Cylinder Bar Shading

This example demonstrates using cylinder shading effect for bars and gradient color for plot area background. It also demonstrates putting axis labels on both sides of the plot area.

The cylinder shading effect is the result of using the cylinder bar shape in 2D.

The gradient plot area background is configured by using BaseChart.linearGradientColor to define the gradient color, then use XYChart.setPlotArea to apply it to the plot area.
The XYChart.setPlotArea also sets the plot area border and grid line colors to white.
The cylinder shading effect is configured by using BarLayer.setBarShape with CircleShape. In 2D, the circle shape is represented as cylinder shading.
In the example, the chart is configured using XYChart.syncYAxis to show two synchronized y-axes on both sides of the plot area.
The axes are invisible in this chart. Only the axis labels are visible. This is by using Axis.setColors to set the axes to Transparent.
The axis label fonts are set to Arial bold using Axis.setLabelStyle.

[File: cfdemo/cylinderlightbar.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(450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700);

// The labels for the bar chart
labels = Array("1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003",
    "2004", "2005");

// Create a XYChart object of size 600 x 360 pixels
c = cd.XYChart(600, 360);

// Add a title to the chart using 18pts Times Bold Italic font
c.addTitle("Annual Revenue for Star Tech", "Times New Roman Bold Italic", 18);

// Set the plotarea at (60, 40) and of size 480 x 280 pixels. Use a vertical gradient
// color from light green (eeffee) to dark green (008800) as background. Set border
// and grid lines to white (ffffff).
c.setPlotArea(60, 40, 480, 280, c.linearGradientColor(60, 40, 60, 280, "0xeeffee",
    "0x008800"), -1, "0xffffff", "0xffffff");

// Add a multi-color bar chart layer using the supplied data. Set cylinder bar shape.
c.addBarLayer3(data).setBarShape(cd.CircleShape);

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

// Show the same scale on the left and right y-axes
c.syncYAxis();

// Set the left y-axis and right y-axis title using 10pt Arial Bold font
c.yAxis().setTitle("USD (millions)", "Arial Bold", 10);
c.yAxis2().setTitle("USD (millions)", "Arial Bold", 10);

// Set all axes to transparent
c.xAxis().setColors(cd.Transparent);
c.yAxis().setColors(cd.Transparent);
c.yAxis2().setColors(cd.Transparent);

// Set the label styles of all axes to 8pt Arial Bold font
c.xAxis().setLabelStyle("Arial Bold", 8);
c.yAxis().setLabelStyle("Arial Bold", 8);
c.yAxis2().setLabelStyle("Arial Bold", 8);

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

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

</cfscript>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Cylinder Bar Shading
</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>