[Qt][绘图][上]详细讲解

void Widget::paintEvent(QPaintEvent *event) { QPainter painter(this); painter.drawEllipse(QPoint(100, 200), 100, 100); painter.translate(200, 0); // 让画家移动 painter.save(); // 保存画家状态 painter.drawEllipse(QPoint(100, 200), 100, 100); painter.translate(200, 0); // 让画家移动 painter.restore(); // 还原画家状态 painter.drawEllipse(QPoint(100, 200), 100, 100); }