/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2005-2006,
* @author JBoss Inc.
*/
/*
* Copyright (C) 1998, 1999, 2000, 2001, 2002
*
* Arjuna Technologies Ltd.
* Newcastle upon Tyne,
* Tyne and Wear,
* UK.
*
* $Id: GraphPanel.java 2342 2006-03-30 13:06:17Z $
*/
package com.arjuna.ats.tools.perfgraph;
import com.arjuna.ats.tools.perfgraph.graphbean.XYGraphingBean;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.image.BufferedImage;
public class GraphPanel extends JPanel implements Runnable
{
private final static long UPDATE_PERIOD = 5000;
private XYGraphingBean _graphingBean = null;
private BufferedImage _graphImage = null;
private Thread _repainter = null;
private boolean _repaint = true;
private int _updatePeriod = 0;
/**
* Create a new JPanel with a double buffer and a flow layout
*/
public GraphPanel(int updatePeriod)
{
this.setPreferredSize(new Dimension(400,300));
/** Create graph bean **/
_graphingBean = new XYGraphingBean();
_graphingBean.setXAxisLabel("Sample");
_graphingBean.setYAxisLabel("Value");
/** Create initial graph image **/
_graphImage = _graphingBean.createGraphImage(400,300);
_updatePeriod = updatePeriod;
/** Register component listener to resize the image if the panel is resized **/
this.addComponentListener(new ComponentAdapter() {
/**
* Invoked when the component's size changes.
*/
public void componentResized(ComponentEvent e)
{
Component c = e.getComponent();
if ( ( c.getWidth() > 0 ) && ( c.getHeight() > 0 ) )
{
_graphImage = _graphingBean.createGraphImage(c.getWidth(), c.getHeight());
}
}
});
_repainter = new Thread(this);
_repainter.setName("Repainter-Thread");
_repainter.start();
}
public void stopRepainting()
{
_repaint = false;
_repainter.interrupt();
}
public void run()
{
while (_repaint)
{
try
{
Thread.sleep(_updatePeriod);
}
catch (Exception e)
{
// Ignore
}
updateGraph();
}
}
public void updateGraph()
{
if ( ( this.getWidth() > 0 ) && ( this.getHeight() > 0 ) )
{
_graphImage = _graphingBean.createGraphImage(this.getWidth(), this.getHeight());
}
repaint();
}
public XYGraphingBean getGraphingBean()
{
return _graphingBean;
}
public void paint(Graphics g)
{
g.drawImage(_graphImage, 0, 0, this);
}
public void update(Graphics g)
{
paint(g);
}
}