ChartDirector 7.0 (PHP Edition)

Compact Line Chart




This example extends the Simple Line Chart example by decorating the chart using a number of chart formatting features.

In this example, random data is used. They are generated using a ChartDirector utility class RanTable. RanTable simulates a database table with the cells filled with random numbers. The columns of the table can be retrieved as arrays using RanTable.getCol.

Source Code Listing

[File: phpdemo/compactline.php]
<?php require_once("../lib/phpchartdir.php"); # # We use a random number generator to simulate the data from 9:30am to 4:30pm with one data point # every 4 minutes. The total number of points during that period is 106. (7 hours x 15 # points/hour + 1) # $noOfPoints = 106; # Assume we have not reached the end of the day yet, and only 85 points are available. Create a # random table object of 1 col x 85 rows, using 9 as seed. $rantable = new RanTable(9, 1, 85); # Set the 1st column to start with 1800 and with random delta from -5 to 5. $rantable->setCol(0, 1800, -5, 5); # Get the data as the 1st column of the random table $data = $rantable->getCol(0); # The x-axis labels for the chart $labels = array("-", "10am", "-", " ", "-", "12am", "-", " ", "-", "2pm", "-", " ", "-", "4pm", "-") ; # # Now we obtain the data into arrays, we can start to draw the chart using ChartDirector # # Create a XYChart object of size 180 x 180 pixels with a blue background (0x9c9cce) $c = new XYChart(180, 180, 0x9c9cce); # Add titles to the top and bottom of the chart using 7.5pt Arial font. The text is white 0xffffff # on a deep blue 0x31319C background. $c->addTitle2(Top, "STAR TECH INDEX 2003-01-28", "Arial", 7.5, 0xffffff, 0x31319c); $c->addTitle2(Bottom, "LATEST STI:1809.41 (+14.51)", "Arial", 7.5, 0xffffff, 0x31319c); # Set the plotarea at (31, 21) and of size 145 x 124 pixels, with a pale yellow (0xffffc8) # background. $c->setPlotArea(31, 21, 145, 124, 0xffffc8); # Add custom text at (176, 21) (top right corner of plotarea) using 11pt Times Bold Italic font/red # (0xc09090) color $c->addText(176, 21, "Chart Demo", "Times New Roman Bold Italic", 11, 0xc09090)->setAlignment( TopRight); # Use 7.5pt Arial as the y axis label font $c->yAxis->setLabelStyle("", 7.5); # Set the labels on the x axis by spreading the labels evenly between the first point (index = 0) # and the last point (index = noOfPoints - 1) $c->xAxis->setLinearScale(0, $noOfPoints - 1, $labels); # Use 7.5pt Arial as the x axis label font $c->xAxis->setLabelStyle("", 7.5); # Add a deep blue (0x000080) line layer to the chart $c->addLineLayer($data, 0x000080); # Output the chart $viewer = new WebChartViewer("chart1"); $viewer->setChart($c, SVG); # Include tool tip for the chart. The chart starts at 9:30am and each point spans 240 seconds, so we # can compute the time as {x}*240+9.5*3600. $viewer->setImageMap($c->getHTMLImageMap("", "", "title='{={x}*240+9.5*3600|h:nna}: {value|2}'")); ?> <!DOCTYPE html> <html> <head> <title>Compact 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;"> Compact 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>