The ACTION_POINTER_UP is used when a non-primary pointer (touch, mouse
stylus, eraser) goes up. Without handling this action in these
cases, the table event remains in 'down' state (misses the
QEvent::TabletRelease) and as a consequence when it is next put on the
screen, eg. a line will be drawn to the new position (in case of a drawing
application).
In addition use getActionMasked() to get the action; non-masked
events would contain the index of the pointer too, and wouldn't
match with ACTION_POINTER_UP whose numeric value is 6. Rather the
actions would be in the lines of:
261, // ACTION_POINTER_DOWN(1), 6 with getActionMasked()
517, // ACTION_POINTER_DOWN(2), 6 with getActionMasked()
And so on.
Pick-to: 6.6 6.5
Fixes: QTBUG-86297
Change-Id: I1b50ca4d19b611aec8a5c280ed0521e2f11797b0
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
3ee57b8387