gestures. Whenever such a decision is made (the gesture is recognized), the clients will be
notified with a QEvent::TouchCancel event so they can update their state accordingly.
- The touchPoints() function returns a list of all touch points contained in the event.
- Information about each touch point can be retrieved using the QTouchEvent::TouchPoint class.
- The Qt::TouchPointState enum describes the different states that a touch point may have.
+ The touchPoints() function returns a list of all touch points contained in the event. Note that
+ this list may be empty, for example in case of a QEvent::TouchCancel event. Information about
+ each touch point can be retrieved using the QTouchEvent::TouchPoint class. The
+ Qt::TouchPointState enum describes the different states that a touch point may have.
\section1 Event Delivery and Propagation