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

# Sample data for the Box-Whisker chart. Represents the minimum, 1st quartile,
# medium, 3rd quartile and maximum values of some quantities
$Q0Data = array(40, 45, 40, 30, 20, 50, 25, 44);
$Q1Data = array(55, 60, 50, 40, 38, 60, 51, 60);
$Q2Data = array(62, 70, 60, 50, 48, 70, 62, 70);
$Q3Data = array(70, 80, 65, 60, 53, 78, 69, 76);
$Q4Data = array(80, 90, 75, 70, 60, 85, 80, 84);

# The labels for the chart
$labels = array("Group A", "Group B", "Group C", "Group D", "Group E", "Group F",
    "Group G", "Group H");

# Create a XYChart object of size 550 x 250 pixels
$c = new XYChart(550, 275);

# Set the plotarea at (50, 25) and of size 450 x 200 pixels. Enable both horizontal
# and vertical grids by setting their colors to grey (0xc0c0c0)
$plotAreaObj = $c->setPlotArea(50, 50, 450, 200);
$plotAreaObj->setGridColor(0xc0c0c0, 0xc0c0c0);

# Add a title to the chart
$c->addTitle("Computer Vision Test Scores");

# Set the labels on the x axis and the font to Arial Bold
$labelsObj = $c->xAxis->setLabels($labels);
$labelsObj->setFontStyle("arialbd.ttf");

# Set the font for the y axis labels to Arial Bold
$c->yAxis->setLabelStyle("arialbd.ttf");

# Add a Box Whisker layer using light blue 0x9999ff as the fill color and blue (0xcc)
# as the line color. Set the line width to 2 pixels
$c->addBoxLayer($Q4Data, $Q3Data, 0x00ff00, "Top 25%");
$c->addBoxLayer($Q3Data, $Q2Data, 0x9999ff, "25% - 50%");
$c->addBoxLayer($Q2Data, $Q1Data, 0xffff00, "50% - 75%");
$c->addBoxLayer($Q1Data, $Q0Data, 0xff0000, "Bottom 25%");

# Add legend box at top center above the plot area using 10 pts Arial Bold Font
$b = $c->addLegend(50 + 225, 22, false, "arialbd.ttf", 10);
$b->setAlignment(TopCenter);
$b->setBackground(Transparent);

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