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From: gjf00@duts.ccc.amdahl.com (Gordon Freedman)
Newsgroups: comp.windows.x.motif
Subject: Re: How do I get window to resize?
Message-ID: <58VF02pl07y301@JUTS.ccc.amdahl.com>
Date: 3 May 91 19:11:19 GMT
References: <33iu02bN07Of01@JUTS.ccc.amdahl.com> <4639@gmdzi.gmd.de>
Sender: netnews@ccc.amdahl.com
Reply-To: gjf00@DUTS.ccc.amdahl.com (Gordon Freedman)
Organization: Amdahl Corporation, Sunnyvale CA
Lines: 30

In article <4639@gmdzi.gmd.de> berlage@gmdzi.gmd.de (Thomas Berlage) writes:
>In article <33iu02bN07Of01@JUTS.ccc.amdahl.com>, gjf00@duts.ccc.amdahl.com (Gordon Freedman) writes:
>> Does anybody know how request or force a window to resize itself to something
>> sensible after changing the layout of some of the widgets in the window?
>Whether resizing is allowed is controlled by all manager widgets in the
>hierarchy. First of all you have to set XmNallowShellResize of the toplevel
>shell to True. Other manager widgets may have similar resources.
>
>Thomas Berlage (berlage@gmdzi.gmd.de), GMD, Germany

First, thanks to Thomas for the answer to my question. Experimenting with 
using XmNallowShellResize, I found that I only needed to specify it for the
top level shell widget (which I created with XtVaAppInitialize). I was able
to do a SetValues after creating the top level shell to set this.

I did not have to set it for any other widgets, and the heierarchy was:

ToplevelShell -> XmMainWindow -> XmFrame -> XmForm -> XmRowColumn(2)
						|
						+------> XmMenuBar -> CascadeButtons

The two XmRowColumns were what I was changing the layout for, I found that
if I didn't unmanage them before I changed their layout, the window got
larger than it needed to, as it was resized after the first layout was
changed, and then resized again after the second layout was changed. Unmanaging
them and then Managing them after changing both layouts caused the toplevel
shell to only resize once, which was what I wanted.
--
Gordon Freedman: gjf00@duts.ccc.amdahl.com
Disclaimer: My opinions! Not my employers!