qt qbrush设置填充与取消填充

void MainWindow::paintEvent(QPaintEvent *event){QMainWindow::paintEvent(event);QPainterpainter(this);painter.setBrush(Qt::blue);painter.drawRect(10,10,100,100);//停止填充 painter.setBrush(Qt::NoBrush);painter.drawRect(120,10,100,100);}