QPaintEvent绘制雷达扫描图

上传者: aidam_bo | 上传时间: 2019-12-21 19:23:29 | 文件大小: 5.14MB | 文件类型: rar
1.使用图片的paintEvent只绘制坐标,扫描的动画使用图片的格式来实现,对图片不断进行旋转,这种方法对图片的透明度有要求。 2.使用多线程:使用多线程同时绘制多个图形,使用信号量对图形进行读取显示。 3.改变渐变填充的区域:这里的渐变填充是填充了整个圆形区域,可以改变填充的区域,使用drawPie绘制扇形进行渐变填充。

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