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How to avoid tab selection in TabbedDockControl when dragging over mouse in unselected TabbedDockControl?

Platform: WinForms |
Control: DockingManager |
Published Date: April 30, 2011 |
Last Revised Date: December 4, 2019

Avoid the tab selection

Unselected TabbedDockControl gets selected when dragging and dropping any element from the TabbedDockControl. This can be avoided using SelectedIndexChanging event of the embedded TabControl of the TabbedDockControl.

C#

private void dockingManager1_NewDockStateEndLoad(object sender, EventArgs e)
{
   Syncfusion.Windows.Forms.Tools.DockHost dhost = this.panel1.Parent as    Syncfusion.Windows.Forms.Tools.DockHost;
   Syncfusion.Windows.Forms.Tools.DockHostController dhc = dhost.InternalController as
Syncfusion.Windows.Forms.Tools.DockHostController;
   if (dhc.ParentController is Syncfusion.Windows.Forms.Tools.DockTabController)
   {
      Syncfusion.Windows.Forms.Tools.DockTabControl docktab = (dhc.ParentController as
Syncfusion.Windows.Forms.Tools.DockTabController).TabControl;
      docktab.SelectedIndexChanging += new Syncfusion.Windows.Forms.Tools.SelectedIndexChangingEventHandler
(docktab_SelectedIndexChanging);
   }
}
void docktab_SelectedIndexChanging(object sender, Syncfusion.Windows.Forms.Tools.SelectedIndexChangingEventArgs args)
{
   if (flag ==false)
   {
      if (args.NewSelectedIndex == 0)
      {
          args.Cancel = true;
      }
   }
}

 

VB

Private Sub dockingManager1_NewDockStateEndLoad(ByVal sender As Object, ByVal e As EventArgs) Handles dockingManager1.NewDockStateEndLoad
    Dim dhost As Syncfusion.Windows.Forms.Tools.DockHost = TryCast(Me.panel1.Parent, Syncfusion.Windows.Forms.Tools.DockHost)
    Dim dhc As Syncfusion.Windows.Forms.Tools.DockHostController = TryCast(dhost.InternalController, Syncfusion.Windows.Forms.Tools.DockHostController)
    If TypeOf dhc.ParentController Is Syncfusion.Windows.Forms.Tools.DockTabController Then
       Dim docktab As Syncfusion.Windows.Forms.Tools.DockTabControl = (TryCast(dhc.ParentController, Syncfusion.Windows.Forms.Tools.DockTabController)).TabControl
AddHandler docktab.SelectedIndexChanging, AddressOf docktab_SelectedIndexChanging
   End If
End Sub
Private Sub docktab_SelectedIndexChanging(ByVal sender As Object, ByVal args As Syncfusion.Windows.Forms.Tools.SelectedIndexChangingEventArgs)
   If flag =False Then
      If args.NewSelectedIndex = 0 Then
          args.Cancel = True
      End If
   End If
End Sub

 

 

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