QT在指定窗口里添加图画怎么弄
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QPainter painter(tab_2);//有个QWidget叫tab_2,在那里添加
painter.setRenderHint(QPainter::Antialiasing,true);
painter.setPen(QPen(Qt::black,12,Qt::DashDotDotLine,Qt::RoundCap));
painter.setBrush(QBrush(Qt::green,Qt::SolidPattern));
painter.drawEllipse(80,80,400,240);
painter.setRenderHint(QPainter::Antialiasing,true);
painter.setPen(QPen(Qt::black,12,Qt::DashDotDotLine,Qt::RoundCap));
painter.setBrush(QBrush(Qt::green,Qt::SolidPattern));
painter.drawEllipse(80,80,400,240);
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