--- /dev/null
+/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
+
+ stacking.c for the Openbox window manager
+ Copyright (c) 2007 Dana Jansens
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ See the COPYING file for a copy of the GNU General Public License.
+*/
+
+#include <stdio.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xatom.h>
+
+int main () {
+ Display *display;
+ Window parent, child1, child2, group;
+ XEvent report;
+ int x=10,y=10,h=400,w=400;
+ XWMHints *hints;
+
+ display = XOpenDisplay(NULL);
+
+ if (display == NULL) {
+ fprintf(stderr, "couldn't connect to X server :0\n");
+ return 0;
+ }
+
+ group = XCreateWindow(display, RootWindow(display, 0),
+ x, y, w, h, 10, CopyFromParent, CopyFromParent,
+ CopyFromParent, 0, 0);
+ parent = XCreateWindow(display, RootWindow(display, 0),
+ x, y, w, h, 10, CopyFromParent, CopyFromParent,
+ CopyFromParent, 0, 0);
+ child1 = XCreateWindow(display, RootWindow(display, 0),
+ x, y, w/2, h/2, 10, CopyFromParent, CopyFromParent,
+ CopyFromParent, 0, 0);
+ child2 = XCreateWindow(display, RootWindow(display, 0),
+ x, y, w/2, h/2, 10, CopyFromParent, CopyFromParent,
+ CopyFromParent, 0, 0);
+
+ XSetWindowBackground(display,parent,WhitePixel(display,0));
+ XSetWindowBackground(display,child1,BlackPixel(display,0));
+ XSetWindowBackground(display,child2,WhitePixel(display,0));
+
+ hints = XAllocWMHints();
+ hints->flags = WindowGroupHint;
+ hints->window_group = group;
+ XSetWMHints(display, parent, hints);
+ XSetWMHints(display, child1, hints);
+ XSetWMHints(display, child2, hints);
+ XFree(hints);
+
+ XSetTransientForHint(display, child1,
+ RootWindow(display, DefaultScreen(display)));
+ XSetTransientForHint(display, child2, parent);
+
+ XMapWindow(display, parent);
+ XFlush(display);
+ sleep(3);
+ XMapWindow(display, child1);
+ XFlush(display);
+ sleep(3);
+ XMapWindow(display, child2);
+
+ while (1) {
+ XNextEvent(display, &report);
+ }
+
+ return 1;
+}