Re: gdk_window_foreign_new returns NULL

[Owen Taylor <otaylor redhat com>]

On Fri, 2005-04-22 at 01:19 +0200, jacktm wrote:


>       // Open the display
>       Display *dpy = XOpenDisplay(NIL);
>       assert(dpy);
>
>       // Get some colors
>       int blackColor = BlackPixel(dpy, DefaultScreen(dpy));
>       int whiteColor = WhitePixel(dpy, DefaultScreen(dpy));
>
>       // Create the window
>       Window w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 
>                                    200, 100, 0, blackColor, blackColor);
>       gdk_win = gdk_window_foreign_new((guint32)w);

If you used the GTK+ display, rather than opening a new one, this code
would work.

But here, the problem is that the command to create 'w' is still queued
up in the buffers for the 'dpy' display, and has not been sent to the
server or processed. 

So, either use GDK_DISPLAY() rather than dpy, or call XSync (dpy,
False); after calling XCreateSimpleWindow()

Regards,
                                                Owen