itemCount property

int get itemCount

Total number of items.

Implementation

int get itemCount => _itemCount;

set itemCount (int value)

Updates the total item count (e.g., when list changes).

Automatically clamps focus to valid range and adjusts error list size.

Implementation

set itemCount(int value) {
  final newCount = max(0, value);
  if (newCount == _itemCount) return;

  if (newCount > _itemCount) {
    // Grow: add null errors for new items
    _errors.addAll(List<String?>.filled(newCount - _itemCount, null));
  } else {
    // Shrink: remove trailing errors
    _errors.removeRange(newCount, _itemCount);
  }

  _itemCount = newCount;
  if (_itemCount == 0) {
    _focusedIndex = 0;
  } else {
    _focusedIndex = _focusedIndex.clamp(0, _itemCount - 1);
  }
}