Questions on UI for WPF Forum

1 answer

190 views

I have an application that has to run on multiple languages. The user can change the language on the fly at runtime. I really need a way to update the text in the group by header without reloading the entire gridview.

I have successfully set LocalizationManager.Manager to a new custom manager as below. The downside is that I have to reconstruct the gridview in code.

LocalizationManager.Manager = new TelerikGridViewCustomLocalizationManager();

...

class TelerikGridViewCustomLocalizationManager : LocalizationManager

{

public override string GetStringOverride(string key)

{

return MyLocalization.GetResource(key);

}

Is there any way to call an update or refresh on the gridview instead of creating a new one in code?

Thank you for the help.

Scott

GridView

answered on 22 Dec 2011

1 answer

182 views

Format Date Picker (MM-dd-yy)

Hi
Please help me How to display date of telerik RadDatePicker date in the format : 'MM-dd-yy' (instead of the default format) inside a data bound column in ItemsControl.

Thanks
Kripa

DatePicker

answered on 22 Dec 2011

2 answers

59 views

Expanded RadMenu flickers in Windows XP

The same behavior we can see when we expand Rad Menu.

May be you also have solution for this problem.

Please, help us with this problem.

Window

answered on 22 Dec 2011

3 answers

113 views

Redundant count display for CountFunction

Hi, I'm dealing with a format issue in a CountFunction. Basically, we want to display the count of the rows as a result of a grouping. I do this in the Grouping and Grouped event as shown below:

private void gridView_Grouping(object sender, GridViewGroupingEventArgs e)

{

var descriptor = e.GroupDescriptor as ColumnGroupDescriptor;

if (descriptor != null)

{

var functions = descriptor.Column.AggregateFunctions;

if (functions.Count == 0)

{

functions.Add(new CountFunction());

}

private void gridView_Grouped(object sender, GridViewGroupedEventArgs e)

{

if (e.Action == GroupingEventAction.Remove)

{

((ColumnGroupDescriptor)(e.GroupDescriptor)).Column.AggregateFunctions.Clear();

}

I'm sorry if the format is somewhat whacked. The result of the code is something like this, (in the group header)

Column A 5 5 5
       Column B 2   2   2
             Column C 3   3   3

When the desired format should be

Column A 5
     Column B 2
           Column C 3

What exactly is my code doing wrong? Is this by design?

Thanks,
Gio

GridView

answered on 21 Dec 2011

1 answer

80 views

Clicking Stacked Map Items

I have a RadMap that has items added to an information layer. Sometimes these items overlap or they are in the exact same position making it impossible to click the item underneath. Is there support for finding all the items underneath a mouse click?

Map

answered on 21 Dec 2011

6 answers

243 views

SaveLayout when isHidden is binding

Hello,

I tried to use Savelayout/loadlayout to keep docking's layout, when in my wpf application i change "environment".
In my application I have different xaml page with each one contains a docking. And i load one or another with command in a ribbon.
Well, when an "environment" is unloaded, i'd like to keep the layout in order to redisplay it in the next control loading.

One of my environment is structured like this :

<UserControl x:Class="SphinxV6.Data.MC_Table"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:win="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"

xmlns:v6="clr-namespace:SphinxV6" xmlns:v6Table="clr-namespace:SphinxV6.Data.Table"

xmlns:v6Properties="clr-namespace:SphinxV6.Properties"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:telerikNavigation="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"

xmlns:v6Ribbon="clr-namespace:SphinxV6.Ribbon" xmlns:toolselements="clr-namespace:SphinxV6.ToolsElements" xmlns:tabletoolselements="clr-namespace:SphinxV6.Data.Table.ToolsElements" Unloaded="UserControl_Unloaded"

DataContextChanged="UserControl_DataContextChanged" Loaded="UserControl_Loaded">

<Grid x:Name="root" DataContext="{Binding}" >

<Grid.RowDefinitions>

<RowDefinition Height="Auto" />

<RowDefinition Height="*" />

</Grid.RowDefinitions>

<telerik:RadDocking x:Name="xDocking" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" HasDocumentHost="true" Unloaded="RadDocking_Unloaded"

v6:RadDockingExtensions.SaveFloatingPane="True"

telerik:RadDocking.SerializationTag="xDocking" >

<telerik:RadDocking.CompassStyle>

<Style TargetType="{x:Type telerik:Compass}">

<Setter Property="IsCenterIndicatorVisible" Value="True"/>

</Style>

</telerik:RadDocking.CompassStyle>

<telerik:RadDocking.DocumentHost>

<win:WindowsFormsHost Name="windowsFormsHost1" />

</telerik:RadDocking.DocumentHost>

<telerik:RadSplitContainer InitialPosition="DockedLeft" Orientation="Vertical" Width="250" telerik:RadDocking.SerializationTag="DockedLeft">

<telerik:RadPaneGroup telerik:RadDocking.SerializationTag="gVars">

<telerik:RadPane DataContext="{Binding DataContext.TE_Variables, ElementName=root}" Header="{Binding Title}" CanDockInDocumentHost="False" CanUserClose="False" ContextMenuTemplate="{x:Null}"

telerik:RadDocking.SerializationTag="pVars">

<tabletoolselements:TE_VariablesControl />

</telerik:RadPane>

</telerik:RadPaneGroup>

<telerik:RadPaneGroup telerik:ProportionalStackPanel.RelativeSize="200,35" telerik:RadDocking.SerializationTag="gSample">

<telerik:RadPane DataContext="{Binding DataContext.TE_Samples, ElementName=root}" Header="{Binding Title}" IsHidden=

"{Binding DataContext.IsDockSampleVisible, ElementName=root, Mode=TwoWay, Converter={StaticResource convInverseBoolean}}"

CanDockInDocumentHost="False" ContextMenuTemplate="{x:Null}"

telerik:RadDocking.SerializationTag="pSample">

<toolselements:TE_SamplesControl />

</telerik:RadPane>

</telerik:RadPaneGroup>

<telerik:RadPaneGroup telerik:ProportionalStackPanel.RelativeSize="200,15" telerik:RadDocking.SerializationTag="gLang">

<telerik:RadPane DataContext="{Binding DataContext, ElementName=root}" Header="{x:Static v6Properties:Resources.languages}" CanDockInDocumentHost="False" CanUserClose="True" IsHidden="{Binding IsDockLangVisible, Mode=TwoWay, Converter={StaticResource convInverseBoolean}}" ContextMenuTemplate="{x:Null}"

telerik:RadDocking.SerializationTag="pLang">

<StackPanel Margin="3" Orientation="Horizontal">

<v6:Ctrl_LangSelector ></v6:Ctrl_LangSelector>

</StackPanel>

</telerik:RadPane>

</telerik:RadPaneGroup>

</telerik:RadSplitContainer>

</telerik:RadDocking>

</Grid>

</UserControl>

I make "pSample" pane floattable, and change environment, here's the layout saving (which seems to be ok, as far as i understand what saving should make):

<?xml version="1.0" encoding="utf-8"?><RadDocking SerializationTag="xDocking"><SplitContainers><RadSplitContainer SerializationTag="DockedLeft" Dock="DockedLeft" Width="250" Orientation="Vertical"><Items><RadPaneGroup SerializationTag="gVars" SelectedIndex="0"><Items><RadPane SerializationTag="pVars" IsDockable="True" Title="Variables" Header="Variables" CanUserClose="False" CanDockInDocumentHost="False" /></Items></RadPaneGroup><RadPaneGroup SerializationTag="gSample" RelativeWidth="200" RelativeHeight="35" SelectedIndex="-1"><Items /></RadPaneGroup><RadPaneGroup SerializationTag="gLang" RelativeWidth="200" RelativeHeight="15" SelectedIndex="-1"><Items><RadPane SerializationTag="pLang" IsHidden="True" IsDockable="True" Title="Langues" Header="Langues" CanUserClose="True" CanDockInDocumentHost="False" /></Items></RadPaneGroup></Items></RadSplitContainer><RadSplitContainer InitialPosition="FloatingDockable" FloatingWidth="220" FloatingHeight="300" FloatingX="628" FloatingY="555" IsInOpenWindow="True" RelativeWidth="200" RelativeHeight="35" IsAutoGenerated="True"><Items><RadPaneGroup RelativeWidth="200" RelativeHeight="35" IsAutoGenerated="True" SelectedIndex="0"><Items><RadPane SerializationTag="pSample" IsHidden="False" IsDockable="True" Title="Strates" Header="Strates" CanDockInDocumentHost="False" /></Items></RadPaneGroup></Items></RadSplitContainer></SplitContainers></RadDocking>

Now, I reload my environment, the layout is well reload (my psample still flotting at the right place).
I close the pSample pane (the binding boolean is well modified).
the saved layout seems not good, "psample" appears twice ! :

<?xml version="1.0" encoding="utf-8"?><RadDocking SerializationTag="xDocking"><SplitContainers><RadSplitContainer SerializationTag="DockedLeft" Dock="DockedLeft" Width="250" Orientation="Vertical"><Items><RadPaneGroup SerializationTag="gVars" SelectedIndex="0"><Items><RadPane SerializationTag="pVars" IsDockable="True" Title="Variables" Header="Variables" CanUserClose="False" CanDockInDocumentHost="False" /></Items></RadPaneGroup><RadPaneGroup SerializationTag="gSample" RelativeWidth="200" RelativeHeight="35" SelectedIndex="-1"><Items /></RadPaneGroup><RadPaneGroup SerializationTag="gLang" RelativeWidth="200" RelativeHeight="15" SelectedIndex="-1"><Items><RadPane SerializationTag="pLang" IsHidden="True" IsDockable="True" Title="Langues" Header="Langues" CanUserClose="True" CanDockInDocumentHost="False" /></Items></RadPaneGroup></Items></RadSplitContainer>

<RadSplitContainer InitialPosition="FloatingDockable" FloatingWidth="220" FloatingHeight="300" FloatingX="649" FloatingY="514" IsInOpenWindow="False" RelativeWidth="200" RelativeHeight="35" IsAutoGenerated="True"><Items><RadPaneGroup RelativeWidth="200" RelativeHeight="35" IsAutoGenerated="True" SelectedIndex="-1"><Items><RadPane SerializationTag="pSample" IsHidden="True" IsDockable="True" Title="Strates" Header="Strates" CanDockInDocumentHost="False" /></Items></RadPaneGroup></Items></RadSplitContainer>

<RadSplitContainer InitialPosition="FloatingDockable" FloatingWidth="220" FloatingHeight="300" FloatingX="649" FloatingY="514" IsInOpenWindow="False" RelativeWidth="200" RelativeHeight="35" IsAutoGenerated="True"><Items><RadPaneGroup RelativeWidth="200" RelativeHeight="35" IsAutoGenerated="True" SelectedIndex="-1"><Items><RadPane SerializationTag="pSample" IsHidden="True" IsDockable="True" Title="Strates" Header="Strates" CanDockInDocumentHost="False" /></Items></RadPaneGroup></Items></RadSplitContainer></SplitContainers></RadDocking>

What's wrong ? And an other problem, is that hidden floatting panes appear on the next environment...
The workaround (you've preconise on other forum) is to use "removefromparent" function, but,
1. when i use the tip on "close pane event", then the next saving layout xml doesn't contain the "pSample" pane. (and i loose it last position)
or 2. if i remove after saving layout, i have further problem to re-display the pane (i should click several time on my check box) I obtain the following error :

System.Windows.Data Error: 8 : Cannot save value from target back to source. BindingExpression:Path=IsDockSampleVisible; DataItem=

'TableEnvironment' (HashCode=18777961); target element is 'CheckBox' (Name='cbSamples'); target property is 'IsChecked' (type 'Nullable`1') TargetInvocationException:'System.Reflection.TargetInvocationException: Une exception a été levée par la cible d'un appel. ---> System.Reflection.TargetInvocationException: Une exception a été levée par la cible d'un appel. ---> System.InvalidOperationException: L'élément possède déjà un parent logique. Il doit être détaché de l'ancien parent avant d'être attaché au nouveau.

à MS.Internal.Controls.InnerItemCollectionView.AssertPristineModelChild(Object item)

à MS.Internal.Controls.InnerItemCollectionView.Insert(Int32 index, Object item)

à System.Windows.Controls.ItemCollection.Insert(Int32 insertIndex, Object insertItem)

à Telerik.Windows.Controls.RadPaneGroup.ShowSinglePane(RadPane pane)

à Telerik.Windows.Controls.RadPaneGroup.ShowPane(RadPane pane)

à Telerik.Windows.Controls.RadDocking.OnPaneShow(RadPane pane)

à Telerik.Windows.Controls.RadDocking.OnRadPaneShow(Object sender, StateChangeCommandEventArgs args)

--- Fin de la trace de la pile d'exception interne ---

à System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

à System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

à System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

à System.Delegate.DynamicInvokeImpl(Object[] args)

à System.Windows.RoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

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

à System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

à System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)

à Telerik.Windows.Controls.RadPane.OnShow(StateChangeCommandEventArgs args)

à Telerik.Windows.Controls.RadPane.Show()

à Telerik.Windows.Controls.RadPane.OnIsHiddenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

à System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

à System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

à System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)

à System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType)

à System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp)

à System.Windows.Data.BindingExpression.Invalidate(Boolean isASubPropertyChange)

à System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)

à System.Windows.Data.BindingExpression.ScheduleTransfer(Boolean isASubPropertyChange)

à MS.Internal.Data.ClrBindingWorker.NewValueAvailable(Boolean dependencySourcesChanged, Boolean initialValue, Boolean isASubPropertyChange)

à MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)

à MS.Internal.Data.ClrBindingWorker.OnSourcePropertyChanged(Object o, String propName)

à MS.Internal.Data.PropertyPathWorker.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e)

à System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)

à System.ComponentModel.PropertyChangedEventManager.OnPropertyChanged(Object sender, PropertyChangedEventArgs args)

à SphinxV6.EnvironmentBase.RaisePropertyChangedEvent(String sPropertyName) dans C:\dvlp\Project\WPF4\SphinxV6\_Common\Bases\EnvironmentBase.cs:ligne 1830

à SphinxV6.EnvironmentBase.set_IsDockSampleVisible(Boolean value) dans C:\dvlp\Project\WPF4\SphinxV6\_Common\Bases\EnvironmentBase.cs:ligne 73

--- Fin de la trace de la pile d'exception interne ---

à System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

à System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

à System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

à System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

à System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)

à System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index)

à MS.Internal.Data.PropertyPathWorker.SetValue(Object item, Object value)

à MS.Internal.Data.ClrBindingWorker.UpdateValue(Object value)

à System.Windows.Data.BindingExpression.UpdateSource(Object value)'

Well, all seems to behave as expected until i hide panes.
(in another control, i hide a pane which is in a radgroup (non flotting), but in the saved xml, the ishidden attribute stays at "false"., then when i reload the control, the pane is shown.)

Thanks for your future explanation.

Aurore

i use wpf, 2011.3.1116.35 version of telerik dll

Docking

answered on 21 Dec 2011

1 answer

83 views

Design error..

We Update Wpf Rad Controls Trail version to Licensed version Application was closing automatically when xaml code opens......
please send solution for it

Thanking You

Installer and Visual Studio Extensions

answered on 21 Dec 2011

11 answers

423 views

Dynamically add floating panel

How to add a floating panel from code behind.
Also how to add other controls to this panel like image?

Docking

answered on 21 Dec 2011

2 answers

183 views

Toolwindow "borders" on Windows XP

Hello!

Our new issue is based on previous one. This problem is also observed on Windowx XP only. The idea is to create floating toolwindow at the center of the screen dynamically. At the moment of toolwindow is created and its position is changed so we can see two "borders" of the toolwindow as it shown at the 1st attached screen shot. We've found partial workaround that hides the second "border" (by decreasing to zero size of the window after creating and increasing it back after changing position), but the 1st border still remains.

I've created sample project, that demonstrates this issue.

Please, help us to solve this visual issue.

Window

answered on 21 Dec 2011

4 answers

690 views

ArgumentNullException - Value cannot be null. Parameter name: element

Since updating to version 2011.3.1205.40 the RadPanelBar control generates an exception when you click on one of the headers.
Even using the simple code below (C# Net 4.0 WPF), or more fully padded out (right through to a complex piece of production code).

When you run the code below and click on "Item 2" header an exception is generated "Value cannot be null. Parameter name: element"

The stack trace is:
   at Telerik.Windows.Controls.ChildrenOfTypeExtensions.<GetChildrenRecursive>d__3.MoveNext() in c:\TB\117\WPF_Scrum\Current_HotFix\Sources\Development\Core\Controls\Extensions\ChildrenOfTypeExtensions.cs:line 67
   at System.Linq.Enumerable.<OfTypeIterator>d__aa`1.MoveNext()
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source)
   at Telerik.Windows.Controls.RadTreeViewItem.GetFirstFocusableElement() in c:\TB\117\WPF_Scrum\Current_HotFix\Sources\Development\Controls\Navigation\TreeView\RadTreeViewItem.cs:line 1907
   at Telerik.Windows.Controls.RadTreeViewItem.OnGotFocus(RoutedEventArgs e) in c:\TB\117\WPF_Scrum\Current_HotFix\Sources\Development\Controls\Navigation\TreeView\RadTreeViewItem.Events.cs:line 757
   at System.Windows.UIElement.IsFocused_Changed(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(DependencyPropertyKey key, Object value)
   at System.Windows.Input.FocusManager.OnFocusedElementChanged(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.Input.FocusManager.SetFocusedElement(DependencyObject element, IInputElement value)
   at System.Windows.Input.KeyboardNavigation.UpdateFocusedElement(DependencyObject focusTarget)
   at System.Windows.FrameworkElement.OnGotKeyboardFocus(Object sender, KeyboardFocusChangedEventArgs e)
   at System.Windows.Input.KeyboardFocusChangedEventArgs.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.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)
   at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)
   at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)
   at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)
   at System.Windows.UIElement.Focus()
   at Telerik.Windows.Controls.RadTreeViewItem.OnHeaderMouseLeftButtonDown(Object sender, MouseButtonEventArgs e) in c:\TB\117\WPF_Scrum\Current_HotFix\Sources\Development\Controls\Navigation\TreeView\RadTreeViewItem.Events.cs:line 401
   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 RadControlsWpfApp1.App.Main() in Z:\temp\bb\RadControlsWpfApp1\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()

<Window x:Class="RadControlsWpfApp1.MainWindow"

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"

Title="MainWindow" Height="550" Width="800">

<Grid>

<telerik:RadPanelBar Name="radPanelBar1">

<telerik:RadPanelBarItem Header="Item 1" />

<telerik:RadPanelBarItem Header="Item 2" />

</telerik:RadPanelBar>

</Grid>

</Window>