Problem with FocusManger on radwindow

2 posts, 0 answers
  1. Marcin
    Marcin avatar
    165 posts
    Member since:
    Jan 2011

    Posted 06 Sep 2012 Link to this post

    I'm using rad window as window:

    <telerik:RadWindow ResizeMode="CanResizeWithGrip">
        <AdornerDecorator>
            <Grid FocusManager.FocusedElement="{Binding ElementName=txtName}"> ...
    Having focus manager is causing exception below:

    System.NullReferenceException
    Object reference not set to an instance of an object.
       at Telerik.Windows.Controls.WindowBase.OnGotKeyboardFocus(KeyboardFocusChangedEventArgs e) in c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\Window\WindowBase.cs:line 863
       at System.Windows.UIElement.OnGotKeyboardFocusThunk(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.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.InvalidateProperty(DependencyProperty dp)
       at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
       at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
       at System.Windows.Data.BindingExpression.Activate(Object item)
       at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
       at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
       at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
       at MS.Internal.Data.DataBindEngine.Run(Object arg)
       at MS.Internal.Data.DataBindEngine.OnLayoutUpdated(Object sender, EventArgs e)
       at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
       at System.Windows.ContextLayoutManager.UpdateLayout()
       at System.Windows.UIElement.UpdateLayout()
       at System.Windows.Interop.HwndSource.SetLayoutSize()
       at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
       at MS.Internal.DeferredHwndSource.ProcessQueue(Object sender, EventArgs e)


    It happens only on designer (thankfully) but is a bit anoying. Once I remove focus manager there is no error.
  2. Vladi
    Admin
    Vladi avatar
    744 posts

    Posted 11 Sep 2012 Link to this post

    Hello Marcin,

    We looked into the issue and noticed that it is a bug in the control that indeed shows only in design time. We logged the issue in our Public Issue Tracker System, you can vote for and track its status here.

    Thank you for bringing this to our attention, I updated your Telerik points for the report.



    Kind regards,
    Vladi
    the Telerik team

    Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

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