Support multiple touch targets in QGraphicsView

This required a larger change to the kernel and graphicsview directories to
make this as efficient as possible:

1. QTouchEvent::TouchPoint becomes the base for
QGraphicsSceneTouchEvent::TouchPoint - this means there is one private for
every touch point, and we can store both the screen and scene coordinates
in one place. Converting a QTouchEvent to QGraphicsSceneTouchEvent becomes
nothing more than casting the QTouchEvent::TouchPoints to
QGraphicsSceneTouchEvent::TouchPoints.

2. The logic that we use in QApplication to convert WM_TOUCH* messages to
QTouchEvents is essentially duplicated (with some minor changes) to
QGraphicsScene so that it can support mulitple touch item targets. I
will have to investigate how I can perhaps merge some of the duplicated
code.

QEvent::GraphicsSceneTouchBegin propagation is not implemented yet, and will
come in a later commit

0 files changed, 0 insertions, 0 deletions