实现编辑框内添加删除按钮

上传者: nrahbsqtym | 上传时间: 2019-12-21 20:23:54 | 文件大小: 544KB | 文件类型: rar
重写QLineEdit,实现编辑框添加删除按钮的功能,当编辑框获得焦点并且北荣不为空时。删除按钮就会显示。

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