Pressing Alt to activate the KeyTips and then Alt+Tab leads to NullReferenceException (especially on slower machine )


Available in LIB version: 2017.2.605

The title bar has a fixed White Background set. The workaround is to set the TitleBackground of RadRibbonView to Black.

The feature should be similar to the TabStripAdditionalContent(https://docs.telerik.com/devtools/wpf/controls/radribbonview/how-to/howto-additional-content-near-help-icon)  of RadRibbonView and RadTabControl. It would be useful to include additional information and functionality like in the MS Office tools. For example the Outlook app (check the attached image).

As a workaround, you can set the FocusVisualStyle of the DropDownPopupContent element in the template of the RadRibbonDropDownButton  to null or add an implicit style for ContentControl setting the FocusVisualStyle to null.

The issue is reproducible in Fluent theme as well.

The current workaround is to handle the RadTabItems' PreviewMouseLeftButtonDown event like so:

         public MainWindow()
        {
            InitializeComponent();
            EventManager.RegisterClassHandler(typeof(RadRibbonTab), PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(OnClick), true);
        }

        private void OnClick(object sender, MouseButtonEventArgs e)
        {
            var tab = sender as RadRibbonTab;
            var ribbon = tab.ParentOfType<RadRibbonView>();
            if (ribbon.IsApplicationMenuOpen)
            {
                ribbon.SelectedItem = tab;
            }
        }

The attached project demonstrates a possible approach for handling this - by editing RadRibbonWindow's control template and specifying a converter for the PART_Icon Image's Width and Height bindings. The converter in turn takes into account the DPI of the current monitor.

In the Crystal theme, the TitleBarBackground property is set through a style trigger to a static value. This leads to an unexpected result in the dark variation of the theme. 

As a workaround you can use the following style:

  <Style TargetType="telerik:RadRibbonView" BasedOn="{StaticResource RadRibbonViewStyle}">
            <Style.Triggers>
                <Trigger Property="IsHostedInRibbonWindow" Value="True">
                    <Setter Property="TitleBarBackground" Value="{telerik:CrystalResource ResourceKey=AlternativeBrush}"/>
                </Trigger>
            </Style.Triggers>
   </Style>

 

 

 

When the ContentHeight is set in Xaml or before the control is loaded it is not respected. 

In the application menu, we have placed a RadRibbonSplitButton. When the application menu is open, and we press Tab and Space key, the application menu is closed and the UI unresponsive until the mouse leaves the control.

To reproduce this:

• Set the RadRibbonButton LargeImage/SmallImage to a property that is larger than 16 (small image) or 32 (large image).
• Set IsAutoSize to False. This will stretch the image on all available space for the button.
• Set IsAutoSize to True. This should uniform stretch the picture so that it fills the auto size of 16 or 32 pixels. However, the image doesn't stretch, instead its Stretch is set to None, which expand the image to its original size. This leads to the clipping.

To work this around, avoid setting the IsAutoSize property. Or use smaller pictures - 16 or 32 pixels.

Black border appears around the window when SizeToContent is set to WidthAndHeight

When we have specified RibbonGallery, and we resize the RibbonView fast enough, the RibbonGallery is collapsed even if there is enough space to visualize.

Navigating with the Tab key does not jump between different RadRibbonGroups even if they have their KeyboardNavigation.TabNavigation property set.