def on_props_activated(self, menu_item):
        '''显示选中的文件或者当前目录的属性'''
        tree_paths = self.iconview.get_selected_items()
        if not tree_paths:
            dialog = FolderPropertyDialog(self, self.app, self.parent.path)
            dialog.run()
            dialog.destroy()
        else:
            for tree_path in tree_paths:
                pcs_file = self.get_pcs_file(tree_path)
                dialog = PropertiesDialog(self.parent, self.app, pcs_file)
                dialog.run()
                dialog.destroy()