ChartDirector 6.1 (PHP Edition)

Multi-Color Bar Chart (2)




This example extends the Multi-Color Bar Chart (1) example by decorating the the bars with rounded corners and gradient shading.

Source Code Listing

[File: phpdemo/colorbar2.php]
<?php
require_once("../lib/phpchartdir.php");

# The data for the bar chart
$data = array(85, 156, 179, 211, 123, 189, 166);

# The labels for the bar chart
$labels = array("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun");

# The colors for the bars
$colors = array(0x5588bb, 0x66bbbb, 0xaa6644, 0x99bb55, 0xee9944, 0x444466, 0xbb5555);

# Create a XYChart object of size 600 x 360 pixels
$c = new XYChart(600, 360);

# Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and border
# and light grey (0xcccccc) horizontal grid lines
$c->setPlotArea(70, 20, 500, 300, Transparent, -1, Transparent, 0xcccccc);

# Set the x and y axis stems to transparent and the label font to 12pt Arial
$c->xAxis->setColors(Transparent);
$c->yAxis->setColors(Transparent);
$c->xAxis->setLabelStyle("arial.ttf", 12);
$c->yAxis->setLabelStyle("arial.ttf", 12);

# Add a multi-color bar chart layer using the given data
$layer = $c->addBarLayer3($data, $colors);

# Use bar gradient lighting with the light intensity from 0.8 to 1.15
$layer->setBorderColor(Transparent, barLighting(0.8, 1.15));

# Set rounded corners for bars
$layer->setRoundedCorners();

# Set the labels on the x axis.
$c->xAxis->setLabels($labels);

# For the automatic y-axis labels, set the minimum spacing to 40 pixels.
$c->yAxis->setTickDensity(40);

# Add a title to the y axis using dark grey (0x555555) 14pt Arial font
$c->yAxis->setTitle("Y-Axis Title Placeholder", "arial.ttf", 14, 0x555555);

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