001    /*
002     * Copyright (C) 2008-2010 by Holger Arndt
003     *
004     * This file is part of the Universal Java Matrix Package (UJMP).
005     * See the NOTICE file distributed with this work for additional
006     * information regarding copyright ownership and licensing.
007     *
008     * UJMP is free software; you can redistribute it and/or modify
009     * it under the terms of the GNU Lesser General Public License as
010     * published by the Free Software Foundation; either version 2
011     * of the License, or (at your option) any later version.
012     *
013     * UJMP is distributed in the hope that it will be useful,
014     * but WITHOUT ANY WARRANTY; without even the implied warranty of
015     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
016     * GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public
019     * License along with UJMP; if not, write to the
020     * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
021     * Boston, MA  02110-1301  USA
022     */
023    
024    package org.ujmp.jmathplot;
025    
026    import java.awt.event.ComponentEvent;
027    import java.awt.event.ComponentListener;
028    
029    import javax.swing.JPanel;
030    
031    import org.ujmp.core.Matrix;
032    import org.ujmp.gui.interfaces.CanBeRepainted;
033    import org.ujmp.gui.util.GraphicsExecutor;
034    
035    public abstract class AbstractJMathPlotPanel extends JPanel implements
036                    ComponentListener, CanBeRepainted {
037            private static final long serialVersionUID = 2083997325942788081L;
038    
039            private Matrix matrix = null;
040    
041            private JPanel panel = null;
042    
043            public Matrix getMatrix() {
044                    return matrix;
045            }
046    
047            public AbstractJMathPlotPanel(Matrix matrix) {
048                    this.matrix = matrix;
049                    addComponentListener(this);
050            }
051    
052            public void changeState() {
053                    if (panel == null && isShowing()) {
054                            GraphicsExecutor.scheduleUpdate(this);
055                    } else if (panel != null && !isShowing()) {
056                            destroy();
057                    }
058            }
059    
060            public void destroy() {
061                    remove(panel);
062                    panel = null;
063            }
064    
065            
066            public void componentHidden(ComponentEvent e) {
067                    changeState();
068            }
069    
070            
071            public void componentMoved(ComponentEvent e) {
072                    changeState();
073            }
074    
075            
076            public void componentResized(ComponentEvent e) {
077                    changeState();
078            }
079    
080            
081            public void componentShown(ComponentEvent e) {
082                    changeState();
083            }
084    
085            public void setPanel(JPanel panel) {
086                    this.panel = panel;
087            }
088    
089    }