ChartDirector Ver 5.0 (PHP Edition)

Multi-Line Chart

This example demonstrates a chart with multiple lines of different styles. It also demonstrates using frame with rounded corners, title with glass shading effect, both vertical and horizontal grid lines, and a legend at the top of the plot area.

- The rounded frame is configured using BaseChart.setRoundedFrame.
- The glass shading effect of the title is defined using glassEffect, then applied to the title using Box.setBackground of the title TextBox object.
- Enable both vertical and horizontal grid lines using XYChart.setPlotArea.
- Add a legend at the top of the chart using BaseChart.addLegend.
- Add an empty line layer using XYChart.addLineLayer2
- Add multiple data sets to the line layer using Layer.addDataSet.
- For the last line, the line color is a dash line color creating using BaseChart.dashLineColor.
- Set the line width for all lines in the layer using Layer.setLineWidth. (To set the line width for one particular line, use DataSet.setLineWidth.)

Source Code Listing

[File: phpdemo/multiline.php]

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

    # The data for the line chart
    $data0 = array(42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56,
        60, 70, 76, 63, 67, 75, 64, 51);
    $data1 = array(50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58,
        59, 73, 77, 84, 82, 80, 84, 98);
    $data2 = array(36, 28, 25, 33, 38, 20, 22, 30, 25, 33, 30, 24, 28, 15, 21, 26, 46,
        42, 48, 45, 43, 52, 64, 60, 70);

    # The labels for the line chart
    $labels = array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
        "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24");

    # Create an XYChart object of size 600 x 300 pixels, with a light blue (EEEEFF)
    # background, black border, 1 pxiel 3D border effect and rounded corners
    $c = new XYChart(600, 300, 0xeeeeff, 0x000000, 1);
    $c->setRoundedFrame();

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

    # Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 9 pts
    # Arial Bold font. Set the background and border color to Transparent.
    $legendObj = $c->addLegend(50, 30, false, "arialbd.ttf", 9);
    $legendObj->setBackground(Transparent);

    # Add a title box to the chart using 15 pts Times Bold Italic font, on a light blue
    # (CCCCFF) background with glass effect. white (0xffffff) on a dark red (0x800000)
    # background, with a 1 pixel 3D border.
    $textBoxObj = $c->addTitle("Application Server Throughput", "timesbi.ttf", 15);
    $textBoxObj->setBackground(0xccccff, 0x000000, glassEffect());

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

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

    # Display 1 out of 3 labels on the x-axis.
    $c->xAxis->setLabelStep(3);

    # Add a title to the x axis
    $c->xAxis->setTitle("Jun 12, 2006");

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

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

    # Add the three data sets to the line layer. For demo purpose, we use a dash line
    # color for the last line
    $layer->addDataSet($data0, 0xff0000, "Server #1");
    $layer->addDataSet($data1, 0x008800, "Server #2");
    $layer->addDataSet($data2, $c->dashLineColor(0x3333ff, DashLine), "Server #3");

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

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