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用于画矩形框

于 2022-02-02 发布 文件大小:49.03 kB
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代码说明:

用来在界面上拖动鼠标来完成矩形的绘制,可以快速的画出矩形,但是这样的矩形不知道尺寸以及位置信息,同时矩形可以相互干扰。

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