@Override
  public void onGestureUpdate(TransformGestureDetector detector) {
    FLog.v(TAG, "onGestureUpdate");
    boolean transformCorrected = calculateGestureTransform(mActiveTransform, LIMIT_ALL);
    onTransformChanged();
    if (transformCorrected) {
      mGestureDetector.restartGesture();
    }
    // A transformation happened, but was it without correction?
    mWasTransformCorrected = transformCorrected;
  }
Notifies controller of the received touch event.
samples/zoomable/src/main/java/com/facebook/samples/zoomable/DefaultZoomableController.java