From 5736d53187c1faf2a2ae94f9423325d2c176e5e5 Mon Sep 17 00:00:00 2001
From: mkonicek <martin.konicek@gmail.com>
Date: Mon, 14 Mar 2011 02:02:49 +0100
Subject: [PATCH] Object graph - highlights edge on node item mouse-over.

---
 .../Drawing/PositionedGraphNodeControl.xaml   |  7 ++++---
 .../PositionedGraphNodeControl.xaml.cs        | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml
index a74944e576..d274d416ee 100644
--- a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml
+++ b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml
@@ -29,6 +29,8 @@
             </ListView.Background>
             <ListView.ItemContainerStyle>
                 <Style TargetType="{x:Type ListViewItem}">
+                	<EventSetter Event="MouseEnter" Handler="ListViewItem_MouseEnter"></EventSetter>
+                	<EventSetter Event="MouseLeave" Handler="ListViewItem_MouseLeave"></EventSetter>
                     <Setter Property="Background" Value="Transparent" />
                     <Setter Property="Margin" Value="0"></Setter>
                     <Setter Property="BorderThickness" Value="1" />
@@ -54,7 +56,7 @@
                         </GridView.ColumnHeaderContainerStyle>
                 	    <!-- Databound item is ContentNode -->
                         <GridView.Columns>
-                        	 <!-- Expand button (either property or nested) -->
+                        	<!-- Expand button (either property or nested) -->
                             <GridViewColumn Header="Plus" Width="20">
                                 <GridViewColumn.CellTemplate>
                                     <DataTemplate>
@@ -73,11 +75,10 @@
                                                     Property="Visibility" Value="Collapsed"/>
                                             </DataTrigger>
                                         </DataTemplate.Triggers>
-											
                                     </DataTemplate>
                                 </GridViewColumn.CellTemplate>
                             </GridViewColumn>
-                        	 <!-- Name -->
+                        	<!-- Name -->
                             <GridViewColumn Header="Name" Width="60">
                                 <GridViewColumn.CellTemplate>
                                     <DataTemplate>
diff --git a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml.cs b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml.cs
index 7d6db2b99c..bdc37668ed 100644
--- a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml.cs
+++ b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Drawing/PositionedGraphNodeControl.xaml.cs
@@ -197,6 +197,25 @@ namespace Debugger.AddIn.Visualizers.Graph.Drawing
 			if (this.ContentNodeCollapsed != null)
 				this.ContentNodeCollapsed(this, new ContentNodeEventArgs(node));
 		}
+		
+		void ListViewItem_MouseEnter(object sender, MouseEventArgs e)
+		{
+			SetEdgeStrokeThickness((ListViewItem)e.Source, 2);
+		}
+
+		void ListViewItem_MouseLeave(object sender, MouseEventArgs e)
+		{
+			SetEdgeStrokeThickness((ListViewItem)e.Source, 1);
+		}
+		
+		void SetEdgeStrokeThickness(ListViewItem listViewItem, int thickness)
+		{
+			var clickedNode = (ContentNode)listViewItem.DataContext;
+			var propNode = clickedNode as ContentPropertyNode;
+			if (propNode != null && propNode.Property != null && propNode.Property.Edge != null && propNode.Property.Edge.Spline != null) {
+				propNode.Property.Edge.Spline.StrokeThickness = thickness;
+			}
+		}
 		#endregion
 	}
 }