The three .giffiles are, as you might expect from their names, used by GWT in rendering tree widgets.
三个 .gif 文件，正如您可以从名称推断的那样，将由 GWT 用于显示树小部件。
2
It presents snapshot views of a system, even though there is limited support here and there to make these views more dynamic; for example, with Powerpoint custom animations and animated GIFfiles.