doc/html/ntqimageformatplugin.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qimageformatplugin.cpp:41 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>TQImageFormatPlugin Class</title>
<style type="text/css"><!--
fn { margin-left: 1cm; text-indent: -1cm; }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
body { background: #ffffff; color: black; }
--></style>
</head>
<body>

<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr bgcolor="#E5E5E5">
<td valign=center>
 <a href="index.html">
<font color="#004faf">Home</font></a>
 | <a href="classes.html">
<font color="#004faf">All&nbsp;Classes</font></a>
 | <a href="mainclasses.html">
<font color="#004faf">Main&nbsp;Classes</font></a>
 | <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
 | <a href="groups.html">
<font color="#004faf">Grouped&nbsp;Classes</font></a>
 | <a href="functions.html">
<font color="#004faf">Functions</font></a>
</td>
<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQImageFormatPlugin Class Reference</h1>

<p>The TQImageFormatPlugin class provides an abstract base for custom image format plugins.
<a href="#details">More...</a>
<p><tt>#include &lt;<a href="qimageformatplugin-h.html">ntqimageformatplugin.h</a>&gt;</tt>
<p><a href="qimageformatplugin-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li class=fn><a href="#TQImageFormatPlugin"><b>TQImageFormatPlugin</b></a> ()</li>
<li class=fn><a href="#~TQImageFormatPlugin"><b>~TQImageFormatPlugin</b></a> ()</li>
<li class=fn>virtual TQStringList <a href="#keys"><b>keys</b></a> () const = 0</li>
<li class=fn>virtual bool <a href="#installIOHandler"><b>installIOHandler</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;format ) = 0</li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>


The TQImageFormatPlugin class provides an abstract base for custom image format plugins.
<p> 
<p> The image format plugin is a simple plugin interface that makes
it easy to create custom image formats that can be used
transparently by applications.
<p> Writing an image format plugin is achieved by subclassing this
base class, reimplementing the pure virtual functions <a href="#keys">keys</a>() and
<a href="#installIOHandler">installIOHandler</a>(), and exporting the class with the
TQ_EXPORT_PLUGIN macro.  See the <a href="plugins-howto.html">Plugins
    documentation</a> for details.
<p>See also <a href="plugins.html">Plugins</a>.

<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="TQImageFormatPlugin"></a>TQImageFormatPlugin::TQImageFormatPlugin ()
</h3>
Constructs an image format plugin. This is invoked automatically
by the TQ_EXPORT_PLUGIN macro.

<h3 class=fn><a name="~TQImageFormatPlugin"></a>TQImageFormatPlugin::~TQImageFormatPlugin ()
</h3>
Destroys the image format plugin.
<p> You never have to call this explicitly. TQt destroys a plugin
automatically when it is no longer used.

<h3 class=fn>bool <a name="installIOHandler"></a>TQImageFormatPlugin::installIOHandler ( const&nbsp;<a href="ntqstring.html">TQString</a>&nbsp;&amp;&nbsp;format )<tt> [pure virtual]</tt>
</h3>

<p> Installs a <a href="qimageio.html">TQImageIO</a> image I/O handler for the image format <em>format</em>.
<p> <p>See also <a href="#keys">keys</a>().

<h3 class=fn><a href="ntqstringlist.html">TQStringList</a> <a name="keys"></a>TQImageFormatPlugin::keys () const<tt> [pure virtual]</tt>
</h3>

<p> Returns the list of image formats this plugin supports.
<p> <p>See also <a href="#installIOHandler">installIOHandler</a>().

<!-- eof -->
<hr><p>
This file is part of the <a href="index.html">TQt toolkit</a>.
Copyright &copy; 1995-2007
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright &copy; 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>TQt 3.3.8</div>
</table></div></address></body>
</html>