qwt_plot_item.h

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/******************************************************************************
 * 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 "qwt_axis_id.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
    };
 
    Q_DECLARE_FLAGS( ItemAttributes, ItemAttribute )
 
    
    enum ItemInterest
    {
        ScaleInterest = 0x01,
 
        LegendInterest = 0x02
    };
 
    Q_DECLARE_FLAGS( ItemInterests, ItemInterest )
 
    
    enum RenderHint
    {
        RenderAntialiased = 0x1
    };
 
    Q_DECLARE_FLAGS( RenderHints, RenderHint )
 
    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( QwtAxisId xAxis, QwtAxisId yAxis );
 
    void setXAxis( QwtAxisId );
    QwtAxisId xAxis() const;
 
    void setYAxis( QwtAxisId );
    QwtAxisId 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* m_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