LinkButton.java example

Explorer
rapidminer-vega-master
/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.tools.components;

import java.awt.event.ActionEvent;
import java.net.URL;

import javax.swing.Action;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkEvent.EventType;
import javax.swing.event.HyperlinkListener;

import com.rapidminer.gui.tools.ExtendedHTMLJEditorPane;
import com.rapidminer.gui.tools.ResourceAction;
import com.rapidminer.tools.Tools;

/** Can be used as a label that triggers an action event on every link activation click. 
 *  The {@link Action#NAME} property of the action will be the label text. Note that
 *  it must contain a <a>> tag for this class to do something useful. The
 *  icon property of the action is not interpreted. 
 * 
 * @author Simon Fischer
 *
 */
public class LinkButton extends ExtendedHTMLJEditorPane {
	
	private static final long serialVersionUID = 1L;

	public LinkButton(final Action action) {
		this(action, false);
	}
	
	public LinkButton(final Action action, boolean addLinkTag) {
		super("text/html", makeHTML(action, addLinkTag));
		setToolTipText((String) action.getValue(Action.SHORT_DESCRIPTION));
		installDefaultStylesheet();
		setEditable(false);
		setOpaque(false);
		addHyperlinkListener(new HyperlinkListener() {
			@Override
			public void hyperlinkUpdate(HyperlinkEvent e) {
				if (e.getEventType() == EventType.ACTIVATED) {
					action.actionPerformed(new ActionEvent(LinkButton.this, ActionEvent.ACTION_PERFORMED,
							e.getDescription()));
							//(String)action.getValue(Action.ACTION_COMMAND_KEY)));
				}
			}
		});		
	}

	private static String makeHTML(final Action action, boolean addLinkTag) {		
		String html = (String)action.getValue(Action.NAME);
		if (addLinkTag) {
			if (action instanceof ResourceAction) {
				String iconName = ((ResourceAction)action).getIconName();
				if (iconName != null) {
					URL iconUrl = Tools.getResource("icons/16/"+iconName);
					if (iconUrl != null) {
						html = "<img src=\""+iconUrl.toString()+"\" border=\"0\" style=\"border:none;vertical-align:middle;\"/> " + html;
					}
				}
			}
			html = "<a href=\"#\">" + html + "</a>";
		}
		return html;
	}
}