Changing the border of a QRubberBand

Hello,

In my program I draw rectangle rubberbands on a QGraphicsView with the mouse and I now I want to have the border of the rubber band have a marching ant kind of effect.
The first thing I am trying to to is subclassing the QRubberband and re-implementing the paintEvent. And also set the effect using a QTimer.
The QTimer is in my QGV class.

I simply set the timer up there.

Code:

---

...
   m_timer = new QTimer(this);
    connect(m_timer, SIGNAL(timeout()), this, SLOT(updateBorder()));
    m_timer->start(400);
...
 
void WaveObject::updateBorder()
{
    m_rubberBand->update(); //MyRubberBand object
}

---

Then in my QRubberband subclass I am trying a few things:

Code:

---

void MyRubberBand::paintEvent(QPaintEvent *event)
{
    QPen pen;
    QVector<qreal> dashes;
    qreal space = 2;
    dashes << 1 << space << 3 << space << 9 << space
           << 2 << space << 2 << space;
    pen.setDashPattern(dashes);
    pen.setDashOffset(m_offset);
 
    QStylePainter painter(this);
    QStyleOptionRubberBand option;
    initStyleOption(&option);
    painter.setPen(pen);
    painter.drawControl(QStyle::CE_RubberBand, option);
}

---

This doesn't do anything yet, which si expected because I don't really understand very well how the offset and setting patterns work. Can someone point in the right direction ?? Any help much appreciated.
Thanks!

Seems like all you need to do is to change "m_offset" in the timeout slot by incrementing it with each timeout (mod( pattern length) so it cycles from 0 to pattern length). Otherwise it looks to me like you have interpreted the dash pattern and offset methods correctly.