How to Enable/Disable the TrackBall Behavior

[David]

Hi,

I'm version 2012.3.1017.40 and trying to enabled the TrackBar Behavior on a double-click on the chart's data area and then disable it with another double click.  I keep getting an exception when I try to disable it.  I'm wondering if this is a bug with the control, or is it the way I'm trying to disable it?

Here is how I'm trying to Enable/Disable the TrackBall behavior:

 

private void radCartesianChart1_MouseDoubleClick(object sender, MouseButtonEventArgs e)
    {

      int index = -1;

      for (int i = 0; i < radCartesianChart1.Behaviors.Count; i++)
      {
        if (radCartesianChart1.Behaviors[i] is ChartTrackBallBehavior)
        {
          index = i;
          break;
        }
      }

      var mousePosition = e.GetPosition(this);
      Telerik.Charting.DataTuple tuple = radCartesianChart1.ConvertPointToData(mousePosition);

      //make sure the double-click occurred in the chart data area
      if (Convert.ToSingle(tuple.FirstlValue) > 0 && Convert.ToSingle(tuple.SecondValue) > 0)
      {
        if (_ShowTrackBall == false)
        {
          //create the TrackBallBehavior and add
          if (index == -1)
          {
            ChartTrackBallBehavior tb = new ChartTrackBallBehavior();
            tb.ShowIntersectionPoints = true;
            tb.ShowTrackInfo = true;
            radCartesianChart1.Behaviors.Add(tb);

            _ShowTrackBall = true;
          }
        }
        else
        {
          if (index != -1)
          {
            ChartTrackBallBehavior tb = radCartesianChart1.Behaviors[index] as ChartTrackBallBehavior;
            radCartesianChart1.Behaviors.Remove(tb);

            _ShowTrackBall = false;
          }
        }
      }
    }

It throws an System.ArgumentNullException, {"Value cannot be null.\r\nParameter name: key"},  when I try to disable it with the following StackTrace:
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.ContainsKey(TKey key)
   at Telerik.Windows.Controls.ChartView.ChartTrackBallBehavior.GetPresenterToDataPointInfos(List`1 dataPointInfos) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartTrackBallBehavior.Branch.cs:line 697
   at Telerik.Windows.Controls.ChartView.ChartTrackBallBehavior.FilterDataPointsByClosestCategoryPerAxis(List`1 dataPointInfos) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartTrackBallBehavior.Branch.cs:line 674
   at Telerik.Windows.Controls.ChartView.ChartTrackBallBehavior.UpdateDataContext(ChartDataContext context) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartTrackBallBehavior.Branch.cs:line 371
   at Telerik.Windows.Controls.ChartView.ChartTrackBallBehavior.UpdateVisuals() in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartTrackBallBehavior.Branch.cs:line 345
   at Telerik.Windows.Controls.ChartView.ChartTrackBallBehavior.OnMouseMove() in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartTrackBallBehavior.Branch.cs:line 570
   at Telerik.Windows.Controls.ChartView.ChartTrackBallBehavior.AdornerContainerMouseMove(Object sender, MouseEventArgs e) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartTrackBallBehavior.Branch.cs:line 588
   at System.Windows.Input.MouseEventArgs.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.MouseDevice.Synchronize()
   at System.Windows.Input.MouseDevice.ChangeMouseCapture(IInputElement mouseCapture, IMouseInputProvider providerCapture, CaptureMode captureMode, Int32 timestamp)
   at System.Windows.Input.MouseDevice.Capture(IInputElement element, CaptureMode captureMode)
   at System.Windows.UIElement.CaptureMouse()
   at Telerik.Windows.Controls.ChartView.ChartPanAndZoomBehavior.AdornerContainerMouseLeftButtonDown(Object sender, MouseButtonEventArgs e) in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Controls\Chart\Visualization\Behaviors\ChartPanAndZoomBehavior.Branch.cs:line 256
   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.OnMouseDownThunk(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 MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.InvokeImpl(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 delete_TelerikGridViewTest.App.Main() in C:\Users\dkepple\documents\visual studio 2010\Projects\delete_TelerikGridViewTest\delete_TelerikGridViewTest\obj\x86\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.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

dd

Thanks,
David

[Petar Kirov]

Hi David,

I created a test application, using the MouseDoubleClick event handler you provided, but I could not reproduce the bug you are reporting. I have attached the sample project for reference.
Could you provide a modified version of the project by attaching it in a formal support thread, so that we can track-down the problem locally?

Regards,
Petar Kirov
the Telerik team

[David]

Hi Petar,

I was making lots of code changes to my application and magiclly this appears to have gone away :)

Thank for providing me a sample though.

David