SettingsPanel.java 文件源码

private ListBox createNumberListBox()
{
    final ListBox box = new ListBox();
    List<String> values = Arrays.asList("10", "20", "30", "40", "50", "75", "100", "125", "150", "200", "250", "300");

    for (int i = 0; i < values.size(); i++)
        box.addItem(values.get(i));

    box.setSelectedIndex(findIndex(box, String.valueOf(setting.getWordCount())));

    box.addChangeHandler(new ChangeHandler()
    {
        public void onChange(ChangeEvent event)
        {
            int value = Integer.parseInt(box.getValue(box.getSelectedIndex()));
            setting.setWordCount(value);
        }
    });

    box.setTitle("Number of words to include in the word cloud");

    return box;
}