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

# The data for the bar chart
$data = array(-6.3, 2.3, 0.7, -3.4, 2.2, -2.9, -0.1, -0.1, 3.3, 6.2, 4.3, 1.6);

# The labels for the bar chart
$labels = array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct",
    "Nov", "Dec");

# Create a XYChart object of size 500 x 320 pixels
$c = new XYChart(500, 320);

# Add a title to the chart using Arial Bold Italic font
$c->addTitle("Productivity Change - Year 2005", "arialbi.ttf");

# Set the plotarea at (50, 30) and of size 400 x 250 pixels
$c->setPlotArea(50, 30, 400, 250);

# Add a bar layer to the chart using the Overlay data combine method
$layer = $c->addBarLayer2(Overlay);

# Select positive data and add it as data set with blue (6666ff) color
$tmpArrayMath1 = new ArrayMath($data);
$tmpArrayMath1->selectGEZ(null, NoValue);
$layer->addDataSet($tmpArrayMath1->result(), 0x6666ff);

# Select negative data and add it as data set with orange (ff6600) color
$tmpArrayMath1 = new ArrayMath($data);
$tmpArrayMath1->selectLTZ(null, NoValue);
$layer->addDataSet($tmpArrayMath1->result(), 0xff6600);

# Add labels to the top of the bar using 8 pt Arial Bold font. The font color is
# configured to be red (0xcc3300) below zero, and blue (0x3333ff) above zero.
$layer->setAggregateLabelStyle("arialbd.ttf", 8, $layer->yZoneColor(0, 0xcc3300,
    0x3333ff));

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

# Draw the y axis on the right of the plot area
$c->setYAxisOnRight(true);

# Use Arial Bold as the y axis label font
$c->yAxis->setLabelStyle("arialbd.ttf");

# Add a title to the y axis
$c->yAxis->setTitle("Percentage");

# Add a light blue (0xccccff) zone for positive part of the plot area
$c->yAxis->addZone(0, 9999, 0xccccff);

# Add a pink (0xffffcc) zone for negative part of the plot area
$c->yAxis->addZone(-9999, 0, 0xffcccc);

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