ChartDirector 6.0 (PHP Edition)

Black Vertical Linear Meters


          

This example demonstrates vertical bar meters in a black coloring scheme.

Source Code Listing

[File: phpdemo/blackvlinearmeter.php]
<?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 black background and rounded corners
$m = new LinearMeter(70, 260, 0x000000);
$m->setRoundedFrame(Transparent);

# Set the default text and line colors to white (0xffffff)
$m->setColor(TextColor, 0xffffff);
$m->setColor(LineColor, 0xffffff);

# Set the scale region top-left corner at (28, 30), with size of 20 x 196 pixels. The scale labels
# are located on the left (default - implies vertical meter)
$m->setMeter(28, 30, 20, 196);

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

# The tick line width to 1 pixel
$m->setLineWidth(0, 1);

# Demostrate different types of color scales and putting them at different positions
$smoothColorScale = array(0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000);
$stepColorScale = array(0, 0x00cc00, 50, 0xeecc00, 80, 0xdd0000, 100);
$highLowColorScale = array(0, 0x0000ff, 70, Transparent, 100, 0xff0000);

if ($chartIndex == 0) {
    # Add the smooth color scale at the default position
    $m->addColorScale($smoothColorScale);
} else if ($chartIndex == 1) {
    # Add the step color scale at the default position
    $m->addColorScale($stepColorScale);
} else if ($chartIndex == 2) {
    # Add the high low scale at the default position
    $m->addColorScale($highLowColorScale);
} else if ($chartIndex == 3) {
    # Add the smooth color scale starting at x = 28 (left of scale) with zero width and ending at x
    # = 28 with 20 pixels width
    $m->addColorScale($smoothColorScale, 28, 0, 28, 20);
} else if ($chartIndex == 4) {
    # Add the smooth color scale starting at x = 38 (center of scale) with zero width and ending at
    # x = 28 with 20 pixels width
    $m->addColorScale($smoothColorScale, 38, 0, 28, 20);
} else {
    # Add the smooth color scale starting at x = 48 (right of scale) with zero width and ending at x
    # = 28 with 20 pixels width
    $m->addColorScale($smoothColorScale, 48, 0, 28, 20);
}

# Add a blue (0x0000cc) pointer with white (0xffffff) border at the specified value
$m->addPointer($value, 0x0000cc, 0xffffff);

# Add a label at the top-center using 8pt Arial Bold font
$m->addText($m->getWidth() / 2, 5, "Temp C", "arialbd.ttf", 8, TextColor, Top);

# Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold font
# on a black (0x000000) background with depressed grey (0x444444) rounded border.
$t = $m->addText($m->getWidth() / 2, $m->getHeight() - 7, $m->formatValue($value, "2"),
    "arialbd.ttf", 8, 0xffffff, Bottom);
$t->setBackground(0x000000, 0x444444, -1);
$t->setRoundedCorners(3);

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