Wolfman writes: > 1.Do u know how to get the HWND(is there a way to get the HWND from > HGDIOBJ?)
I don't know about HGDIOBJ, but you can get the HWND for a Gdk window by including <gdk/gdkwin32.h> and using the function gdk_win32_drawable_get_handle(). > Its looks quit easy under win32: > > // Set WS_EX_LAYERED on this window > SetWindowLong(hwnd, GWL_EXSTYLE, > GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_LAYERED); > // Make this window 70% alpha > SetLayeredWindowAttributes(hwnd, 0, (255 * 70) / 100, LWA_ALPHA); Please do experiment an tell us what you find out. I have been planning to hack on alpha windows for a long time, but never got around to do it. I haven't done any actual tests, but if I recall correctly, I got the impression that one would need to rethink lots of the way stuff is drawn to windows if they are layered. But I might have misunderstood something. > The problem is how to get this mechanism to GTK+ or better to cairo? > Target function: cairo_set_source_rgba > Is it possible to get the hwnd from cairo_t struct? Hmm, you can get the HDC with cairo_win32_surface_get_dc(), but I don't think there is any way to get the HWND from the HDC, oddly enough. --tml _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
