onKey method

@override bool onKey(KeyEvent event, RenderContext ctx)

Implementation

@override
bool onKey(KeyEvent event, RenderContext ctx) {
  if (items.isEmpty) return false;
  state.activeIndex = state.activeIndex.clamp(0, items.length - 1);

  if (event.key == NamedKey.arrowUp || event.char == 'k') {
    state.activeIndex = (state.activeIndex - 1).clamp(0, items.length - 1);
    return true;
  }
  if (event.key == NamedKey.arrowDown || event.char == 'j') {
    state.activeIndex = (state.activeIndex + 1).clamp(0, items.length - 1);
    return true;
  }
  if (event.key == NamedKey.home) {
    state.activeIndex = 0;
    return true;
  }
  if (event.key == NamedKey.end) {
    state.activeIndex = items.length - 1;
    return true;
  }
  if (event.char == ' ') {
    final item = items[state.activeIndex];
    if (state.checked.contains(item)) {
      state.checked.remove(item);
    } else {
      state.checked.add(item);
    }
    onChanged?.call(state.checked.toList(growable: false));
    return true;
  }
  return false;
}