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From: kseethar@hawk.ulowell.edu (Krishnan Seetharaman)
Newsgroups: comp.windows.x.motif
Subject: Re: Need help with Ulowell MotifC++ bindings
Message-ID: <1991May17.194521.949@ulowell.ulowell.edu>
Date: 17 May 91 19:45:21 GMT
References: <15457@arctic.nprdc.navy.mil>
Sender: usenet@ulowell.ulowell.edu (News manager)
Organization: University of Lowell Computer Science, Lowell MA
Lines: 55

In article <15457@arctic.nprdc.navy.mil> apple@nprdc.navy.mil (Jim Apple) writes:
>
>	I need some help with the Ulowell C++ bindings for Motif.
>
>My problem is that I can not pass a object (XMObject) as a argument
>to a function that is in another source file.
>
>	here is a short fragment of what I'm trying to do
>
>----- main.cc
>.
>void CreateMainMenu( XMForm *  );  
>// I've also tried, void CreateMainMenu( XMObject *  );  
>
>void main (unsigned int argc,  char **argv) 
>{
>  XMApplicationShell topLevel ("topLevel", &argc, argv );
>  XMForm mainWindow (&topLevel, "mainWindow" );
>  CreateMainMenu( &mainWindow );
>}
>
>----- menus.cc
>
>void
>CreateMainMenu( XMForm * parent )
>{
>  XMString string ( "test" );
>  XMLabel label ( parent, "label", &string );
>  label.Manage();
>}
>
>The mainWindow is displayed but I get a message "Destroying Widget ..",
>and the  label is never displayed
>
>If I move the three lines from CreateMainMenu to main.cc and replace "parent"
>with "&mainWindow", it works fine.
>
>GDB show main.cc:&mainWindow and Menus.cc:parent to be the same address

Hi

I tried out the above program and the fix seems to be to put declare the
variables in the other file as static. 

Hope this helps ...

Regards
Krishnan


-- 
K. Seetharaman                         | email : kseethar@cs.ulowell.edu
Graphics Research Laboratory,          | Tel   : 508-934-3612
Department of Computer Science         | 
University of Lowell, Lowell, MA 01854 |