QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::setCompositionMode: Painter not activeQPainter::end: Painter not active, aborted
一般是由于QPainter操作的绘图对象为空，将绘图对象初始化即可。
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QPainter::begin: Paint device returned engine == 0, type: 2
QPainter::setCompositionMode: Painter not activeQPainter::end: Painter not active, aborted
一般是由于QPainter操作的绘图对象为空，将绘图对象初始化即可。
转载于:https://www.cnblogs.com/niebing/p/3724940.html