onSwipe method
Called when a single-pointer swipe (fling) gesture occurs.
Swipe events consist of a pointer down, rapid move, and release.
Parameters
distX: Horizontal delta in pixels.distY: Vertical delta in pixels.speedMmPerSec: Swipe speed in millimetres per second.
Implementation
@override
void onSwipe(final int distX, final int distY, final double speedMmPerSec) {
_swipeCallback?.call(distX, distY, speedMmPerSec);
}