TreeViewItem.from constructor

TreeViewItem.from(TreeViewItem source)

Deep copy constructor that can be used to copy an item and all of its child items. Useful if you want to have multiple trees with the same items, but with different UX states (e.g., selection, visibility, etc.).

Implementation

factory TreeViewItem.from(TreeViewItem source) {
  final newItem = TreeViewItem(
    key: source.key,
    leading: source.leading,
    content: source.content,
    value: source.value,
    children: source.children.map(TreeViewItem.from).toList(),
    collapsable: source.collapsable,
    expanded: source.expanded,
    selected: source.selected,
    onInvoked: source.onInvoked,
    onExpandToggle: source.onExpandToggle,
    backgroundColor: source.backgroundColor,
    autofocus: source.autofocus,
    focusNode: source.focusNode,
    semanticLabel: source.semanticLabel,
    loadingWidget: source.loadingWidget,
    lazy: source.lazy,
  );
  for (final c in newItem.children) {
    c._parent = newItem;
  }
  return newItem;
}