onScaleUpdate method

void onScaleUpdate(
  1. double rotation,
  2. double scale
)

Implementation

void onScaleUpdate(double rotation, double scale) {
  if (_rotationState == RotationState.uninitialized &&
      rotation.abs() > rotationDeadzone) {
    _rotationState = RotationState.enabled;
  }
  if (_rotationState == RotationState.uninitialized &&
      (scale - 1.0).abs() > scaleDeadzone) {
    _rotationState = RotationState.disabled;
  }
}