ExamplesView.java

/*******************************************************************************
 * Copyright (c) 2006 IBM Corporation, Remain Software 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:
 *    chris.gross@us.ibm.com - initial API and implementation
 *    wim.jongman@remainsoftware.com - bug 368889
 *******************************************************************************/

package org.eclipse.nebula.examples;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.FontRegistry;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.TabFolder;
import org.eclipse.swt.widgets.TabItem;
import org.eclipse.ui.part.ViewPart;
import org.eclipse.ui.plugin.AbstractUIPlugin;

/**
 * Nebula examples view.
 * 
 * @author cgross
 */
public class ExamplesView extends ViewPart {

	private TabFolder tabFolder;
	private static ImageRegistry imgRegistry = new ImageRegistry();
	private static FontRegistry fontRegistry = new FontRegistry();

	public ExamplesView() {
		super();

	}

	public void createPartControl(Composite parent) {

		tabFolder = new TabFolder(parent, SWT.TOP);
		IConfigurationElement[] elements = Platform.getExtensionRegistry()
				.getConfigurationElementsFor(
						"org.eclipse.nebula.examples.examples");
		HashMap elementsMap = new HashMap();

		for (int i = 0; i < elements.length; i++) {
			elementsMap.put(elements[i].getAttribute("name"), elements[i]);
		}

		Map sortedElements = new TreeMap(elementsMap);
		Iterator iter = sortedElements.entrySet().iterator();
		while (iter.hasNext()) {
			IConfigurationElement element = (IConfigurationElement) ((Map.Entry) iter
					.next()).getValue();
			TabItem item = new TabItem(tabFolder, SWT.NONE);
			item.setText(element.getAttribute("name"));

			try {
				final AbstractExampleTab part = (AbstractExampleTab) element
						.createExecutableExtension("class");

				Composite client = new Composite(tabFolder, SWT.NONE);
				part.create(client);

				item.setControl(client);

			} catch (CoreException e) {
				e.printStackTrace();
			}
		}

		// bug 368889
		if (tabFolder.getItems().length > 0)
			tabFolder.setSelection(tabFolder.getItem(0));

	}

	public void setFocus() {
		tabFolder.setFocus();
	}

	/**
	 * Returns an image descriptor for the image file at the given plug-in
	 * relative path.
	 * 
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
		return AbstractUIPlugin.imageDescriptorFromPlugin(
				"org.eclipse.nebula.examples", path);
	}

	/**
	 * Returns an image for the image file at the given plug-in relative path.
	 * This image is maintained in an ImageRegistry and will automatically be
	 * disposed.
	 * 
	 * @param path
	 *            the path
	 * @return the image
	 */
	public static Image getImage(String path) {
		Image i = imgRegistry.get(path);

		if (i == null) {
			ImageDescriptor id = getImageDescriptor(path);
			if (id == null)
				return null;

			i = id.createImage();
			imgRegistry.put(path, i);
		}

		return i;
	}

	/**
	 * Returns a Font for the specified lookup key.
	 * 
	 * @param fontLookupKey
	 * @return
	 */
	public static Font getFont(String fontLookupKey) {
		return fontRegistry.get(fontLookupKey);
	}

	/**
	 * Sets FontData[] for the specified lookup key.
	 * 
	 * @param fontLookupKey
	 * @return
	 */
	public static void setFont(String fontLookupKey, FontData[] fontData) {
		fontRegistry.put(fontLookupKey, fontData);
	}

}