source: trunk/src/corelib/plugin/qplugin.qdoc@ 1023

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in a
** written agreement between you and Nokia.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \headerfile <QtPlugin>
    \title Macros for Defining Plugins

    \brief The <QtPlugin> header files defines macros for defining plugins.

    \sa {How to Create Qt Plugins}
*/

/*!
    \macro Q_DECLARE_INTERFACE(ClassName, Identifier)
    \relates <QtPlugin>

    This macro associates the given \a Identifier (a string literal)
    to the interface class called \a ClassName. The \a Identifier must
    be unique. For example:

    \snippet examples/tools/plugandpaint/interfaces.h 3

    This macro is normally used right after the class definition for
    \a ClassName, in a header file. See the
    \l{tools/plugandpaint}{Plug & Paint} example for details.

    If you want to use Q_DECLARE_INTERFACE with interface classes
    declared in a namespace then you have to make sure the Q_DECLARE_INTERFACE
    is not inside a namespace though. For example:
    \snippet doc/src/snippets/code/doc_src_qplugin.qdoc 0

    \sa Q_INTERFACES(), Q_EXPORT_PLUGIN2(), {How to Create Qt Plugins}
*/

/*!
    \macro Q_EXPORT_PLUGIN(ClassName)
    \relates <QtPlugin>
    \obsolete

    Use Q_EXPORT_PLUGIN2() instead. This macro is equivalent to
    Q_EXPORT_PLUGIN2(\a ClassName, \a ClassName).
*/

/*!
    \macro Q_EXPORT_PLUGIN2(PluginName, ClassName)
    \relates <QtPlugin>
    \since 4.1
    \keyword Q_EXPORT_PLUGIN2

    This macro exports the plugin class \a ClassName for the plugin specified
    by \a PluginName. The value of \a PluginName should correspond to the
    \l{qmake Variable Reference#TARGET}{TARGET} specified in the plugin's
    project file.

    There should be exactly one occurrence of this macro in the source code
    for a Qt plugin, and it should be used where the implementation is written
    rather than in a header file.

    Example:

    \snippet doc/src/snippets/code/doc_src_qplugin.qdoc 1

    See the \l{tools/plugandpaint}{Plug & Paint} example for details.

    \sa Q_DECLARE_INTERFACE(), {How to Create Qt Plugins}
*/

/*!
    \macro Q_IMPORT_PLUGIN(PluginName)
    \relates <QtPlugin>

    This macro imports the plugin named \a PluginName, corresponding
    to the \l{qmake Variable Reference#TARGET}{TARGET} specified in the
    plugin's project file.

    Inserting this macro into your application's source code will allow
    you to make use of a static plugin.

    Example:

    \snippet doc/src/snippets/code/doc_src_qplugin.qdoc 2

    Static plugins must also be included by the linker when your
    application is built. For Qt's predefined plugins,
    you can use the \c QTPLUGIN to add
    the required plugins to your build. For example:

    \snippet doc/src/snippets/code/doc_src_qplugin.qdoc 3

    \sa {Static Plugins}, {How to Create Qt Plugins}, {Using qmake}
*/

/*!
    \macro Q_EXPORT_STATIC_PLUGIN(ClassName)
    \relates <QtPlugin>
    \internal
*/