on
open fun onPinchSwipe(centerPosInPix: Xy, zoomingSpeedInMMPerSec: Double, rotatingSpeedInMMPerSec: Double)
Two pointer rotating and zooming, or just zooming, swipe event.
Parameters
"rotatingSpeedInMMPerSec" is the moving speed in mm / s of the faster of the 2 pointers; negative to rotate to the left/counterclockwise, positive to rotate to the right/clockwise, set to 0 for zooming swipe only.