Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!husc6!think!ames!elroy!gryphon!cadovax!trwrb!trwspp!spp2!urban
From: urban@spp2.UUCP (Mike Urban)
Newsgroups: comp.windows.x
Subject: Xaw Viewport Widget: bug?
Message-ID: <1467@spp2.UUCP>
Date: 11 Oct 88 19:26:19 GMT
Article-I.D.: spp2.1467
Sender: news@spp2.UUCP
Reply-To: urban@spp2.UUCP (Mike Urban)
Organization: TRW Inc., Redondo Beach, CA
Lines: 71

The following short toolkit program attempts to put a shallow
viewport in a form.  It does not work properly in this form;
the viewport is sized to the same size as the Box widget that
it contains.  If the CreateManagedWidget call for the box
widget is changed to a CreateWidget, and if ManageChild(box) is
performed after RealizeWidget, the behavior is what one would
expect.

Is this behavior a bug or a feature?  Is there some way
to get the viewport to maintain its specified size without
doing any work after RealizeWidget?  Thanks.

   Mike Urban
	...!trwrb!trwspp!spp2!urban 

"You're in a maze of twisty UUCP connections, all alike"


#include <stdio.h>
#include <X11/Xatom.h>
#include <X11/Intrinsic.h>
#include <X11/Atoms.h>
#include <X11/Box.h>
#include <X11/Label.h>
#include <X11/Viewport.h>
#include <X11/Form.h>

main (argc, argv) char **argv;
{
	Widget topshell, label, form, viewport, box;

	Arg arg[10];
	int	n;

	topshell = XtInitialize (NULL, "XTest", NULL, 0, &argc, argv);

	form = XtCreateManagedWidget ("form", formWidgetClass, topshell,
				NULL, 0);
	label = XtCreateManagedWidget ("Scrolled? :", labelWidgetClass, form,
				NULL, 0);
	
	n = 0;
	XtSetArg (arg[n], XtNfromHoriz, label); n++;
	XtSetArg (arg[n], XtNhorizDistance, 10); n++;
	XtSetArg (arg[n], XtNheight, 30); n++;
	XtSetArg (arg[n], XtNwidth, 200); n++;
	XtSetArg (arg[n], XtNresizable, False); n++;
	XtSetArg (arg[n], XtNallowVert, True); n++;
	viewport = XtCreateManagedWidget ("view", viewportWidgetClass, form,
			arg, n);

/* This call must be changed to XtCreateWidget */
	box = XtCreateManagedWidget ("box", boxWidgetClass, viewport,
			NULL, 0);

	XtSetArg (arg[0], XtNheight, 12); 
	XtSetArg (arg[1], XtNwidth, 200);
	for (n  = 0; n < 10; n++) {
		char label[10];
		sprintf (label, "Label %d", n);
		(void) XtCreateManagedWidget (label, labelWidgetClass, box,
			arg, 2);
	}
	XtRealizeWidget (topshell);
/* XtManageChild(box)    is needed here for proper operation */
	XtMainLoop();
}
   Mike Urban
	...!trwrb!trwspp!spp2!urban 

"You're in a maze of twisty UUCP connections, all alike"