/**
* Copyright 2011 - 2014 Xeiam LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.xeiam.xchart.demo.charts.realtime;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JFrame;
import com.xeiam.xchart.Chart;
import com.xeiam.xchart.XChartPanel;
import com.xeiam.xchart.demo.charts.ExampleChart;
/**
* Realtime
* <p>
* Demonstrates the following:
* <ul>
* <li>real-time chart updates
* <li>fixed window
* <li>error bars
*/
public class RealtimeChart03 implements ExampleChart {
private List<Integer> xData = new ArrayList<Integer>();
private List<Double> yData = new ArrayList<Double>();
private List<Double> errorBars = new ArrayList<Double>();
public static final String SERIES_NAME = "series1";
public static void main(String[] args) {
// Setup the panel
final RealtimeChart03 realtimeChart03 = new RealtimeChart03();
final XChartPanel chartPanel = realtimeChart03.buildPanel();
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
// Create and set up the window.
JFrame frame = new JFrame("XChart");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(chartPanel);
// Display the window.
frame.pack();
frame.setVisible(true);
}
});
// Simulate a data feed
TimerTask chartUpdaterTask = new TimerTask() {
@Override
public void run() {
realtimeChart03.updateData();
chartPanel.updateSeries(SERIES_NAME, realtimeChart03.xData, realtimeChart03.getyData(), realtimeChart03.errorBars);
}
};
Timer timer = new Timer();
timer.scheduleAtFixedRate(chartUpdaterTask, 0, 500);
}
public XChartPanel buildPanel() {
return new XChartPanel(getChart());
}
@Override
public Chart getChart() {
yData.add(0.0);
for (int i = 0; i < 50; i++) {
double lastPoint = yData.get(yData.size() - 1);
yData.add(getRandomWalk(lastPoint));
}
// generate X-Data
xData = new ArrayList<Integer>();
for (int i = 1; i < yData.size() + 1; i++) {
xData.add(i);
}
// generate error bars
errorBars = new ArrayList<Double>();
for (int i = 0; i < yData.size(); i++) {
errorBars.add(20 * Math.random());
}
// Create Chart
Chart chart = new Chart(500, 400);
chart.setChartTitle("Sample Real-time Chart");
chart.setXAxisTitle("X");
chart.setYAxisTitle("Y");
chart.addSeries(SERIES_NAME, xData, yData, errorBars);
return chart;
}
private Double getRandomWalk(double lastPoint) {
return lastPoint + (Math.random() * 100 - 50);
}
public void updateData() {
// Get some new data
double lastPoint = yData.get(yData.size() - 1);
yData.add(getRandomWalk(lastPoint));
yData.remove(0);
// update error bars
errorBars.add(20 * Math.random());
errorBars.remove(0);
}
public List<Double> getyData() {
return yData;
}
}