KDChartAbstractDiagram.h

Go to the documentation of this file.

/****************************************************************************
** Copyright (C) 2001-2020 Klaralvdalens Datakonsult AB.  All rights reserved.
**
** This file is part of the KD Chart library.
**
** 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 may be distributed and/or modified under the terms of the
** GNU General Public License version 2 and version 3 as published by the
** Free Software Foundation and appearing in the file LICENSE.GPL.txt included.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Contact info@kdab.com 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:
        ~AbstractDiagram() override;


        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;

        void setModel ( QAbstractItemModel * model ) override;

        void setSelectionModel( QItemSelectionModel* selectionModel ) override;

        virtual void setAttributesModel( AttributesModel* model );

        virtual bool usesExternalAttributesModel() const;

        virtual AttributesModel* attributesModel() const;

        void setRootIndex ( const QModelIndex& idx ) override;

        QRect visualRect(const QModelIndex &index) const override;
        void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override;
        QModelIndex indexAt(const QPoint &point) const override;
        QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers) override;
        int horizontalOffset() const override;
        int verticalOffset() const override;
        bool isIndexHidden(const QModelIndex &index) const override;
        void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command) override;
        QRegion visualRegionForSelection(const QItemSelection &selection) const override;
        virtual QRegion visualRegion(const QModelIndex &index) const;
#if QT_VERSION < 0x050000
        virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
#else
        void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles = QVector<int>()) override;
#endif

        void doItemsLayout() override;

        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;


        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, qreal value );

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

        qreal valueForCell( int row, int column ) const;

    Q_SIGNALS:
        void layoutChanged( AbstractDiagram* );

        void aboutToBeDestroyed();

        void modelsChanged();

        void attributesModelAboutToChange( AttributesModel* newModel, AttributesModel* oldModel );

        void modelDataChanged();

        void dataHidden();

        void propertiesChanged();

        void boundariesChanged();
        void viewportCoordinateSystemChanged();

    private:
        QModelIndex conditionallyMapFromSource( const QModelIndex & sourceIndex ) 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