import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;
public class trendline implements DemoModule
{
//Name of demo program
public String toString() { return "Trend Line Chart"; }
//Number of charts produced in this demo
public int getNoOfCharts() { return 1; }
//Main code for creating charts
public void createChart(ChartViewer viewer, int index)
{
// The data for the line chart
double[] data = {50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67,
67, 58, 59, 73, 77, 84, 82, 80, 91};
// The labels for the line chart
String[] labels = {"Jan 2000", "Feb 2000", "Mar 2000", "Apr 2000",
"May 2000", "Jun 2000", "Jul 2000", "Aug 2000", "Sep 2000", "Oct 2000",
"Nov 2000", "Dec 2000", "Jan 2001", "Feb 2001", "Mar 2001", "Apr 2001",
"May 2001", "Jun 2001", "Jul 2001", "Aug 2001", "Sep 2001", "Oct 2001",
"Nov 2001", "Dec 2001"};
// Create a XYChart object of size 500 x 320 pixels, with a pale purpule
// (0xffccff) background, a black border, and 1 pixel 3D border effect.
XYChart c = new XYChart(500, 320, 0xffccff, 0x000000, 1);
// Set the plotarea at (55, 45) and of size 420 x 210 pixels, with white
// background. Turn on both horizontal and vertical grid lines with light
// grey color (0xc0c0c0)
c.setPlotArea(55, 45, 420, 210, 0xffffff, -1, -1, 0xc0c0c0, -1);
// Add a legend box at (55, 25) (top of the chart) with horizontal layout.
// Use 8 pts Arial font. Set the background and border color to Transparent.
c.addLegend(55, 22, false, "", 8).setBackground(Chart.Transparent);
// Add a title box to the chart using 13 pts Times Bold Italic font. The text
// is white (0xffffff) on a purple (0x800080) background, with a 1 pixel 3D
// border.
c.addTitle("Long Term Server Load", "Times New Roman Bold Italic", 13,
0xffffff).setBackground(0x800080, -1, 1);
// Add a title to the y axis
c.yAxis().setTitle("MBytes");
// Set the labels on the x axis. Rotate the font by 90 degrees.
c.xAxis().setLabels(labels).setFontAngle(90);
// Add a line layer to the chart
LineLayer lineLayer = c.addLineLayer();
// Add the data to the line layer using light brown color (0xcc9966) with a 7
// pixel square symbol
lineLayer.addDataSet(data, 0xcc9966, "Server Utilization").setDataSymbol(
Chart.SquareSymbol, 7);
// Set the line width to 2 pixels
lineLayer.setLineWidth(2);
// tool tip for the line layer
lineLayer.setHTMLImageMap("", "", "title='{xLabel}: {value} MBytes'");
// Add a trend line layer using the same data with a dark green (0x008000)
// color. Set the line width to 2 pixels
TrendLayer trendLayer = c.addTrendLayer(data, 0x008000, "Trend Line");
trendLayer.setLineWidth(2);
// tool tip for the trend layer
trendLayer.setHTMLImageMap("", "",
"title='Change rate: {slope|2} MBytes/per month'");
// Output the chart
viewer.setChart(c);
// include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("clickable"));
}
//Allow this module to run as standalone program for easy testing
public static void main(String[] args)
{
//Instantiate an instance of this demo module
DemoModule demo = new trendline();
//Create and set up the main window
JFrame frame = new JFrame(demo.toString());
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);} });
frame.getContentPane().setBackground(Color.white);
// Create the chart and put them in the content pane
ChartViewer viewer = new ChartViewer();
demo.createChart(viewer, 0);
frame.getContentPane().add(viewer);
// Display the window
frame.pack();
frame.setVisible(true);
}
} |