How to customize the close button in TabbedGroupMDIManager

3 Sep 2020 / 2 minutes to read

This can be achieved by deriving TabbedGroupMDIManager class and overriding GetCloseButtonBounds method as follows.

c#

public class CustomTabbedMDI : TabbedGroupedMDIManager

{

    public CustomTabbedMDI() { }



    protected override MDITabPanel CreateMDITabPanel()

    {

        return new CustomMDITabPanel(this);

    }

}

public class CustomMDITabPanel : MDITabPanel

{

    public CustomMDITabPanel(TabbedMDIManager tabbedMDIManager)

        : base(tabbedMDIManager)

    { }

    protected override Rectangle GetCloseButtonBounds()

    {

        Rectangle rect = base.GetCloseButtonBounds();

        rect.Y = 4; rect.Width = 15; rect.Height = 15;

        return rect;

    }

}

vb

Public Class CustomTabbedMDI : Inherits TabbedGroupedMDIManager

    Public Sub New()

    End Sub



    Protected Overrides Function CreateMDITabPanel() As MDITabPanel

        Return New CustomMDITabPanel(Me)

    End Function

End Class

Public Class CustomMDITabPanel : Inherits MDITabPanel

    Public Sub New(ByVal tabbedMDIManager As TabbedMDIManager)

        MyBase.New(tabbedMDIManager)

    End Sub

    Protected Overrides Function GetCloseButtonBounds() As Rectangle

        Dim rect As Rectangle = MyBase.GetCloseButtonBounds()

        rect.Y = 4

        rect.Width = 15

        rect.Height = 15

        Return rect

    End Function

End Class