allow assign graphControl.Graph = null and reassign graph

microsoft · Dec 2, 2024 · f8270e6 · f8270e6
1 parent 94e52ec
commit f8270e6
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Showing 2 changed files with 5 additions and 6 deletions.
diff --git a/GraphLayout/tools/WpfGraphControl/AutomaticGraphLayoutControl.xaml.cs b/GraphLayout/tools/WpfGraphControl/AutomaticGraphLayoutControl.xaml.cs
@@ -15,12 +15,8 @@ public Graph Graph {
         public static readonly DependencyProperty GraphProperty =
             DependencyProperty.Register("Graph", typeof(Graph), typeof(AutomaticGraphLayoutControl), new PropertyMetadata(default(Graph),
                 (d,e)=> ((AutomaticGraphLayoutControl)d)?.SetGraph()));
-     
+
         private void SetGraph() {
-            if (Graph == null) {
-                dockPanel.Children.Clear();
-                return;
-            }
             if (_graphViewer == null) {
                 _graphViewer = new GraphViewer();
                 _graphViewer.BindToPanel(dockPanel);

diff --git a/GraphLayout/tools/WpfGraphControl/GraphViewer.cs b/GraphLayout/tools/WpfGraphControl/GraphViewer.cs
@@ -746,7 +746,10 @@ void ProcessGraphUnderLock() {
 
                 CancelToken = new CancelToken();
 
-                if (_drawingGraph == null) return;
+                if (_drawingGraph == null) {
+                    ClearGraphViewer();
+                    return;
+                }
 
                 HideCanvas();
                 ClearGraphViewer();