然而，因为窗口处于全屏幕方式，所以paint方法所需的开销、该方法如何处理剪裁以及其它与显示处理相关的行为都是不必要的。

However, because the window is in fullscreen mode, the overhead required for the paint method, how the method deals with clipping, and other associated display-handling behaviors are unnecessary.

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全屏模块：对需要完全控制该页面的模块进行处理。

Full-screen modules: Handle modules that require full control of the page.

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