Approved
Last Updated: 21 Aug 2019 10:38 by ADMIN

TabControl's TabItems aren't properly updated on attempt to change the theme palette variation runtime until any of the items is selected. Check the following video - https://www.screencast.com/t/jMj0EZqFfy.

There are several possible workarounds which include:

  • Clearing all merged resource dictionaries and re-merging them
  • Increasing and decreasing the height of the MainWindow by 1 after loading the chosen palette to force the refresh
Approved
Last Updated: 30 May 2019 08:27 by ADMIN

When the window of an application that has a TabControl with Left/Right TabStripPlacement is resized, the measure of the TabStrip is incorrect and the ScrollButtons are in Disabled state. All Tabs should be visible when the window is in its normal state and should be scrollable.
 
========================
Possible workaround:
Inherit RadTabControl and override

  protected override void OnScrollButtonsVisibilityChanged()
        {
            if (this.ScrollViewer != null)
            {
                RadDockPanel parentDock = this.ScrollViewer.Parent as RadDockPanel;
                if (parentDock != null)
                {
                    // Dispatcher is because Measure should be called outside other Measure phase.
                    this.Dispatcher.BeginInvoke(new Action(() =>
                    {
                        parentDock.InvalidateMeasure();
                    }));
                }
            }
        }
 
 
Approved
Last Updated: 30 Oct 2018 09:40 by Viktoria
RadTabControl is currently designed to support scrolling of RadTabItems only when any of them is currently focused. An ability to scroll RadTabItems without explicitly focusing them should be provided.
Approved
Last Updated: 21 Jun 2018 06:30 by ADMIN
ADMIN
Created by: Martin Ivanov
Comments: 0
Category: TabControl
Type: Feature Request
1
RadTabControlBase expose a protected method called OnPreviewSelectionChanged that should raise the event PreviewSelectionChanged event. This means that you should be able to override it and implement additional logic if necessary.

However, the method is never used in the code and therefore it is not fired when the PreviewSelectionChanged event raises. 

Use the method to raise the event.
Approved
Last Updated: 20 Apr 2018 12:35 by Vladimir
ADMIN
Created by: Vladimir Stoyanov
Comments: 0
Category: TabControl
Type: Bug Report
1

			
Approved
Last Updated: 20 Mar 2018 16:03 by ADMIN
ADMIN
Created by: Petar Mladenov
Comments: 2
Category: TabControl
Type: Bug Report
2
When you select the RadTabItems via Keyboard or Mouse, Narrator or other Accessibility tools like NVDA do no read the selected tab.

This is a bug in the RadTabControlAutomaitonPeer / RadTabItemAutomationPeer's code.

Usually screen readers read "Selected Tab One", "Selected Tab 2". This is how MS TabControl is read actually.

Approved
Last Updated: 08 Feb 2018 11:50 by ADMIN
Approved
Last Updated: 17 Mar 2017 14:36 by ADMIN
Approved
Last Updated: 17 Feb 2017 14:40 by ADMIN
By default, when selecting through the tab items, the first focusable element within each RadTabItem will gain focus. This is the behavior of the standard  RadTabItem as well. Provide an option to disable this default selection through a boolean property.
Approved
Last Updated: 04 Jan 2017 14:34 by Anthony
Created by: Anthony
Comments: 1
Category: TabControl
Type: Bug Report
1
In version 2016.2.613.45 of the Office2013 Theme, there is a problem in the control template for the RadTabControl. The ContentBorder element properly gets it's BorderThickness from the TemplatedParent, but the PlacementStates VisualStates override it with hard-coded Thickness (0,1,1,1 in the case of the "Left" Visual State) in their storyboards rather than doing an appropriate transform of the Thickness. This makes it impossible to override the BorderThickness for the control in any state other than the default layout without copying and replacing the entire control template. This appears to be a change in behavior since the (Februray 2016?) release, but I cannot be sure as the old theme files were uninstalled during the upgrade and the telerik.windows.controls.navigation.baml file is not properly decompiled in JustDecompile.
Approved
Last Updated: 03 Jan 2017 21:24 by ADMIN
Workaround: Set HorizontalScrollBarVisibility property to Visible in order to show the scrollbar: 
<telerik:RadTabControl ScrollViewer.HorizontalScrollBarVisibility="Visible" .../>

or use Loaded event of TabControl and change the Height in order to trigger SizeChanged:
private void xTab_Loaded(object sender, RoutedEventArgs e)
{
    this.Height++;
    this.Height--;
}
Approved
Last Updated: 03 Jan 2017 21:20 by ADMIN
The SelectedTabContent is not added when the control is loaded in memory and a we try to create a ImageSource out of the UserControl hosting the TabControl
Approved
Last Updated: 03 Jan 2017 21:19 by ADMIN
If you define two UserControls in a project and you add two RadTabControls - one RadTabControl per UserControl, then in design-time you can only change the selection of one of the tab components.
Approved
Last Updated: 03 Jan 2017 21:09 by ADMIN
ADMIN
Created by: Pavel R. Pavlov
Comments: 0
Category: TabControl
Type: Bug Report
3
When you have implicit DataTemplates applied to items the binding expression is lost on selection changed.
Approved
Last Updated: 03 Jan 2017 21:08 by ADMIN
Selecting tabs with same names from the drop down menu always selects the first one.
Approved
Last Updated: 03 Jan 2017 21:06 by ADMIN
Change the TabItems layout when the TabControl OverflowMode="Wrap" with TabStripPlacement="Bottom" :
1. Let's say the wrap results in 3 lines. What we would expect is line 1 and 2 to be filling the entire width and line 3 to be partially filled. What we experience is line 1 partially filled and lines 2 and 3 filling the entire width 
2. When clicking on an item the lines swap around. The partially filled line can end up on top, in the middle or on the bottom. Clicking on items that cause tab rows to move up should re-flow the wrap.
3. Ideally - to look good - the logic should stretch the 'complete' rows to the entire width - i.e. it should adjust tab sizes to fill the entire width available on 'full' rows.
Approved
Last Updated: 03 Jan 2017 21:05 by ADMIN
In the VS2010 designer the selected tab is the last one even if the SelectedIndex proeprty of the TabControl is set to 0. The issue can be reprodiced in a scenario where the RadTabControl is defined in a RadWindow control.
Approved
Last Updated: 03 Jan 2017 21:05 by ADMIN
Using Xaml declared tab control with identical tab item headers will result in selecting the first occurance of selected text from the drop down content.
Add support for distinguishing different items in the drop down content (use DropDownDisplayMode=Visible) during selection and match to the corresponding TabItem.
Approved
Last Updated: 03 Jan 2017 21:04 by ADMIN
Click event of a Button in the HeaderTemplate is not fired properly when another button outside the tab has IsDefault property set to true
1 2 3