StateDrag is reported during drag gestures.

StateFlinging is reported when a fling is in progress.

StateIdle is the default scroll state.

TypeCancel is reported when the gesture is cancelled.

TypeClick is reported when a click action is complete.

TypePress is reported for the first pointer press.

Click detects click gestures in the form of ClickEvents.

ClickEvent represent a click action, either a TypePress for the beginning of a click or a TypeClick for a completed click.

Drag detects drag gestures in the form of pointer.Drag events.

Scroll detects scroll gestures and reduces them to scroll distances.