Fullscreen WITHOUT window decoration

[Russell Shaw]

Philip Pflästerer wrote:
> Hi,
> 
> i want to develop a fullscreen application by using the xlib functions.
> Fullscreen means also NO window decoration. Normaly the window
> decoration is provided by the window manager. To ignore the window
> manager, i set the override_redirect flag to TRUE.
> 
> XSetWindowAttributes setwinattr;
> setwinattr.override_redirect = True;
> 
> XChangeWindowAttributes(display, win, valuemask, &setwinattr);
> 
> This works fine so far, i have total control over the size, position an
> decoration (none) of the window. Unfortunatly, the window doesn't
> disappear when i change the focus to another window (for example by
> pressing ALT+TAB). It alway stays mapped on top, so I can't see the
> other windows or even the desktop. If I unmap the window manually,
> there's no way to get it back on screen because there's no entry in the
> task-bar. I guess these features are controlled by the window manager I
> set to be ignored with the code above.
> 
> So my question is: How can I realize a fullscreen application WITHOUT
> ignoring the window manager? If that's not possible, how can I solve the
> problem described above?

If you have a net-wm window manager, you could try setting _NET_WM_STATE_FULLSCREEN.

http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html