121 lines
4.3 KiB
C++
121 lines
4.3 KiB
C++
/****************************************************************************
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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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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of Qt Designer. This header
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// file may change from version to version without notice, or even be removed.
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//
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// We mean it.
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//
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#ifndef SHARED_EXTENSIONFACTORY_H
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#define SHARED_EXTENSIONFACTORY_H
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#include <QtDesigner/default_extensionfactory.h>
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#include <QtDesigner/QExtensionManager>
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QT_BEGIN_NAMESPACE
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namespace qdesigner_internal {
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// Extension factory for registering an extension for an object type.
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template <class ExtensionInterface, class Object, class Extension>
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class ExtensionFactory: public QExtensionFactory
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{
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public:
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explicit ExtensionFactory(const QString &iid, QExtensionManager *parent = 0);
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// Convenience for registering the extension. Do not use for derived classes.
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static void registerExtension(QExtensionManager *mgr, const QString &iid);
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protected:
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virtual QObject *createExtension(QObject *qObject, const QString &iid, QObject *parent) const;
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private:
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// Can be overwritten to perform checks on the object.
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// Default does a qobject_cast to the desired class.
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virtual Object *checkObject(QObject *qObject) const;
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const QString m_iid;
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};
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template <class ExtensionInterface, class Object, class Extension>
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ExtensionFactory<ExtensionInterface, Object, Extension>::ExtensionFactory(const QString &iid, QExtensionManager *parent) :
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QExtensionFactory(parent),
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m_iid(iid)
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{
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}
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template <class ExtensionInterface, class Object, class Extension>
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Object *ExtensionFactory<ExtensionInterface, Object, Extension>::checkObject(QObject *qObject) const
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{
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return qobject_cast<Object*>(qObject);
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}
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template <class ExtensionInterface, class Object, class Extension>
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QObject *ExtensionFactory<ExtensionInterface, Object, Extension>::createExtension(QObject *qObject, const QString &iid, QObject *parent) const
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{
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if (iid != m_iid)
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return 0;
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Object *object = checkObject(qObject);
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if (!object)
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return 0;
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return new Extension(object, parent);
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}
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template <class ExtensionInterface, class Object, class Extension>
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void ExtensionFactory<ExtensionInterface, Object, Extension>::registerExtension(QExtensionManager *mgr, const QString &iid)
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{
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ExtensionFactory *factory = new ExtensionFactory(iid, mgr);
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mgr->registerExtensions(factory, iid);
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}
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} // namespace qdesigner_internal
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QT_END_NAMESPACE
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#endif // SHARED_EXTENSIONFACTORY_H
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