ChartDirector 5.1 (ColdFusion Edition)

Multi-Color Bar Chart




This example demonstrates creating a multi-color bar chart, in which each bar has a different color. It also demonstrates metallic background colors and various 3D border effects.

A multi-color bar layer is a bar layer in which each bar has a different color. It is created using XYChart.addBarLayer3. The colors can be specified explicitly (as is in this example), or can be taken automatically from the color palette.

Source Code Listing

[File: cfdemo/colorbar.cfm]
<cfscript>

// ChartDirector for ColdFusion API Access Point
cd = CreateObject("java", "ChartDirector.CFChart");

// A utility to allow us to create arrays with data in one line of code
function Array() {
    var result = ArrayNew(1);
    var i = 0;
    for (i = 1; i LTE ArrayLen(arguments); i = i + 1)
        result[i] = arguments[i];
    return result;
}

// The data for the bar chart
data = Array(85, 156, 179.5, 211, 123);

// The labels for the bar chart
labels = Array("Mon", "Tue", "Wed", "Thu", "Fri");

// The colors for the bar chart
colors = Array("0xb8bc9c", "0xa0bdc4", "0x999966", "0x333366", "0xc3c3e6");

// Create a XYChart object of size 300 x 220 pixels. Use golden background color. Use
// a 2 pixel 3D border.
c = cd.XYChart(300, 220, cd.goldColor(), -1, 2);

// Add a title box using 10 point Arial Bold font. Set the background color to
// metallic blue (9999FF) Use a 1 pixel 3D border.
c.addTitle("Daily Network Load", "Arial Bold", 10).setBackground(cd.metalColor(
    "0x9999ff"), -1, 1);

// Set the plotarea at (40, 40) and of 240 x 150 pixels in size
c.setPlotArea(40, 40, 240, 150);

// Add a multi-color bar chart layer using the given data and colors. Use a 1 pixel
// 3D border for the bars.
c.addBarLayer3(data, colors).setBorderColor(-1, 1);

// Set the labels on the x axis.
c.xAxis().setLabels(labels);

// Output the chart
chart1URL = c.makeSession(GetPageContext(), "chart1");

// Include tool tip for the chart
imageMap1 = c.getHTMLImageMap("", "", "title='{xLabel}: {value} GBytes'");

</cfscript>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Multi-Color Bar Chart
</div>
<hr style="border:solid 1px #000080" />
<cfoutput>
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <a href='viewsource.cfm?file=#CGI.SCRIPT_NAME#'>View Source Code</a>
</div>
<img src="getchart.cfm?#chart1URL#" usemap="##map1" border="0" />
<map name="map1">#imageMap1#</map>
</cfoutput>
</body>
</html>