[Interest] Handling stylus input on a tablet in QML/QtQuick

[Thorsten Hofer-Schmitz]

Hi

I'm trying to handle the input of a stylus on a tablet. Qt has an 
example on how to do this using a QWidget-based application. I tested it 
on my tablet and everything works fine.

I would like to do this in QML/QtQuick. The documentation suggests that 
PointHandler, like this:

import QtQuick 2.14
import QtQuick.Window 2.14

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    PointHandler
    {
        acceptedDevices: PointerDevice.Stylus
        acceptedPointerTypes: PointerDevice.Pen
        onActiveChanged: console.log("Pen Input")
    }

}

But it doesn't work, and I can't find out how to make it work.

I experimented with eventFilter's to intercept QTabletEvent's before 
they are converted into mouse events by the QQuickWindow (as far as I 
can tell). But unless there is a QWidget with WA_TabletTracking=true as 
target (and some other options as it seems, because just a QMainWindow 
with a widget isn't enough) I can't recieve TabletEnterProximity-events 
for hovering.

Does someone know how to do this?

Regards

Thorsten
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