/****************************************************************************
 ** Copyright (C) 2001-2006 Klarälvdalens Datakonsult AB.  All rights reserved.
 **
 ** This file is part of the KD Gantt library.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** Licensees holding valid commercial KD Gantt licenses may use this file in
 ** accordance with the KD Gantt Commercial License Agreement provided with
 ** the Software.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.kdab.net/kdgantt for
 **   information about KD Gantt Commercial License Agreements.
 **
 ** Contact info@kdab.net if any conditions of this
 ** licensing are not clear to you.
 **
 **********************************************************************/
#ifndef KDGANTTABSTRACTGRID_H
#define KDGANTTABSTRACTGRID_H

#include "kdganttglobal.h"
#include "kdganttconstraint.h"

#include <QPainter>
#include <QRectF>
#include <QAbstractItemModel>
#include <QModelIndex>

namespace KDGantt {
    class AbstractRowController;
    class Span;

    class KDGANTT_EXPORT AbstractGrid : public QObject {
        Q_OBJECT
        KDGANTT_DECLARE_PRIVATE_BASE_POLYMORPHIC( AbstractGrid )
	friend class GraphicsScene;
    public:

        AbstractGrid(QObject* parent = 0);
        virtual ~AbstractGrid();

        QAbstractItemModel* model() const;
        QModelIndex rootIndex() const;

        virtual Span mapToChart( const QModelIndex& idx ) const = 0;
        virtual bool mapFromChart( const Span& span, const QModelIndex& idx,
                                   const QList<Constraint>& constraints=QList<Constraint>() ) const = 0;
        bool isSatisfiedConstraint( const Constraint& c ) const;

        virtual void paintGrid( QPainter* painter, const QRectF& sceneRect, const QRectF& exposedRect,
                                AbstractRowController* rowController = 0, QWidget* widget=0 ) = 0;
        virtual void paintHeader( QPainter* painter, const QRectF& headerRect, const QRectF& exposedRect,
                                  qreal offset, QWidget* widget=0 ) = 0;
    public Q_SLOTS:
        /*internal*/ virtual void setModel( QAbstractItemModel* model );
        /*internal*/ virtual void setRootIndex( const QModelIndex& idx );
    Q_SIGNALS:
        void gridChanged();
    };
}

#endif /* KDGANTTABSTRACTGRID_H */