c# - XtraTabbedMdiManager Layout (Tile Vertical, Tile Horizontal. Tile Cascade) -

i have ribbon form 3 button.. want change tabbed child form become vertical, horizontal, or cascade... there how ?

if using frmmain 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 change layout when press btnvertical change layout

to make layoutmdi method work, remove xtratabbedmdimanager form or nullify xtratabbedmdimanager.mdiparent property because mdilayout mode not applicable xtratabbedmdimanager's tabs:

void btnvertical_itemclick(object sender, devexpress.xtrabars.itemclickeventargs e) {      xtratabbedmdimanager1.mdiparent = null; // turn off tabs      layoutmdi(mdilayout.tilevertical); } 

as alternative solution, can try documentmanager component it's native mdi view.