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Editorial Team
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Asked: 2026-05-28T00:20:48+00:00

I’m looking for a way to implement gestures for zoom, pan and rotate in

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I’m looking for a way to implement gestures for zoom, pan and rotate in a 3d app. I’m using a ScaleGestureDetector for the zoom events and a GestureDetector for the pan. I was hoping to be able to differentiate between a two-finger scroll and a one-finger scroll through the getPointerCount() method on the MotionEvent that comes in, but any time it sees it as a two-point scroll, the scale detector kicks in. the regular detector never gets passed a motionevent where the pointer count is > 1.

any ideas? is it a matter of setting a span threshold internally and returning false from the onScale event when it’s below the threshold?

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1 Answer

  1. Editorial Team

    What you mentioned is one option. You can return false in the onScaleBegin() when it is below the threshold.

    Also, there is a GestureDetector constructor which takes a boolean ignoreMultiTouch. If you set this to false, it will still attempt to interpret the gestures, even with multiple pointers. I don’t know how well it would work out with a scale detector at the same time.

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