Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!bloom-beacon!athena.mit.edu!joe
From: joe@athena.mit.edu (Joseph C Wang)
Newsgroups: comp.windows.x
Subject: Reparenting Widgets
Message-ID: <12359@bloom-beacon.MIT.EDU>
Date: 1 Jul 89 18:33:58 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: joe@athena.mit.edu (Joseph C Wang)
Organization: Massachusetts Institute of Technology
Lines: 41

I'm helping to develop an application that requires widgets to be reparented.

Is there a better way than to do it with the following code?  Is anyone
thinking about adding an XtReparentWidget call in the next release of
X toolkit?

Longish code follows.

-----------

void XtReparentWidget(widget, new_parent, x, y)
     Widget widget, new_parent;
     Position x, y;
{
if (!XtIsComposite(new_parent)) return;

if (XtParent(widget) == new_parent) return;

XtUnmanageChild(widget);

(*( ((CompositeWidgetClass)
     XtClass(XtParent(widget)))->composite_class.delete_child)) (widget);

widget->core.x = x;
widget->core.y = y;
widget->core.parent = new_parent;

if (XtWindow(new_parent) && XtWindow(widget))
     XReparentWindow(XtDisplay(widget), XtWindow(widget), XtWindow(new_parent),
                (int) x, (int) y);

(*( ((CompositeWidgetClass)
     XtClass(new_parent))->composite_class.insert_child)) (widget);

XtManageChild(widget);
}

--------------------------------
Joseph Wang (joe@athena.mit.edu) 
450 Memorial Drive C-111
Cambridge, MA 02139