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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of Qt Designer. This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//
#ifndef SHARED_EXTENSIONFACTORY_H
#define SHARED_EXTENSIONFACTORY_H
#include <QtDesigner/default_extensionfactory.h>
#include <QtDesigner/QExtensionManager>
QT_BEGIN_NAMESPACE
namespace qdesigner_internal {
// Extension factory for registering an extension for an object type.
template <class ExtensionInterface, class Object, class Extension>
class ExtensionFactory: public QExtensionFactory
{
public:
explicit ExtensionFactory(const QString &iid, QExtensionManager *parent = 0);
// Convenience for registering the extension. Do not use for derived classes.
static void registerExtension(QExtensionManager *mgr, const QString &iid);
protected:
virtual QObject *createExtension(QObject *qObject, const QString &iid, QObject *parent) const;
private:
// Can be overwritten to perform checks on the object.
// Default does a qobject_cast to the desired class.
virtual Object *checkObject(QObject *qObject) const;
const QString m_iid;
};
template <class ExtensionInterface, class Object, class Extension>
ExtensionFactory<ExtensionInterface, Object, Extension>::ExtensionFactory(const QString &iid, QExtensionManager *parent) :
QExtensionFactory(parent),
m_iid(iid)
{
}
template <class ExtensionInterface, class Object, class Extension>
Object *ExtensionFactory<ExtensionInterface, Object, Extension>::checkObject(QObject *qObject) const
{
return qobject_cast<Object*>(qObject);
}
template <class ExtensionInterface, class Object, class Extension>
QObject *ExtensionFactory<ExtensionInterface, Object, Extension>::createExtension(QObject *qObject, const QString &iid, QObject *parent) const
{
if (iid != m_iid)
return 0;
Object *object = checkObject(qObject);
if (!object)
return 0;
return new Extension(object, parent);
}
template <class ExtensionInterface, class Object, class Extension>
void ExtensionFactory<ExtensionInterface, Object, Extension>::registerExtension(QExtensionManager *mgr, const QString &iid)
{
ExtensionFactory *factory = new ExtensionFactory(iid, mgr);
mgr->registerExtensions(factory, iid);
}
} // namespace qdesigner_internal
QT_END_NAMESPACE
#endif // SHARED_EXTENSIONFACTORY_H
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