qwt_plot_item.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_PLOT_ITEM_H
#define QWT_PLOT_ITEM_H

#include "qwt_global.h"
#include <qmetatype.h>

class QwtScaleMap;
class QwtScaleDiv;
class QwtPlot;
class QwtText;
class QwtGraphic;
class QwtLegendData;
class QRectF;
class QPainter;
class QString;
template <typename T> class QList;

class QWT_EXPORT QwtPlotItem
{
public:
    enum RttiValues
    {
        Rtti_PlotItem = 0,

        Rtti_PlotGrid,

        Rtti_PlotScale,

        Rtti_PlotLegend,

        Rtti_PlotMarker,

        Rtti_PlotCurve,

        Rtti_PlotSpectroCurve,

        Rtti_PlotIntervalCurve,

        Rtti_PlotHistogram,

        Rtti_PlotSpectrogram,

        Rtti_PlotGraphic,

        Rtti_PlotTradingCurve,

        Rtti_PlotBarChart,

        Rtti_PlotMultiBarChart,

        Rtti_PlotShape,

        Rtti_PlotTextLabel,

        Rtti_PlotZone,

        Rtti_PlotVectorField,

        Rtti_PlotUserItem = 1000
    };

    enum ItemAttribute
    {
        Legend = 0x01,

        AutoScale = 0x02,

        Margins = 0x04
    };

    typedef QFlags<ItemAttribute> ItemAttributes;

    enum ItemInterest
    {
        ScaleInterest = 0x01,

        LegendInterest = 0x02
    };

    typedef QFlags<ItemInterest> ItemInterests;

    enum RenderHint
    {
        RenderAntialiased = 0x1
    };

    typedef QFlags<RenderHint> RenderHints;

    explicit QwtPlotItem();
    explicit QwtPlotItem( const QString &title );
    explicit QwtPlotItem( const QwtText &title );

    virtual ~QwtPlotItem();

    void attach( QwtPlot *plot );
    void detach();

    QwtPlot *plot() const;

    void setTitle( const QString &title );
    void setTitle( const QwtText &title );
    const QwtText &title() const;

    virtual int rtti() const;

    void setItemAttribute( ItemAttribute, bool on = true );
    bool testItemAttribute( ItemAttribute ) const;

    void setItemInterest( ItemInterest, bool on = true );
    bool testItemInterest( ItemInterest ) const;

    void setRenderHint( RenderHint, bool on = true );
    bool testRenderHint( RenderHint ) const;

    void setRenderThreadCount( uint numThreads );
    uint renderThreadCount() const;

    void setLegendIconSize( const QSize & );
    QSize legendIconSize() const;

    double z() const;
    void setZ( double z );

    void show();
    void hide();
    virtual void setVisible( bool );
    bool isVisible () const;

    void setAxes( int xAxis, int yAxis );

    void setXAxis( int axis );
    int xAxis() const;

    void setYAxis( int axis );
    int yAxis() const;

    virtual void itemChanged();
    virtual void legendChanged();

    virtual void draw( QPainter *painter,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect ) const = 0;

    virtual QRectF boundingRect() const;

    virtual void getCanvasMarginHint(
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect,
        double &left, double &top, double &right, double &bottom) const;

    virtual void updateScaleDiv(
        const QwtScaleDiv&, const QwtScaleDiv& );

    virtual void updateLegend( const QwtPlotItem *,
        const QList<QwtLegendData> & );

    QRectF scaleRect( const QwtScaleMap &, const QwtScaleMap & ) const;
    QRectF paintRect( const QwtScaleMap &, const QwtScaleMap & ) const;

    virtual QList<QwtLegendData> legendData() const;

    virtual QwtGraphic legendIcon( int index, const QSizeF  & ) const;

protected:
    QwtGraphic defaultIcon( const QBrush &, const QSizeF & ) const;

private:
    Q_DISABLE_COPY(QwtPlotItem)

    class PrivateData;
    PrivateData *d_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotItem::ItemAttributes )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotItem::ItemInterests )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotItem::RenderHints )

Q_DECLARE_METATYPE( QwtPlotItem * )

#endif