Based on the low-level pointer events pointer.md#pointer_events, the following
gesture events are available in all three of Qooxdoo's GUI toolkits (qx.Desktop,
qx.Mobile and qx.Website):
- tap: A brief finger/stylus tap or mouse click
- longtap: A tap that is held down for 500 milliseconds
- dbltap: Two taps in quick succession
- swipe: Horizontal or vertical swipe motion
- rotate: Two contact points (e.g. fingers) rotating around a central point
- pinch: Two contact points moving towards or away from each other
- track: Cross-device equivalent to mouse drag (fired only between pointerdown and pointerup)