KDChartAbstractDiagram.h

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/****************************************************************************
 ** Copyright (C) 2007 Klaralvdalens Datakonsult AB.  All rights reserved.
 **
 ** This file is part of the KD Chart 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 Chart licenses may use this file in
 ** accordance with the KD Chart 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/kdchart for
 **   information about KDChart Commercial License Agreements.
 **
 ** Contact info@kdab.net if any conditions of this
 ** licensing are not clear to you.
 **
 **********************************************************************/

#ifndef KDCHARTABSTRACTDIAGRAM_H
#define KDCHARTABSTRACTDIAGRAM_H

#include <QList>
#include <QRectF>
#include <QAbstractItemView>

#include "KDChartGlobal.h"
#include "KDChartMarkerAttributes.h"
#include "KDChartAttributesModel.h"

namespace KDChart {

    class AbstractCoordinatePlane;
    class AttributesModel;
    class DataValueAttributes;
    class PaintContext;

    class KDCHART_EXPORT AbstractDiagram : public QAbstractItemView
    {
        Q_OBJECT
        Q_DISABLE_COPY( AbstractDiagram )
        KDCHART_DECLARE_PRIVATE_BASE_POLYMORPHIC( AbstractDiagram )

    friend class AbstractCoordinatePlane;
    friend class CartesianCoordinatePlane;
    friend class PolarCoordinatePlane;

    protected:
        explicit inline AbstractDiagram(
            Private *p, QWidget* parent, AbstractCoordinatePlane* plane );
        explicit AbstractDiagram (
            QWidget* parent = 0, AbstractCoordinatePlane* plane = 0 );
    public:
        virtual ~AbstractDiagram();


        bool compare( const AbstractDiagram* other )const;


        const QPair<QPointF, QPointF> dataBoundaries() const;

        // protected: // FIXME: why should that be private? (Mirko)
        virtual void paint ( PaintContext* paintContext ) = 0;

        virtual void resize ( const QSizeF& area ) = 0;

        virtual void setModel ( QAbstractItemModel * model );

        virtual void setSelectionModel( QItemSelectionModel* selectionModel );

        virtual void setAttributesModel( AttributesModel* model );

        virtual bool usesExternalAttributesModel()const;

        virtual AttributesModel* attributesModel() const;

        virtual void setRootIndex ( const QModelIndex& idx );

        virtual QRect visualRect(const QModelIndex &index) const;
        virtual void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible);
        virtual QModelIndex indexAt(const QPoint &point) const;
        virtual QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);
        virtual int horizontalOffset() const;
        virtual int verticalOffset() const;
        virtual bool isIndexHidden(const QModelIndex &index) const;
        virtual void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command);
        virtual QRegion visualRegionForSelection(const QItemSelection &selection) const;
        virtual QRegion visualRegion(const QModelIndex &index) const;
        virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
        virtual void doItemsLayout();

        AbstractCoordinatePlane* coordinatePlane() const;

        virtual void setCoordinatePlane( AbstractCoordinatePlane* plane );


        void setHidden( const QModelIndex & index, bool hidden );

        void setHidden( int dataset, bool hidden );

        void setHidden( bool hidden );

        bool isHidden() const;

        bool isHidden( int dataset ) const;

        bool isHidden( const QModelIndex & index ) const;


        void setDataValueAttributes( const QModelIndex & index,
                                     const DataValueAttributes & a );

        void setDataValueAttributes( int dataset, const DataValueAttributes & a );

        void setDataValueAttributes( const DataValueAttributes & a );

        DataValueAttributes dataValueAttributes() const;

        DataValueAttributes dataValueAttributes( int dataset ) const;

        DataValueAttributes dataValueAttributes( const QModelIndex & index ) const;

        void setPen( const QModelIndex& index, const QPen& pen );

        void setPen( int dataset, const QPen& pen );

        void setPen( const QPen& pen );

        QPen pen() const;
        QPen pen( int dataset ) const;
        QPen pen( const QModelIndex& index ) const;

        void setBrush( const QModelIndex& index, const QBrush& brush);

        void setBrush( int dataset, const QBrush& brush );

        void setBrush( const QBrush& brush);

        QBrush brush() const;
        QBrush brush( int dataset ) const;
        QBrush brush( const QModelIndex& index ) const;

        void setUnitPrefix( const QString& prefix, int column, Qt::Orientation orientation );
        void setUnitPrefix( const QString& prefix, Qt::Orientation orientation );

        void setUnitSuffix( const QString& suffix, int column, Qt::Orientation orientation );
         void setUnitSuffix( const QString& suffix, Qt::Orientation orientation );

        QString unitPrefix( int column, Qt::Orientation orientation, bool fallback = false ) const;
        QString unitPrefix( Qt::Orientation orientation ) const;

        QString unitSuffix( int column, Qt::Orientation orientation, bool fallback = false ) const;
        QString unitSuffix( Qt::Orientation orientation ) const;

        void setAllowOverlappingDataValueTexts( bool allow );

        bool allowOverlappingDataValueTexts() const;

        void setAntiAliasing( bool enabled );

        bool antiAliasing() const;

        void useDefaultColors();

        void useRainbowColors();

        void useSubduedColors();

        QStringList itemRowLabels() const;

        QStringList datasetLabels() const;

        QList<QBrush> datasetBrushes() const;

        QList<QPen> datasetPens() const;

        QList<MarkerAttributes> datasetMarkers() const;


        // configure the ordinate in percent mode - values 0 to 100
        void setPercentMode( bool percent );
        bool percentMode() const;

        virtual void paintMarker( QPainter* painter,
                                  const MarkerAttributes& markerAttributes,
                                  const QBrush& brush, const QPen&,
                                  const QPointF& point, const QSizeF& size );

        int datasetDimension() const;

        void setDatasetDimension( int dimension );

    protected:
        void setDatasetDimensionInternal( int dimension );

    public:
        void update() const;

        void paintMarker( QPainter* painter, const DataValueAttributes& a,
                          const QModelIndex& index,
                          const QPointF& pos );
        void paintMarker( QPainter* painter,
                          const QModelIndex& index,
                          const QPointF& pos );
        void paintDataValueText( QPainter* painter, const QModelIndex& index,
                                 const QPointF& pos, double value );

        // reverse mapping:
        QModelIndexList indexesAt( const QPoint& point ) const;

    protected:
        virtual bool checkInvariants( bool justReturnTheStatus=false ) const;
        virtual const QPair<QPointF, QPointF> calculateDataBoundaries() const = 0;

    protected Q_SLOTS:
        void setDataBoundariesDirty() const;

    protected:
        virtual void paintDataValueTexts( QPainter* painter );
        virtual void paintMarkers( QPainter* painter );
        void setAttributesModelRootIndex( const QModelIndex& );
        QModelIndex attributesModelRootIndex() const;

        double valueForCell( int row, int column ) const;

    Q_SIGNALS:
        void layoutChanged( AbstractDiagram* );

        void modelsChanged();

        void dataHidden();

        void propertiesChanged();

    private:
        QModelIndex conditionallyMapFromSource( const QModelIndex & sourceIndex ) const;
        QString roundValues( double value, const int decimalPos,
                              const int decimalDigits ) const;

    };

    typedef QList<AbstractDiagram*> AbstractDiagramList;
    typedef QList<const AbstractDiagram*> ConstAbstractDiagramList;

    class PrivateAttributesModel : public AttributesModel {
        Q_OBJECT
    public:
        explicit PrivateAttributesModel( QAbstractItemModel* model, QObject * parent = 0 )
            : AttributesModel(model,parent) {}
    };
}

#endif

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