thumbnail.py 文件源码

def __init__(self, id_, url, cancellable, gallery):
        Gtk.Button.__init__(self)
        self.id_ = id_

        def download_complete_cb(loader, path):
            width, height = ThumbnailGallery.THUMBNAIL_SIZE_CONTRAINTS
            pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_scale(
                        path,
                        width, height,  # width, height constraints
                        True)  # respect image proportionality
            im = Gtk.Image.new_from_pixbuf(pixbuf)
            self.add(im)
            self.show_all()

        loader = SimpleFileDownloader()
        loader.connect("file-download-complete", download_complete_cb)
        loader.download_file(
            url, use_cache=ScreenshotGallery.USE_CACHING)

        self.connect("draw", self.on_draw)