I'm trying to make a drag zone on QML that prevents the mouse to go outside the window while dragging:

• start dragging, record start coordinate
• onPositionChanged, calculate mouse coord delta, emit event
• QCursor:::setPos move mouse back to start coord
• onPositionChanged...
• In the end the user is able to move something (like a slider, based on emitted delta events)
  while preventing the mouse to go outside the window

On 100% scaled screens it works fine, but on 125% scaled screen the moved "thing" starts drifting, e.g. if you move the mouse in a circle the "thing" starts to drift to the corner of the window.

My guess is QCursor::setPos accepts int arguments so each time it's not perfectly set to the start coordinate, causing a bias to the delta events.

Platform is Windows.

Thanks!