ChartDirector Ver 4.1 (PHP Edition Edition)

Multi-Pointer Vertical Meter

This example demonstrates a vertical 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/multivmeter.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 60 x 245 pixels, using silver background with
    # a 2 pixel black 3D depressed border.
    $m = new LinearMeter(60, 245, silverColor(), 0, -2);

    # Set the scale region top-left corner at (25, 30), with size of 20 x 200 pixels. The
    # scale labels are located on the left (default - implies vertical meter)
    $m->setMeter(25, 30, 20, 200);

    # 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 text box label at top-center (30, 5) using Arial Bold/8 pts/deep blue
    # (000088), with a light blue (9999ff) background
    $textBoxObj = $m->addText(30, 5, "Temp C", "arialbd.ttf", 8, 0x000088, TopCenter);
    $textBoxObj->setBackground(0x9999ff);

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

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