kdganttabstractgrid.h

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00001 /****************************************************************************
00002 ** Copyright (C) 2001-2011 Klaralvdalens Datakonsult AB.  All rights reserved.
00003 **
00004 ** This file is part of the KD Chart library.
00005 **
00006 ** Licensees holding valid commercial KD Chart licenses may use this file in
00007 ** accordance with the KD Chart Commercial License Agreement provided with
00008 ** the Software.
00009 **
00010 **
00011 ** This file may be distributed and/or modified under the terms of the
00012 ** GNU General Public License version 2 and version 3 as published by the
00013 ** Free Software Foundation and appearing in the file LICENSE.GPL.txt included.
00014 **
00015 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00016 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00017 **
00018 ** Contact info@kdab.com if any conditions of this licensing are not
00019 ** clear to you.
00020 **
00021 **********************************************************************/
00022 
00023 #ifndef KDGANTTABSTRACTGRID_H
00024 #define KDGANTTABSTRACTGRID_H
00025 
00026 #include "kdganttglobal.h"
00027 #include "kdganttconstraint.h"
00028 
00029 class QPainter;
00030 class QRectF;
00031 class QAbstractItemModel;
00032 class QModelIndex;
00033 
00034 namespace KDGantt {
00035     class AbstractRowController;
00036     class Span;
00037 
00038     class KDCHART_EXPORT AbstractGrid : public QObject {
00039         Q_OBJECT
00040         KDGANTT_DECLARE_PRIVATE_BASE_POLYMORPHIC( AbstractGrid )
00041         friend class GraphicsScene;
00042     public:
00043 
00044         AbstractGrid(QObject* parent = 0);
00045         virtual ~AbstractGrid();
00046 
00047         QAbstractItemModel* model() const;
00048         QModelIndex rootIndex() const;
00049 
00050         virtual Span mapToChart( const QModelIndex& idx ) const = 0;
00051         virtual bool mapFromChart( const Span& span, const QModelIndex& idx,
00052                                    const QList<Constraint>& constraints=QList<Constraint>() ) const = 0;
00053         virtual qreal mapToChart( const QVariant &value ) const;
00054         virtual QVariant mapFromChart( qreal x ) const;
00055         bool isSatisfiedConstraint( const Constraint& c ) const;
00056 
00057         virtual void paintGrid( QPainter* painter, const QRectF& sceneRect, const QRectF& exposedRect,
00058                                 AbstractRowController* rowController = 0, QWidget* widget=0 ) = 0;
00059         virtual void paintHeader( QPainter* painter, const QRectF& headerRect, const QRectF& exposedRect,
00060                                   qreal offset, QWidget* widget=0 ) = 0;
00061 
00062     public Q_SLOTS:
00063         /*internal*/ virtual void setModel( QAbstractItemModel* model );
00064         /*internal*/ virtual void setRootIndex( const QModelIndex& idx );
00065     Q_SIGNALS:
00066         void gridChanged();
00067 
00068     protected:
00069         virtual void drawBackground(QPainter* paint, const QRectF& rect);
00070         virtual void drawForeground(QPainter* paint, const QRectF& rect);
00071     };
00072 }
00073 
00074 #endif /* KDGANTTABSTRACTGRID_H */
00075 
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