NetNews Usenet Archive 1992 #19/NN_1992_19.iso/spool/comp/windows/x/motif/5835

Internet Message Format | 1992-08-26 | 1.7 KB

Path: sparky!uunet!cis.ohio-state.edu!ucbvax!oceanroutes.ns.ca!deveau
From: [e-mail] ("Terry J. Deveau")
Newsgroups: comp.windows.x.motif
Subject: Re: can't create another form
Message-ID: <[e-mail]>
Date: 26 Aug 92 18:40:04 GMT
References: <[e-mail]>
Sender: [e-mail]
Distribution: inet
Organization: Oceanroutes Canada Inc.
Lines: 38

> I have created one form widget to hold some push button widgets and
> label widgets. In the callback functions of the pushbuttons, I want to
> create another form so that it can hold some other widgets. But creating
> another form lands me in problems:
> I cant attach my widgets to this new form. Also attaching one widget to
> another gives me segmentation fault.
>
> Why can't I create another form and use it the same way as the first
> form. I am sure that the problem can be solved using other kind of
> container widgets but why not form?
>
Don't create the new form in the callback, just manage it there; also
your new form must be a child of an XmDialogShell, this is automatic
if you use XmCreateFormDialog.

Do the following during initialization:

1) XtAddCallback (pushbutton, XmNactivateCallback, yourCallback, NULL)

2) newform = XmCreateFormDialog (pushbutton, ...)

3) other = XmCreateOtherWidget (newform, ...) /* replace this call
             with whatever your "other widget" is */

4) XtManageChild(other)

5) repeat 3 and 4 as many times as necessary.

In "yourCallback" include:

5) XtManageChild(newform)

You can probably figure out the rest.  OSF/Motif Programmer's Guide
will help.

Your segmentation fault is likely an error in pointer usage (C not Motif).

... Terry