XtraTabbedMdiManager Layout (Tile Vertical, Tile Horizontal. Tile Cascade)

Question

I have ribbon form with 3 button.. I want to change the tabbed child form become Vertical, Horizontal, or Cascade... is there how to do it ?

If using frmmain with property

ismdiContainer=true

private void btn1_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
     form1 frm1 = new form1();
     frm1.MdiParent=this;
     frm1.Show();
}

private void btnVertical_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
     LayoutMdi(MdiLayout.TileVertical);
}

private void btnHorizontal_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
     LayoutMdi(MdiLayout.TileHorizontal);
}

private void btnCascade_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
     LayoutMdi(MdiLayout.Cascade);
}

the Question is, How to change the Layout when I press the btnVertical to Change the Layout

Answer 1

To make the LayoutMdi method work, just remove the XtraTabbedMdiManager from your form or nullify the XtraTabbedMdiManager.MdiParent property because the MdiLayout mode is not applicable for XtraTabbedMdiManager's tabs:

void btnVertical_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
     xtraTabbedMdiManager1.MdiParent = null; // turn off tabs
     LayoutMdi(MdiLayout.TileVertical);
}

As an alternative solution, you can try the DocumentManager component with it's Native MDI View.