wrapChildren method

List<Widget> wrapChildren(BuildContext context, List<NavigationBarItem> children)

Wraps navigation bar items with control data for selection tracking.

Takes a list of NavigationBarItem children and wraps each with NavigationChildControlData that tracks the item's index and selection state. Only selectable items receive a selection index, while non-selectable items have a null selection index.

Parameters:

• context (BuildContext, required): Build context for inherited data.
• children (List<NavigationBarItem>, required): Navigation items to wrap.

Returns: List<Widget> — wrapped navigation items with control data.

Example:

final wrappedItems = wrapChildren(
  context,
  [
    NavigationBarItem(icon: Icon(Icons.home), selectable: true),
    NavigationBarItem(icon: Icon(Icons.settings), selectable: true),
  ],
);

Implementation

List<Widget> wrapChildren(
  BuildContext context,
  List<NavigationBarItem> children,
) {
  int index = 0;
  List<Widget> newChildren = List.of(children);
  for (var i = 0; i < children.length; i++) {
    if (children[i].selectable) {
      newChildren[i] = Data.inherit(
        data: NavigationChildControlData(index: index, actualIndex: i),
        child: children[i],
      );
      index++;
    } else {
      newChildren[i] = Data.inherit(
        data: NavigationChildControlData(index: null, actualIndex: i),
        child: children[i],
      );
    }
  }
  return newChildren;
}