SettingsPanel.java 文件源码

private Widget createLayoutListBox()
{
    final GroupedListBox box = new GroupedListBox();
    for (WCLayoutAlgo algo : WCLayoutAlgoRegistry.list())
        box.addItem(algo.getType() + " | " + algo.getDescription(), algo.getId());

    box.setSelectedIndex(findIndex(box, setting.getLayoutAlgorithm().getId()));

    box.addChangeHandler(new ChangeHandler()
    {
        public void onChange(ChangeEvent event)
        {
            WCLayoutAlgo value = WCLayoutAlgoRegistry.getById(box.getValue(box.getSelectedIndex()));
            setting.setLayoutAlgorithm(value);
        }
    });

    box.setTitle("Layout method for the word cloud");
    return box;
}