When QGuiApplicationPrivate::processTouchEvent() sees that the
touch event was not handled, and calls processMouseEvent(), the latter
uses the QEventPoint with pointId 0 regardless of the original
touchpoint ID. Now it updates the persistent QEventPoint from the
original touchpoint so that a double-click event will not be ruled out
because of the timestamp delta or position delta (movement since press)
being too large.
Fixes: QTBUG-125993
Pick-to: 6.7 6.5
Change-Id: I8e9b007818107ac2329454e0ccfb2ac9e506b617
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 2a0b907f11b9c0ad46322ba06482861423246d93)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
b1481a1663