| /******************************************************************************* |
| * Copyright (c) 2006 The Pampered Chef, Inc. and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * The Pampered Chef, Inc. - initial API and implementation |
| * Brad Reynolds - bug 116920 |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.examples.databinding.snippets; |
| |
| import java.beans.PropertyChangeListener; |
| import java.beans.PropertyChangeSupport; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| |
| import org.eclipse.core.databinding.DataBindingContext; |
| import org.eclipse.core.databinding.beans.BeansObservables; |
| import org.eclipse.core.databinding.observable.Observables; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.map.IObservableMap; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.jface.databinding.swt.SWTObservables; |
| import org.eclipse.jface.databinding.viewers.ObservableMapLabelProvider; |
| import org.eclipse.jface.databinding.viewers.ViewersObservables; |
| import org.eclipse.jface.layout.GridLayoutFactory; |
| import org.eclipse.jface.viewers.ArrayContentProvider; |
| import org.eclipse.jface.viewers.ComboViewer; |
| import org.eclipse.jface.viewers.ListViewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Combo; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.List; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Text; |
| |
| /** |
| * Demonstrates nested selection.<br> |
| * At the first level, user may select a person.<br> |
| * At the second level, user may select a city to associate with the selected<br> |
| * person or edit the person's name. |
| */ |
| public class Snippet001NestedSelectionWithCombo { |
| public static void main(String[] args) { |
| ViewModel viewModel = new ViewModel(); |
| Shell shell = new View(viewModel).createShell(); |
| |
| // The SWT event loop |
| Display display = Display.getCurrent(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| } |
| |
| // Minimal JavaBeans support |
| public static abstract class AbstractModelObject { |
| private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport( |
| this); |
| |
| public void addPropertyChangeListener(PropertyChangeListener listener) { |
| propertyChangeSupport.addPropertyChangeListener(listener); |
| } |
| |
| public void addPropertyChangeListener(String propertyName, |
| PropertyChangeListener listener) { |
| propertyChangeSupport.addPropertyChangeListener(propertyName, |
| listener); |
| } |
| |
| public void removePropertyChangeListener(PropertyChangeListener listener) { |
| propertyChangeSupport.removePropertyChangeListener(listener); |
| } |
| |
| public void removePropertyChangeListener(String propertyName, |
| PropertyChangeListener listener) { |
| propertyChangeSupport.removePropertyChangeListener(propertyName, |
| listener); |
| } |
| |
| protected void firePropertyChange(String propertyName, Object oldValue, |
| Object newValue) { |
| propertyChangeSupport.firePropertyChange(propertyName, oldValue, |
| newValue); |
| } |
| } |
| |
| // The data model class. This is normally a persistent class of some sort. |
| // |
| // This example implements full JavaBeans bound properties so that changes |
| // to instances of this class will automatically be propogated to the UI. |
| public static class Person extends AbstractModelObject { |
| // Constructor |
| public Person(String name, String city) { |
| this.name = name; |
| this.city = city; |
| } |
| |
| // Some JavaBean bound properties... |
| String name; |
| |
| String city; |
| |
| public String getName() { |
| return name; |
| } |
| |
| public void setName(String name) { |
| String oldValue = this.name; |
| this.name = name; |
| firePropertyChange("name", oldValue, name); |
| } |
| |
| public String getCity() { |
| return city; |
| } |
| |
| public void setCity(String city) { |
| String oldValue = this.city; |
| this.city = city; |
| firePropertyChange("city", oldValue, city); |
| } |
| } |
| |
| // The View's model--the root of our GUI's Model graph |
| // |
| // Typically each View class has a corresponding ViewModel class. |
| // The ViewModel is responsible for getting the objects to edit from the |
| // DAO. Since this snippet doesn't have any persistent objects to |
| // retrieve, this ViewModel just instantiates some objects to edit. |
| // |
| // This ViewModel also implements JavaBean bound properties. |
| static class ViewModel extends AbstractModelObject { |
| // The model to bind |
| private ArrayList people = new ArrayList(); |
| { |
| people.add(new Person("Wile E. Coyote", "Tucson")); |
| people.add(new Person("Road Runner", "Lost Horse")); |
| people.add(new Person("Bugs Bunny", "Forrest")); |
| } |
| |
| // Choice of cities for the Combo |
| private ArrayList cities = new ArrayList(); |
| { |
| cities.add("Tucson"); |
| cities.add("AcmeTown"); |
| cities.add("Lost Horse"); |
| cities.add("Forrest"); |
| cities.add("Lost Mine"); |
| } |
| |
| public ArrayList getPeople() { |
| return people; |
| } |
| |
| public ArrayList getCities() { |
| return cities; |
| } |
| } |
| |
| // The GUI view |
| static class View { |
| private ViewModel viewModel; |
| |
| public View(ViewModel viewModel) { |
| this.viewModel = viewModel; |
| } |
| |
| public Shell createShell() { |
| // Build a UI |
| Shell shell = new Shell(Display.getCurrent()); |
| Realm realm = SWTObservables.getRealm(shell.getDisplay()); |
| |
| List peopleList = new List(shell, SWT.BORDER); |
| Text name = new Text(shell, SWT.BORDER); |
| Combo city = new Combo(shell, SWT.BORDER | SWT.READ_ONLY); |
| |
| ListViewer peopleListViewer = new ListViewer(peopleList); |
| IObservableMap attributeMap = BeansObservables.observeMap( |
| Observables.staticObservableSet(realm, new HashSet( |
| viewModel.getPeople())), Person.class, "name"); |
| peopleListViewer.setLabelProvider(new ObservableMapLabelProvider( |
| attributeMap)); |
| peopleListViewer.setContentProvider(new ArrayContentProvider()); |
| peopleListViewer.setInput(viewModel.getPeople()); |
| |
| DataBindingContext dbc = new DataBindingContext(realm); |
| IObservableValue selectedPerson = ViewersObservables |
| .observeSingleSelection(peopleListViewer); |
| dbc.bindValue(SWTObservables.observeText(name, SWT.Modify), |
| BeansObservables.observeDetailValue(realm, selectedPerson, |
| "name", String.class), null, null); |
| |
| ComboViewer cityViewer = new ComboViewer(city); |
| cityViewer.setContentProvider(new ArrayContentProvider()); |
| cityViewer.setInput(viewModel.getCities()); |
| |
| IObservableValue citySelection = ViewersObservables |
| .observeSingleSelection(cityViewer); |
| dbc.bindValue(citySelection, BeansObservables.observeDetailValue( |
| realm, selectedPerson, "city", String.class), null, null); |
| |
| GridLayoutFactory.swtDefaults().applyTo(shell); |
| // Open and return the Shell |
| shell.pack(); |
| shell.open(); |
| return shell; |
| } |
| } |
| |
| } |