Java SelectElement.add方法代码示例

import com.google.gwt.dom.client.SelectElement; //导入方法依赖的package包/类
/**
 * Inserts an item into the list box, specifying its direction and an initial value for the item. If the index is less than zero, or greater than or equal
 * to the length of the list, then the item will be appended to the end of the list.
 *
 * @param item  the text of the item to be inserted
 * @param dir   the item's direction. If {@code null}, the item is displayed in the widget's overall direction, or, if a direction estimator has been set, in
 *              the item's estimated direction.
 * @param value the item's value, to be submitted if it is part of a {@link FormPanel}.
 * @param index the index at which to insert it
 */
public void insertItem(String item, Direction dir, String value, int index) {
    SelectElement select = getSelectElement();
    OptionElement option = Document.get().createOptionElement();
    setOptionText(option, item, dir);
    option.setValue(value);

    int itemCount = select.getLength();
    if (index < 0 || index > itemCount) {
        index = itemCount;
    }
    if (index == itemCount) {
        select.add(option, null);
    } else {
        OptionElement before = select.getOptions().getItem(index);
        select.add(option, before);
    }
}
 

import com.google.gwt.dom.client.SelectElement; //导入方法依赖的package包/类
@Override
public void insertItem(String item, Direction dir, String value, int index) {
    SelectElement select = getElement().cast();
    OptionElement option = Document.get().createOptionElement();
    setOptionText(option, item, dir);
    option.setValue(value);
    option.setTitle(item);

    int itemCount = select.getLength();
    if (index < 0 || index > itemCount) {
        index = itemCount;
    }
    if (index == itemCount) {
        select.add(option, null);
    } else {
        OptionElement before = select.getOptions().getItem(index);
        select.add(option, before);
    }
}
 

import com.google.gwt.dom.client.SelectElement; //导入方法依赖的package包/类
private OptionElement createChildOption(Document document, SelectElement select, String value, String label) {
	OptionElement option = document.createOptionElement();
	option.setValue(value);
	option.setInnerText(label);

	select.add(option, null);

	return option;
}
 

import com.google.gwt.dom.client.SelectElement; //导入方法依赖的package包/类
private void setupLocaleSelect() {
  final SelectElement select = (SelectElement) Document.get().getElementById(LANG_ELEMENT_ID);
  String currentLocale = LocaleInfo.getCurrentLocale().getLocaleName();
  String[] localeNames = LocaleInfo.getAvailableLocaleNames();
  for (String locale : localeNames) {
    if (!DEFAULT_LOCALE.equals(locale)) {
      String displayName = LocaleInfo.getLocaleNativeDisplayName(locale);
      OptionElement option = Document.get().createOptionElement();
      option.setValue(locale);
      option.setText(displayName);
      select.add(option, null);
      if (locale.equals(currentLocale)) {
        select.setSelectedIndex(select.getLength() - 1);
      }
    }
  }

  EventDispatcherPanel.of(select).registerChangeHandler(null, new WaveChangeHandler() {

    @Override
    public boolean onChange(ChangeEvent event, Element context) {
      UrlBuilder builder = Location.createUrlBuilder().setParameter(
          LOCALE_URLBUILDER_PARAMETER, select.getValue());
      Window.Location.replace(builder.buildString());
      localeService.storeLocale(select.getValue());
      return true;
    }
  });
}
 

import com.google.gwt.dom.client.SelectElement; //导入方法依赖的package包/类
public void addItemWithStyle(String item, String value) {
  final SelectElement select = getElement().cast();
  final OptionElement option = Document.get().createOptionElement();
  option.setText(item);
  option.setValue(value);
  option.setClassName(styleName);

  select.add(option, null);
}
 

import com.google.gwt.dom.client.SelectElement; //导入方法依赖的package包/类
private void setupLocaleSelect() {
  final SelectElement select = (SelectElement) Document.get().getElementById("lang");
  String currentLocale = LocaleInfo.getCurrentLocale().getLocaleName();
  String[] localeNames = LocaleInfo.getAvailableLocaleNames();
  for (String locale : localeNames) {
    if (!DEFAULT_LOCALE.equals(locale)) {
      String displayName = LocaleInfo.getLocaleNativeDisplayName(locale);
      OptionElement option = Document.get().createOptionElement();
      option.setValue(locale);
      option.setText(displayName);
      select.add(option, null);
      if (locale.equals(currentLocale)) {
        select.setSelectedIndex(select.getLength() - 1);
      }
    }
  }
  EventDispatcherPanel.of(select).registerChangeHandler(null, new WaveChangeHandler() {

    @Override
    public boolean onChange(ChangeEvent event, Element context) {
      UrlBuilder builder = Location.createUrlBuilder().setParameter(
              "locale", select.getValue());
      Window.Location.replace(builder.buildString());
      localeService.storeLocale(select.getValue());
      return true;
    }
  });
}