ChartDirector 6.0 (ColdFusion Edition)

Multi-Pointer Horizontal Meter




This example demonstrates a horizontal linear meter with multiple pointers.

Source Code Listing

[File: cfdemo/multihmeter.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 values to display on the meter
value0 = 30.99;
value1 = 45.35;
value2 = 77.64;

// Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2 pixel
// black 3D depressed border.
m = cd.LinearMeter(250, 75, cd.silverColor(), 0, -2);

// Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale labels
// are located on the top (implies horizontal meter)
m.setMeter(15, 25, 220, 20, cd.Top);

// Set meter scale from 0 - 100, with a tick every 10 units
m.setScale(0, 100, 10);

// Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red (ffcccc)
// zone
m.addZone(0, 50, "0x99ff99");
m.addZone(50, 80, "0xffff66");
m.addZone(80, 100, "0xffcccc");

// Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the values
m.addPointer(value0, "0x000080");
m.addPointer(value1, "0x008000");
m.addPointer(value2, "0x800000");

// Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000)
m.addText(10, 68, "Temp C", "Arial Bold", 8, "0xc00000", cd.BottomLeft);

// Add three text boxes to show the values in this meter
m.addText(148, 70, m.formatValue(value0, "2"), "Arial", 8, "0x6666ff", cd.BottomRight
    ).setBackground(0, 0, -1);
m.addText(193, 70, m.formatValue(value1, "2"), "Arial", 8, "0x33ff33", cd.BottomRight
    ).setBackground(0, 0, -1);
m.addText(238, 70, m.formatValue(value2, "2"), "Arial", 8, "0xff3333", cd.BottomRight
    ).setBackground(0, 0, -1);

// 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">
    Multi-Pointer Horizontal 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>