ChartDirector 6.0 (ColdFusion Edition)

H-Linear Meter Orientation


      

This example demonstrates horizontal linear meters in different orientations.

In a horizontal linear meter, the scale labels can be positioned above the meter scale or below it. This is controlled by the last argument to LinearMeter.setMeter, which can be Top or Bottom,

The title and value readout added using BaseChart.addText can be put at any position. In this example, we put them at the opposite side to the scale labels.

Source Code Listing

[File: cfdemo/hlinearmeterorientation.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;
}

// Function to create the demo charts
function createChart(chartIndex)
{
    // Declare local variables
    var value = 0;
    var m = 0;
    var alignment = 0;
    var meterYPos = 0;
    var labelYPos = 0;
    var smoothColorScale = 0;
    var t = 0;

    // The value to display on the meter
    value = 74.25;

    // Create a LinearMeter object of size 250 x 75 pixels with very light grey (0xeeeeee)
    // backgruond and a light grey (0xccccccc) 3-pixel thick rounded frame
    m = cd.LinearMeter(250, 75, "0xeeeeee", "0xcccccc");
    m.setRoundedFrame(cd.Transparent);
    m.setThickFrame(3);

    // This example demonstrates putting the text labels at the top or bottom. This is by setting
    // the label alignment, scale position and label position.
    alignment = Array(cd.Top, cd.Top, cd.Bottom, cd.Bottom);
    meterYPos = Array(23, 23, 34, 34);
    labelYPos = Array(61, 61, 15, 15);

    // Set the scale region
    m.setMeter(14, meterYPos[chartIndex + 1], 218, 20, alignment[chartIndex + 1]);

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

    // Add a smooth color scale at the default position
    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");

    //
    // In this example, some charts have the "Temperauture" label on the left side and the value
    // readout on the right side, and some charts have the reverse
    //

    if (chartIndex Mod 2 EQ 0) {
        // Add a label on the left side using 8pt Arial Bold font
        m.addText(10, labelYPos[chartIndex + 1], "Temperature C", "Arial Bold", 8, cd.TextColor,
            cd.Left);

        // Add a text box on the right side. Display the value using white (0xffffff) 8pt Arial Bold
        // font on a black (0x000000) background with depressed rounded border.
        t = m.addText(235, labelYPos[chartIndex + 1], m.formatValue(value, "2"), "Arial Bold", 8,
            "0xffffff", cd.Right);
        t.setBackground("0x000000", "0x000000", -1);
        t.setRoundedCorners(3);
    } else {
        // Add a label on the right side using 8pt Arial Bold font
        m.addText(237, labelYPos[chartIndex + 1], "Temperature C", "Arial Bold", 8, cd.TextColor,
            cd.Right);

        // Add a text box on the left side. Display the value using white (0xffffff) 8pt Arial Bold
        // font on a black (0x000000) background with depressed rounded border.
        t = m.addText(11, labelYPos[chartIndex + 1], m.formatValue(value, "2"), "Arial Bold", 8,
            "0xffffff", cd.Left);
        t.setBackground("0x000000", "0x000000", -1);
        t.setRoundedCorners(3);
    }

    // Output the chart
    return m.makeSession(GetPageContext(), "chart" & chartIndex);
}

chart0URL = createChart(0);
chart1URL = createChart(1);
chart2URL = createChart(2);
chart3URL = createChart(3);

</cfscript>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    H-Linear Meter Orientation
</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?#chart0URL#" />
<img src="getchart.cfm?#chart1URL#" />
<img src="getchart.cfm?#chart2URL#" />
<img src="getchart.cfm?#chart3URL#" />
</cfoutput>
</body>
</html>