DualListSnippet.java

/*******************************************************************************
 * Copyright (c) 2011 Laurent CARON.
 * 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:
 *     Laurent CARON (laurent.caron at gmail dot com) - initial API and implementation
 *******************************************************************************/
package org.mihalis.opal.itemSelector;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.mihalis.opal.itemSelector.DLItem.LAST_ACTION;

/**
 * A simple snipper for the ItemSelector Widget
 * 
 */
public class DualListSnippet {

	public static void main(final String[] args) {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setText("Dual List Snippet");
		shell.setSize(600, 600);
		shell.setLayout(new GridLayout(1, false));

		final DualList dl = new DualList(shell, SWT.NONE);
		dl.setItems(createItems(shell));

		dl.addSelectionChangeListener(new SelectionChangeListener() {

			@Override
			public void widgetSelected(final SelectionChangeEvent e) {
				System.out.println("Selection Change Listener called");
				for (final DLItem item : e.getItems()) {
					final StringBuilder sb = new StringBuilder();
					if (item.getLastAction() == LAST_ACTION.SELECTION) {
						sb.append("[SELECTION] ");
					} else {
						sb.append("[DE-SELECTION] ");
					}
					sb.append(item.getText());
					System.out.println(sb.toString());
				}
			}
		});

		dl.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));

		shell.pack();
		shell.open();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
		display.dispose();

	}

	private static List<DLItem> createItems(final Shell shell) {
		final List<DLItem> list = new ArrayList<DLItem>();

		String defaultFontName = null;
		int defaultHeight = -1;
		for (final FontData fontData : shell.getFont().getFontData()) {
			if (defaultFontName == null) {
				defaultFontName = fontData.getName();
			}
			if (defaultHeight == -1) {
				defaultHeight = fontData.getHeight();
			}
		}

		final Font font = new Font(shell.getDisplay(), defaultFontName, defaultHeight, SWT.BOLD);

		list.add(new DLItem("Austria", createImage(shell, "austria")));
		list.add(new DLItem("Belgium", createImage(shell, "belgium")));
		list.add(new DLItem("Bulgaria", createImage(shell, "bulgaria")));
		list.add(new DLItem("Cyprus", createImage(shell, "cyprus")));
		list.add(new DLItem("Czech Republic", createImage(shell, "czech")));
		list.add(new DLItem("Denmark", createImage(shell, "denmark")));
		list.add(new DLItem("Estonia", createImage(shell, "estonia")));
		list.add(new DLItem("Finland", createImage(shell, "finland")));
		list.add(new DLItem("France", createImage(shell, "france"), font));
		list.add(new DLItem("Germany", createImage(shell, "germany")));
		list.add(new DLItem("Greece", createImage(shell, "greece")));
		list.add(new DLItem("Hungary", createImage(shell, "hungary")));
		list.add(new DLItem("Ireland", createImage(shell, "ireland")));
		list.add(new DLItem("Italy", createImage(shell, "italy")));
		list.add(new DLItem("Latvia", createImage(shell, "latvia")));
		list.add(new DLItem("Lithuania", createImage(shell, "lithuania")));
		list.add(new DLItem("Luxembourg", createImage(shell, "luxembourg")));
		list.add(new DLItem("Malta", createImage(shell, "malta")));
		list.add(new DLItem("Netherlands", createImage(shell, "netherlands")));
		list.add(new DLItem("Poland", createImage(shell, "poland"), shell.getDisplay().getSystemColor(SWT.COLOR_WHITE), shell.getDisplay().getSystemColor(SWT.COLOR_RED)));
		list.add(new DLItem("Portugal", createImage(shell, "portugal")));
		list.add(new DLItem("Romania", createImage(shell, "romania")));
		list.add(new DLItem("Slovakia", createImage(shell, "slovakia")));
		list.add(new DLItem("Slovenia", createImage(shell, "slovenia")));
		list.add(new DLItem("Spain", createImage(shell, "spain")));
		list.add(new DLItem("Sweden", createImage(shell, "sweden")));
		list.add(new DLItem("United Kingdom", createImage(shell, "unitedkingdom")));

		shell.addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(final DisposeEvent e) {
				font.dispose();
			}
		});

		return list;
	}

	private static Image createImage(final Shell shell, final String fileName) {
		final Image image = new Image(shell.getDisplay(), DualListSnippet.class.getClassLoader().getResourceAsStream("org/mihalis/opal/itemSelector/flags/" + fileName + ".png"));
		shell.addDisposeListener(new DisposeListener() {

			@Override
			public void widgetDisposed(final DisposeEvent de) {
				image.dispose();
			}
		});
		return image;
	}
}