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| 2 | <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qmime.cpp:179 -->
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| 6 | <title>QMimeSourceFactory Class</title>
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| 24 | <font color="#004faf">Main Classes</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QMimeSourceFactory Class Reference</h1>
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| 33 |
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| 34 | <p>The QMimeSourceFactory class is an extensible provider of mime-typed data.
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| 35 | <a href="#details">More...</a>
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| 36 | <p><tt>#include <<a href="qmime-h.html">qmime.h</a>></tt>
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| 37 | <p><a href="qmimesourcefactory-members.html">List of all member functions.</a>
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| 38 | <h2>Public Members</h2>
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| 39 | <ul>
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| 40 | <li class=fn><a href="#QMimeSourceFactory"><b>QMimeSourceFactory</b></a> ()</li>
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| 41 | <li class=fn>virtual <a href="#~QMimeSourceFactory"><b>~QMimeSourceFactory</b></a> ()</li>
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| 42 | <li class=fn>virtual const QMimeSource * <a href="#data"><b>data</b></a> ( const QString & abs_name ) const</li>
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| 43 | <li class=fn>virtual QString <a href="#makeAbsolute"><b>makeAbsolute</b></a> ( const QString & abs_or_rel_name, const QString & context ) const</li>
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| 44 | <li class=fn>const QMimeSource * <a href="#data-2"><b>data</b></a> ( const QString & abs_or_rel_name, const QString & context ) const</li>
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| 45 | <li class=fn>virtual void <a href="#setText"><b>setText</b></a> ( const QString & abs_name, const QString & text )</li>
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| 46 | <li class=fn>virtual void <a href="#setImage"><b>setImage</b></a> ( const QString & abs_name, const QImage & image )</li>
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| 47 | <li class=fn>virtual void <a href="#setPixmap"><b>setPixmap</b></a> ( const QString & abs_name, const QPixmap & pixmap )</li>
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| 48 | <li class=fn>virtual void <a href="#setData"><b>setData</b></a> ( const QString & abs_name, QMimeSource * data )</li>
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| 49 | <li class=fn>virtual void <a href="#setFilePath"><b>setFilePath</b></a> ( const QStringList & path )</li>
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| 50 | <li class=fn>virtual QStringList <a href="#filePath"><b>filePath</b></a> () const</li>
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| 51 | <li class=fn>void <a href="#addFilePath"><b>addFilePath</b></a> ( const QString & p )</li>
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| 52 | <li class=fn>virtual void <a href="#setExtensionType"><b>setExtensionType</b></a> ( const QString & ext, const char * mimetype )</li>
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| 53 | </ul>
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| 54 | <h2>Static Public Members</h2>
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| 55 | <ul>
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| 56 | <li class=fn>QMimeSourceFactory * <a href="#defaultFactory"><b>defaultFactory</b></a> ()</li>
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| 57 | <li class=fn>void <a href="#setDefaultFactory"><b>setDefaultFactory</b></a> ( QMimeSourceFactory * factory )</li>
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| 58 | <li class=fn>QMimeSourceFactory * <a href="#takeDefaultFactory"><b>takeDefaultFactory</b></a> ()</li>
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| 59 | <li class=fn>void <a href="#addFactory"><b>addFactory</b></a> ( QMimeSourceFactory * f )</li>
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| 60 | <li class=fn>void <a href="#removeFactory"><b>removeFactory</b></a> ( QMimeSourceFactory * f )</li>
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| 61 | </ul>
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| 62 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 63 |
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| 64 |
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| 65 | The QMimeSourceFactory class is an extensible provider of mime-typed data.
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| 66 | <p>
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| 67 |
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| 68 | <p> A QMimeSourceFactory provides an abstract interface to a
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| 69 | collection of information. Each piece of information is
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| 70 | represented by a <a href="qmimesource.html">QMimeSource</a> object which can be examined and
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| 71 | converted to concrete data types by functions such as
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| 72 | <a href="qimagedrag.html#canDecode">QImageDrag::canDecode</a>() and <a href="qimagedrag.html#decode">QImageDrag::decode</a>().
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| 73 | <p> The base QMimeSourceFactory can be used in two ways: as an
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| 74 | abstraction of a collection of files or as specifically stored
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| 75 | data. For it to access files, call <a href="#setFilePath">setFilePath</a>() before accessing
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| 76 | data. For stored data, call <a href="#setData">setData</a>() for each item (there are
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| 77 | also convenience functions, e.g. <a href="#setText">setText</a>(), <a href="#setImage">setImage</a>() and
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| 78 | <a href="#setPixmap">setPixmap</a>(), that simply call setData() with appropriate
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| 79 | parameters).
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| 80 | <p> The rich text widgets, <a href="qtextedit.html">QTextEdit</a> and <a href="qtextbrowser.html">QTextBrowser</a>, use
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| 81 | QMimeSourceFactory to resolve references such as images or links
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| 82 | within rich text documents. They either access the default factory
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| 83 | (see <a href="#defaultFactory">defaultFactory</a>()) or their own (see
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| 84 | <a href="qtextedit.html#setMimeSourceFactory">QTextEdit::setMimeSourceFactory</a>()). Other classes that are
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| 85 | capable of displaying rich text (such as <a href="qlabel.html">QLabel</a>, <a href="qwhatsthis.html">QWhatsThis</a> or
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| 86 | <a href="qmessagebox.html">QMessageBox</a>) always use the default factory.
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| 87 | <p> A factory can also be used as a container to store data associated
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| 88 | with a name. This technique is useful whenever rich text contains
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| 89 | images that are stored in the program itself, not loaded from the
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| 90 | hard disk. Your program may, for example, define some image data
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| 91 | as:
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| 92 | <pre>
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| 93 | static const char* myimage_data[]={
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| 94 | "...",
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| 95 | ...
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| 96 | "..."};
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| 97 | </pre>
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| 98 |
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| 99 | <p> To be able to use this image within some rich text, for example
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| 100 | inside a QLabel, you must create a <a href="qimage.html">QImage</a> from the raw data and
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| 101 | insert it into the factory with a unique name:
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| 102 | <pre>
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| 103 | QMimeSourceFactory::<a href="#defaultFactory">defaultFactory</a>()->setImage( "myimage", QImage(myimage_data) );
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| 104 | </pre>
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| 105 |
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| 106 | <p> Now you can create a rich text QLabel with
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| 107 | <p> <pre>
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| 108 | <a href="qlabel.html">QLabel</a>* label = new <a href="qlabel.html">QLabel</a>(
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| 109 | "Rich text with embedded image:<img source=\"myimage\">"
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| 110 | "Isn't that <em>cute</em>?" );
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| 111 | </pre>
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| 112 |
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| 113 | <p> When no longer needed, you can clear the data from the factory:
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| 114 | <p> <pre>
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| 115 | delete label;
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| 116 | QMimeSourceFactory::<a href="#defaultFactory">defaultFactory</a>()->setData( "myimage", 0 );
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| 117 | </pre>
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| 118 |
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| 119 | <p>See also <a href="environment.html">Environment Classes</a> and <a href="io.html">Input/Output and Networking</a>.
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| 120 |
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| 121 | <hr><h2>Member Function Documentation</h2>
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| 122 | <h3 class=fn><a name="QMimeSourceFactory"></a>QMimeSourceFactory::QMimeSourceFactory ()
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| 123 | </h3>
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| 124 | Constructs a QMimeSourceFactory that has no file path and no
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| 125 | stored content.
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| 126 |
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| 127 | <h3 class=fn><a name="~QMimeSourceFactory"></a>QMimeSourceFactory::~QMimeSourceFactory ()<tt> [virtual]</tt>
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| 128 | </h3>
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| 129 | Destroys the QMimeSourceFactory, deleting all stored content.
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| 130 |
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| 131 | <h3 class=fn>void <a name="addFactory"></a>QMimeSourceFactory::addFactory ( <a href="qmimesourcefactory.html">QMimeSourceFactory</a> * f )<tt> [static]</tt>
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| 132 | </h3>
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| 133 | Adds the QMimeSourceFactory <em>f</em> to the list of available
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| 134 | mimesource factories. If the <a href="#defaultFactory">defaultFactory</a>() can't resolve a
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| 135 | <a href="#data">data</a>() it iterates over the list of installed mimesource factories
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| 136 | until the data can be resolved.
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| 137 | <p> <p>See also <a href="#removeFactory">removeFactory</a>().
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| 138 |
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| 139 | <h3 class=fn>void <a name="addFilePath"></a>QMimeSourceFactory::addFilePath ( const <a href="qstring.html">QString</a> & p )
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| 140 | </h3>
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| 141 | Adds another search path, <em>p</em> to the existing search paths.
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| 142 | <p> <p>See also <a href="#setFilePath">setFilePath</a>().
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| 143 |
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| 144 | <h3 class=fn>const <a href="qmimesource.html">QMimeSource</a> * <a name="data"></a>QMimeSourceFactory::data ( const <a href="qstring.html">QString</a> & abs_name ) const<tt> [virtual]</tt>
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| 145 | </h3>
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| 146 | Returns a reference to the data associated with <em>abs_name</em>. The
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| 147 | return value remains valid only until the next <a href="#data">data</a>() or <a href="#setData">setData</a>()
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| 148 | call, so you should immediately decode the result.
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| 149 | <p> If there is no data associated with <em>abs_name</em> in the factory's
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| 150 | store, the factory tries to access the local filesystem. If <em>abs_name</em> isn't an absolute file name, the factory will search for
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| 151 | it in all defined paths (see <a href="#setFilePath">setFilePath</a>()).
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| 152 | <p> The factory understands all the image formats supported by
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| 153 | <a href="qimageio.html">QImageIO</a>. Any other mime types are determined by the file name
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| 154 | extension. The default settings are
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| 155 | <pre>
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| 156 | <a href="#setExtensionType">setExtensionType</a>("html", "text/html;charset=iso8859-1");
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| 157 | <a href="#setExtensionType">setExtensionType</a>("htm", "text/html;charset=iso8859-1");
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| 158 | <a href="#setExtensionType">setExtensionType</a>("txt", "text/plain");
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| 159 | <a href="#setExtensionType">setExtensionType</a>("xml", "text/xml;charset=UTF-8");
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| 160 | </pre>
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| 161 |
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| 162 | The effect of these is that file names ending in "txt" will be
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| 163 | treated as text encoded in the local encoding; those ending in
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| 164 | "xml" will be treated as text encoded in Unicode UTF-8 encoding.
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| 165 | The text/html type is treated specially, since the encoding can be
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| 166 | specified in the html file itself. "html" or "htm" will be treated
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| 167 | as text encoded in the encoding specified by the html meta tag, if
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| 168 | none could be found, the charset of the mime type will be used.
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| 169 | The text subtype ("html", "plain", or "xml") does not affect the
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| 170 | factory, but users of the factory may behave differently. We
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| 171 | recommend creating "xml" files where practical. These files can be
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| 172 | viewed regardless of the runtime encoding and can encode any
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| 173 | Unicode characters without resorting to encoding definitions
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| 174 | inside the file.
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| 175 | <p> Any file data that is not recognized will be retrieved as a
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| 176 | <a href="qmimesource.html">QMimeSource</a> providing the "application/octet-stream" mime type,
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| 177 | meaning uninterpreted binary data.
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| 178 | <p> You can add further extensions or change existing ones with
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| 179 | subsequent calls to <a href="#setExtensionType">setExtensionType</a>(). If the extension mechanism
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| 180 | is not sufficient for your problem domain, you can inherit
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| 181 | QMimeSourceFactory and reimplement this function to perform some
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| 182 | more specialized mime-type detection. The same applies if you want
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| 183 | to use the mime source factory to access URL referenced data over
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| 184 | a network.
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| 185 |
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| 186 | <h3 class=fn>const <a href="qmimesource.html">QMimeSource</a> * <a name="data-2"></a>QMimeSourceFactory::data ( const <a href="qstring.html">QString</a> & abs_or_rel_name, const <a href="qstring.html">QString</a> & context ) const
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| 187 | </h3>
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| 188 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 189 | <p> A convenience function. See <a href="#data">data</a>(const <a href="qstring.html">QString</a>& abs_name). The
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| 190 | file name is given in <em>abs_or_rel_name</em> and the path is in <em>context</em>.
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| 191 |
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| 192 | <h3 class=fn><a href="qmimesourcefactory.html">QMimeSourceFactory</a> * <a name="defaultFactory"></a>QMimeSourceFactory::defaultFactory ()<tt> [static]</tt>
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| 193 | </h3>
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| 194 | Returns the application-wide default mime source factory. This
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| 195 | factory is used by rich text rendering classes such as
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| 196 | <a href="qsimplerichtext.html">QSimpleRichText</a>, <a href="qwhatsthis.html">QWhatsThis</a> and <a href="qmessagebox.html">QMessageBox</a> to resolve named
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| 197 | references within rich text documents. It serves also as the
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| 198 | initial factory for the more complex render widgets, <a href="qtextedit.html">QTextEdit</a> and
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| 199 | <a href="qtextbrowser.html">QTextBrowser</a>.
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| 200 | <p> <p>See also <a href="#setDefaultFactory">setDefaultFactory</a>().
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| 201 |
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| 202 | <p>Examples: <a href="qaction-application-example.html#x1140">action/application.cpp</a> and <a href="simple-application-example.html#x1558">application/application.cpp</a>.
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| 203 | <h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="filePath"></a>QMimeSourceFactory::filePath () const<tt> [virtual]</tt>
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| 204 | </h3>
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| 205 | Returns the currently set search paths.
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| 206 |
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| 207 | <h3 class=fn><a href="qstring.html">QString</a> <a name="makeAbsolute"></a>QMimeSourceFactory::makeAbsolute ( const <a href="qstring.html">QString</a> & abs_or_rel_name, const <a href="qstring.html">QString</a> & context ) const<tt> [virtual]</tt>
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| 208 | </h3>
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| 209 | Converts the absolute or relative data item name <em>abs_or_rel_name</em> to an absolute name, interpreted within the
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| 210 | context (path) of the data item named <em>context</em> (this must be an
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| 211 | absolute name).
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| 212 |
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| 213 | <h3 class=fn>void <a name="removeFactory"></a>QMimeSourceFactory::removeFactory ( <a href="qmimesourcefactory.html">QMimeSourceFactory</a> * f )<tt> [static]</tt>
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| 214 | </h3>
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| 215 | Removes the mimesource factory <em>f</em> from the list of available
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| 216 | mimesource factories.
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| 217 | <p> <p>See also <a href="#addFactory">addFactory</a>().
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| 218 |
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| 219 | <h3 class=fn>void <a name="setData"></a>QMimeSourceFactory::setData ( const <a href="qstring.html">QString</a> & abs_name, <a href="qmimesource.html">QMimeSource</a> * data )<tt> [virtual]</tt>
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| 220 | </h3>
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| 221 | Sets <em>data</em> to be the data item associated with
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| 222 | the absolute name <em>abs_name</em>. Note that the ownership of <em>data</em> is
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| 223 | transferred to the factory: do not delete or access the pointer after
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| 224 | passing it to this function.
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| 225 | <p> Passing 0 for data removes previously stored data.
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| 226 |
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| 227 | <h3 class=fn>void <a name="setDefaultFactory"></a>QMimeSourceFactory::setDefaultFactory ( <a href="qmimesourcefactory.html">QMimeSourceFactory</a> * factory )<tt> [static]</tt>
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| 228 | </h3>
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| 229 | Sets the default <em>factory</em>, destroying any previously set mime
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| 230 | source provider. The ownership of the factory is transferred to
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| 231 | Qt.
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| 232 | <p> <p>See also <a href="#defaultFactory">defaultFactory</a>().
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| 233 |
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| 234 | <h3 class=fn>void <a name="setExtensionType"></a>QMimeSourceFactory::setExtensionType ( const <a href="qstring.html">QString</a> & ext, const char * mimetype )<tt> [virtual]</tt>
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| 235 | </h3>
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| 236 | Sets the mime-type to be associated with the file name extension,
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| 237 | <em>ext</em> to <em>mimetype</em>. This determines the mime-type for files
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| 238 | found via the paths set by <a href="#setFilePath">setFilePath</a>().
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| 239 |
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| 240 | <h3 class=fn>void <a name="setFilePath"></a>QMimeSourceFactory::setFilePath ( const <a href="qstringlist.html">QStringList</a> & path )<tt> [virtual]</tt>
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| 241 | </h3>
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| 242 | Sets the list of directories that will be searched when named data
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| 243 | is requested to the those given in the string list <em>path</em>.
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| 244 | <p> <p>See also <a href="#filePath">filePath</a>().
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| 245 |
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| 246 | <h3 class=fn>void <a name="setImage"></a>QMimeSourceFactory::setImage ( const <a href="qstring.html">QString</a> & abs_name, const <a href="qimage.html">QImage</a> & image )<tt> [virtual]</tt>
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| 247 | </h3>
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| 248 | Sets <em>image</em> to be the data item associated with the absolute
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| 249 | name <em>abs_name</em>.
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| 250 | <p> Equivalent to <a href="#setData">setData</a>(abs_name, new <a href="qimagedrag.html">QImageDrag</a>(image)).
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| 251 |
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| 252 | <h3 class=fn>void <a name="setPixmap"></a>QMimeSourceFactory::setPixmap ( const <a href="qstring.html">QString</a> & abs_name, const <a href="qpixmap.html">QPixmap</a> & pixmap )<tt> [virtual]</tt>
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| 253 | </h3>
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| 254 | Sets <em>pixmap</em> to be the data item associated with the absolute
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| 255 | name <em>abs_name</em>.
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| 256 |
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| 257 | <h3 class=fn>void <a name="setText"></a>QMimeSourceFactory::setText ( const <a href="qstring.html">QString</a> & abs_name, const <a href="qstring.html">QString</a> & text )<tt> [virtual]</tt>
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| 258 | </h3>
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| 259 | Sets <em>text</em> to be the data item associated with the absolute name
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| 260 | <em>abs_name</em>.
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| 261 | <p> Equivalent to <a href="#setData">setData</a>(abs_name, new <a href="qtextdrag.html">QTextDrag</a>(text)).
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| 262 |
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| 263 | <h3 class=fn><a href="qmimesourcefactory.html">QMimeSourceFactory</a> * <a name="takeDefaultFactory"></a>QMimeSourceFactory::takeDefaultFactory ()<tt> [static]</tt>
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| 264 | </h3>
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| 265 | Sets the <a href="#defaultFactory">defaultFactory</a>() to 0 and returns the previous one.
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| 266 |
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| 267 | <!-- eof -->
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| 268 | <hr><p>
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| 269 | This file is part of the <a href="index.html">Qt toolkit</a>.
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| 270 | Copyright © 1995-2007
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| 271 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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| 272 | <table width=100% cellspacing=0 border=0><tr>
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| 273 | <td>Copyright © 2007
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| 274 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 275 | <td align=right><div align=right>Qt 3.3.8</div>
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| 276 | </table></div></address></body>
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| 277 | </html>
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