def set_mask(win):
    size = win.window.get_size()
print(size)
bitmap = gtk.gdk.Pixmap(win.window, size[0], size[1], 1)
cr = bitmap.cairo_create()
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.set_source_rgba(0.0, 0.0, 0.0, 0.0)
cr.rectangle((0, 0) + size)
cr.fill()
win.window.input_shape_combine_mask(bitmap, 0, 0)
print('ready')
gobject.timeout_add(5000, set_mask, win)
Как нажать через gtk.Window?