Qwt中鼠标获取坐标点
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1 void getPoint(QwtPlot *plot) 2 { 3 QPoint point = plot->canvas()->mapFromGlobal(QCursor::pos()); 4 QString info.sprintf("x = %g, y = %g", 5 plot ->invTransFrom(Qwtplot::xBottom,point.x()), 6 plot ->invTransFrom(Qwtplot::yLeft,point.y() 7 ); 8 }