged -= _vm_PropertyChanged;
-         _controller = new DTPController(time_text);
-         _controller.result = TimeTuple;
-         _controller.PropertyChanged += _vm_PropertyChanged;
-         time.CommandBindings.Add(new CommandBinding(TickTimeComponentCommand, (s, e) => {
-            _controller.tick_time_component((int)e.Parameter);
-         }));
-         time.CommandBindings.Add(new CommandBinding(TextBoxBehavior.SelectAllCommand, TextBoxBehavior.SelectAllCommandExecutedHandler));
+         if (_vm != null) _vm.PropertyChanged -= _vm_PropertyChanged;
+         _vm = new TimeTupleVM();
+         _vm.result = TimeTuple;
+         _vm.PropertyChanged += _vm_PropertyChanged;
 
          const int delay = 500;
-         time.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_time") { Source = _controller });
+         time.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_time") { Source = _vm });
          time.TickUpParameter = 1;
          time.TickDownParameter = -1;
          time.TickUpAltParameter = 60;
          time.TickDownAltParameter = -60;
-         time_text.SetBinding(TextBox.TextProperty, new Binding("time_text") { Source = _controller, Delay = delay, ValidatesOnExceptions = true });
-         _hooks.Add(time_text.SubscribePreviewTextInput((s, e) => {
-            string preview = time_text.PeekText(e);
-            if (RegexFilters.Time.StandardTimeOptionalSeconds.IsMatch(preview)) {
-               _controller.use_military_time = false;
-            } else if (RegexFilters.Time.MilitaryTimeOptionalSeconds.IsMatch(preview)) {
-               _controller.use_military_time = true;
-            } else {
-               e.Handled = true;
-            }
-         }));
+         time_text.SetBinding(TextBox.TextProperty, new Binding("time_text") { Source = _vm, Delay = delay, ValidatesOnExceptions = true });
+         _hooks.Add(time_text.SubscribePreviewTextInput((s, e) =>
+            e.Handled = !MatchAny(time_text.PeekText(e), RegexFilters.Time.StandardTime, RegexFilters.Time.MilitaryTime)
+         ));
 
-         month.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_month") { Source = _controller });
+         month.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_month") { Source = _vm });
          month.TickUpParameter = 1;
          month.TickDownParameter = -1;
-         month_text.SetBinding(TextBox.TextProperty, new Binding("month_text") { Source = _controller, Delay = delay });
+         month_text.SetBinding(TextBox.TextProperty, new Binding("month_text") { Source = _vm, Delay = delay });
          _hooks.Add(month_text.SubscribePreviewTextInput((s, e) =>
             e.Handled = !RegexFilters.Time.MonthAbbrev.IsMatch(month_text.PeekText(e))
          ));
 
-         day.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_day") { Source = _controller });
+         day.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_day") { Source = _vm });
          day.TickUpParameter = 1;
          day.TickDownParameter = -1;
-         day_text.SetBinding(TextBox.TextProperty, new Binding("day_text") { Source = _controller, Delay = delay });
+         day_text.SetBinding(TextBox.TextProperty, new Binding("day_text") { Source = _vm, Delay = delay });
          _hooks.Add(day_text.SubscribePreviewTextInput((s, e) =>
             e.Handled = !RegexFilters.Time.DaysInMonth.IsMatch(day_text.PeekText(e))
          ));
 
-         year.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_year") { Source = _controller });
+         year.SetBinding(TickUpDown.TickCommandProperty, new Binding("tick_year") { Source = _vm });
          year.TickUpParameter = 1;
          year.TickDownParameter = -1;
-         year_text.SetBinding(TextBox.TextProperty, new Binding("year_text") { Source = _controller, Delay = delay });
+         year_text.SetBinding(TextBox.TextProperty, new Binding("year_text") { Source = _vm, Delay = delay });
          _hooks.Add(year_text.SubscribePreviewTextInput((s, e) =>
             e.Handled = !RegexFilters.Time.Year.IsMatch(year_text.PeekText(e))
          ));
       }
 
       void _vm_PropertyChanged(object sender, PropertyChangedEventArgs e) {
-         if (e.PropertyName == nameof(DTPController.result)) {
+         if (e.PropertyName == nameof(TimeTupleVM.result)) {
             _suspend_notify_vm = true;
-            TimeTuple = _controller.result;
+            TimeTuple = _vm.result;
             _suspend_notify_vm = false;
          }
       }
 
-      // This is not exactly a view-model, bc it accesses the time TextBox directly so it can get/set the CaretIndex,
-      // which is used to determine which time-componenet - hh:mm:ss AM/PM - should be incremented/decremented via the up/down arrow-keys.
-      class DTPController : ViewModelBase {
-         readonly TextBox _time_text_box;
+      private class TimeTupleVM : ViewModelBase {
          TimeTextTuple _result;
 
-         public DTPController(TextBox time_text_box) {
-            _time_text_box = time_text_box;
+         public TimeTupleVM() {
             tick_time = new DelegateCommand<int>(_tick_time);
             tick_month = new DelegateCommand<int>(_tick_month);
             tick_day = new DelegateCommand<int>(_tick_day);
@@ -153,52 +135,12 @@ namespace mbts.ui.controls {
                RaisePropertyChanged(nameof(month_text), nameof(day_text), nameof(year_text), nameof(time_text));
             }
          }
-
-         public bool use_military_time { get; set; }
          public ICommand tick_time { get; }
          public ICommand tick_month { get; }
          public ICommand tick_day { get; }
          public ICommand tick_year { get; }
-         string _time_format => use_military_time ? StringFormats.Time.MilitaryWithSeconds : StringFormats.Time.StandardWithSeconds;
 
-         public void tick_time_component(int increment) {
-            _ensure_time_text_up_to_date();
-            var r = _result.result;
-            if (r.HasValue) {
-               int index = _time_text_box.CaretIndex;
-               using (detect_property_changes()) {
-                  DateTime dt;
-                  if (index <= 0) {
-                     dt = r.Value.AddHours(increment);
-                  } else {
-                     int segment = _time_text_box.Text.Take(index).Count(c => c == ':');
-                     switch (segment) {
-                        case 0: dt = r.Value.AddHours(increment); break;
-                        case 1: dt = r.Value.AddMinutes(increment); break;
-                        case 2:
-                           if (_time_text_box.Text.Take(index).Contains(' ')) {
-                              // toggle AM/PM
-                              dt = r.Value.AddHours(r.Value.Hour < 12 ? 12 : -12);
-                           } else {
-                              dt = r.Value.AddSeconds(increment);
-                           }
-                           break;
-                        default:
-                           dt = r.Value.AddSeconds(increment);
-                           break;
-                     }
-                  }
-                  _result = TimeTextTuple.FromDateTime(dt, _time_format);
-               }
-               _time_text_box.CaretIndex = index;
-            } else {
-               using (detect_property_changes())
-                  _force_valid_inputs();
-            }
-         }
- 
          void _tick_time(int increment) {
-            _ensure_time_text_up_to_date();
             using (detect_property_changes()) {
                var r = _result.result;
                if (r.HasValue) {
@@ -245,11 +187,6 @@ namespace mbts.ui.controls {
                }
             }
          }
- 
-         void _ensure_time_text_up_to_date() {
-            if (_time_text_box.IsKeyboardFocused)
-               _time_text_box.GetBindingExpression(TextBox.TextProperty)?.UpdateSource();
-         }
 
          void _force_valid_inputs() {
             var dt = DateTime.Today.Date;

src/client/spark/view/Converters/AnonymousValueConverter.cs

@@ -2,15 +2,8 @@
 using System.Globalization;
 using System.Windows.Data;
 
-namespace mbts.ui.converters {
-   static class ValueConverter {
-      public static IValueConverter create<TIn, TOut>(Func<TIn, TOut> convert) =>
-         new AnonymousValueConverter<TIn, TOut>(convert);
-
-      public static IMultiValueConverter create<TIn1, TIn2, TOut>(Func<TIn1, TIn2, TOut> convert) =>
-         new AnonymousMultiValueConverter<TIn1, TIn2, TOut>(convert);
-   }
-
+namespace mbts.ui.converters
+{
    public class AnonymousValueConverter : IValueConverter {
       public AnonymousValueConverter(Func<object, object> convert) : this(convert, null) { }
       public AnonymousValueConverter(Func<object, object> convert, Func<object, object> convert_back) {

src/client/spark/view/Converters/EnumCharacterCasingConverter.cs

@@ -8,7 +8,6 @@ namespace mbts.ui.converters
    internal class EnumCharacterCasingConverter : IValueConverter
    {
       public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
-         if (value is null) return string.Empty;
          string s = value is Enum ? EnumHelper.get_display_name((Enum)value) : value.ToString();
 
          CharacterCasing casing;

src/client/spark/view/Converters/Numeric/DoubleTextConverter.cs

@@ -13,6 +13,7 @@ namespace mbts.ui.converters
          Minimum = Double.NaN;
          Maximum = Double.NaN;
          Multiplier = Double.NaN;
+         Format = FORMAT_WITH_COMMAS;
          HideNaN = true;
       }
 

src/client/spark/view/Converters/TickFactorsTextConverter.cs

@@ -7,7 +7,7 @@ namespace mbts.ui.converters {
    class TickFactorsTextConverter : IValueConverter {
       public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
          if (value is TickFactors tf) {
-            int n_digits = tf.display_digits();
+            int n_digits = TickExtensions.n_display_digits(tf.tick_base);
             if (n_digits > 1) {
                string n_digits_format = new string('0', n_digits);
                string format = "{0:" + n_digits_format + "}/{1}";

src/client/spark/view/DragDrop/DragDropHelper.cs

@@ -61,16 +61,16 @@ namespace mbts.ui
          _source_window = window as FloatingWindow;
          if (_source != null) {
             _mouse_start = e.GetPosition(window);
-            if (!is_clickable_descendant((DependencyObject)e.OriginalSource)) {
+            if (!is_button_descendant((DependencyObject)e.OriginalSource)) {
                Mouse.Capture(_source);
             }
          }
       }
 
-      static bool is_clickable_descendant(DependencyObject target) {
+      static bool is_button_descendant(DependencyObject target) {
          while (target != null && !(target is TabDocument)) {
             target = VisualTreeHelper.GetParent(target);
-            if (target is Button || target is TextBox) return true;
+            if (target is Button) return true;
          }
          return false;
       }

src/client/spark/view/Extensions/AsyncExtensions.cs

@@ -24,7 +24,38 @@ namespace mbts.ui
          }
       }
 
-      public static async Task<Tuple<T1,T2>> FromEvent<T1,T2>(this DependencyObject target, string event_name) {
+      public static async Task FromEvent(this object target, string event_name) {
+         var evt = target.GetType().GetEvent(event_name);
+         var delegate_type = evt.EventHandlerType;
+         var tcs = new TaskCompletionSource<object>();
+         Action result = () => { tcs.TrySetResult(null); };
+         var d = Delegate.CreateDelegate(evt.EventHandlerType, result, "Invoke");
+         try {
+            evt.AddEventHandler(target, d);
+            await tcs.Task;
+         }
+         finally {
+            evt.RemoveEventHandler(target, d);
+         }
+      }
+
+      public static async Task<T> FromEvent<T>(this object target, string event_name) {
+         var evt = target.GetType().GetEvent(event_name);
+         var delegate_type = evt.EventHandlerType;
+         var tcs = new TaskCompletionSource<T>();
+         Action<T> result = (arg) => { tcs.TrySetResult(arg); };
+         var d = Delegate.CreateDelegate(evt.EventHandlerType, result, "Invoke");
+         try {
+            evt.AddEventHandler(target, d);
+            await tcs.Task;
+            return tcs.Task.Result;
+         }
+         finally {
+            evt.RemoveEventHandler(target, d);
+         }
+      }
+
+      public static async Task<Tuple<T1,T2>> FromEvent<T1,T2>(this object target, string event_name) {
          var evt = target.GetType().GetEvent(event_name);
          var delegate_type = evt.EventHandlerType;
          var tcs = new TaskCompletionSource<Tuple<T1,T2>>();

src/client/spark/view/Extensions/FrameworkElementLifeDependency.cs

@@ -70,7 +70,7 @@ namespace mbts.ui
 
       private void _subscribe() {
          Disposable.dispose(ref _sub);
-         _sub = _source.OnDispatcher().Subscribe(_on_data);
+         _sub = _source.ObserveOnDispatcher().Subscribe(_on_data);
       }
       private void _on_data(T data) { Target.SetValue(_target_property, _last_value = data); }
 

src/client/spark/view/Extensions/InputGestures.cs

@@ -1,16 +0,0 @@
-using System.Windows.Input;
-
-namespace mbts.ui {
-   class CustomInputBinding : InputBinding { }
-
-   static class InputGestures {
-      public static readonly InputGesture LeftTripleClick = new LeftTripleClickGesture();
-
-      class LeftTripleClickGesture : InputGesture {
-         public override bool Matches(object targetElement, InputEventArgs inputEventArgs) =>
-            inputEventArgs is MouseButtonEventArgs mouse_args &&
-            mouse_args.ChangedButton == MouseButton.Left &&
-            mouse_args.ClickCount == 3;
-      }
-   }
-}

src/client/spark/view/Extensions/TextElement/TextBoxBehavior.cs

@@ -7,14 +7,7 @@ using System.Windows.Input;
 
 namespace mbts.ui {
    static class TextBoxBehavior {
-      #region RoutedCommands/Handlers
-      public static readonly RoutedCommand
-         ReleaseCaptureCommand = new RoutedCommand(),
-         SelectAllCommand = new RoutedCommand();
-
-      public static readonly ExecutedRoutedEventHandler SelectAllCommandExecutedHandler =
-         new ExecutedRoutedEventHandler((s, e) => (e.OriginalSource as TextBox ?? e.Source as TextBox ?? s as TextBox)?.SelectAll());
-      #endregion
+      public static readonly RoutedCommand ReleaseCaptureCommand = new RoutedCommand();
 
       #region SelectAllOnFocus
 
@@ -175,7 +168,7 @@ namespace mbts.ui {
       public static void SetInputFilter(DependencyObject d, TextBoxInputFilter value) => d.SetValue(InputFilterProperty, value);
       #endregion
 
-      #region IncrementDecrementOnMouseClick
+      #region
       public static readonly DependencyProperty IncrementDecrementOnMouseClickProperty = DependencyProperty.RegisterAttached(
          "IncrementDecrementOnMouseClick", typeof(bool), typeof(TextBoxBehavior), new PropertyMetadata(false, IncrementDecrementOnMouseClickPropertyChanged)
          );

src/client/spark/view/Extensions/TextElement/TextElementHelper.cs

@@ -2,28 +2,11 @@
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
-using System.Windows.Input;
-
-namespace mbts.ui {
-   static class TextElementHelper {
-      public static IDisposable SubscribeKeyboardFocus(this TextBox text_box, Action<bool> callback) {
-         text_box.GotKeyboardFocus += on_got_keyboard_focus;
-         text_box.LostKeyboardFocus += on_lost_keyboard_focus;
-         return Disposable.Create(() => {
-            text_box.GotKeyboardFocus -= on_got_keyboard_focus;
-            text_box.LostKeyboardFocus -= on_lost_keyboard_focus;
-         });
-         void on_got_keyboard_focus(object sender, KeyboardFocusChangedEventArgs e) {
-            if (e.NewFocus == text_box)
-               callback(true);
-
-         }
-         void on_lost_keyboard_focus(object sender, KeyboardFocusChangedEventArgs e) {
-            if (e.OldFocus == text_box)
-               callback(false);
-         }
-      }
 
+namespace mbts.ui
+{
+   public class TextElementHelper
+   {
       public static void GetTargetProperty(DependencyObject d, out FrameworkElement text_element, out DependencyProperty text_property) {
          text_element = (FrameworkElement)d;
          if (text_element is TextBox) text_property = TextBox.TextProperty;

src/client/spark/view/Resources/WindowStyle.xaml

@@ -22,7 +22,7 @@
     <Setter Property="Template">
       <Setter.Value>
         <ControlTemplate TargetType="{x:Type Window}">
-          <Border BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" Loaded="style_loaded" x:Name="window_border" u:WindowStyle.IsNonClientArea="true">
+          <Border BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" Loaded="style_loaded" x:Name="window_border" u:WindowStyle.IsNonClientArea="true">
             <Grid Margin="{TemplateBinding Margin}">
               <Grid.RowDefinitions>
                 <RowDefinition Height="20" />
@@ -134,8 +134,8 @@
           </Border>
           <ControlTemplate.Triggers>
             <DataTrigger Binding="{Binding Path=WindowState, RelativeSource={RelativeSource self}}" Value="Normal">
-              <Setter Property="Padding" Value="0,0,2,2" />
-              <Setter Property="BorderThickness" Value="7,1,1,1" TargetName="window_border" />
+              <Setter Property="Padding" Value="0,0,0,0" />
+              <Setter Property="BorderThickness" Value="7,1,2.66,2.66" TargetName="window_border" />
             </DataTrigger>
           </ControlTemplate.Triggers>
         </ControlTemplate>