hitTest method

bool hitTest(Vec2D position, { PointerEvent? pointerEvent, ListenerType? hitEvent, })

Hit testing. If any listeners were hit, returns true.

Implementation

bool hitTest(
  Vec2D position, {
  PointerEvent? pointerEvent,
  ListenerType? hitEvent,
}) {
  var artboard = this.artboard;
  if (artboard == null) {
    return false;
  }
  if (artboard.frameOrigin) {
    // ignore: parameter_assignments
    position = position -
        Vec2D.fromValues(
          artboard.width * artboard.originX,
          artboard.height * artboard.originY,
        );
  }
  const hitRadius = 2;
  var hitArea = IAABB(
    (position.x - hitRadius).round(),
    (position.y - hitRadius).round(),
    (position.x + hitRadius).round(),
    (position.y + hitRadius).round(),
  );

  for (final hitShape in hitShapes) {
    var shape = hitShape.shape;
    var bounds = shape.worldBounds;

    // Quick reject
    bool isOver = false;
    if (bounds.contains(position)) {
      // Make hit tester.
      var hitTester = TransformingHitTester(hitArea);
      shape.fillHitTester(hitTester);

      isOver = hitTester.test();
      if (isOver) {
        return true; // exit early
      }
    }
  }

  for (final nestedArtboard in hitNestedArtboards) {
    if (nestedArtboard.isCollapsed) {
      continue;
    }
    var nestedPosition = nestedArtboard.worldToLocal(position);
    if (nestedPosition == null) {
      // Mounted artboard isn't ready or has a 0 scale transform.
      continue;
    }
    for (final nestedStateMachine
        in nestedArtboard.animations.whereType<NestedStateMachine>()) {
      if (nestedStateMachine.hitTest(nestedPosition)) {
        return true; // exit early
      }
    }
  }

  return false; // no hit targets found
}