110 lines
4.0 KiB
C
110 lines
4.0 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Designer of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef EXTENSION_H
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#define EXTENSION_H
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#include <QtCore/QString>
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#include <QtCore/QObject>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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#define Q_TYPEID(IFace) QLatin1String(IFace##_iid)
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class QAbstractExtensionFactory
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{
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public:
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virtual ~QAbstractExtensionFactory() {}
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virtual QObject *extension(QObject *object, const QString &iid) const = 0;
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};
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Q_DECLARE_INTERFACE(QAbstractExtensionFactory, "com.trolltech.Qt.QAbstractExtensionFactory")
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class QAbstractExtensionManager
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{
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public:
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virtual ~QAbstractExtensionManager() {}
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virtual void registerExtensions(QAbstractExtensionFactory *factory, const QString &iid) = 0;
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virtual void unregisterExtensions(QAbstractExtensionFactory *factory, const QString &iid) = 0;
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virtual QObject *extension(QObject *object, const QString &iid) const = 0;
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};
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Q_DECLARE_INTERFACE(QAbstractExtensionManager, "com.trolltech.Qt.QAbstractExtensionManager")
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#if defined(Q_CC_MSVC) && (_MSC_VER < 1300)
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template <class T>
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inline T qt_extension_helper(QAbstractExtensionManager *, QObject *, T)
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{ return 0; }
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template <class T>
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inline T qt_extension(QAbstractExtensionManager* manager, QObject *object)
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{ return qt_extension_helper(manager, object, T(0)); }
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#define Q_DECLARE_EXTENSION_INTERFACE(IFace, IId) \
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const char * const IFace##_iid = IId; \
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Q_DECLARE_INTERFACE(IFace, IId) \
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template <> inline IFace *qt_extension_helper<IFace *>(QAbstractExtensionManager *manager, QObject *object, IFace *) \
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{ QObject *extension = manager->extension(object, Q_TYPEID(IFace)); return (IFace *)(extension ? extension->qt_metacast(IFace##_iid) : 0); }
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#else
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template <class T>
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inline T qt_extension(QAbstractExtensionManager* manager, QObject *object)
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{ return 0; }
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#define Q_DECLARE_EXTENSION_INTERFACE(IFace, IId) \
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const char * const IFace##_iid = IId; \
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Q_DECLARE_INTERFACE(IFace, IId) \
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template <> inline IFace *qt_extension<IFace *>(QAbstractExtensionManager *manager, QObject *object) \
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{ QObject *extension = manager->extension(object, Q_TYPEID(IFace)); return extension ? static_cast<IFace *>(extension->qt_metacast(IFace##_iid)) : static_cast<IFace *>(0); }
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#endif
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // EXTENSION_H
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