Qwt User's Guide  6.1.6
qwt_series_data.h
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_SERIES_DATA_H
11 #define QWT_SERIES_DATA_H 1
12 
13 #include "qwt_global.h"
14 #include "qwt_samples.h"
15 #include "qwt_point_3d.h"
16 #include "qwt_point_polar.h"
17 #include <qvector.h>
18 #include <qrect.h>
19 
46 template <typename T>
48 {
49 public:
52 
54  virtual ~QwtSeriesData();
55 
56 #ifndef QWT_PYTHON_WRAPPER
57 
59  virtual size_t size() const = 0;
60 
66  virtual T sample( size_t i ) const = 0;
67 
80  virtual QRectF boundingRect() const = 0;
81 
82 #else
83  // Needed for generating the python bindings, but not for using them !
84  virtual size_t size() const { return 0; }
85  virtual T sample( size_t i ) const { return T(); }
86  virtual QRectF boundingRect() const { return d_boundingRect; }
87 #endif
88 
100  virtual void setRectOfInterest( const QRectF &rect );
101 
102 protected:
104  mutable QRectF d_boundingRect;
105 
106 private:
107  QwtSeriesData<T> &operator=( const QwtSeriesData<T> & );
108 };
109 
110 template <typename T>
112  d_boundingRect( 0.0, 0.0, -1.0, -1.0 )
113 {
114 }
115 
116 template <typename T>
118 {
119 }
120 
121 template <typename T>
123 {
124 }
125 
132 template <typename T>
134 {
135 public:
138 
143  QwtArraySeriesData( const QVector<T> &samples );
144 
149  void setSamples( const QVector<T> &samples );
150 
152  const QVector<T> samples() const;
153 
155  virtual size_t size() const;
156 
163  virtual T sample( size_t index ) const;
164 
165 protected:
167  QVector<T> d_samples;
168 };
169 
170 template <typename T>
172 {
173 }
174 
175 template <typename T>
176 QwtArraySeriesData<T>::QwtArraySeriesData( const QVector<T> &samples ):
177  d_samples( samples )
178 {
179 }
180 
181 template <typename T>
182 void QwtArraySeriesData<T>::setSamples( const QVector<T> &samples )
183 {
184  QwtSeriesData<T>::d_boundingRect = QRectF( 0.0, 0.0, -1.0, -1.0 );
185  d_samples = samples;
186 }
187 
188 template <typename T>
189 const QVector<T> QwtArraySeriesData<T>::samples() const
190 {
191  return d_samples;
192 }
193 
194 template <typename T>
196 {
197  return d_samples.size();
198 }
199 
200 template <typename T>
201 T QwtArraySeriesData<T>::sample( size_t i ) const
202 {
203  return d_samples[ static_cast<int>( i ) ];
204 }
205 
207 class QWT_EXPORT QwtPointSeriesData: public QwtArraySeriesData<QPointF>
208 {
209 public:
211  const QVector<QPointF> & = QVector<QPointF>() );
212 
213  virtual QRectF boundingRect() const;
214 };
215 
217 class QWT_EXPORT QwtPoint3DSeriesData: public QwtArraySeriesData<QwtPoint3D>
218 {
219 public:
221  const QVector<QwtPoint3D> & = QVector<QwtPoint3D>() );
222  virtual QRectF boundingRect() const;
223 };
224 
226 class QWT_EXPORT QwtIntervalSeriesData: public QwtArraySeriesData<QwtIntervalSample>
227 {
228 public:
230  const QVector<QwtIntervalSample> & = QVector<QwtIntervalSample>() );
231 
232  virtual QRectF boundingRect() const;
233 };
234 
236 class QWT_EXPORT QwtSetSeriesData: public QwtArraySeriesData<QwtSetSample>
237 {
238 public:
240  const QVector<QwtSetSample> & = QVector<QwtSetSample>() );
241 
242  virtual QRectF boundingRect() const;
243 };
244 
248 class QWT_EXPORT QwtTradingChartData: public QwtArraySeriesData<QwtOHLCSample>
249 {
250 public:
252  const QVector<QwtOHLCSample> & = QVector<QwtOHLCSample>() );
253 
254  virtual QRectF boundingRect() const;
255 };
256 
257 QWT_EXPORT QRectF qwtBoundingRect(
258  const QwtSeriesData<QPointF> &, int from = 0, int to = -1 );
259 
260 QWT_EXPORT QRectF qwtBoundingRect(
261  const QwtSeriesData<QwtPoint3D> &, int from = 0, int to = -1 );
262 
263 QWT_EXPORT QRectF qwtBoundingRect(
264  const QwtSeriesData<QwtPointPolar> &, int from = 0, int to = -1 );
265 
266 QWT_EXPORT QRectF qwtBoundingRect(
267  const QwtSeriesData<QwtIntervalSample> &, int from = 0, int to = -1 );
268 
269 QWT_EXPORT QRectF qwtBoundingRect(
270  const QwtSeriesData<QwtSetSample> &, int from = 0, int to = -1 );
271 
272 QWT_EXPORT QRectF qwtBoundingRect(
273  const QwtSeriesData<QwtOHLCSample> &, int from = 0, int to = -1 );
274 
330 template <typename T, typename LessThan>
331 inline int qwtUpperSampleIndex( const QwtSeriesData<T> &series,
332  double value, LessThan lessThan )
333 {
334  const int indexMax = series.size() - 1;
335 
336  if ( indexMax < 0 || !lessThan( value, series.sample( indexMax ) ) )
337  return -1;
338 
339  int indexMin = 0;
340  int n = indexMax;
341 
342  while ( n > 0 )
343  {
344  const int half = n >> 1;
345  const int indexMid = indexMin + half;
346 
347  if ( lessThan( value, series.sample( indexMid ) ) )
348  {
349  n = half;
350  }
351  else
352  {
353  indexMin = indexMid + 1;
354  n -= half + 1;
355  }
356  }
357 
358  return indexMin;
359 }
360 
361 #endif
QwtArraySeriesData::sample
virtual T sample(size_t index) const
Definition: qwt_series_data.h:201
QwtArraySeriesData::size
virtual size_t size() const
Definition: qwt_series_data.h:195
QwtArraySeriesData::samples
const QVector< T > samples() const
Definition: qwt_series_data.h:189
QwtSeriesData::sample
virtual T sample(size_t i) const =0
QwtSeriesData::size
virtual size_t size() const =0
QwtSeriesData::d_boundingRect
QRectF d_boundingRect
Can be used to cache a calculated bounding rectangle.
Definition: qwt_series_data.h:104
QwtSeriesData
Abstract interface for iterating over samples.
Definition: qwt_series_data.h:48
QwtPointSeriesData
Interface for iterating over an array of points.
Definition: qwt_series_data.h:208
QwtSeriesData::~QwtSeriesData
virtual ~QwtSeriesData()
Destructor.
Definition: qwt_series_data.h:117
QwtArraySeriesData::QwtArraySeriesData
QwtArraySeriesData(const QVector< T > &samples)
Definition: qwt_series_data.h:176
QwtArraySeriesData
Template class for data, that is organized as QVector.
Definition: qwt_series_data.h:134
QwtSeriesData::QwtSeriesData
QwtSeriesData()
Constructor.
Definition: qwt_series_data.h:111
QwtSetSeriesData
Interface for iterating over an array of samples.
Definition: qwt_series_data.h:237
QwtSeriesData::boundingRect
virtual QRectF boundingRect() const =0
QwtArraySeriesData::setSamples
void setSamples(const QVector< T > &samples)
Definition: qwt_series_data.h:182
QwtArraySeriesData::d_samples
QVector< T > d_samples
Vector of samples.
Definition: qwt_series_data.h:167
QwtIntervalSeriesData
Interface for iterating over an array of intervals.
Definition: qwt_series_data.h:227
QwtTradingChartData
Definition: qwt_series_data.h:249
QwtSeriesData::setRectOfInterest
virtual void setRectOfInterest(const QRectF &rect)
Definition: qwt_series_data.h:122
QwtPoint3DSeriesData
Interface for iterating over an array of 3D points.
Definition: qwt_series_data.h:218
QwtArraySeriesData::QwtArraySeriesData
QwtArraySeriesData()
Constructor.
Definition: qwt_series_data.h:171