public class LinkedComboBoxSample implements EntryPoint {
public void onModuleLoad() {
Panel panel = new Panel();
panel.setBorder(false);
panel.setPaddings(15);
FormPanel form = new FormPanel();
form.setTitle("Linked ComboBox");
form.setFrame(true);
form.setWidth(350);
// countries store
Object[][] countries = new Object[][]{
new Object[]{"USA", "United States of America"},
new Object[]{"D", "Germany"},
new Object[]{"F", "France"},
new Object[]{"GB", "Great Britain"},
};
final Store countriesStore = new SimpleStore(new String[]{"cid", "country"}, countries);
countriesStore.load();
//cities store
Object[][] cities = new Object[][]{
new Object[]{new Integer(1), "USA", "New York"},
new Object[]{new Integer(2), "USA", "Cleveland"},
new Object[]{new Integer(3), "USA", "Austin"},
new Object[]{new Integer(4), "USA", "Los Angeles"},
new Object[]{new Integer(5), "D", "Munich"},
new Object[]{new Integer(6), "D", "Bonn"},
new Object[]{new Integer(7), "F", "Paris"},
new Object[]{new Integer(8), "F", "Nice"},
new Object[]{new Integer(9), "GB", "London"},
new Object[]{new Integer(10), "GB", "Glasgow"},
new Object[]{new Integer(11), "GB", "Liverpool"}
};
final Store citiesStore = new SimpleStore(new String[]{"id", "cid", "city"}, cities);
citiesStore.load();
final ComboBox countryCB = new ComboBox();
countryCB.setFieldLabel("Select Country");
countryCB.setStore(countriesStore);
countryCB.setDisplayField("country");
countryCB.setMode(ComboBox.LOCAL);
countryCB.setTriggerAction(ComboBox.ALL);
countryCB.setForceSelection(true);
countryCB.setValueField("cid");
countryCB.setReadOnly(true);
final ComboBox cityCB = new ComboBox();
cityCB.setFieldLabel("Select City");
cityCB.setStore(citiesStore);
cityCB.setDisplayField("city");
cityCB.setValueField("id");
cityCB.setMode(ComboBox.LOCAL);
cityCB.setTriggerAction(ComboBox.ALL);
cityCB.setLinked(true);
cityCB.setForceSelection(true);
cityCB.setReadOnly(true);
countryCB.addListener(new ComboBoxListenerAdapter() {
public void onSelect(ComboBox comboBox, Record record, int index) {
cityCB.setValue("");
citiesStore.filter("cid", comboBox.getValue());
}
});
form.add(countryCB);
form.add(cityCB);
panel.add(form); &n |