Pass list of TouchPoints from QML to C++

Michael Sjostrom

I'm using a MultiPointTouchArea in QML and I somehow need to pass its list of TouchPoints to C++.
My first option would be to pass the list of touchpoints whenever onPressed, onReleased and onUpdated is triggered, e.g.

QML:

MultiPointTouchArea  {
  minimumTouchPoints: 1
  maximumTouchPoints: 2

  touchPoints: [
    TouchPoint { id: touch1 },
    TouchPoint { id: touch2 }
  ]

  onPressed: {
    myCPlusPlusClass.onPressed(touchPoints)
  }
}

C++:

void myCPlusPlusClass::onPressed(const QList<QTouchEvent::TouchPoint>& list) 
{
  // Do something
}

I have registered QListQTouchEvent::TouchPoint as a metatype like so:

qRegisterMetaType<QList<QTouchEvent::TouchPoint>>("QList<QTouchEvent::TouchPoint>");

But all i get is a list full of nullptrs or similar.

My second best option would be to pass each TouchPoint individually but I run into the same problem.

Is this possible to solve?
If not, what are my options to pass the info i need to C++ side?

dheerendra

I suspect that this is not possible. TouchPoint may not be QTouchPoint. May be you can try passing the required values for each touchpoint.