/*
 * Copyright 2008-2009 Ben Boeckel <MathStuf@gmail.com>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 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/>.
 */

#ifndef SIGMODRTREE_BASEMODEL
#define SIGMODRTREE_BASEMODEL

// Sigmodr tree includes
#include "Global.h"

// Qt includes
#include <QtCore/QString>
#include <QtCore/QVariant>

// Forward declarations
class KMenu;
class KUrl;
class QDomDocument;
namespace Sigmod
{
class Object;
}

namespace Sigmodr
{
namespace Tree
{
class SIGMODRTREE_NO_EXPORT BaseModel : public QObject
{
    Q_OBJECT
    
    public:
        BaseModel(BaseModel* parent, Sigmod::Object* object, const QString& name = "");
        virtual ~BaseModel();
        
        BaseModel* parent();
        
        virtual QVariant data(const int role = Qt::DisplayRole) const;
        virtual int rowCount() const = 0;
        
        virtual Qt::ItemFlags flags() const = 0;
        virtual bool setData(const QVariant& value, const int role = Qt::EditRole) = 0;
        
        virtual BaseModel* childItem(const int row) = 0;
        int indexNumber() const;
        
        virtual Qt::DropActions supportedDragActions() const = 0;
        virtual Qt::DropActions supportedDropActions() const = 0;
        
        virtual QString type() const;
        virtual QString types() const = 0;
        
        const Sigmod::Object* object() const;
        
        bool loadFromData(const QString& data, QDomDocument* xml) const;
        
        static const int TypeRole;
        static const int DropAcceptRole;
        static const int XmlRole;
        static const int WidgetRole;
        static const int ContextMenuRole;
    signals:
        void rowChanged(const int row);
        void rowsChanged(const QList<int>& rows);
    protected:
        virtual int findChild(BaseModel* model) const = 0;
        
        BaseModel* m_parent;
        Sigmod::Object* m_object;
        QString m_name;
    protected slots:
        void childRowChanged(const int row);
        void childRowsChanged(const QList<int>& rows);
};
}
}
Q_DECLARE_METATYPE(KMenu*)

#endif