propagateComposedEvents for MultiPointTouchArea

therealmatiss

Hello! I was wondering why is there no propagateComposedEvents available for MultiPointTouchArea?

The idea is that to have a MultiPointTouchArea, which rotates/zooms/pans an object and the underlying object has buttons. Unfortunately it's not possible to press those buttons with MultiPointTouchArea on top of it.

What are the solutions to this problem?

johngod

It will only work with buttons on top of MultiTouchPointArea. It this is not possible, one hacky solution is to mimic the buttons, put them on top, and bind their position to the underlying buttons positions.

therealmatiss

@johngod It's very unfortunate. Is this an intended thing or a bug that there's no propagataComposedEvents for MultiPointTouchArea? I mean the only difference from MouseArea is multiple inputs at once.

johngod

Hi @therealmatiss Since it is not in the MultiPointTouchArea docs it should not be a bug, maybe it just was not developed for it. You can ask about it in the qt dev mailing list and create a feature request in qt bug report https://bugreports.qt.io/secure/Dashboard.jspa. I am a bit work overloaded right now but when I find the time I will try to check qt code and see if this would be feasible to port.