/**
 * Copyright (C) 2001-2017 by RapidMiner and the contributors
 * 
 * Complete list of developers available at our web site:
 * 
 * http://rapidminer.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.graphs;

import javax.swing.DefaultListModel;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import com.rapidminer.ObjectVisualizer;
import com.rapidminer.gui.tools.ExtendedJScrollPane;
import com.rapidminer.operator.clustering.HierarchicalClusterNode;
import com.rapidminer.tools.ObjectVisualizerService;


/**
 * The graph object viewer for cluster nodes in a cluster model.
 *
 * @author Ingo Mierswa
 */
public class ClusterModelObjectViewer implements GraphObjectViewer, ListSelectionListener {

	private DefaultListModel<Object> model = new DefaultListModel<>();

	private JList<Object> listComponent = new JList<>(this.model);

	private Object clusterModel;

	public ClusterModelObjectViewer(Object clusterModel) {
		this.clusterModel = clusterModel;
	}

	@Override
	public JComponent getViewerComponent() {
		listComponent.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		listComponent.addListSelectionListener(this);
		listComponent.setVisibleRowCount(-1);
		return new ExtendedJScrollPane(listComponent);
	}

	@Override
	public void showObject(Object object) {
		this.model.removeAllElements();
		if (object != null) {
			HierarchicalClusterNode node = (HierarchicalClusterNode) object;
			for (Object id : node.getExampleIdsInSubtree()) {
				this.model.addElement(id);
			}
		}
	}

	@Override
	public void valueChanged(ListSelectionEvent e) {
		if (!e.getValueIsAdjusting()) {
			Object id = listComponent.getSelectedValue();
			if (id != null) {
				ObjectVisualizer visualizer = ObjectVisualizerService.getVisualizerForObject(clusterModel);
				visualizer.startVisualization(id);
			}
		}
	}
}