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collectionextensioninterface.h 2.38 KiB
/****************************************************************************
* Copyright (C) 2014-2018 Savoir-faire Linux *
* Author : Emmanuel Lepage Vallee <emmanuel.lepage@savoirfairelinux.com> *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#pragma once
#include "typedefs.h"
#include <QtCore/QVariant>
#include <QtCore/QModelIndex>
class ItemBase;
class CollectionInterface;
/**
* This interface can be used to extend the collection system.
*
* It is a business logic container. The interface will eventually be extended
* to allow various callbacks at key ItemBase lifecycle moment.
*
* Subclasses need to call DECLARE_COLLECTION_EXTENSION in the .cpp and
* include collectionextensionmodel.h
*/
class LIB_EXPORT CollectionExtensionInterface : public QObject
{
Q_OBJECT
friend class CollectionExtensionModel;
public:
explicit CollectionExtensionInterface(QObject* parent);
virtual QVariant data(int role) const = 0;
Q_SIGNALS:
void dataChanged(const QModelIndex& idx);
};
#define DECLARE_COLLECTION_EXTENSION_M1(x, y) x ## y
#define DECLARE_COLLECTION_EXTENSION_M2(x, y) DECLARE_COLLECTION_EXTENSION_M1(x, y)
#define DECLARE_COLLECTION_EXTENSION(T) __attribute__ ((unused)) \
static auto DECLARE_COLLECTION_EXTENSION_M2(val,__COUNTER__) = []{\
CollectionExtensionModel::registerExtension<T>();\
return 0;\
}();