deserialize method

Implementation

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

  // set properties
  value = Xml.get(node: xml, tag: 'value');
  matchtype = Xml.get(node: xml, tag: 'matchtype') ?? Xml.get(node: xml, tag: 'searchtype');

  //check to see if value has been specified so the form does not fill it out.
  hasDefaulted = (Xml.get(node: xml, tag: 'value') == null);

  String? empty = Xml.get(node: xml, tag: 'addempty');
  if (S.isBool(empty)) addempty = S.toBool(empty);

  // clear options
  for (var option in this.options) {
    option.dispose();
  }
  this.options.clear();

  // Build options
  List<OptionModel> options = findChildrenOfExactType(OptionModel).cast<OptionModel>();

  // set prototype
  if ((!S.isNullOrEmpty(datasource)) && (options.isNotEmpty))
  {
    prototype = WidgetModel.prototypeOf(options[0].element);
    options.removeAt(0);
  }

  // build options
  for (var option in options) {
    this.options.add(option);
  }

  // Set selected option
  setData();
}