getBounds method

@override GRect? getBounds(GDisplayObject? targetSpace, [ GRect? out ])

Returns the bounds of this container in the given targetSpace.

If out is provided, the results will be stored there. Otherwise, a new GRect will be created and returned.

Implementation

@override
GRect? getBounds(GDisplayObject? targetSpace, [GRect? out]) {
  out ??= GRect();
  final len = children.length;
  if (len == 0) {
    getTransformationMatrix(targetSpace, $sBoundsMatrix);
    $sBoundsMatrix.transformCoords(0, 0, $sBoundsPoint);
    out.setTo($sBoundsPoint.x, $sBoundsPoint.y, 0, 0);
    return out;
  } else if (len == 1) {
    return children[0].getBounds(targetSpace, out);
  } else {
    var minX = 10000000.0;
    var maxX = -10000000.0;
    var minY = 10000000.0;
    var maxY = -10000000.0;
    final len = numChildren;
    for (var i = 0; i < len; ++i) {
      children[i].getBounds(targetSpace, out);
      if (out.isEmpty) continue;
      if (minX > out.x) minX = out.x;
      if (maxX < out.right) maxX = out.right;
      if (minY > out.y) minY = out.y;
      if (maxY < out.bottom) maxY = out.bottom;
    }
    out.setTo(minX, minY, maxX - minX, maxY - minY);
    return out;
  }
}