Object graph - zoom using Ctrl+mouse wheel. Fixed edge labels.

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Controls/DragScrollViewer.cs

@@ -22,9 +22,15 @@ namespace Debugger.AddIn.Visualizers.Controls
 			this.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
 			this.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;
 			
-			this.PreviewMouseDown += new System.Windows.Input.MouseButtonEventHandler(DragScrollViewer_PreviewMouseDown);
+			this.PreviewMouseDown += DragScrollViewer_PreviewMouseDown;
-			this.PreviewMouseMove += new System.Windows.Input.MouseEventHandler(DragScrollViewer_PreviewMouseMove);
+			this.PreviewMouseMove += DragScrollViewer_PreviewMouseMove;
-			this.PreviewMouseUp += new System.Windows.Input.MouseButtonEventHandler(DragScrollViewer_PreviewMouseUp);
+			this.PreviewMouseUp += DragScrollViewer_PreviewMouseUp;
+			this.MouseWheel += DragScrollViewer_MouseWheel;
+		}
+
+		void DragScrollViewer_MouseWheel(object sender, MouseWheelEventArgs e)
+		{
+			MessageBox.Show("w");
 		}
 
 		void DragScrollViewer_PreviewMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/GraphDrawer.cs

@@ -137,8 +137,7 @@ namespace Debugger.AddIn.Visualizers.Graph
 		
 		Path AddEdgeToCanvas(PositionedEdge edge)
 		{
-			PathFigure edgeSplineFigure = CreateEdgeSpline(edge);
+			var edgeSplineFigure = CreateEdgeSpline(edge);
-
 			PathGeometry geometryVisible = new PathGeometry();
 			geometryVisible.Figures.Add(edgeSplineFigure);
 			geometryVisible.Figures.Add(CreateEdgeArrow(edge));
@@ -149,6 +148,11 @@ namespace Debugger.AddIn.Visualizers.Graph
 			pathVisible.StrokeThickness = 1;
 			pathVisible.Data = geometryVisible;
 			
+			// remember this spline Path at PositionedEdge to be able to highlight edge from PositionedNodeProperty
+			edge.Spline = pathVisible;
+			// and remember the the edge for the spline, so that we can get edge name on spline mouse-over
+			pathVisible.Tag = edge;
+			
 			PathGeometry geometryInVisible = new PathGeometry();
 			geometryInVisible.Figures.Add(edgeSplineFigure);
 			
@@ -179,12 +183,9 @@ namespace Debugger.AddIn.Visualizers.Graph
 				Canvas.SetTop(this.edgeTooltip, mousePos.Y - 20);
 			};
 			
-			// remember this spline Path at PositionedEdge to be able to highlight edge from PositionedNodeProperty
-			edge.Spline = pathVisible;
-			
 			canvas.Children.Add(pathVisible);
 			canvas.Children.Add(pathInVisible);
-			pathVisible.Tag = edge;
+			
 			return pathVisible;
 		}
 		

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/GraphEdgeRouter.cs

@@ -23,12 +23,9 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 		
 		public void RouteEdges(PositionedGraph posGraph)
 		{
-			List<RoutedEdge> routedEdges = router.RouteEdges(posGraph.Nodes, posGraph.Edges);
+			Dictionary<PositionedEdge, RoutedEdge> routedEdges = router.RouteEdges(posGraph.Nodes, posGraph.Edges);
-			int i = 0;
+			foreach (var edgePair in routedEdges) {
-			// assume routedEdges come in the same order as posGraph.Edges
+				SetEdgeSplinePoints(edgePair.Key, edgePair.Value);
-			foreach (var edge in posGraph.Edges) {
-				SetEdgeSplinePoints(edge, routedEdges[i]);
-				i++;
 			}
 		}
 		

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/PositionedEdge.cs

@@ -19,14 +19,8 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 		/// </summary>
 		public IList<Point> SplinePoints
 		{
-			get 
+			get { return splinePoints;	}
-			{
+			set { splinePoints = value;	}
-				return splinePoints;
-			}
-			set 
-			{
-				splinePoints = value;
-			}
 		}
 		
 		/// <summary>
@@ -35,15 +29,11 @@ namespace Debugger.AddIn.Visualizers.Graph.Layout
 		public System.Windows.Shapes.Path Spline { get; set; }
 		
 		public SplineRouting.IRect From {
-			get {
+			get { return this.Source.ContainingNode; }
-				return this.Source.ContainingNode;
-			}
 		}
 		
 		public SplineRouting.IRect To {
-			get {
+			get { return this.Target; }
-				return this.Target;
-			}
 		}
 	}
 }

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/EdgeRouter.cs

@@ -16,24 +16,25 @@ namespace Debugger.AddIn.Visualizers.Graph.SplineRouting
 		{
 		}
 		
-		public List<RoutedEdge> RouteEdges(IEnumerable<IRect> nodes, IEnumerable<IEdge> edges)
+		public Dictionary<TEdge, RoutedEdge> RouteEdges<TEdge>(IEnumerable<IRect> nodes, IEnumerable<TEdge> edges) where TEdge : class, IEdge
 		{
 			var routeGraph = RouteGraph.InitializeVertices(nodes, edges);
-			List<RoutedEdge> routedEdges = new List<RoutedEdge>();
+			var routedEdges = new Dictionary<TEdge, RoutedEdge>();
-			var occludedEdges = new List<IEdge>();
+			var occludedEdges = new List<TEdge>();
-			foreach (IEdge edge in edges)	{
+			foreach (var edge in edges) {
 				var straightEdge = routeGraph.TryRouteEdgeStraight(edge);
-				if (straightEdge != null)
+				if (straightEdge != null) {
-					routedEdges.Add(straightEdge);
+					routedEdges[edge] = straightEdge;
-				else
+				} else {
 					occludedEdges.Add(edge);
+				}
 			}
 			if (occludedEdges.Count > 0)	{
 				// there are some edges that couldn't be routed as straight lines
 				routeGraph.ComputeVisibilityGraph();
-				foreach (IEdge edge in occludedEdges) {
+				foreach (var edge in occludedEdges) {
 					RoutedEdge routedEdge = routeGraph.RouteEdge(edge);
-					routedEdges.Add(routedEdge);
+					routedEdges[edge] = routedEdge;
 				}
 			}
 			return routedEdges;

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/ObjectGraphControl.xaml

@@ -39,8 +39,10 @@
             </Border>
         </StackPanel>
 
-    	<controls:DragScrollViewer x:Name="scroller" Margin="0 4 0 0" Grid.Row="1" Grid.Column="0" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
+    	<controls:DragScrollViewer x:Name="scroller" Margin="0 4 0 0" Grid.Row="1" Grid.Column="0" Background="White" PreviewMouseWheel="Canvas_MouseWheel" 
-       		<Canvas HorizontalAlignment="Left" VerticalAlignment="Top" Name="canvas" Margin="4">
+    		HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
+       		<Canvas x:Name="canvas" Margin="4"
+    				HorizontalAlignment="Left" VerticalAlignment="Top">
     			<Canvas.LayoutTransform>
 		            <ScaleTransform ScaleX="{Binding Path=Value, ElementName=zoomSlider}"
 		                            ScaleY="{Binding Path=Value, ElementName=zoomSlider}"/>

src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/ObjectGraphControl.xaml.cs

@@ -36,6 +36,8 @@ namespace Debugger.AddIn.Visualizers.Graph
 		private PositionedGraph currentPosGraph;
 		private GraphDrawer graphDrawer;
 		
+		static double mouseWheelZoomSpeed = 0.05;
+		
 		/// <summary> Long-lived map telling which graph nodes and content nodes the user expanded. </summary>
 		private Expanded expanded = new Expanded();
 
@@ -220,5 +222,12 @@ namespace Debugger.AddIn.Visualizers.Graph
 			e.Property.ObjectGraphProperty.TargetNode = null;
 			LayoutGraph(this.objectGraph);
 		}
+		
+		void Canvas_MouseWheel(object sender, MouseWheelEventArgs e)
+		{
+			if (Keyboard.Modifiers.HasFlag(ModifierKeys.Control)) {
+				zoomSlider.Value += e.Delta > 0 ? mouseWheelZoomSpeed : -mouseWheelZoomSpeed;
+			}
+		}
 	}
 }