/*******************************************************************************
 * Copyright (c) 2006-2007 Nicolas Richeton.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors :
 *    Nicolas Richeton (nicolas.richeton@gmail.com) - initial implementation
 *******************************************************************************/
package org.eclipse.nebula.snippets.gallery;

import org.eclipse.nebula.widgets.gallery.DefaultGalleryGroupRenderer;
import org.eclipse.nebula.widgets.gallery.DefaultGalleryItemRenderer;
import org.eclipse.nebula.widgets.gallery.Gallery;
import org.eclipse.nebula.widgets.gallery.GalleryItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

/**
 * <p>
 * NOTE: THIS WIDGET AND ITS API ARE STILL UNDER DEVELOPMENT. THIS IS A
 * PRE-RELEASE ALPHA VERSION. USERS SHOULD EXPECT API CHANGES IN FUTURE
 * VERSIONS.
 * </p>
 * 
 * @author Nicolas Richeton (nicolas.richeton@gmail.com)
 */

public class SnippetVirtual {

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		final Gallery gallery = new Gallery(shell, SWT.V_SCROLL | SWT.VIRTUAL);
		
		// Renderers
		DefaultGalleryGroupRenderer gr = new DefaultGalleryGroupRenderer();
		gr.setItemSize(64, 64);
		gr.setMinMargin(3);
		DefaultGalleryItemRenderer ir = new DefaultGalleryItemRenderer();

		gallery.setGroupRenderer(gr);
		gallery.setItemRenderer(ir);
		
		gallery.setVirtualGroups(true);

		gallery.addListener(SWT.SetData, new Listener() {

			public void handleEvent(Event event) {
				GalleryItem item = (GalleryItem) event.item;
				int index;
				if (item.getParentItem() != null) {
					index = item.getParentItem().indexOf(item);
					item.setItemCount(0);
				} else {
					index = gallery.indexOf(item);
					item.setItemCount(100);
				}

				System.out.println( "setData index " + index); //$NON-NLS-1$
				// Your image here
				// item.setImage(eclipseImage);
				item.setText("Item " + index); //$NON-NLS-1$
			}

		});

		gallery.setItemCount(100);
		shell.pack();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

}