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TUIO supports tracking tagged physical objects on touchscreens by
various means (QR codes, RFIDs etc.) It can detect both position
and rotation. Likewise, it may be possible for some touchscreens or
drivers to detect orientation of the fingers. So, just as QTabletEvent
has rotation, each touchpoint needs to include the rotation value.
When using tokens, each object has a permanent unique ID, whereas
QTouchEvent::TouchPoint::id() is a transient ID which usually auto-
increments each time a finger is pressed to the device. So we need to
make that available too, to identify each token. Different platforms
may use different kinds of IDs (int, UUID, QR code etc.); however for
TUIO 1.x, the unique IDs are just 32-bit integers. QPointerUniqueId
is added, storing only a qint64 for now (like QTabletEvent::uniqueId())
but able to be expanded as necessary later on.
Task-number: QTBUG-51844
Change-Id: I04182042f47fa2954728079139a4664a31184b54
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
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