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import gtk
import cairo
class OverlayWindow(gtk.Window):
def __init__(self, lower_window):
gtk.Window.__init__(self)
colormap = self.get_screen().get_rgba_colormap()
colormap=None
if not colormap:
raise RuntimeError("The window manager doesn't support compositing.")
self.set_colormap(colormap)
self.realize()
self.window.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_DIALOG)
self.window.set_accept_focus(False)
self.window.set_transient_for(lower_window)
self.set_decorated(False)
self.set_position(gtk.WIN_POS_CENTER_ALWAYS)
self.set_default_size(gtk.gdk.screen_width(), gtk.gdk.screen_height())
self.set_app_paintable(True)
self.connect('expose-event', self._expose_cb)
def _expose_cb(self, widget, event):
cr = widget.window.cairo_create()
cr.set_source_rgba(0.0, 0.0, 0.0, 0.4) # Transparent
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.paint()
return False
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