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From: kmeek@cti1.UUCP (Kevin Meek)
Newsgroups: comp.windows.x
Subject: displaying on multiple servers
Message-ID: <502@cti1.UUCP>
Date: 6 Jun 91 21:24:12 GMT
Organization: Comprehensive Technologies Int., Arlington VA
Lines: 89

I am learning X programming and am trying to figure out 
how to have an application open a widget on two different
display servers.   

I only have the basic MIT distribution -- no motif or open look.

I am using an example from the Nutshell sources  that I have been 
hacking on.  I get a bus error/ core dump when I run this.

Any suggestions/ tips / working examples of multi display programs,
would be greatly appreiciated.

BTW:  Is this the proper place to post this type of questions?
      It seemed like the most apropriate to me.

Kevin Meek
kmeek@cti.com

---- source that causes core dump.  -- I am running on an AT&T 3B2/600G 
---- System V 3.2.2 if that helps.

/*
 * xtwodisp.c
 */

/*
 * Include files required for all Toolkit programs
 */
#include <X11/Intrinsic.h>	/* Intrinsics Definitions */
#include <X11/StringDefs.h>	/* Standard Name-String definitions */

#include <X11/Shell.h>		/* Needed for applicationShellWidgetClass */

/*
 * Public include file for widgets we actually use in this file.
 */
#include <X11/Xaw/Label.h>		/* Athena Label Widget */

main(argc, argv)
int argc;
char **argv;
{
	XtAppContext app_con;
	Widget topLevel1, topLevel2, hello, goodbye;
	Display *display1, *display2;

	XtToolkitInitialize();

	app_con = XtCreateApplicationContext();

 	display1 = XtOpenDisplay(app_con, NULL, NULL, "XHello", NULL, 0, &argc, argv); 

	display2 = XtOpenDisplay(app_con, "kmeek.cti:0", NULL, "XGoodbye", NULL, 0, &argc, argv);

 	topLevel1 = XtAppCreateShell(app_con, "XHello", applicationShellWidgetClass, display1, NULL, 0); 

	topLevel2 = XtAppCreateShell(app_con, "XGoodbye", applicationShellWidgetClass, display2, NULL, 0);

	hello = XtCreateManagedWidget(
		"hello",		/* arbitrary widget name */
		labelWidgetClass,	/* widget class from Label.h */
		topLevel1,	/* parent widget*/
		NULL,		/* argument list */
		0		/* arg list size */
		);

	goodbye = XtCreateManagedWidget(
		"goodbye",		/* arbitrary widget name */
		labelWidgetClass,	/* widget class from Label.h */
		topLevel2,	/* parent widget*/
		NULL,		/* argument list */
		0		/* arg list size */
		);
	/*
	 *  Create windows for widgets and map them.
	 */
 	XtRealizeWidget(topLevel1); 
	XtRealizeWidget(topLevel2);

	/*
	 *  Loop for events.
	 */
	XtAppMainLoop(app_con);
}


-- 
Kevin Meek 
kmeek@cti.com