ChartDirector Ver 5.0 (PHP Edition)

Custom Symbols

This example demonstrates loading external image files as data symbols by using DataSet.setDataSymbol2.

Source Code Listing

[File: phpdemo/customsymbolline.php]

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

    # The data for the chart
    $data0 = array(600, 800, 1200, 1500, 1800, 1900, 2000, 1950);
    $data1 = array(300, 450, 500, 1000, 1500, 1600, 1650, 1600);

    # The labels for the chart
    $labels = array("1995", "1996", "1997", "1998", "1999", "2000", "2001", "2002");

    # Create a XYChart object of size 450 x 250 pixels, with a pale yellow (0xffffc0)
    # background, a black border, and 1 pixel 3D border effect.
    $c = new XYChart(450, 250, 0xffffc0, 0, 1);

    # Set the plotarea at (60, 45) and of size 360 x 170 pixels, using white (0xffffff)
    # as the plot area background color. Turn on both horizontal and vertical grid lines
    # with light grey color (0xc0c0c0)
    $c->setPlotArea(60, 45, 360, 170, 0xffffff, -1, -1, 0xc0c0c0, -1);

    # Add a legend box at (60, 20) (top of the chart) with horizontal layout. Use 8 pts
    # Arial Bold font. Set the background and border color to Transparent.
    $legendObj = $c->addLegend(60, 20, false, "arialbd.ttf", 8);
    $legendObj->setBackground(Transparent);

    # Add a title to the chart using 12 pts Arial Bold/white font. Use a 1 x 2 bitmap
    # pattern as the background.
    $textBoxObj = $c->addTitle("Information Resource Usage", "arialbd.ttf", 12, 0xffffff)
        ;
    $textBoxObj->setBackground($c->patternColor(array(0x000040, 0x000080), 2));

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

    # Reserve 8 pixels margins at both side of the x axis to avoid the first and last
    # symbols drawing outside of the plot area
    $c->xAxis->setMargin(8, 8);

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

    # Add a line layer to the chart
    $layer = $c->addLineLayer2();

    # Add the first line using small_user.png as the symbol.
    $dataSetObj = $layer->addDataSet($data0, 0xcf4040, "Users");
    $dataSetObj->setDataSymbol2(dirname(__FILE__)."/small_user.png");

    # Add the first line using small_computer.png as the symbol.
    $dataSetObj = $layer->addDataSet($data1, 0x40cf40, "Computers");
    $dataSetObj->setDataSymbol2(dirname(__FILE__)."/small_computer.png");

    # Set the line width to 3 pixels
    $layer->setLineWidth(3);

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

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