onUpdate property

GestureScaleUpdateCallback? get onUpdate

The pointers in contact with the screen have indicated a new focal point and/or scale.

Implementation

GestureScaleUpdateCallback? onUpdate;

@override set onUpdate (GestureScaleUpdateCallback? callback)

The pointers in contact with the screen have indicated a new focal point and/or scale.

Implementation

@override
set onUpdate(GestureScaleUpdateCallback? callback) {
  _onUpdate = callback;
  super.onUpdate = callback == null ? null : _trackingUpdate;
}