51 lines
5.4 KiB
HTML
51 lines
5.4 KiB
HTML
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Formatting text paragraphs</title><link rel="stylesheet" type="text/css" href="manual.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.0"><link rel="home" href="index.html" title="JpGraph Manual"><link rel="up" href="ch08.html" title="Chapter 8. Text and font handling"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Formatting text paragraphs</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center">Chapter 8. Text and font handling</th><td width="20%" align="right"> </td></tr></table><hr></div><div class="sect1" title="Formatting text paragraphs"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2498877"></a>Formatting text paragraphs</h2></div></div></div>
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<p>The text rendering engine within the library offers some basic text paragraph
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formatting.</p>
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<p>
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</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
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<p>It is possible to use multi line text combined as a paragraph</p>
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</li><li class="listitem">
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<p>It is possible to adjust the text alignment within the paragraph to be
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left, right or center adjusted. This works in the same way as you would
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expect in a word-processor.</p>
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</li><li class="listitem">
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<p>If enabled the text rendering will support automatic line breaks at a
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certain column. The line breaks are intelligent not to break words in
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the middle.</p>
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</li></ul></div><p>
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</p>
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<p>All text handling is centralized to the class <code class="code">Text</code> (defined in file
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<code class="filename">jpgraph_text.inc.php</code>) which is used both to add arbitrary
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text to the graph as well as internally within the library to manipulate text on
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labels and titles. All such texts are an instance of the Text class.</p>
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<p>The paragraph alignment is controlled by the method
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<code class="code">Text::SetParagraphAlign($aAlignment)</code>. The argument is a text string
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that should be one of <code class="code">'left'</code>, <code class="code">'right'</code> or
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<code class="code">'center'</code>. </p>
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<p>
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</p><div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3>
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<p>Unfortunately the library does not support an "even" paragraph alignment
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which in word processors adjust the kerning between individual characters to
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make the text have even left and right sides. Implementing this would
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require a much higher complexity than can be motivated for the type of text
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needed in a graph library.</p>
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</div><p>
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</p>
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<p>In the <a class="xref" href="ch08s05.html#fig.textpalignex1" title="Figure 8.5. The different types of paragraph alignments (textpalignex1.php)">Figure 8.5. The different types of paragraph alignments <code class="uri"><a class="uri" href="example_src/textpalignex1.html" target="_top">(<code class="filename">textpalignex1.php</code>)</a></code> </a> the same text paragraph is rendered with the
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possible paragraph alignments.</p>
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<p>
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</p><div class="figure"><a name="fig.textpalignex1"></a><p class="title"><b>Figure 8.5. The different types of paragraph alignments <code class="uri"><a class="uri" href="example_src/textpalignex1.html" target="_top">(<code class="filename">textpalignex1.php</code>)</a></code> </b></p><div class="figure-contents"> <span class="inlinemediaobject"><img src="images/textpalignex1.png" alt="The different types of paragraph alignments (textpalignex1.php)"></span> </div></div><p><br class="figure-break">
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</p>
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<p>Inserting a newline character "\n" in text will cause the text line to break and
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start on the next row. Note that the newline must be surrounded with double-quotes
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and not single quotes.</p>
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<p>
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</p><div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3>
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<p>Bitmap fonts that are rotated, i.e. vertical, does not support automatic
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line breaking. If line breaking is needed with vertical text then one of the
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TTF fonts muts be used.</p>
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</div><p>
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</p>
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</div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"> </td><td width="20%" align="center"><a accesskey="u" href="ch08.html">Up</a></td><td width="40%" align="right"> </td></tr><tr><td width="40%" align="left" valign="top"> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> </td></tr></table></div></body></html>
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