Re: gdk_window_foreign_new returns NULL

["Brian J. Tarricone" <bjt23 cornell edu>]

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jacktm wrote:
> jacktm wrote:
>
> > I'm working on a big project and I have to use
> > gdk_window_foreign_new function in it. It doesn't work
> > and always returns NULL. I've checked if I can use
> > it in a small application - just to see how does it work,
> > but unfortunately it doesn't work for me.  I attached
> > as simple test as I could do (just a tutorial program
> > + call to gdk_window_foreign_new). What's wrong?
> > What should I do to make it work?
[snip]
>       // Create the window
>       Window w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 
>                                    200, 100, 0, blackColor, blackColor);
>       gdk_win = gdk_window_foreign_new((guint32)w);
[...]
>       // "Map" the window (that is, make it appear on the screen)
>       XMapWindow(dpy, w);
[...]
>       // Wait for the MapNotify event
>       for(;;) {
>           XEvent e;
>           XNextEvent(dpy, &e);
>           if (e.type == MapNotify)
>                 break;
>       }

IIRC, you need to map the window and wait for the window to actually get
mapped *before* calling gdk_window_foreign_new().

        -brian
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