def cw_btn_clicked(self, *args):
def cleanup(arg):
del self.cw
self.cw = None
if not self.cw:
home = expanduser("~")
self.cw = CoverWindow(self.source.plugin, self.cw_btn.get_toplevel(), home)
self.cw.connect('close-window', cleanup)
self.cw.show_all(' ', self.pixbuf)
