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

# The value to display on the meter
$value = 75.35;

# 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 200 x 50 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 a blue (0000cc) pointer at the specified value
$m->addPointer($value, 0x0000cc);

# Add a label at bottom-left (10, 68) using Arial Bold/8 pts/red (c00000)
$m->addText(10, 68, "Temperature C", "arialbd.ttf", 8, 0xc00000, BottomLeft);

# Add a text box to show the value formatted to 2 decimal places at bottom right. Use
# white text on black background with a 1 pixel depressed 3D border.
$textBoxObj = $m->addText(238, 70, $m->formatValue($value, "2"), "arial.ttf", 8,
    0xffffff, BottomRight);
$textBoxObj->setBackground(0, 0, -1);

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