onFocus method

Implementation

void onFocus(Event event) async
{
  // set focus
  if (event.parameters != null)
  {
    // key of model that opened the focsed tab
    String? key = event.parameters!.containsKey('key') ? event.parameters!['key'] : null;

    // node needs to be focused in the treeview?
    if (key != null)
    {
      // find node in model tree children
      TreeNodeModel? node = model.findDescendantOfExactType(TreeNodeModel, id: key);

      // found? set focus
      if (node != null)
      {
        event.handled = true;
        focusTreeNode(node);
      }
    }
  }

  // set empty focus if event wasnt handled
  if (!event.handled) focusTreeNode(null);
}