deserialize method

Implementation

@override
void deserialize(XmlElement xml) {
  // deserialize
  super.deserialize(xml);

  // properties
  direction = Xml.get(node: xml, tag: 'direction');
  scrollShadows = Xml.get(node: xml, tag: 'scrollshadows');
  onpulldown = Xml.get(node: xml, tag: 'onpulldown');
  allowDrag = Xml.get(node: xml, tag: 'allowDrag');

  // clear items
  items.forEach((_, item) => item.dispose());
  items.clear();

  // build grid items
  _buildItems();
}