ChartDirector 6.0 (ColdFusion Edition)

Vertical Linear Meter




This example demonstrates the basic steps in creating a vertical linear meter.

A vertical linear meter can be created using the following steps:

Source Code Listing

[File: cfdemo/vlinearmeter.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 = 74.35;

// Create an LinearMeter object of size 70 x 240 pixels with a very light grey (0xeeeeee)
// background, and a rounded 3-pixel thick light grey (0xcccccc) border
m = cd.LinearMeter(70, 240, "0xeeeeee", "0xcccccc");
m.setRoundedFrame(cd.Transparent);
m.setThickFrame(3);

// Set the scale region top-left corner at (28, 18), with size of 20 x 205 pixels. The scale labels
// are located on the left (default - implies vertical meter).
m.setMeter(28, 18, 20, 205);

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

// Add a smooth color scale to the meter
smoothColorScale = Array(0, "0x6666ff", 25, "0x00bbbb", 50, "0x00ff00", 75, "0xffff00", 100,
    "0xff0000");
m.addColorScale(smoothColorScale);

// Add a blue (0x0000cc) pointer at the specified value
m.addPointer(value, "0x0000cc");

// 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">
    Vertical Linear 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>