ChartDirector 7.0 (PHP Edition)

Spline Line Chart




This example demonstrates using spline curves to join data points, title with soft lighting effect, as well as a number of chart formatting techniques.

Source Code Listing

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

# The data for the chart
$data0 = array(32, 39, 23, 28, 41, 38, 26, 35, 29);
$data1 = array(50, 55, 47, 34, 47, 53, 38, 40, 51);

# The labels for the chart
$labels = array("0", "1", "2", "3", "4", "5", "6", "7", "8");

# Create a XYChart object of size 600 x 300 pixels, with a pale red (ffdddd) background, black
# border, 1 pixel 3D border effect and rounded corners.
$c = new XYChart(600, 300, 0xffdddd, 0x000000, 1);
$c->setRoundedFrame();

# Set directory for loading images to current script directory
# Need when running under Microsoft IIS
$c->setSearchPath(dirname(__FILE__));

# Set the plotarea at (55, 58) and of size 520 x 195 pixels, with white (ffffff) background. Set
# horizontal and vertical grid lines to grey (cccccc).
$c->setPlotArea(55, 58, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);

# Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial Bold font.
# Set the background and border color to Transparent.
$c->addLegend(55, 32, false, "Arial Bold", 9)->setBackground(Transparent);

# Add a title box to the chart using 15pt Times Bold Italic font. The title is in CDML and includes
# embedded images for highlight. The text is white (ffffff) on a dark red (880000) background, with
# soft lighting effect from the right side.
$c->addTitle(
    "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance Enhancer ".
    "<*img=star.png*><*img=star.png*><*/*>", "Times New Roman Bold Italic", 15, 0xffffff
    )->setBackground(0x880000, -1, softLighting(Right));

# Add a title to the y axis
$c->yAxis->setTitle("Energy Concentration (KJ per liter)");

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

# Add a title to the x axis using CMDL
$c->xAxis->setTitle("<*block,valign=absmiddle*><*img=clock.png*>  Elapsed Time (hour)<*/*>");

# Set the axes width to 2 pixels
$c->xAxis->setWidth(2);
$c->yAxis->setWidth(2);

# Add a spline layer to the chart
$layer = $c->addSplineLayer();

# Set the default line width to 2 pixels
$layer->setLineWidth(2);

# Add a data set to the spline layer, using blue (0000c0) as the line color, with yellow (ffff00)
# circle symbols.
$layer->addDataSet($data1, 0x0000c0, "Target Group")->setDataSymbol(CircleSymbol, 9, 0xffff00);

# Add a data set to the spline layer, using brown (982810) as the line color, with pink (f040f0)
# diamond symbols.
$layer->addDataSet($data0, 0x982810, "Control Group")->setDataSymbol(DiamondSymbol, 11, 0xf040f0);

# Add a custom CDML text at the bottom right of the plot area as the logo
$c->addText(575, 250,
    "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*><*font=Times New Roman Bold ".
    "Italic,size=10,color=804040*>Molecular\nEngineering<*/*>")->setAlignment(BottomRight);

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

# Include tool tip for the chart
$viewer->setImageMap($c->getHTMLImageMap("", "",
    "title='{dataSetName} at t = {xLabel} hour: {value} KJ/liter'"));
?>

<!DOCTYPE html>
<html>
<head>
    <title>Spline Line Chart</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;">
        Spline Line Chart
    </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>