MultiValueListBox.java 文件源码

/**
 * Instantiates a new MultiValueListBox.
 */
public MultiValueListBox(Renderer<T> renderer, ProvidesKey<T> keyProvider) {
  this.keyProvider = keyProvider;
  this.renderer = renderer;
  ListBox listBox = new ListBox();
  listBox.setMultipleSelect(true);
  initWidget(listBox);
  getListBox().addChangeHandler(new ChangeHandler() {
    public void onChange(ChangeEvent event) {
      List<T> newValue = new ArrayList<>();
      for (int i = 0; i < values.size(); i++) {
        if (getListBox().isItemSelected(i)) {
          newValue.add(values.get(i));
        }
      }
      setValue(newValue, true);
    }
  });
}