Switch layout when switching RadDocumentPane?

[Kristoffer]

I have some RadDocumentPanes. When I opening a document (RadDocumentPane) of some type, I want to load a different layout. How can this be done?

I tried switching layout in the ActivePaneChanged event, but this throws an InvalidOperationException. Please help!

private void dockingPaneManager_ActivePaneChanged(object sender,
    Telerik.Windows.Controls.Docking.ActivePangeChangedEventArgs e)

{

    if (e.NewPane == pane1)

        LoadLayout(Properties.Resources.Pane1);

    else if (e.NewPane == pane2)

         LoadLayout(Properties.Resources.Pane2);

    else if (e.NewPane == pane3)

         LoadLayout(Properties.Resources.Pane3);

}

<telerik:RadDocking x:Name="dockingPaneManager" ActivePaneChanged="dockingPaneManager_ActivePaneChanged">
<telerik:RadDocking.DocumentHost>
  <telerik:RadSplitContainer>
    <telerik:RadPaneGroup>
      <telerik:RadDocumentPane x:Name="pane1" Title="1st" telerik:RadDocking.SerializationTag="Pane1">
        <telerik:RadDocumentPane.Content>
          ... some content ...
        </telerik:RadDocumentPane.Content>
      </telerik:RadDocumentPane>
      <telerik:RadDocumentPane x:Name="pane2" Title="2nd" telerik:RadDocking.SerializationTag="Pane2">
        <telerik:RadDocumentPane.Content>
          ... some content ...
        </telerik:RadDocumentPane.Content>
      </telerik:RadDocumentPane>
      <telerik:RadDocumentPane x:Name="pane3" Title="3rd" telerik:RadDocking.SerializationTag="Pane3">
        <telerik:RadDocumentPane.Content>
          ... some content ...
        </telerik:RadDocumentPane.Content>
      </telerik:RadDocumentPane>
    </telerik:RadPaneGroup>
  </telerik:RadSplitContainer>
</telerik:RadDocking.DocumentHost>


This is the thrown exception:
---------------------------

---------------------------
System.InvalidOperationException: The specified Visual is not an ancestor of this Visual.

   at System.Windows.Media.Visual.TrySimpleTransformToAncestor(Visual ancestor, Boolean inverse, GeneralTransform& generalTransform, Matrix& simpleTransform)

   at System.Windows.Media.Visual.InternalTransformToAncestor(Visual ancestor, Boolean inverse)

   at Telerik.Windows.Controls.ApplicationHelper.TransformToScreenRoot(UIElement target) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\Common\ApplicationHelper.cs:line 285

   at Telerik.Windows.Controls.RadPane.GetDraggableArea(Boolean allowDragReorder) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Docking\Docking\Docking\RadPane.cs:line 1378

   at Telerik.Windows.Controls.RadPane.OnHeaderMouseLeftButtonDown(Object sender, MouseButtonEventArgs e) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Docking\Docking\Docking\RadPane.cs:line 886

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   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.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   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.Input.InputManager.ProcessStagingArea()

   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)
---------------------------
OK  
---------------------------

[Vladi]

Hi Kristoffer,

We are not sure what exactly you are trying to achieve but changing the content of a Pane in the ActivePaneChanged is not a good approach. The content of a RadPane should be set when you first load the control or when you load the layout of the control. If you want to change the content of a Pane it is better to remove that Pane and add a new one with the new content.

Hope this is helpful.

If you have any other questions on this case could you send us a runnable project so we can observe the exact scenario you are trying to achieve?

All the best,
Vladi
the Telerik team