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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** 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. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\headerfile <QtPlugin>
\title Defining Plugins
\keyword qtplugin-defining-plugins
\ingroup plugins
\brief The <QtPlugin> header file 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 plugandpaint/app/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/app}{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 code/doc_src_qplugin.cpp 0
\sa Q_INTERFACES(), {How to Create Qt Plugins}
*/
/*!
\macro Q_PLUGIN_METADATA(...)
\relates <QtPlugin>
\since 5.0
This macro is being used to declare meta data that is part of a plugin
that instantiates this object.
The macro needs to declare the IID of the interface implemented through
the object, and reference a file containing the meta data for the plugin.
There should be exactly one occurrence of this macro in the source code
for a Qt plugin.
Example:
\snippet code/doc_src_qplugin.cpp 1
See the \l{tools/plugandpaint/app}{Plug & Paint} example for details.
Note that the class this macro appears on must be default-constructible.
FILE is optional and points to a json file.
The json file must reside in one of the include directories specified
by the build-system.
moc exits with an error when it could not find the specified file.
\sa Q_DECLARE_INTERFACE(), {How to Create Qt Plugins}
*/
/*!
\macro Q_IMPORT_PLUGIN(PluginName)
\relates <QtPlugin>
This macro imports the plugin named \a PluginName, which corresponds
with the name of the class that declares metadata for the plugin with
Q_PLUGIN_METADATA().
Inserting this macro into your application's source code will allow
you to make use of a static plugin.
Example:
\snippet code/doc_src_qplugin.cpp 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 code/doc_src_qplugin.pro 3
\sa {Static Plugins}, {How to Create Qt Plugins}, {qmake-getting-started}{Getting Started with qmake}
*/
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