/*******************************************************************************
 * Copyright (c) 2008 Tom Schindl 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:
 *     Tom Schindl - initial API and implementation
 ******************************************************************************/
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.databinding.viewers.ViewersObservables;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

/**
 * Snippet to demonstrate multi-selection support added in 3.4
 */
public class Snippet {
	class Person {
		private PropertyChangeSupport support = new PropertyChangeSupport(this);
		private ArrayList fruits = new ArrayList();

		public Person() {

		}

		public void addPropertyChangeListener(PropertyChangeListener listener) {
			support.addPropertyChangeListener(listener);
		}

		public void removePropertyChangeListener(PropertyChangeListener listener) {
			support.removePropertyChangeListener(listener);
		}

		public ArrayList getFruits() {
			return fruits;
		}

		public void setFruits(ArrayList fruits) {
			this.fruits = fruits;
		}
	}

	class Fruit {
		private String name;

		public Fruit(String name) {
			this.name = name;
		}

		public String toString() {
			return name;
		}

	}

	private Snippet(Shell shell) {
		shell.setLayout(new GridLayout(1, false));

		ArrayList fruits = new ArrayList();
		fruits.add(new Fruit("Mango"));
		fruits.add(new Fruit("Orange"));
		fruits.add(new Fruit("Banana"));
		fruits.add(new Fruit("Grapes"));

		final Person p = new Person();

		ListViewer viewer = new ListViewer(shell, SWT.BORDER | SWT.MULTI);
		viewer.setLabelProvider(new LabelProvider());
		viewer.setContentProvider(new ArrayContentProvider());
		viewer.setInput(fruits);
		viewer.getControl().setLayoutData(new GridData(GridData.FILL_BOTH));

		IObservableList mList = BeansObservables.observeList(
				Realm.getDefault(), p, "fruits");
		IObservableList uList = ViewersObservables
				.observeMultiSelection(viewer);

		DataBindingContext ctx = new DataBindingContext();
		ctx.bindList(uList, mList, null, null);

		Button button = new Button(shell, SWT.PUSH);
		button.setText("Read content");
		button.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		button.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e) {
				System.err.println(p.getFruits());
			}

		});
	}

	public static void main(String[] args) {
		final Display display = new Display();
		Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
			public void run() {
				final Shell shell = new Shell(display);
				new Snippet(shell);
				shell.open();
				while (!shell.isDisposed()) {
					if (!display.readAndDispatch()) {
						display.sleep();
					}
				}
			}
		});
	}
}