Unplanned
Last Updated: 20 Feb 2024 11:58 by B K
TabControl: The tab items and their content are not disposed correctly due to the RadTabItemAutoamtionPeer.
Completed
Last Updated: 25 May 2023 13:34 by ADMIN
Completed
Last Updated: 19 Jan 2023 14:50 by ADMIN
Created by: Jorge
Comments: 1
Category: TabControl
Type: Feature Request
2

Currently, when scrolling tabs in a TabControl using the mouse wheel, the direction of the scroll is the opposite as tab controls of many other applications, for example all web browsers scroll tabs in the opposite direction as the Telerik RadTabControl.

This behaviour may cause frustration in the end user and damages the user experience. I think it's necessary to expose a way to allow inverting the RadTabControl mouse wheel scroll direction.

Completed
Last Updated: 16 Nov 2022 14:27 by ADMIN
Release LIB 2022.3.1121 (21 Nov 2022)
When there are tabs present which have their Visibility property set to Collapsed and the ScrollMode of the control is Item, scrolling the items via the arrow buttons skips items unexpectedly.
Completed
Last Updated: 13 May 2022 18:18 by ADMIN
Release LIB 2022.2.516 (16 May 2022)
The RadTabItem elements are not correctly displayed with long values set to the Header property when the TabOrientation="Vertical" and the used theme is Office2019.
Declined
Last Updated: 11 Aug 2021 15:47 by Petar
The DropDownContentTemplate is not applied to items in the dropdown menu that are dynamically added. 
Completed
Last Updated: 22 Mar 2021 07:13 by ADMIN
Release LIB 2021.1.322
This happens if you use the DropDownOpened event of RadTabControl in order to reorder the DropDownItemsSource of the event arguments. In this case, the synchronization of the selection between the drop down and the tab items is broken.

To work this around, you can disable the default overflow button and implement a custom one in the AdditionalContent of RadTabControl. Check the attached project for a sample implementation.
Completed
Last Updated: 27 Nov 2020 14:34 by ADMIN
Release LIB 2020.3.1130 (11/30/2020)
The Align property is not respected in the following themes: Windows8Touch, Office2019
Unplanned
Last Updated: 21 Sep 2020 08:25 by ADMIN
Pressing the Home and End keys selects the first/last items even if they are collapsed/hidden.
Unplanned
Last Updated: 30 Jul 2020 08:42 by ADMIN
The scroll buttons are visible when the visible area is enough to display all tabs and the TabStripPlacement is set to Left/Right.
Won't Fix
Last Updated: 12 May 2020 08:22 by Hans
Tab selection does not work in the VS designer when switching between different views.
Won't Fix
Last Updated: 06 Mar 2020 10:49 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.
Unplanned
Last Updated: 03 Dec 2019 14:08 by ADMIN
Introduce "Add new tab" button as in the RadTabbedWindow control which creates a new tab upon click.
Completed
Last Updated: 25 Nov 2019 12:03 by ADMIN
Release LIB 2019.3.1125

Drag and drop from Visual Studio Toolbox to the designer area doesn't allow you to drop the corresponding control inside the content of the selected tab item. 

To work this around, add a Grid panel with transparent background inside the RadTabItem's in XAML. You can do this also  through the toolbox.

 <telerik:RadTabItem x:Name="RadTabItem1" Header="Tab item 1">
	<Grid Background="Transparent" />
 </telerik:RadTabItem>

Completed
Last Updated: 28 Oct 2019 11:04 by ADMIN
Release LIB 2019.3.1028
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.

Completed
Last Updated: 14 Oct 2019 11:05 by ADMIN
Release LIB 2019.3.1014

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
Completed
Last Updated: 14 Oct 2019 10:44 by ADMIN
Release LIB 2019.3.1014
ADMIN
Created by: Dinko | Tech Support Engineer
Comments: 0
Category: TabControl
Type: Bug Report
1

			
Completed
Last Updated: 11 Jun 2019 10:03 by ADMIN
Release R2 2019 SP1
Completed
Last Updated: 06 Jun 2019 06:50 by ADMIN
Release LIB 2019.2.610 (06/10/2019)
In R2 2019 there is a regression bug in RadTabControl.
Clicking with mouse middle button over a tab removes it from the Items collection.
====
Workaround: In R2 2019 or for particular items, user can handle PreviewMouseDown event of the RadTabItem and if the pressed button is middle - handle the event. 
private void RadTabItem_PreviewMouseDown(object sender, MouseButtonEventArgs e)
       {
           if (e.ChangedButton == MouseButton.Middle)
           {
               e.Handled = true;
           }
       }
Unplanned
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();
                    }));
                }
            }
        }
 
 
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