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

# This script can draw different charts depending on the chartIndex
$chartIndex = (int)($_REQUEST["img"]);

# The value to display on the meter
$value = 74.25;

# Create a LinearMeter object of size 70 x 260 pixels with very light grey (0xeeeeee) backgruond and
# a grey (0xbbbbbb) 3-pixel thick rounded frame
$m = new LinearMeter(70, 260, 0xeeeeee, 0xbbbbbb);
$m->setRoundedFrame(Transparent);
$m->setThickFrame(3);

# Set the scale region top-left corner at (28, 33), with size of 20 x 194 pixels. The scale labels
# are located on the left (default - implies vertical meter).
$m->setMeter(28, 33, 20, 194);

# Set meter scale from 0 - 100, with a tick every 10 units
$m->setScale(0, 100, 10);

# Demostrate different types of color scales
$smoothColorScale = array(0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000);
$stepColorScale = array(0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100);
$highColorScale = array(70, Transparent, 100, 0xff0000);
$lowColorScale = array(0, 0x0000ff, 30, Transparent);

if ($chartIndex == 0) {
    # Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
    $m->addBar(0, $value, 0x0088ff, glassEffect(NormalGlare, Left), 4);
    # Add a 6-pixel thick smooth color scale at x = 53 (right of meter scale)
    $m->addColorScale($smoothColorScale, 53, 6);
} else if ($chartIndex == 1) {
     # Add a green (0x00cc00) bar from 0 to value with bar lighting effect and 4 pixel rounded
     # corners
    $m->addBar(0, $value, 0x00cc00, barLighting(), 4);
    # Add a high only color scale at x = 52 (right of meter scale) with thickness varying from 0 to
    # 8
    $m->addColorScale($highColorScale, 52, 0, 52, 8);
    # Add a low only color scale at x = 52 (right of meter scale) with thickness varying from 8 to 0
    $m->addColorScale($lowColorScale, 52, 8, 52, 0);
} else if ($chartIndex == 2) {
    # Add a purple (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
    $m->addBar(0, $value, 0x8833dd, glassEffect(NormalGlare, Left), 4);
    # Add a high only color scale at x = 52 (right of meter scale) with thickness varying from 0 to
    # 8
    $m->addColorScale($highColorScale, 52, 0, 52, 8);
} else if ($chartIndex == 3) {
     # Add a orange (0xff8800) bar from 0 to value with cylinder lighting effect
    $m->addBar(0, $value, 0xff8800, cylinderEffect());
    # Add a high only color scale at x = 53 (right of meter scale)
    $m->addColorScale($highColorScale, 53, 6);
} else if ($chartIndex == 4) {
    # Add a red (0xee3333) bar from 0 to value with glass effect and 4 pixel rounded corners
    $m->addBar(0, $value, 0xee3333, glassEffect(NormalGlare, Left), 4);
    # Add a step color scale at x = 53 (right of meter scale)
    $m->addColorScale($stepColorScale, 53, 6);
} else {
     # Add a grey (0xaaaaaa) bar from 0 to value
    $m->addBar(0, $value, 0xaaaaaa);
    # Add a smooth color scale at x = 52 (right of meter scale) with thickness varying from 0 to 8
    $m->addColorScale($smoothColorScale, 52, 0, 52, 8);
}

# Add a title using 8pt Arial Bold font with grey (0xbbbbbb) background
$textBoxObj = $m->addTitle("Temp C", "arialbd.ttf", 8, TextColor);
$textBoxObj->setBackground(0xbbbbbb);

# Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold font
# on a black (0x000000) background with rounded border.
$t = $m->addText($m->getWidth() / 2, $m->getHeight() - 8, $m->formatValue($value, "2"),
    "arialbd.ttf", 8, 0xffffff, Bottom);
$t->setBackground(0x000000);
$t->setRoundedCorners(3);
$t->setMargin2(5, 5, 2, 1);

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