How to make painting on mouse move?

[athulms]

void drawings::mouseMoveEvent(QMouseEvent *)
{
    point=this->mapFromGlobal(QCursor::pos());
    this->repaint();
}
void drawings::paintEvent(QPaintEvent *event)
{
 
        painter= new QPainter(this);
        QPen linepen(Qt::cyan);
        linepen.setCapStyle(Qt::RoundCap);
        linepen.setWidth(30);
        painter->setRenderHint(QPainter::Antialiasing,true);
        painter->setRenderHint(QPainter::SmoothPixmapTransform,true);
        painter->setPen(linepen);
        painter->drawPoint(point);
}

void drawings::mouseMoveEvent(QMouseEvent *)
{
    point=this->mapFromGlobal(QCursor::pos());
    this->repaint();
}
void drawings::paintEvent(QPaintEvent *event)
{

        painter= new QPainter(this);
        QPen linepen(Qt::cyan);
        linepen.setCapStyle(Qt::RoundCap);
        linepen.setWidth(30);
        painter->setRenderHint(QPainter::Antialiasing,true);
        painter->setRenderHint(QPainter::SmoothPixmapTransform,true);
        painter->setPen(linepen);
        painter->drawPoint(point);
}

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this call repaint on mouse move event.but we can see the image moving with the mouse. ie, i can see only one point at a time. i have to make painting as we draw in MS paint

[ChrisW67]

Scribble Example or the Plug and Paint example.