ChartDirector Ver 5.0 (PHP Edition)

Multi-Pointer Horizontal Meter

This example demonstrates a horizontal linear meter with multiple pointers.
ChartDirector supports adding arbitrary number of pointers to a meter using BaseMeter.addPointer. The shape of each pointer is configurable by using MeterPointer.setShape or MeterPointer.setShape2.

Source Code Listing

[File: phpdemo/multihmeter.php]

    <?php
    require_once("../lib/phpchartdir.php");

    # 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 = new LinearMeter(250, 75, 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, 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/8 pts/red (c00000)
    $m->addText(10, 68, "Temp C", "arialbd.ttf", 8, 0xc00000, BottomLeft);

    # Add three text boxes to show the values in this meter
    $textBoxObj = $m->addText(148, 70, $m->formatValue($value0, "2"), "arial.ttf", 8,
        0x6666ff, BottomRight);
    $textBoxObj->setBackground(0, 0, -1);
    $textBoxObj = $m->addText(193, 70, $m->formatValue($value1, "2"), "arial.ttf", 8,
        0x33ff33, BottomRight);
    $textBoxObj->setBackground(0, 0, -1);
    $textBoxObj = $m->addText(238, 70, $m->formatValue($value2, "2"), "arial.ttf", 8,
        0xff3333, BottomRight);
    $textBoxObj->setBackground(0, 0, -1);

    # Output the chart
    header("Content-type: image/png");
    print($m->makeChart2(PNG));
    ?>

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