Approved
Last Updated: 13 Nov 2019 16:35 by ADMIN

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>

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: 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: 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: 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 21:08 by ADMIN
Selecting tabs with same names from the drop down menu always selects the first one.
Approved
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);
}
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 21:20 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 20:58 by ADMIN
When a TabItem has a width (and the TabControl - don't) and if you try to resize the window so that the width of the window is less than the width of the TabItem - the TabItems start jumping
Approved
Last Updated: 03 Jan 2017 20:57 by ADMIN
When a RadDocking is located inside a RadTabControl and the RadPaneGroup contains only one RadPane the content is scrolled(if located inside a ScrollViewer)
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 20:58 by ADMIN
When the RadTabControl AllowDragReorder property is set to True and the control contains multiple rows with tabs, the dragging operation cannot be properly executed and completed.
Approved
Last Updated: 03 Jan 2017 21:04 by ADMIN
SelectedItem does not respect the Reset collection changed action.
Approved
Last Updated: 03 Dec 2012 11:28 by ADMIN
ADMIN
Created by: Telerik Admin
Comments: 0
Category: TabControl
Type: Bug Report
5
Pressing "Tab" key does not change the focus when there are several controls in a TabItem.
1 2