Background and Wallpaper

This example demonstrates some of the background effects supported by ChartDirector.

ChartDirector supports using an image file as the wallpaper of the chart image background with BaseChart.setWallpaper, and as the plot area background with PlotArea.setBackground2.

In addition to wallpapers, ChartDirector supports alternating plot area background colors using PlotArea.setBackground and PlotArea.setAltBgColor.

You can switch the default colors to using a dark background with white lines and text in one step by changing the color palette to a whiteOnBlackPalette using BaseChart.setColors.

[File: phpdemo/background.php]

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

function createChart($viewer, $chartIndex)
{
    # The data for the chart
    $data = array(85, 156, 179.5, 211, 123);
    $labels = array("Mon", "Tue", "Wed", "Thu", "Fri");

    # Create a XYChart object of size 270 x 270 pixels
    $c = new XYChart(270, 270);

    # Set the plot area at (40, 32) and of size 200 x 200 pixels
    $plotarea = $c->setPlotArea(40, 32, 200, 200);

    # Set the background style based on the input parameter
    if ($chartIndex == 0) {
        # Has wallpaper image
        $c->setWallpaper(dirname(__FILE__)."/tile.png");
    } else if ($chartIndex == 1) {
        # Use a background image as the plot area background
        $plotarea->setBackground2(dirname(__FILE__)."/bg.png");
    } else if ($chartIndex == 2) {
        # Use white (0xffffff) and grey (0xe0e0e0) as two alternate plotarea background colors
        $plotarea->setBackground(0xffffff, 0xe0e0e0);
    } else {
        # Use a dark background palette
        $c->setColors(whiteOnBlackPalette());
    }

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

    # Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
    $c->addBarLayer3($data)->setBorderColor(-1, 1);

    # Output the chart
    $viewer->setChart($c, SVG);

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

# This example includes 4 charts
$viewers = array();
for ($i = 0; $i < 4; ++$i) {
    $viewers[$i] = new WebChartViewer("chart$i");
    createChart($viewers[$i], $i);
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Background and Wallpaper</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;">
        Background and Wallpaper
    </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 are the chart images ****** -->
    <?php
        for ($i = 0; $i < count($viewers); ++$i) {
            echo $viewers[$i]->renderHTML(), " ";
        }
    ?>
</body>
</html>