textcodecinterface.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.7平台上编译为嵌入式图形界面操作系统。

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**
** This file is part of the Qtopia Environment.
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** packaging of this file.
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/*!
  \class TextCodecInterface textcodecinterface.h
  \brief The TextCodecInterface class defines the interface for text codec plugins.

  Internally, Qtopia works completely with Unicode text strings, however
  it is sometimes necessary to convert to or from other character sets.

  To add support for a character set format, you must create a
  Text Codec plugin. To do so, follow these steps:

  <ol>
   <li> Create a subclass of QTextCodec that implements the conversion.
	This procedure is a standard part of Qt, and is documented there.

   <li> Create a subclass of TextCodecInterface that creates your
	QTextCodec subclass. Ensure that your class:
    <ul>
	<li> Inherits TextCodecInterface
	<li> Inplements all pure-virtual methods of TextCodecInterface
	<li> Includes the declarations:
<pre>
public:
    QRESULT queryInterface( const QUuid&, QUnknownInterface** );
    Q_REFCOUNT
private:
    ulong ref;
</pre>
    </ul>

   <li> In the code of the TextCodecInterface subclass:
<pre>
QRESULT <i>YourTextCodecInterfaceSubClass</i>::queryInterface( const QUuid &uuid, QUnknownInterface **iface )
{
    *iface = 0;
    if ( uuid == IID_QUnknown )
        *iface = this;
    else if ( uuid == IID_QtopiaTextCodec )
        *iface = this;

    if ( *iface )
        (*iface)->addRef();
    return (*iface) ? QS_OK : QS_FALSE;
}

Q_EXPORT_INTERFACE()
{
    Q_CREATE_INSTANCE( <i>YourTextCodecInterfaceSubClass</i> )
}
</pre>

    <li> Build your code as a Shared Object (.so file)
	(such as by using the tmake lib template).
    <li> Ship your plugin in the Qtopia plugins/textcodecs/ directory.
  </ol>
*/
/*!
    \fn QStringList TextCodecInterface::names() const

    Returns the list of codec names. You should use IANA registered names.
*/
/*!
    \fn QTextCodec *TextCodecInterface::createForName( const QString &name )

    Returns a new QTextCodec (subclass) for the given codec \a name.
*/
/*!
    \fn QValueList<int> TextCodecInterface::mibEnums() const

    Returns the list of codec MIBs. You should use IANA registered MIB values.
*/
/*!
    \fn QTextCodec *TextCodecInterface::createForMib( int mib )

    Returns a new QTextCodec (subclass) for the given \a mib.
*/