New touch gestures handling capabilities are now available to the UltraControlBase class providing you with the ability to allow or prevent their functionalities. The events listed below encapsulate gestures such as panning , zooming , rotating , press-and-tap , press-and-hold and two-finger-tap .
Touch Gestures Events
Gesture-Related Events
The following section details the touch gesture events in response to user interactions provided they are not cancelled.
Raised when the system gesture recognizer identifies the user interaction as a gesture supported by the operating system. It always follows the GestureQueryStatus event.
Setting the event argument’s Cancel property to True prevents any other events from being raised from this gesture.
Raised initially immediately following the GestureStarting event and continuously thereafter as the contact point changes location and immediately after losing contact. The gesture’s speed determines if the visible content continues to scroll following contact. This behavior is known as inertia or inertial panning.
Setting the event argument’s Handled property to True prevents the default actions scrolling, selecting and dragging depending on the direction of the initial movement, from occurring.
Raised initially immediately following the GestureStarting event and continuously thereafter as the contact point changes location and immediately after losing contact for example, as the user’s fingers move closer together or further apart.
Raised initially immediately following the GestureStarting event and continuously thereafter as the users second finger; non-stationary; continues to move for example, as the user’s finger moves around the pivot point.
There is no default action for the RotateGesture event.
Raised only once, immediately following the GestureStarting event.
Setting the event argument’s Handled property to True prevents the default actions scrolling, selecting and dragging depending on the direction of the initial movement, from occurring.
Initially, the first raised event coincides with the elapsing of the press-and-hold timeout, for example, when the amount of time specified by the PressAndHold property has elapsed.
Additionally, raised a second time when the user loses contact with the touch surface.
Setting the event argument’s Handled property to True prevents the default actions scrolling, selecting and dragging depending on the direction of the initial movement, from occurring.
