本节在介绍图形用户界面一般构架的基础上，详细讨论嵌入式图形用户界面开发常见的底层支持库和高级函数库。这些内容都是Linux图形界面开发的基础知识-This section describes the general framework of graphical user interface based on the detailed discussion of embedded graphical user interface development a common underlying support libraries and advanced libraries. These elements are the Linux graphical interface development basics