Dear all,
I am using Xfce4, and I want to draw something on xfdesktop4.
So I got its gdk_window, and create a cairo context on it.
GdkDrawable *window;
cairo_t *cc;
window = gdk_window_foreign_new (netk_window_get_xid (g_list_first
(netk_screen_get_windows_stacked (netk_screen_get_default ()))->data));
if (window == NULL) {
g_print ("wrong");
return 0;
}
cc = gdk_cairo_create (window);
But as I drew a white line on cc, the desktop window became black,
with a white line on it. While xfdesktop4 was still running, menu or
something worked well.
Why does this happen? Thanks.
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