Revisiting GestureRecognizer
GestureRecognizer has one mouse (and pen)-specific event not covered previously: Dragging. Whereas a single-finger touch-based swipe gesture generates series of CrossSliding events depending on its direction, the same motion from a mouse with any button down (or from a pen while in contact) generates a series of Dragging events instead.
Like CrossSliding, Dragging reports many different states to event handlers with an enumeration—this time called DraggingState. The pattern is the same: an event raised with a Started state, followed by many with a Continuing state, followed by one with a Completed state. Unlike CrossSliding, Dragging is reported for any direction.
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