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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><title>Chapter 4. PHPlot Advanced Topics</title><link rel="stylesheet" type="text/css" href="phplotdoc.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="PHPlot Reference Manual" /><link rel="up" href="part1.html" title="Part I. PHPlot Programming" /><link rel="prev" href="conc-errors.html" title="3.9. Error Handling" /><link rel="next" href="adv-serialize.html" title="4.2. PHPlot Object Serialization" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 4. PHPlot Advanced Topics</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="conc-errors.html">Prev</a> </td><th width="60%" align="center">Part I. PHPlot Programming</th><td width="20%" align="right"> <a accesskey="n" href="adv-serialize.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="advanced"></a>Chapter 4. PHPlot Advanced Topics</h2></div></div></div><div class="abstract"><p class="title"><strong></strong></p><p>
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This chapter documents advanced PHPlot programming topics, going beyond the
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material in <a class="xref" href="concepts.html" title="Chapter 3. PHPlot Concepts">Chapter 3, <em>PHPlot Concepts</em></a>.
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</p></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="adv-customclass"></a>4.1. Custom PHPlot Class</h2></div></div></div><div class="abstract"><p class="title"><strong></strong></p><p>
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This section describes how to create a custom PHPlot class.
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</p></div><p>
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If you have a number of applications that use PHPlot, and you want to
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standardize some of the PHPlot default settings, you can define your
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own class which extends the PHPlot class and changes the default settings.
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Here is a short example of a custom PHPlot class, which changes the
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following defaults:
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</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>Use a TrueType font for all text</p></li><li class="listitem"><p>Change the default image size to 800 x 600</p></li><li class="listitem"><p>Change the default title colors to red</p></li></ul></div><p>
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</p><p>
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To extend the PHPlot class, declare your class as shown below. Make sure
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your class constructor calls the PHPlot class constructor before changing
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any settings.
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</p><pre class="programlisting"><?php
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# Define a custom PHPlot class
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// Load the PHPlot class first
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require_once 'phplot.php';
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// Define a class which extends PHPlot:
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class my_phplot extends PHPlot {
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function __construct($width=800, $height=600, $out=NULL, $in=NULL)
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{
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parent::__construct($width, $height, $out, $in);
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$this->SetDefaultTTFont('LiberationSans-Bold'); // System dependent
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$this->SetTitleColor('red');
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}
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}
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</pre><p>
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</p><p>
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To use this custom PHPlot class, use <code class="literal">require_once</code> to
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include the file containing the class definition, then create an instance
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of the custom class.
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</p><pre class="programlisting">$plot = new my_phplot();
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</pre><p>
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You can then use the <code class="literal">$plot</code> object exactly the same as
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you might use any other PHPlot object.
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</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="conc-errors.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="part1.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="adv-serialize.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">3.9. Error Handling </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 4.2. PHPlot Object Serialization</td></tr></table></div></body></html>
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