torrent_gui.py 文件源码

def _update_selection_label(self):
        selected_file_count = 0
        selected_size = 0
        for node, item in self._file_items:
            if item.checkState(0) == Qt.Checked:
                selected_file_count += 1
                selected_size += node.length

        ok_button = self._button_box.button(QDialogButtonBox.Ok)
        if not selected_file_count:
            ok_button.setEnabled(False)
            self._selection_label.setText('Nothing to download')
        else:
            ok_button.setEnabled(True)
            self._selection_label.setText(TorrentAddingDialog.SELECTION_LABEL_FORMAT.format(
                selected_file_count, humanize_size(selected_size)))