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10.1 菜单系统结构及组成 10.1.1 菜单系统结构及其概念

10.1 菜单系统结构及组成 10.1.1 菜单系统结构及其概念

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10.1 菜单系统结构及组成 10.1.1 菜单系统结构及其概念

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  1. 10.1 菜单系统结构及组成 10.1.1 菜单系统结构及其概念 用户在使用软件查找信息之前,首先看到的便是菜单,Visual FoxPro的菜单系统实际上是一个树型结构。菜单栏是指菜单最上面的一层,即几乎所有应用程序都有并始终都可看到的菜单名列表栏;菜单栏中的每个菜单名代表了一个主菜单选项,主菜单项的名称即菜单标题。例如:“文件”是一个主菜单项的标题,点击主菜单项将它展开,显示它所具有的子菜单选项。每一个主菜单项可以直接对应于一条命令或过程;一般每个主菜单对应有一个下拉菜单,下拉菜单中包含了一组菜单项;如果是对应于一个子菜单,则子菜单里又可包含一组相关的菜单项,它们又分别对应于一个子菜单或直接对应于一条命令,从而形成一个不断分支的树型结构。

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