Windows touchscreen DPI scaling

bee65

Anybody using Qt 6.2 on Windows with a high DPI touchscreen? I am getting a mix of scaled and unscaled coordinates when dragging with the touchscreen, resulting in jitter in objects dragged on the screen. The issue affects both MultiPointTouchArea and MouseArea, and doesn't occur in Qt 5.15.6

Here is some very simple code to show the problem:

import QtQuick 2.15
import QtQuick.Window 2.15

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

    Rectangle {
        id : red_rect
        x: 0
        y: 0
        width: 100
        height: 100
        color:"red"
    }

//    MultiPointTouchArea {
//        anchors.fill: parent
//        onTouchUpdated: function(touchPoints) {
//            if (touchPoints.length === 1)
//            {
//                let p = touchPoints[0]
//                console.log("Single touch at ", p.x, p.y)
//                red_rect.x = p.x - 50
//                red_rect.y = p.y - 50
//            }
//        }
//    }

    MouseArea {
        anchors.fill: parent
        
        onPressed : function(mouse) {
            mouse.accepted = true;
        }
        
        onPositionChanged: function(mouse) {
                let p = mouse
                console.log("Mouse drag at ", p.x, p.y, "source=", mouse.source)
                red_rect.x = p.x - 50
                red_rect.y = p.y - 50
        }
    }
}

bee65

@bee65 said in Windows touchscreen DPI scaling:
I found a bug report already on this: QTBUG-97185