Bar Labels

This example extends the Simple Bar Chart (1) example by including bar labels on the bars, and decorating the bars with rounded corners and gradient shading.

Use Layer.setAggregateLabelStyle to include labels on top of the bars. There is an alternative method Layer.setDataLabelStyle for including the labels inside the bars.
Use BarLayer.setRoundedCorners to configure the bars to have rounded corners.
Use Layer.setBorderColor with barLighting to apply a gradient shading effect to the bars.

[File: phpdemo/barlabel.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");

# 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", 12);
$c->yAxis->setLabelStyle("Arial", 12);

# Add a blue (0x6699bb) bar chart layer using the given data
$layer = $c->addBarLayer($data, 0x6699bb);

# Use bar gradient lighting with the light intensity from 0.8 to 1.3
$layer->setBorderColor(Transparent, barLighting(0.8, 1.3));

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

# Display labela on top of bars using 12pt Arial font
$layer->setAggregateLabelStyle("Arial", 12);

# 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 Bold font
$c->yAxis->setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, 0x555555);

# Output the chart
$viewer = new WebChartViewer("chart1");
$viewer->setChart($c, SVG);

# Include tool tip for the chart
$viewer->setImageMap($c->getHTMLImageMap("", "", "title='{xLabel}: \${value}M'"));
?>

<!DOCTYPE html>
<html>
<head>
    <title>Bar Labels</title>
    <!-- Include ChartDirector Javascript Library to support chart interactions -->
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        Bar Labels
    </div>
    <hr style="border:solid 1px #000080; background:#000080" />
    <div style="font:10pt verdana; margin-bottom:1.5em">
        <a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a>
    </div>
    <!-- ****** Here is the chart image ****** -->
    <?php echo $viewer->renderHTML(); ?>
</body>
</html>