QQuickFlickable: fix flicking when item is rotated

QEventPoint::velocity() is in screen coordinates, as documented; it needs
to be transformed to local coordinates in case the Flickable is rotated
and/or scaled. windowToItemTransform() gives us a composite transform
matrix; we remove the translation components to get only the rotation
and scaling.

Also fix the press position calculation in handleReleaseEvent().

With the manual test one can pinch to scale and rotate a Flickable, then
verify that with a single finger, the Flickable gets scrolled by an
appropriate distance in spite of that.

Done-with: Ivan Solovev
Fixes: QTBUG-99639
Pick-to: 6.3 6.2
Change-Id: I60af1dd932835d358baa1422523cc24b2ab046a0
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

0 files changed, 0 insertions, 0 deletions