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PRISM+RadDock throws exception on Pinning a RadPaneGroup

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sonnet
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sonnet asked on 13 Jan 2012, 02:04 PM
Hi,
  I am using PRISM's region manager to load the docking panes in my main Shell screen. Here is the code I have in the main window xaml.
         <Grid>
        <telerik:RadDocking AllowUnsafeMode="True" Grid.Row="1">
 
            <telerik:RadDocking.DocumentHost>
                <!--<ItemsControl x:Name="CenterRadPanelGroup" prism:RegionManager.RegionName="Region_ShellCenter" Background="White"/>-->
                <telerik:RadSplitContainer Name="CenterRadPanelGroup"    prism:RegionManager.RegionName="{x:Static UICommon:Constants.REGION_SHELL_CENTER}"/>
            </telerik:RadDocking.DocumentHost>
 
            <telerik:RadSplitContainer InitialPosition="DockedLeft" Name="LeftRadPanelGroup" prism:RegionManager.RegionName="{x:Static UICommon:Constants.REGION_SHELL_LEFT}" />
            <telerik:RadSplitContainer InitialPosition="DockedRight" Name="RightRadPanelGroup"   prism:RegionManager.RegionName="{x:Static UICommon:Constants.REGION_SHELL_RIGHT}"/>
            <telerik:RadSplitContainer InitialPosition="DockedBottom" Name="BottomRadPanelGroup" prism:RegionManager.RegionName="{x:Static UICommon:Constants.REGION_SHELL_BOTTOM}"/>
        </telerik:RadDocking>
    </Grid>




And this is the usercontrol for RadSplitContainer docked Right in the shell.
<telerik:RadPaneGroup x:Class="MyClass"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
             xmlns:local="clr-namespace:Simulation.UI">
    <telerik:RadPane Header="1"/>
    <telerik:RadPane Header="2"/>
    <telerik:RadPane Header="3"/>
    <telerik:RadPane Header="4">
        <local:SimulationDataControl />
    </telerik:RadPane>
</telerik:RadPaneGroup>










The RadPaneGroup renders properly in the mainwindow.
But when I try to pin it, it throws the following exception.


Message :- Object reference not set to an instance of an object.

Source :- Telerik.Windows.Controls.Docking
StackTrace :-    at Telerik.Windows.Controls.RadDocking.GetState(ISplitItem item)
   at Telerik.Windows.Controls.RadDocking.OnRadPanePinChange(Object sender, PinChangeEventArgs args)

   at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at System.Windows.RoutedEventArgs.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.RaiseEvent(RoutedEventArgs e)
   at Telerik.Windows.Controls.RadPane.OnPinChange(PinChangeEventArgs args)
   at Telerik.Windows.Controls.RadPane.ChangePin(Boolean isPinned)
   at Telerik.Windows.Controls.RadPane.OnIsPinnedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.RadPane.set_IsPinned(Boolean value)
   at Telerik.Windows.Controls.Docking.PaneGroupBase.ExecuteCommand(RadPane pane, ICommand command, PaneGroupBase groupBase)
   at Telerik.Windows.Controls.Docking.PaneGroupBase.<>c__DisplayClass3.<OnPaneCommandInvoke>b__2()
   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.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, 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.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(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.Threading.Dispatcher.Run()
   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()

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George
Telerik team
answered on 18 Jan 2012, 12:48 PM
Hi, 


The RadDocking control doesn't support PRISM out of the box. What I would suggest is using the RadPaneGroup as prism regions. You could find additional information about how to use the RadDocking control with prism here:


Hope this helps.


Greetings,
George
the Telerik team

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sonnet
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answered on 26 Jan 2012, 03:47 PM
Thanks. Marking region at RadPaneGroup instead of RadSplitContainer solved the pinning problem.
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George
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sonnet
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