TabGroupPaneRegionAdapter

Aug 9, 2008 at 12:51 AM
Hi all,

I'm using the TabGroupRegionAdapter. I had previously created my own version of the control, but updated to yours as the source looked more extensive. I have run into a problem with it however, in that removing or closing a view and trying to reopen it results in the region throwing an exception "item already exists in the region". I'm guess that, perhaps, my views are not structured in a way to accommodate how you expect to remove views from regions.

Can you help fill me in on what I'm missing? Why aren't my views getting removed?

Thanks

Matt
Developer
Aug 11, 2008 at 4:58 AM
Hi Matt,

I think I was able to reproduce your issue.

editorRegion.Add(textEditorPresenter.View);        
editorRegion.Remove(textEditorPresenter.View);
editorRegion.Add(textEditorPresenter.View);

gives me the following exception  message : "Specified element is already the logical child of another element. Disconnect it first."
Is that the same you are getting ?

I am working on this one right now.

Thanks,
Claudio.
Aug 11, 2008 at 6:27 AM
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Name="Medium Grid 1 Accent 2"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 2"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 2"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 2"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 2"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 2"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 2"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 3"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 3"/> <w:LsdException 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Name="Medium Shading 2 Accent 4"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 4"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 4"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 4"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 4"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 4"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 4"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 4"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 4"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 4"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 5"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" Name="Light List Accent 5"/> <w:LsdException Locked="false" Priority="62" SemiHidden="false" UnhideWhenUsed="false" Name="Light Grid Accent 5"/> <w:LsdException Locked="false" Priority="63" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 1 Accent 5"/> <w:LsdException Locked="false" Priority="64" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Shading 2 Accent 5"/> <w:LsdException Locked="false" Priority="65" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 1 Accent 5"/> <w:LsdException Locked="false" Priority="66" SemiHidden="false" UnhideWhenUsed="false" Name="Medium List 2 Accent 5"/> <w:LsdException Locked="false" Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 5"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 5"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 5"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 5"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 5"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 5"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 5"/> <w:LsdException Locked="false" Priority="60" SemiHidden="false" UnhideWhenUsed="false" Name="Light Shading Accent 6"/> <w:LsdException Locked="false" Priority="61" SemiHidden="false" UnhideWhenUsed="false" 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Hey Claudio,


Thanks for the help. I really appreciate it. The exact error message is “View already exists in region.”. The error is happening in Region.InnerAdd. Here’s the stack trace:


at Microsoft.Practices.Composite.Wpf.Regions.Region.InnerAdd(Object view, String name, IRegionManager regionManager) in C:\Development\CompositeApplicationGuidance\Source\CAL\Composite.Wpf\Regions\Region.cs: line 199
at Microsoft.Practices.Composite.Wpf.Regions.Region.Add(Object view, String viewName, Boolean createRegionManagerScope) in C:\Development\CompositeApplicationGuidance\Source\CAL\Composite.Wpf\Regions\Region.cs: line 105
at Microsoft.Practices.Composite.Wpf.Regions.Region.Add(Object view) in C:\Development\CompositeApplicationGuidance\Source\CAL\Composite.Wpf\Regions\Region.cs: line 77
at AppName.UI.Presentation.Mvp.PresenterBase`1.ShowView() in PresenterBase.cs: line 31
at AppName.Modules.Event2.Main.EventPresenter.ShowView() in EventPresenter.cs: line 44
at AppName.Shell.ShellPresenter.View_OnRibbonButtonClicked(Object sender, RoutedEventArgs e) in ShellPresenter.cs: line 104
at AppName.btnMainUIRibbonButtonClick(Object sender, RoutedEventArgs e) in ShellView.xaml.cs: line 60
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(RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
at System.Windows.Controls.Primitives.ButtonBase.OnClick()
at Infragistics.Windows.Ribbon.ButtonTool.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.UIElement.OnMouseLeftButtonUpThunk(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.ReRaiseEventAs(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(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, Int32 msg, IntPtr wParam, IntPtr lParam, ref Boolean handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, ref Boolean handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, ref Boolean handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(ref MSG msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at AppName.App.Main() in App.g.cs: line 47
at System.AppDomain._nExecuteAssembly(Assembly 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)
at System.Threading.ThreadHelper.ThreadStart()


PresenterBase.ShowView is calling:


region.Add(View);

region.Activate(View);


Here’s my Shell XAML:


<DockManager:XamDockManager Grid.Column="0" Grid.Row="1">

     <DockManager:XamDockManager.Panes>

          <DockManager:SplitPane DockManager:XamDockManager.InitialLocation="DockedBottom" Panel.ZIndex="1" DockPanel.Dock="Bottom">

               <DockManager:TabGroupPane

                Regions1:RegionManager.RegionName="{x:Static Regions:ShellRegions.MainRegion}"/>

          </DockManager:SplitPane>

     </DockManager:XamDockManager.Panes>

     <DockManager:DocumentContentHost>

          <DockManager:SplitPane>

                <DockManager:TabGroupPane />

          </DockManager:SplitPane>

     </DockManager:DocumentContentHost>

</DockManager:XamDockManager>


My views are just derived from UserControl with the following code in the codebehind:


ITabGroupPaneMetadata tabGroupPaneMetadata = new TabGroupPaneMetadata();

tabGroupPaneMetadata.Header = "Event Viewer";

this.SetTabGroupPaneMetadata(tabGroupPaneMetadata);


Hope this is enough info. Thanks a lot for the help,


Matt Walters

Developer
Aug 11, 2008 at 11:23 PM
Hi Matt,

Sorry for the delay in my answer but I had a complicated day .

I modified Composite WPF Hello World sample to load 2 views using the TabGroupPaneRegionAdapter but I  don't get your error there.
I only get the exception ""Specified element is already the logical child of another element. Disconnect it first." when trying adding / removing / adding the same view. But as I understand that's not you error.
I will contact you directly son I can send you my HelloWorld sample for you to see it or maybe you can send me yours so I can elaborate further.

Thanks,
Claudio.
Developer
Aug 12, 2008 at 7:08 PM
Hi Matt,

Just to let you know, that I elaborated further my sample and I was able to reproduce your issue.
To solve I will need to extend the TabGroupPaneRegionAdapter behaviors to consider the case when a ContentPane is closed.

I will keep you posted.

Thanks,
Claudio.