exhibits.py 文件源码

def _fade_in(self, step=0.05):
        self.alpha = 0.0

        def fade_step():
            retval = True
            self.alpha += step

            if self.alpha >= 1.0:
                self.alpha = 1.0
                self.old_image = None
                retval = False

            self.queue_draw()
            return retval

        GObject.timeout_add(50, fade_step)