selectAllVisible method

void selectAllVisible()

Select every selectable, currently-visible node (multi mode).

Implementation

void selectAllVisible() {
  if (selectionMode != TreeSelectionMode.multi) return;
  _selection
    ..clear()
    ..addAll(visibleRows().where((r) => r.node.selectable).map((r) => r.node.id));
  notifyListeners();
}