Android: Treat ACTION_CANCEL as TouchPointReleased

If TouchPointPressed was previously send and there is no
TouchPointReleased, we are exposed to uncorrectly handled touches
by application.

Some Android devices can recognize hand gestures. In some case the
gesture may be handled by Android System. In this situation
ACTION_CANCEL MotionEvent is delivered

ACTION_CANCEL - from Android specification:
-"Occurs when the parent takes possession of the motion, for example
when the user has dragged enough across a list view that it will start
scrolling instead of letting you press the buttons inside of it"
-"The current gesture has been aborted. You will not receive any more
points in it. You should treat this as an up event, but not perform
any action that you normally would"

If ACTION_CANCEL appears it means that ACTION_UP will not be delivered
to application. That is why ACTION_CANCEL need to be treat as
TouchPointReleased event.

Fixes: QTBUG-72110
Pick-to: 5.15
Change-Id: I8f32930cdb424b7530adc87b8334ac48a3bb9d57
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

0 files changed, 0 insertions, 0 deletions