execute method

@override Future<bool?> execute(String caller, String propertyOrFunction, List arguments)

Implementation

@override
Future<bool?> execute(
    String caller, String propertyOrFunction, List<dynamic> arguments) async {
  /// setter
  if (scope == null) return null;
  var function = propertyOrFunction.toLowerCase().trim();

  switch (function) {
  // export the data
    case "export":
      await export();
      return true;

  // selects the item by index
    case "select":
      int index = toInt(elementAt(arguments, 0)) ?? -1;
      if (index >= 0 && index < items.length) {
        var model = items[index];
        if (model != null && !model.selected) onTap(model);
      }
      return true;

  // sort the grid
    case "sort":
      var field = elementAt(arguments, 0);
      var type  = elementAt(arguments, 1) ?? 'string';
      var ascending = toBool(elementAt(arguments, 2)) ?? true;
      _sort(field, type, ascending);
      return true;

  // scroll +/- pixels
    case "scroll":
      scroll(toDouble(elementAt(arguments, 0)), animate: toBool(elementAt(arguments, 1)) ?? true);
      return true;

  // scroll to item by id
    case "scrollto":
      scrollTo(toStr(elementAt(arguments, 0)), toStr(elementAt(arguments, 1)), animate: toBool(elementAt(arguments, 2)) ?? true);
      return true;

  // de-selects the item by index
    case "deselect":
      int index = toInt(elementAt(arguments, 0)) ?? -1;
      if (index >= 0 && data != null && index < data.length) {
        var model = items[index];
        if (model != null && model.selected == true) onTap(model);
      }
      return true;

  // de-selects the item by index
    case "clear":
      onTap(null);
      return true;
  }

  return super.execute(caller, propertyOrFunction, arguments);
}