import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;
public class posnegwaterfall implements DemoModule
{
//Name of demo program
public String toString() { return "Pos/Neg Waterfall 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)
{
// 4 data points to represent the cash flow for the Q1 - Q4
double[] data = {230, -140, 220, 330};
// We want to plot a waterfall chart showing the 4 quarters as well as the
// total
String[] labels = {"1st Quarter", "2nd Quarter", "3rd Quarter",
"4th Quarter", "Total"};
// The top side of the bars in a waterfall chart is the accumulated data. We
// use the ChartDirector ArrayMath utility to accumulate the data. The
// "total" is handled by inserting a zero point at the end before
// accumulation (after accumulation it will become the total).
double[] boxTop = new ArrayMath(data).insert2(0, 1, data.length).acc(
).result();
// The botom side of the bars is just the top side of the previous bar. So we
// shifted the top side data to obtain the bottom side data.
double[] boxBottom = new ArrayMath(boxTop).shift(1, 0).result();
// The last point (total) is different. Its bottom side is always 0.
boxBottom[boxBottom.length - 1] = 0;
// In this example, we want to use different colors depending on the data is
// positive or negative.
int posColor = 0x00ff00;
int negColor = 0xff0000;
// Create a XYChart object of size 500 x 280 pixels. Set background color to
// light blue (ccccff), with 1 pixel 3D border effect.
XYChart c = new XYChart(500, 300, 0xccccff, 0x000000, 1);
// Add a title to the chart using 13 points Arial Bold Itatic font, with
// white (ffffff) text on a deep blue (0x80) background
c.addTitle("Corporate Cash Flow - Year 2004", "Arial Bold Italic", 13,
0xffffff).setBackground(0x000080);
// Set the plotarea at (55, 50) and of size 430 x 215 pixels. Use alternative
// white/grey background.
c.setPlotArea(55, 50, 430, 215, 0xffffff, 0xeeeeee);
// Add a legend box at (55, 25) using 8 pts Arial Bold font with horizontal
// layout, with transparent background and border color.
LegendBox b = c.addLegend(55, 25, false, "Arial Bold", 8);
b.setBackground(Chart.Transparent, Chart.Transparent);
// Add keys to show the colors for positive and negative cash flows
b.addKey("Positive Cash Flow", posColor);
b.addKey("Negative Cash Flow", negColor);
// Set the labels on the x axis using Arial Bold font
c.xAxis().setLabels(labels).setFontStyle("Arial Bold");
// Set the x-axis ticks and grid lines to be between the bars
c.xAxis().setTickOffset(0.5);
// Use Arial Bold as the y axis label font
c.yAxis().setLabelStyle("Arial Bold");
// Add a title to the y axis
c.yAxis().setTitle("USD (in millions)");
// Add a box-whisker layer to represent the waterfall bars
BoxWhiskerLayer layer = c.addBoxWhiskerLayer(boxTop, boxBottom);
// Color the bars depending on whether it is positive or negative
for (int i = 0; i < boxTop.length; ++i) {
if (boxTop[i] >= boxBottom[i]) {
layer.setBoxColor(i, posColor);
} else {
layer.setBoxColor(i, negColor);
}
}
// Put data labels on the bars to show the cash flow using Arial Bold font
layer.setDataLabelFormat("{={top}-{bottom}}M");
layer.setDataLabelStyle("Arial Bold").setAlignment(Chart.Center);
// Output the chart
viewer.setChart(c);
//include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("clickable", "",
"title='{xLabel}: {={top}-{bottom}} millions'"));
}
//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 posnegwaterfall();
//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);
}
} |