scaleArea method

@protected void scaleArea(Iterable<TreeNode<Object>> children, num scaleFactor)

Scales the area of each renderer element in children by a scaleFactor.

scaleFactor should be calculated based on the available layout area and the measure which the available layout area represents.

Implementation

@protected
void scaleArea(Iterable<TreeNode<Object>> children, num scaleFactor) {
  for (final child in children) {
    final element = _getRendererElement(child);
    final area = element.measure * (scaleFactor < 0 ? 0 : scaleFactor);
    element.area = area <= 0 ? 0 : area;
  }
}