qwt_plot_tradingcurve.h

/******************************************************************************
 * 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
 *
 * Modified by ChenZongYan in 2024 <czy.t@163.com>
 *   Summary of major modifications (see ChangeLog.md for full history):
 *   1. CMake build system & C++11 throughout.
 *   2. Core panner/ zoomer refactored:
 *        - QwtPanner → QwtCachePanner (pixmap-cache version)
 *        - New real-time QwtPlotPanner derived from QwtPicker.
 *   3. Zoomer supports multi-axis.
 *   4. Parasite-plot framework:
 *        - QwtFigure, QwtPlotParasiteLayout, QwtPlotTransparentCanvas,
 *        - QwtPlotScaleEventDispatcher, built-in pan/zoom on axis.
 *   5. New picker: QwtPlotSeriesDataPicker (works with date axis).
 *   6. Raster & color-map extensions:
 *        - QwtGridRasterData (2-D table + interpolation)
 *        - QwtLinearColorMap::stopColors(), stopPos() API rename.
 *   7. Bar-chart: expose pen/brush control.
 *   8. Amalgamated build: single QwtPlot.h / QwtPlot.cpp pair in src-amalgamate.
 *****************************************************************************/
 
#ifndef QWT_PLOT_TRADING_CURVE_H
#define QWT_PLOT_TRADING_CURVE_H
 
#include "qwt_global.h"
#include "qwt_plot_seriesitem.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
    };
 
    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
 
    explicit QwtPlotTradingCurve( const QString& title = QString() );
    explicit QwtPlotTradingCurve( const QwtText& title );
 
    virtual ~QwtPlotTradingCurve();
 
    virtual int rtti() const QWT_OVERRIDE;
 
    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 );
    double symbolExtent() const;
 
    void setMinSymbolWidth( double );
    double minSymbolWidth() const;
 
    void setMaxSymbolWidth( double );
    double maxSymbolWidth() const;
 
    virtual void drawSeries( QPainter*,
        const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QRectF& canvasRect, int from, int to ) const QWT_OVERRIDE;
 
    virtual QRectF boundingRect() const QWT_OVERRIDE;
 
    virtual QwtGraphic legendIcon( int index, const QSizeF& ) const QWT_OVERRIDE;
 
  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 symbolWidth ) const;
 
    void drawBar( QPainter*, 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* m_data;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotTradingCurve::PaintAttributes )
 
#endif