source: ntrip/trunk/BNC/qwt/qwt_plot_tradingcurve.h@ 8312

Last change on this file since 8312 was 8127, checked in by stoecker, 8 years ago

update qwt and qwtpolar, many QT5 fixes (unfinished)

File size: 5.1 KB
Line 
1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10#ifndef QWT_PLOT_TRADING_CURVE_H
11#define QWT_PLOT_TRADING_CURVE_H
12
13#include "qwt_global.h"
14#include "qwt_plot_seriesitem.h"
15#include "qwt_series_data.h"
16
17/*!
18 \brief QwtPlotTradingCurve illustrates movements in the price of a
19 financial instrument over time.
20
21 QwtPlotTradingCurve supports candlestick or bar ( OHLC ) charts
22 that are used in the domain of technical analysis.
23
24 While the length ( height or width depending on orientation() )
25 of each symbol depends on the corresponding OHLC sample the size
26 of the other dimension can be controlled using:
27
28 - setSymbolExtent()
29 - setSymbolMinWidth()
30 - setSymbolMaxWidth()
31
32 The extent is a size in scale coordinates, so that the symbol width
33 is increasing when the plot is zoomed in. Minimum/Maximum width
34 is in widget coordinates independent from the zoom level.
35 When setting the minimum and maximum to the same value, the width of
36 the symbol is fixed.
37*/
38class QWT_EXPORT QwtPlotTradingCurve:
39 public QwtPlotSeriesItem, QwtSeriesStore<QwtOHLCSample>
40{
41public:
42 /*!
43 \brief Symbol styles.
44
45 The default setting is QwtPlotSeriesItem::CandleStick.
46 \sa setSymbolStyle(), symbolStyle()
47 */
48 enum SymbolStyle
49 {
50 //! Nothing is displayed
51 NoSymbol = -1,
52
53 /*!
54 A line on the chart shows the price range (the highest and lowest
55 prices) over one unit of time, e.g. one day or one hour.
56 Tick marks project from each side of the line indicating the
57 opening and closing price.
58 */
59 Bar,
60
61 /*!
62 The range between opening/closing price are displayed as
63 a filled box. The fill brush depends on the direction of the
64 price movement. The box is connected to the highest/lowest
65 values by lines.
66 */
67 CandleStick,
68
69 /*!
70 SymbolTypes >= UserSymbol are displayed by drawUserSymbol(),
71 that needs to be overloaded and implemented in derived
72 curve classes.
73
74 \sa drawUserSymbol()
75 */
76 UserSymbol = 100
77 };
78
79 /*!
80 \brief Direction of a price movement
81 */
82 enum Direction
83 {
84 //! The closing price is higher than the opening price
85 Increasing,
86
87 //! The closing price is lower than the opening price
88 Decreasing
89 };
90
91 /*!
92 Attributes to modify the drawing algorithm.
93 \sa setPaintAttribute(), testPaintAttribute()
94 */
95 enum PaintAttribute
96 {
97 //! Check if a symbol is on the plot canvas before painting it.
98 ClipSymbols = 0x01
99 };
100
101 //! Paint attributes
102 typedef QFlags<PaintAttribute> PaintAttributes;
103
104 explicit QwtPlotTradingCurve( const QString &title = QString::null );
105 explicit QwtPlotTradingCurve( const QwtText &title );
106
107 virtual ~QwtPlotTradingCurve();
108
109 virtual int rtti() const;
110
111 void setPaintAttribute( PaintAttribute, bool on = true );
112 bool testPaintAttribute( PaintAttribute ) const;
113
114 void setSamples( const QVector<QwtOHLCSample> & );
115 void setSamples( QwtSeriesData<QwtOHLCSample> * );
116
117 void setSymbolStyle( SymbolStyle style );
118 SymbolStyle symbolStyle() const;
119
120 void setSymbolPen( const QColor &,
121 qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
122 void setSymbolPen( const QPen & );
123 QPen symbolPen() const;
124
125 void setSymbolBrush( Direction, const QBrush & );
126 QBrush symbolBrush( Direction ) const;
127
128 void setSymbolExtent( double width );
129 double symbolExtent() const;
130
131 void setMinSymbolWidth( double );
132 double minSymbolWidth() const;
133
134 void setMaxSymbolWidth( double );
135 double maxSymbolWidth() const;
136
137 virtual void drawSeries( QPainter *painter,
138 const QwtScaleMap &xMap, const QwtScaleMap &yMap,
139 const QRectF &canvasRect, int from, int to ) const;
140
141 virtual QRectF boundingRect() const;
142
143 virtual QwtGraphic legendIcon( int index, const QSizeF & ) const;
144
145protected:
146
147 void init();
148
149 virtual void drawSymbols( QPainter *,
150 const QwtScaleMap &xMap, const QwtScaleMap &yMap,
151 const QRectF &canvasRect, int from, int to ) const;
152
153 virtual void drawUserSymbol( QPainter *,
154 SymbolStyle, const QwtOHLCSample &,
155 Qt::Orientation, bool inverted, double width ) const;
156
157 void drawBar( QPainter *painter, const QwtOHLCSample &,
158 Qt::Orientation, bool inverted, double width ) const;
159
160 void drawCandleStick( QPainter *, const QwtOHLCSample &,
161 Qt::Orientation, double width ) const;
162
163 virtual double scaledSymbolWidth(
164 const QwtScaleMap &xMap, const QwtScaleMap &yMap,
165 const QRectF &canvasRect ) const;
166
167private:
168 class PrivateData;
169 PrivateData *d_data;
170};
171
172Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotTradingCurve::PaintAttributes )
173
174#endif
Note: See TracBrowser for help on using the repository browser.