Re: GdkEventMask?

[Andreas Volz <andreas brachttal net>]

Am Thu, 10 Jul 2003 09:42:08 -0400 schrieb Tristan Van Berkom:

> > rootwindow = gdk_window_foreign_new
> > (gdk_x11_get_default_root_xwindow());
> 
> hmmm, this is in some kind of callback function ?
> 
> This is just an educated guess but here goes:
> 
> this:
> 
>     gdk_x11_get_default_root_xwindow()
> 
> will probably return an int (XID) reference to an X resource (which is
> an "x window" in
> this case).
> 
> and this:
> 
>    gdk_window_foreign_new(XID *)
> 
> _will_ create a new GdkWindow.
> 
> a  "GdkEventMask" will apply to some flags in the newly created
> "GdkWindow"; it will affect what events you have filtered out in
> the "gdk" api; not the "xlib" api.
> 
> so; you want to create _one_ GdkWindow and only reference it
> in your callbacks. (you probably had some memory leak also
> from the continous creation of GdkWindow objects).

I'm not sure if I understand you right, but my app doesn't create a new
window. My app react only for a GDK_BUTTON_PRESS_MASK in the root
window. So it's a add-on for WM's without a root menu. And it works
great.

But when I start my app with a WM running that graps the
GDK_BUTTON_PRESS_MASK it crashes with this error. I wish to detect if
the GDK_BUTTON_PRESS_MASK is yet grapped for the root window and exit my
app.

I think the way it try to do it should work, but it doesn't. Why?

Perhaps now it's better to understand what I try to do.

thanks
Andreas