ChartDirector 6.0 (ColdFusion Edition)

Icon Angular Meter




This example demonstrates a fuel-tank like meters, in which the meter is labelled by an icon and the scale shows text abbreviations.

The scale labels on the meter is created by using BaseMeter.setScale2. The icon is created by adding a text box with BaseChart.addText and using CDML to specify an icon.

Source Code Listing

[File: cfdemo/iconameter.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 value to display on the meter
value = 85;

// Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2 pixel 3D
// depressed border.
m = cd.AngularMeter(70, 90, 0, 0, -2);

// Set search path to current directory for loading icon images
m.setSearchPath(GetPageContext());

// Use white on black color palette for default text and line colors
m.setColors(cd.whiteOnBlackPalette);

// Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45 degrees
m.setMeter(10, 45, 50, 135, 45);

// Set meter scale from 0 - 100, with the specified labels
m.setScale2(0, 100, Array("E", " ", " ", " ", "F"));

// Set the angular arc and major tick width to 2 pixels
m.setLineWidth(2, 2);

// Add a red zone at 0 - 15
m.addZone(0, 15, "0xff3333");

// Add an icon at (25, 35)
m.addText(25, 35, "<*img=gas.gif*>");

// Add a yellow (ffff00) pointer at the specified value
m.addPointer(value, "0xffff00");

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

</cfscript>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Icon Angular Meter
</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#" />
</cfoutput>
</body>
</html>