ChartDirector 6.1 (Java Edition)

Waterfall Chart

This example demonstrates creating a multi-color waterfall chart.

This chart is created as a multi-color box-whisker layer using XYChart.addBoxWhiskerLayer2. Only the "box" part of the box-whisker layer is used.

The top-edges of the boxes are obtained by accumulating the raw data using the ArrayMath utility. The bottom-edges of the boxes are simply the top-edges of previous boxes, with the exception of the last "total" box which always starts at 0.

Source Code Listing

[JSP Version] jspdemo/waterfall.jsp
 ```<%@page import="ChartDirector.*" %> <% // 4 data points to represent the cash flow for the Q1 - Q4 double[] data = {230, 140, 220, 330, 150}; // We want to plot a waterfall chart showing the 4 quarters as well as the total String[] labels = {"Product 1", "Product 2", "Product 3", "Product 4", "Product 5", "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).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; // 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, 290, 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("Product Revenue - 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, 45, 430, 215, 0xffffff, 0xeeeeee); // 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 multi-color box-whisker layer to represent the waterfall bars BoxWhiskerLayer layer = c.addBoxWhiskerLayer2(boxTop, boxBottom); // 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 String chart1URL = c.makeSession(request, "chart1"); // Include tool tip for the chart String imageMap1 = c.getHTMLImageMap("", "", "title='{xLabel}: {={top}-{bottom}} millions'"); %>
Waterfall Chart

View Source Code
<%=imageMap1%> ```

 ```import java.awt.*; import java.awt.event.*; import javax.swing.*; import ChartDirector.*; public class waterfall implements DemoModule { //Name of demo program public String toString() { return "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 chartIndex) { // 4 data points to represent the cash flow for the Q1 - Q4 double[] data = {230, 140, 220, 330, 150}; // We want to plot a waterfall chart showing the 4 quarters as well as the total String[] labels = {"Product 1", "Product 2", "Product 3", "Product 4", "Product 5", "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).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; // 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, 290, 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("Product Revenue - 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, 45, 430, 215, 0xffffff, 0xeeeeee); // 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 multi-color box-whisker layer to represent the waterfall bars BoxWhiskerLayer layer = c.addBoxWhiskerLayer2(boxTop, boxBottom); // 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 waterfall(); //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); } }```