Won't Fix
Last Updated: 06 Mar 2020 10:58 by ADMIN
Tab selection does not work in the VS designer when switching between different views.
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: 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: 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;
           }
       }
Completed
Last Updated: 11 Jun 2019 10:03 by ADMIN
Release R2 2019 SP1
Completed
Last Updated: 22 May 2019 11:25 by ADMIN
Release LIB 2019.2.527 (05/27/2019)
A design time error occurs when referencing NoXaml assemblies. 
The error message is the following: "Cannot find resource named 'RadButtonStyle'. Resource names are case sensitive."
Completed
Last Updated: 31 Jan 2019 12:09 by ADMIN
error appears when the control is placed inside a RadTabItem

Scheduled for:
The fix for this issue will be available with LIB (version 2019.1.204) scheduled for publishing on Monday, 4th February 2019.
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();
                    }));
                }
            }
        }
 
 
Unplanned
Last Updated: 11 Oct 2018 05:27 by ADMIN
Unplanned
Last Updated: 20 Apr 2018 12:35 by Vladimir
ADMIN
Created by: Vladimir Stoyanov
Comments: 0
Category: TabControl
Type: Bug Report
1

			
Completed
Last Updated: 14 Oct 2019 10:44 by ADMIN
Release LIB 2019.3.1014
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: 12 Feb 2019 16:05 by ADMIN
When pressing the Alt key, the access key of a given element must be displayed. Inside the Header of a TabItem it is not. The issue is not reproducible with the standard MS TabItem. It seems that it is related to the Foreground binding of the control. There is a workaround as shown below.

<telerik:RadTabControl>
    <telerik:RadTabItem >
        <telerik:RadTabItem.Header>
            
                <AccessText Text="_Tab 1"
                            Foreground="{Binding RelativeSource={RelativeSource AncestorType=telerik:RadTabItem},
                            Path=Foreground}"/>
        </telerik:RadTabItem.Header>
    </telerik:RadTabItem>
</telerik:RadTabControl>
Unplanned
Last Updated: 17 Mar 2017 14:36 by ADMIN
Unplanned
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--;
}
Unplanned
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.
Unplanned
Last Updated: 03 Jan 2017 21:08 by ADMIN
Selecting tabs with same names from the drop down menu always selects the first one.
Unplanned
Last Updated: 03 Jan 2017 20:53 by ADMIN
Workaround:
Use the PreviewMouseLeftButtonUp and PreviewMouseLeftButtonDown events of the DropDownMenuItem. Handle the first event and invoke DropDownMenuItem.MouseLeftButtonUpEvent in the second in order to workaround the MouseLeftButtonUp event fired from the DropDownMenuButton and to call the logic for selecting the tabitem only when the dropdown menuitem is clicked (not just hovered). 

<Style TargetType="telerikTabControl:DropDownMenuItem">		
        <EventSetter Event="PreviewMouseLeftButtonUp" Handler="DropDownMenuItem_PreviewMouseLeftButtonUp" />
        <EventSetter Event="PreviewMouseLeftButtonDown" Handler="DropDownMenuItem_PreviewMouseLeftButtonDown" />
</Style>

private void DropDownMenuItem_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{		
		e.Handled = true;
}

private void DropDownMenuItem_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
	var item = (sender as DropDownMenuItem);
	MouseButtonEventArgs mouseEventArgs = new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left);
	mouseEventArgs.RoutedEvent = DropDownMenuItem.MouseLeftButtonUpEvent;
	item.RaiseEvent(mouseEventArgs);
}
Declined
Last Updated: 09 Sep 2016 08:55 by ADMIN
DECLINED: This issue is not reproducible with R2 SP1 2016 Release.
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