MSAGL : 보이는 그래프 업데이트 (가장자리 추가)

Question

MSAGL을 테스트하기 위해 간단한 샘플 응용 프로그램을 구축 중이지만 그래프가 표시된 후에 가장자리를 추가하면 KeyNotFoundException이 발생합니다.

이것이 내가 어떻게 든 데이터를 새로 고쳐야 할 필요가 있다고 가정합니다. 또는 다른 접근법을 사용할 수도 있지만 어떻게해야할지 모릅니다.

샘플 :

private void MainWindow_Loaded(object sender, RoutedEventArgs e) { 
    GraphViewer graphViewer = new GraphViewer(); 
    graphViewer.BindToPanel(Panel); 
    Graph graph = new Graph(); 

    graph.AddEdge("A", "B"); 

    graphViewer.MouseUp += (s, ev) => 
    { 
     if (graphViewer.ObjectUnderMouseCursor != null) 
     { 
      graph.AddEdge("A", "C"); // BOOM! 
     } 
    }; 

    graph.Attr.LayerDirection = LayerDirection.LR; 
    graphViewer.Graph = graph; 
} 

예외 사항 :

System.Collections.Generic.KeyNotFoundException was unhandled 
    HResult=-2146232969 
    Message=The given key was not present in the dictionary. 
    Source=mscorlib 
    StackTrace: 
     at System.Collections.Generic.Dictionary`2.get_Item(TKey key) 
     at Microsoft.Msagl.WpfGraphControl.GraphViewer.<CreateVNode>b__1d(Edge e) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\tools\WpfGraphControl\GraphViewer.cs:line 1263 
     at Microsoft.Msagl.WpfGraphControl.VNode.<get_OutEdges>b__10(Edge e) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\tools\WpfGraphControl\VNode.cs:line 416 
     at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() 
     at Microsoft.Msagl.Drawing.LayoutEditor.<Edges>d__20.MoveNext() in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 597 
     at Microsoft.Msagl.Drawing.LayoutEditor.TheDefaultObjectDecoratorRemover(IViewerObject obj) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 454 
     at Microsoft.Msagl.Drawing.LayoutEditor.UnselectWithoutRemovingFromDragGroup(IViewerObject obj) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 573 
     at Microsoft.Msagl.Drawing.LayoutEditor.UnselectObjectForDragging(IViewerObject obj) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 567 
     at Microsoft.Msagl.Drawing.LayoutEditor.AnalyzeLeftMouseButtonClick() in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 498 
     at Microsoft.Msagl.Drawing.LayoutEditor.HandleMouseUpOnLayoutEnabled(MsaglMouseEventArgs args) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 865 
     at Microsoft.Msagl.Drawing.LayoutEditor.ViewerMouseUp(Object sender, MsaglMouseEventArgs args) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Drawing\LayoutEditing\LayoutEditor.cs:line 858 
     at System.EventHandler`1.Invoke(Object sender, TEventArgs e) 
     at Microsoft.Msagl.WpfGraphControl.GraphViewer.OnMouseUp(MouseEventArgs e) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\tools\WpfGraphControl\GraphViewer.cs:line 511 
     at Microsoft.Msagl.WpfGraphControl.GraphViewer.GraphCanvasRightMouseUp(Object sender, MouseButtonEventArgs e) in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\tools\WpfGraphControl\GraphViewer.cs:line 183 
     at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) 
     at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 
     at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) 
     at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
     at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent) 
     at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e) 
     at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) 
     at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) 
     at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) 
     at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
     at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) 
     at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) 
     at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) 
     at System.Windows.Input.InputManager.ProcessStagingArea() 
     at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) 
     at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) 
     at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) 
     at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
     at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
     at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) 
     at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) 
     at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) 
     at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) 
     at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs) 
     at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) 
     at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) 
     at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) 
     at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) 
     at System.Windows.Application.RunDispatcher(Object ignore) 
     at System.Windows.Application.RunInternal(Window window) 
     at System.Windows.Application.Run(Window window) 
     at System.Windows.Application.Run() 
     at MinWpfApp.App.Main() in c:\Users\br\Desktop\MSAGL\automatic-graph-layout-master\GraphLayout\Samples\MinWpfApp\obj\Debug\App.g.cs:line 0 
     at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) 
     at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 
     at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
     at System.Threading.ThreadHelper.ThreadStart_Context(Object state) 
     at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
     at System.Threading.ThreadHelper.ThreadStart() 
    InnerException: 

Answer 1

작동 내가 찾은 해결책은, 나중에 그것을 다시 연결 한 다음 그래프를 업데이트하고 전에 그래프 뷰어에서 그래프를 분리하는 것입니다.

private void MainWindow_Loaded(object sender, RoutedEventArgs e) { 
    GraphViewer graphViewer = new GraphViewer(); 
    graphViewer.BindToPanel(Panel); 
    Graph graph = new Graph(); 

    graph.AddEdge("A", "B"); 

    graphViewer.MouseUp += (s, ev) => 
    { 
     if (graphViewer.ObjectUnderMouseCursor != null) 
     { 
      graphViewer.Graph = null; 
      graph.AddEdge("A", "C"); 
      graphViewer.Graph = graph; 
     } 
    }; 

    graph.Attr.LayerDirection = LayerDirection.LR; 
    graphViewer.Graph = graph; 
} 

환상적인 애니메이션 효과는 없지만 효과가있는 것으로 보입니다.