onPointerSignal property

OnPointerSignal get onPointerSignal

Implementation

OnPointerSignal get onPointerSignal =>
    _onPointerSignal ??
    (pointerSignal) {
      if (pointerSignal is PointerScrollEvent) {
        var zoomDelta = pointerSignal.scrollDelta.dy.sign * zoomPerScrollUnit;
        if (scale.value + zoomDelta > 0) {
          var oz = scale.value;
          scale.value += zoomDelta;
          var nz = scale.value;
          keepCenter(oz, nz, size.value, pointerSignal.localPosition, offset);
        }
      }
    };

set onPointerSignal (OnPointerSignal? v)

Implementation

set onPointerSignal(OnPointerSignal? v) => _onPointerSignal = v;