Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!rpi!think.com!snorkelwacker.mit.edu!bloom-beacon!dont-send-mail-to-path-lines
From: fridman@cpsc.ucalgary.ca (Robert Fridman)
Newsgroups: comp.windows.x
Subject: icons and twm.
Message-ID: <9106051738.AA28487@fsa.cpsc.ucalgary.ca>
Date: 5 Jun 91 17:38:05 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 157

My problem is the following:

If I use XSetStandardProperties and specify an icon to window manager, the
icon can not be destroyed.  In other words, if I XFreePixmap(my icon) after
setting the standard properties, the window manager looses the icon.

I'v included a test program.  If you try to iconify, you'll get my
icon.  But if you uncomment line 132, and try to iconify, you'll get no
icon at all!.

It would seem to me that the window manager should cach the icon pixmap.

Any ideas?

setup: sparc 1, sunos 4.1.1, mit X11R4, twm.

----------------------------- test.c -------------------------------------
/*
** file: test.c
*/

#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <X11/Xutil.h>
#include <stdio.h>

#define ICON_NAME "test"
#define WINDOW_NAME "test"

#define err(x) fprintf(stderr,x)

#define X_RES	300
#define Y_RES	300

/*
** the icon pixmap.
*/
#define icon_width 48
#define icon_height 48
static char icon_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x03, 0x00, 0x00,
   0x00, 0x80, 0x07, 0x3c, 0x00, 0x00, 0x00, 0x60, 0x00, 0xc0, 0x00, 0x00,
   0x00, 0x18, 0x00, 0x00, 0x03, 0x00, 0x00, 0x04, 0x00, 0x00, 0x04, 0x00,
   0x00, 0xc2, 0x07, 0x3e, 0x08, 0x00, 0x00, 0x21, 0x08, 0x41, 0x10, 0x00,
   0x80, 0x10, 0x90, 0x80, 0x20, 0x00, 0x40, 0x10, 0x90, 0x8e, 0x40, 0x00,
   0x20, 0x10, 0x97, 0x9e, 0x80, 0x00, 0x20, 0x10, 0x97, 0x9e, 0x80, 0x00,
   0x10, 0x10, 0x93, 0x80, 0x00, 0x01, 0x10, 0x20, 0x9c, 0x41, 0x00, 0x01,
   0x08, 0xc0, 0x07, 0x3e, 0x00, 0x02, 0x08, 0x00, 0x00, 0x00, 0x00, 0x02,
   0x08, 0x00, 0x00, 0x00, 0x00, 0x02, 0x08, 0x00, 0x00, 0x00, 0x00, 0x02,
   0x04, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x04,
   0x04, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x04,
   0x04, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x04,
   0x04, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08, 0x00, 0x00, 0x00, 0x00, 0x02,
   0x08, 0x00, 0x00, 0x00, 0x02, 0x02, 0x08, 0x04, 0x00, 0x00, 0x01, 0x02,
   0x08, 0x08, 0x00, 0x80, 0x00, 0x02, 0x10, 0x08, 0x00, 0x80, 0x00, 0x01,
   0x10, 0x10, 0x00, 0x40, 0x00, 0x01, 0x20, 0x10, 0x00, 0x40, 0x80, 0x00,
   0x20, 0x20, 0x00, 0x20, 0x80, 0x00, 0x40, 0xc0, 0x00, 0x18, 0x40, 0x00,
   0x80, 0x00, 0x03, 0x06, 0x20, 0x00, 0x00, 0x01, 0xfc, 0x01, 0x10, 0x00,
   0x00, 0x02, 0x00, 0x00, 0x08, 0x00, 0x00, 0x04, 0x00, 0x00, 0x04, 0x00,
   0x00, 0x18, 0x00, 0x00, 0x03, 0x00, 0x00, 0x60, 0x00, 0xc0, 0x00, 0x00,
   0x00, 0x80, 0x07, 0x3c, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x03, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};


Display *disp;	/* my display	*/
Window win;	/* my window	*/
GC gc;		/* my GC	*/
XEvent evnt;	/* my exent	*/
int scrn;	/* screen	*/

main(argc,argv)
int argc;
char *argv[];
{
XEvent evnt;

	initx();

	while(1){
		XNextEvent(disp,&evnt);
		switch (evnt.type){
		case Expose:
			XClearWindow(disp,win);
			XDrawArc(disp,win,gc,50,50,200,200,0,360*64);
			XDrawArc(disp,win,gc,90,80,50,50,0,360*64);
			XDrawArc(disp,win,gc,160,80,50,50,0,360*64);
			XDrawArc(disp,win,gc,80,125,140,100,0,-180*64);
			break;
		case ButtonPress:
			XCloseDisplay(disp);
			exit(0);
               }
       }

}
/***************************************************************************
** FUNCTION: initx
**
***************************************************************************/
initx()
{
unsigned long att_flags;
XSetWindowAttributes att;
Pixmap icon_pix;
XSizeHints size_hints;
XGCValues gcatt;

	if ((disp = XOpenDisplay(NULL)) == NULL){
		err("Can't open display.\n");
		exit(-1);
	}

	scrn = DefaultScreen(disp);

/*
** now set up the window
*/
	att_flags = CWEventMask | CWBackPixel;
	att.event_mask = ButtonPressMask | ExposureMask;
	att.background_pixel = BlackPixel(disp,scrn);
	win = XCreateWindow(disp,RootWindow(disp,scrn),100,100,X_RES,Y_RES,5,
				CopyFromParent,InputOutput,CopyFromParent,
				att_flags,&att);

/*
** and give hints to the window manager like the icon to use, max/min size
** of the window that I want.
*/
	icon_pix = XCreatePixmapFromBitmapData(disp,RootWindow(disp,scrn),
		icon_bits,icon_width,icon_height,BlackPixel(disp,scrn),
		WhitePixel(disp,scrn),DefaultDepth(disp,scrn));
	size_hints.flags = PMinSize | PMaxSize;
	size_hints.min_width = size_hints.max_width = X_RES;
	size_hints.min_height = size_hints.max_height = Y_RES;
	XSetStandardProperties(disp,win,WINDOW_NAME,ICON_NAME,icon_pix,NULL,0,
		&size_hints);

/*
** Create the GC to draw with.
*/
	att_flags = GCForeground | GCBackground;
	gcatt.foreground = WhitePixel(disp,scrn);
	gcatt.background = BlackPixel(disp,scrn);
	gc = XCreateGC(disp,win,att_flags,&gcatt);

/*
** free what we no longer need since the values are stored in the appropriate
** structure above.
*/

/*	XFreePixmap(disp,icon_pix); /*	/* can't destroy this one */


	XMapWindow(disp,win);
}