how to draw outside paintevent?

[athulms]

void MainWindow::mousePressEvent(QMouseEvent *e)
{
    point=e->pos();
    setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
    QPainter painter(ui->frame);
    QPen linepen(Qt::red);
    linepen.setCapStyle(Qt::RoundCap);
    linepen.setWidth(30);
    painter.setRenderHint(QPainter::Antialiasing,true);
    painter.setPen(linepen);
    painter.drawPoint(point);
}

void MainWindow::mousePressEvent(QMouseEvent *e)
{
    point=e->pos();
    setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
    QPainter painter(ui->frame);
    QPen linepen(Qt::red);
    linepen.setCapStyle(Qt::RoundCap);
    linepen.setWidth(30);
    painter.setRenderHint(QPainter::Antialiasing,true);
    painter.setPen(linepen);
    painter.drawPoint(point);
}

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I used this code but it doesnt work