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197 lines
9.4 KiB
197 lines
9.4 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qmime_win.cpp:52 -->
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>QWindowsMime Class</title>
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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<font color="#004faf">Functions</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QWindowsMime Class Reference</h1>
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<p>The QWindowsMime class maps open-standard MIME to Window Clipboard formats.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qmime-h.html">qmime.h</a>></tt>
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<p><a href="qwindowsmime-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#QWindowsMime"><b>QWindowsMime</b></a> ()</li>
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<li class=fn>virtual <a href="#~QWindowsMime"><b>~QWindowsMime</b></a> ()</li>
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<li class=fn>virtual const char * <a href="#convertorName"><b>convertorName</b></a> () = 0</li>
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<li class=fn>virtual int <a href="#countCf"><b>countCf</b></a> () = 0</li>
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<li class=fn>virtual int <a href="#cf"><b>cf</b></a> ( int index ) = 0</li>
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<li class=fn>virtual bool <a href="#canConvert"><b>canConvert</b></a> ( const char * mime, int cf ) = 0</li>
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<li class=fn>virtual const char * <a href="#mimeFor"><b>mimeFor</b></a> ( int cf ) = 0</li>
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<li class=fn>virtual int <a href="#cfFor"><b>cfFor</b></a> ( const char * mime ) = 0</li>
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<li class=fn>virtual QByteArray <a href="#convertToMime"><b>convertToMime</b></a> ( QByteArray data, const char * mime, int cf ) = 0</li>
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<li class=fn>virtual QByteArray <a href="#convertFromMime"><b>convertFromMime</b></a> ( QByteArray data, const char * mime, int cf ) = 0</li>
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</ul>
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<h2>Static Public Members</h2>
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<ul>
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<li class=fn>void <a href="#initialize"><b>initialize</b></a> ()</li>
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<li class=fn>QPtrList<QWindowsMime> <a href="#all"><b>all</b></a> ()</li>
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<li class=fn>QWindowsMime * <a href="#convertor"><b>convertor</b></a> ( const char * mime, int cf )</li>
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<li class=fn>const char * <a href="#cfToMime"><b>cfToMime</b></a> ( int cf )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The QWindowsMime class maps open-standard MIME to Window Clipboard formats.
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<p> Qt's drag-and-drop and clipboard facilities use the MIME standard.
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On X11, this maps trivially to the Xdnd protocol, but on Windows
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although some applications use MIME types to describe clipboard
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formats, others use arbitrary non-standardized naming conventions,
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or unnamed built-in formats of Windows.
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<p> By instantiating subclasses of QWindowsMime that provide conversions
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between Windows Clipboard and MIME formats, you can convert
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proprietary clipboard formats to MIME formats.
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<p> Qt has predefined support for the following Windows Clipboard formats:
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<ul>
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<li> CF_UNICODETEXT - converted to "text/plain;charset=ISO-10646-UCS-2"
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and supported by <a href="qtextdrag.html">QTextDrag</a>.
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<li> CF_TEXT - converted to "text/plain;charset=system" or "text/plain"
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and supported by QTextDrag.
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<li> CF_DIB - converted to "image/*", where * is
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a <a href="qimage.html#outputFormats">Qt image format</a>,
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and supported by <a href="qimagedrag.html">QImageDrag</a>.
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<li> CF_HDROP - converted to "text/uri-list",
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and supported by <a href="quridrag.html">QUriDrag</a>.
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</ul>
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<p> An example use of this class would be to map the Windows Metafile
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clipboard format (CF_METAFILEPICT) to and from the MIME type "image/x-wmf".
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This conversion might simply be adding or removing a header, or even
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just passing on the data. See the
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<a href="dnd.html">Drag-and-Drop documentation</a> for more information
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on choosing and definition MIME types.
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<p> You can check if a MIME type is convertible using <a href="#canConvert">canConvert</a>() and
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can perform conversions with <a href="#convertToMime">convertToMime</a>() and <a href="#convertFromMime">convertFromMime</a>().
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<p>See also <a href="draganddrop.html">Drag And Drop Classes</a>, <a href="io.html">Input/Output and Networking</a>, and <a href="misc.html">Miscellaneous Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QWindowsMime"></a>QWindowsMime::QWindowsMime ()
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</h3>
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Constructs a new conversion object, adding it to the globally accessed
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list of available convertors.
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<h3 class=fn><a name="~QWindowsMime"></a>QWindowsMime::~QWindowsMime ()<tt> [virtual]</tt>
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</h3>
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Destroys a conversion object, removing it from the global
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list of available convertors.
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<h3 class=fn><a href="qptrlist.html">QPtrList</a><QWindowsMime> <a name="all"></a>QWindowsMime::all ()<tt> [static]</tt>
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</h3>
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Returns a list of all currently defined QWindowsMime objects.
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<h3 class=fn>bool <a name="canConvert"></a>QWindowsMime::canConvert ( const char * mime, int cf )<tt> [pure virtual]</tt>
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</h3>
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<p> Returns TRUE if the convertor can convert (both ways) between
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<em>mime</em> and <em>cf</em>; otherwise returns FALSE.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn>int <a name="cf"></a>QWindowsMime::cf ( int index )<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the Windows Clipboard format supported by this convertor
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that is ordinarily at position <em>index</em>. This means that <a href="#cf">cf</a>(0)
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returns the first Windows Clipboard format supported, and
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cf(countCf()-1) returns the last. If <em>index</em> is out of range the
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return value is undefined.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn>int <a name="cfFor"></a>QWindowsMime::cfFor ( const char * mime )<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the Windows Clipboard type used for MIME type <em>mime</em>, or
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0 if this convertor does not support <em>mime</em>.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn>const char * <a name="cfToMime"></a>QWindowsMime::cfToMime ( int cf )<tt> [static]</tt>
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</h3>
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Returns a MIME type for <em>cf</em>, or 0 if none exists.
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<h3 class=fn><a href="qbytearray.html">QByteArray</a> <a name="convertFromMime"></a>QWindowsMime::convertFromMime ( <a href="qbytearray.html">QByteArray</a> data, const char * mime, int cf )<tt> [pure virtual]</tt>
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</h3>
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<p> Returns <em>data</em> converted from MIME type <em>mime</em>
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to Windows Clipboard format <em>cf</em>.
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<p> Note that Windows Clipboard formats must all be self-terminating. The
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return value may contain trailing data.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn><a href="qbytearray.html">QByteArray</a> <a name="convertToMime"></a>QWindowsMime::convertToMime ( <a href="qbytearray.html">QByteArray</a> data, const char * mime, int cf )<tt> [pure virtual]</tt>
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</h3>
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<p> Returns <em>data</em> converted from Windows Clipboard format <em>cf</em>
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to MIME type <em>mime</em>.
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<p> Note that Windows Clipboard formats must all be self-terminating. The
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input <em>data</em> may contain trailing data.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn><a href="qwindowsmime.html">QWindowsMime</a> * <a name="convertor"></a>QWindowsMime::convertor ( const char * mime, int cf )<tt> [static]</tt>
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</h3>
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Returns the most-recently created QWindowsMime that can convert
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between the <em>mime</em> and <em>cf</em> formats. Returns 0 if no such convertor
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exists.
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<h3 class=fn>const char * <a name="convertorName"></a>QWindowsMime::convertorName ()<tt> [pure virtual]</tt>
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</h3>
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<p> Returns a name for the convertor.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn>int <a name="countCf"></a>QWindowsMime::countCf ()<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the number of Windows Clipboard formats supported by this
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convertor.
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<p> All subclasses must reimplement this pure virtual function.
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<h3 class=fn>void <a name="initialize"></a>QWindowsMime::initialize ()<tt> [static]</tt>
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</h3>
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This is an internal function.
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<h3 class=fn>const char * <a name="mimeFor"></a>QWindowsMime::mimeFor ( int cf )<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the MIME type used for Windows Clipboard format <em>cf</em>, or
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0 if this convertor does not support <em>cf</em>.
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<p> All subclasses must reimplement this pure virtual function.
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">Qt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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</html>
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