qwt_plot_tradingcurve.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_TRADING_CURVE_H
#define QWT_PLOT_TRADING_CURVE_H

#include "qwt_global.h"
#include "qwt_plot_seriesitem.h"
#include "qwt_series_data.h"

class QWT_EXPORT QwtPlotTradingCurve: 
    public QwtPlotSeriesItem, public QwtSeriesStore<QwtOHLCSample>
{
public:
    enum SymbolStyle
    {
        NoSymbol = -1,

        Bar,

        CandleStick,

        UserSymbol = 100
    };

    enum Direction
    {
        Increasing,

        Decreasing
    };

    enum PaintAttribute
    {
        ClipSymbols   = 0x01
    };

    typedef QFlags<PaintAttribute> PaintAttributes;

    explicit QwtPlotTradingCurve( const QString &title = QString() );
    explicit QwtPlotTradingCurve( const QwtText &title );

    virtual ~QwtPlotTradingCurve();

    virtual int rtti() const;

    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;

    void setSamples( const QVector<QwtOHLCSample> & );
    void setSamples( QwtSeriesData<QwtOHLCSample> * );

    void setSymbolStyle( SymbolStyle style );
    SymbolStyle symbolStyle() const;

    void setSymbolPen( const QColor &, 
        qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
    void setSymbolPen( const QPen & );
    QPen symbolPen() const;

    void setSymbolBrush( Direction, const QBrush & );
    QBrush symbolBrush( Direction ) const;

    void setSymbolExtent( double width );
    double symbolExtent() const;

    void setMinSymbolWidth( double );
    double minSymbolWidth() const;

    void setMaxSymbolWidth( double );
    double maxSymbolWidth() const;

    virtual void drawSeries( QPainter *painter,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect, int from, int to ) const;

    virtual QRectF boundingRect() const;

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

protected:

    void init();

    virtual void drawSymbols( QPainter *,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect, int from, int to ) const;

    virtual void drawUserSymbol( QPainter *, 
        SymbolStyle, const QwtOHLCSample &,
        Qt::Orientation, bool inverted, double width ) const;

    void drawBar( QPainter *painter, const QwtOHLCSample &, 
        Qt::Orientation, bool inverted, double width ) const;

    void drawCandleStick( QPainter *, const QwtOHLCSample &, 
        Qt::Orientation, double width ) const;

    virtual double scaledSymbolWidth(
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect ) const;

private:
    class PrivateData;
    PrivateData *d_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotTradingCurve::PaintAttributes )

#endif