| /******************************************************************************* |
| * Copyright (c) 2008 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.examples.databinding.snippets; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.list.ComputedList; |
| import org.eclipse.core.databinding.observable.list.IObservableList; |
| import org.eclipse.core.databinding.observable.list.WritableList; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.jface.databinding.swt.SWTObservables; |
| import org.eclipse.jface.databinding.viewers.ObservableListContentProvider; |
| import org.eclipse.jface.layout.GridDataFactory; |
| import org.eclipse.jface.layout.GridLayoutFactory; |
| import org.eclipse.jface.viewers.ComboViewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Combo; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Group; |
| import org.eclipse.swt.widgets.Shell; |
| |
| /** |
| * @since 3.2 |
| * |
| */ |
| public class Snippet022ComputedListCombo { |
| private static WritableList model; |
| |
| public static void main(String[] args) { |
| Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setLayout(new GridLayout(1, false)); |
| |
| Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() { |
| public void run() { |
| Snippet022ComputedListCombo snippet = new Snippet022ComputedListCombo(); |
| snippet.createModel(); |
| snippet.createControls(shell); |
| } |
| }); |
| |
| shell.pack(); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| display.dispose(); |
| } |
| |
| /** |
| * |
| */ |
| protected void createModel() { |
| model = new WritableList(); |
| model.add(new Thing("Alice", true, false)); |
| model.add(new Thing("Beth", true, false)); |
| model.add(new Thing("Cathy", true, false)); |
| model.add(new Thing("Arthur", false, true)); |
| model.add(new Thing("Bob", false, true)); |
| model.add(new Thing("Curtis", false, true)); |
| model.add(new Thing("Snail", true, true)); |
| model.add(new Thing("Nail", false, false)); |
| } |
| |
| /** |
| * @param shell |
| */ |
| protected void createControls(Shell shell) { |
| Composite composite = new Composite(shell, SWT.NONE); |
| Group group = new Group(composite, SWT.NONE); |
| group.setText("Filter"); |
| Button male = new Button(group, SWT.CHECK); |
| male.setText("Male"); |
| Button female = new Button(group, SWT.CHECK); |
| female.setText("Female"); |
| final IObservableValue femaleObservable = SWTObservables |
| .observeSelection(female); |
| final IObservableValue maleObservable = SWTObservables |
| .observeSelection(male); |
| Combo combo = new Combo(composite, SWT.DROP_DOWN | SWT.READ_ONLY); |
| GridDataFactory.defaultsFor(combo).align(SWT.BEGINNING, SWT.BEGINNING) |
| .applyTo(combo); |
| ComboViewer viewer = new ComboViewer(combo); |
| viewer.setContentProvider(new ObservableListContentProvider()); |
| // We should really have an out-of-the box filtered list... |
| IObservableList filteredList = new ComputedList() { |
| protected List calculate() { |
| ArrayList result = new ArrayList(); |
| for (Iterator it = model.iterator(); it.hasNext();) { |
| Thing thing = (Thing) it.next(); |
| if (((Boolean) femaleObservable.getValue()).booleanValue() |
| && !thing.female) |
| continue; |
| if (((Boolean) maleObservable.getValue()).booleanValue() |
| && !thing.male) |
| continue; |
| result.add(thing); |
| } |
| return result; |
| } |
| }; |
| viewer.setInput(filteredList); |
| GridLayoutFactory.swtDefaults().applyTo(group); |
| GridLayoutFactory.swtDefaults().applyTo(composite); |
| } |
| |
| static class Thing { |
| String name; |
| boolean male; |
| boolean female; |
| |
| public Thing(String name, boolean female, boolean male) { |
| this.name = name; |
| this.female = female; |
| this.male = male; |
| } |
| |
| public String toString() { |
| return name; |
| } |
| } |
| } |