Mega Code Archive
Chart Timing 4
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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------
* ChartTiming4.java
* -----------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: ChartTiming4.java,v 1.16 2004/04/26 19:11:53 taqua Exp $
*
* Changes
* -------
* 29-Oct-2002 : Version 1 (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import javax.swing.Timer;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.FastScatterPlot;
import org.jfree.chart.plot.Plot;
/**
* Draws a scatter plot over and over for 10 seconds. Reports on how many redraws were achieved.
* <p>
* On my PC (SuSE Linux 8.2, JDK 1.4, 256mb RAM, 2.66ghz Pentium) I get 31 charts per second.
*
*/
public class ChartTiming4 implements ActionListener {
/** A flag that indicates when time is up. */
private boolean finished;
/** Storage for the data. */
private float[][] data = new float[2][1440];
/**
* Creates a new application.
*/
public ChartTiming4() {
// nothing to do
}
/**
* Runs the test.
*/
public void run() {
this.finished = false;
// create a dataset...
populateData();
// create a fast scatter chart...
final Plot plot = new FastScatterPlot(this.data, new NumberAxis("X"), new NumberAxis("Y"));
final JFreeChart chart = new JFreeChart(
"Fast Scatter Plot Timing",
JFreeChart.DEFAULT_TITLE_FONT,
plot,
true
);
final BufferedImage image = new BufferedImage(400, 300, BufferedImage.TYPE_INT_RGB);
final Graphics2D g2 = image.createGraphics();
final Rectangle2D chartArea = new Rectangle2D.Double(0, 0, 400, 300);
// set up the timer...
final Timer timer = new Timer(10000, this);
timer.setRepeats(false);
int count = 0;
timer.start();
while (!this.finished) {
chart.draw(g2, chartArea, null, null);
System.out.println("Charts drawn..." + count);
if (!this.finished) {
count++;
}
}
System.out.println("DONE");
}
/**
* Receives notification of action events (in this case, from the Timer).
*
* @param event the event.
*/
public void actionPerformed(final ActionEvent event) {
this.finished = true;
}
/**
* Populates the data array with random values.
*/
private void populateData() {
for (int i = 0; i < this.data[0].length; i++) {
final float x = i;
this.data[0][i] = x;
this.data[1][i] = 100 + (2 * x) + (float) Math.random() * 1440;
}
}
/**
* Starting point for the application.
*
* @param args ignored.
*/
public static void main(final String[] args) {
final ChartTiming4 app = new ChartTiming4();
app.run();
}
}
jfreechart-1.0.0-rc1.zip( 3,559 k)
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