source: ntrip/trunk/BNC/qwt/qwt_plot_spectrocurve.cpp@ 10105

Last change on this file since 10105 was 9383, checked in by stoecker, 4 years ago

update to qwt verion 6.1.1 to fix build with newer Qt5

File size: 7.6 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#include "qwt_plot_spectrocurve.h"
11#include "qwt_color_map.h"
12#include "qwt_scale_map.h"
13#include "qwt_painter.h"
14#include <qpainter.h>
15
16class QwtPlotSpectroCurve::PrivateData
17{
18public:
19 PrivateData():
20 colorRange( 0.0, 1000.0 ),
21 penWidth(0.0),
22 paintAttributes( QwtPlotSpectroCurve::ClipPoints )
23 {
24 colorMap = new QwtLinearColorMap();
25 }
26
27 ~PrivateData()
28 {
29 delete colorMap;
30 }
31
32 QwtColorMap *colorMap;
33 QwtInterval colorRange;
34 QVector<QRgb> colorTable;
35 double penWidth;
36 QwtPlotSpectroCurve::PaintAttributes paintAttributes;
37};
38
39/*!
40 Constructor
41 \param title Title of the curve
42*/
43QwtPlotSpectroCurve::QwtPlotSpectroCurve( const QwtText &title ):
44 QwtPlotSeriesItem( title )
45{
46 init();
47}
48
49/*!
50 Constructor
51 \param title Title of the curve
52*/
53QwtPlotSpectroCurve::QwtPlotSpectroCurve( const QString &title ):
54 QwtPlotSeriesItem( QwtText( title ) )
55{
56 init();
57}
58
59//! Destructor
60QwtPlotSpectroCurve::~QwtPlotSpectroCurve()
61{
62 delete d_data;
63}
64
65/*!
66 \brief Initialize data members
67*/
68void QwtPlotSpectroCurve::init()
69{
70 setItemAttribute( QwtPlotItem::Legend );
71 setItemAttribute( QwtPlotItem::AutoScale );
72
73 d_data = new PrivateData;
74 setData( new QwtPoint3DSeriesData() );
75
76 setZ( 20.0 );
77}
78
79//! \return QwtPlotItem::Rtti_PlotSpectroCurve
80int QwtPlotSpectroCurve::rtti() const
81{
82 return QwtPlotItem::Rtti_PlotSpectroCurve;
83}
84
85/*!
86 Specify an attribute how to draw the curve
87
88 \param attribute Paint attribute
89 \param on On/Off
90 /sa PaintAttribute, testPaintAttribute()
91*/
92void QwtPlotSpectroCurve::setPaintAttribute( PaintAttribute attribute, bool on )
93{
94 if ( on )
95 d_data->paintAttributes |= attribute;
96 else
97 d_data->paintAttributes &= ~attribute;
98}
99
100/*!
101 \return True, when attribute is enabled
102 \sa PaintAttribute, setPaintAttribute()
103*/
104bool QwtPlotSpectroCurve::testPaintAttribute( PaintAttribute attribute ) const
105{
106 return ( d_data->paintAttributes & attribute );
107}
108
109/*!
110 Initialize data with an array of samples.
111 \param samples Vector of points
112*/
113void QwtPlotSpectroCurve::setSamples( const QVector<QwtPoint3D> &samples )
114{
115 setData( new QwtPoint3DSeriesData( samples ) );
116}
117
118/*!
119 Assign a series of samples
120
121 setSamples() is just a wrapper for setData() without any additional
122 value - beside that it is easier to find for the developer.
123
124 \param data Data
125 \warning The item takes ownership of the data object, deleting
126 it when its not used anymore.
127*/
128void QwtPlotSpectroCurve::setSamples(
129 QwtSeriesData<QwtPoint3D> *data )
130{
131 setData( data );
132}
133
134/*!
135 Change the color map
136
137 Often it is useful to display the mapping between intensities and
138 colors as an additional plot axis, showing a color bar.
139
140 \param colorMap Color Map
141
142 \sa colorMap(), setColorRange(), QwtColorMap::color(),
143 QwtScaleWidget::setColorBarEnabled(), QwtScaleWidget::setColorMap()
144*/
145void QwtPlotSpectroCurve::setColorMap( QwtColorMap *colorMap )
146{
147 if ( colorMap != d_data->colorMap )
148 {
149 delete d_data->colorMap;
150 d_data->colorMap = colorMap;
151 }
152
153 legendChanged();
154 itemChanged();
155}
156
157/*!
158 \return Color Map used for mapping the intensity values to colors
159 \sa setColorMap(), setColorRange(), QwtColorMap::color()
160*/
161const QwtColorMap *QwtPlotSpectroCurve::colorMap() const
162{
163 return d_data->colorMap;
164}
165
166/*!
167 Set the value interval, that corresponds to the color map
168
169 \param interval interval.minValue() corresponds to 0.0,
170 interval.maxValue() to 1.0 on the color map.
171
172 \sa colorRange(), setColorMap(), QwtColorMap::color()
173*/
174void QwtPlotSpectroCurve::setColorRange( const QwtInterval &interval )
175{
176 if ( interval != d_data->colorRange )
177 {
178 d_data->colorRange = interval;
179
180 legendChanged();
181 itemChanged();
182 }
183}
184
185/*!
186 \return Value interval, that corresponds to the color map
187 \sa setColorRange(), setColorMap(), QwtColorMap::color()
188*/
189QwtInterval &QwtPlotSpectroCurve::colorRange() const
190{
191 return d_data->colorRange;
192}
193
194/*!
195 Assign a pen width
196
197 \param penWidth New pen width
198 \sa penWidth()
199*/
200void QwtPlotSpectroCurve::setPenWidth(double penWidth)
201{
202 if ( penWidth < 0.0 )
203 penWidth = 0.0;
204
205 if ( d_data->penWidth != penWidth )
206 {
207 d_data->penWidth = penWidth;
208
209 legendChanged();
210 itemChanged();
211 }
212}
213
214/*!
215 \return Pen width used to draw a dot
216 \sa setPenWidth()
217*/
218double QwtPlotSpectroCurve::penWidth() const
219{
220 return d_data->penWidth;
221}
222
223/*!
224 Draw a subset of the points
225
226 \param painter Painter
227 \param xMap Maps x-values into pixel coordinates.
228 \param yMap Maps y-values into pixel coordinates.
229 \param canvasRect Contents rectangle of the canvas
230 \param from Index of the first sample to be painted
231 \param to Index of the last sample to be painted. If to < 0 the
232 series will be painted to its last sample.
233
234 \sa drawDots()
235*/
236void QwtPlotSpectroCurve::drawSeries( QPainter *painter,
237 const QwtScaleMap &xMap, const QwtScaleMap &yMap,
238 const QRectF &canvasRect, int from, int to ) const
239{
240 if ( !painter || dataSize() <= 0 )
241 return;
242
243 if ( to < 0 )
244 to = dataSize() - 1;
245
246 if ( from < 0 )
247 from = 0;
248
249 if ( from > to )
250 return;
251
252 drawDots( painter, xMap, yMap, canvasRect, from, to );
253}
254
255/*!
256 Draw a subset of the points
257
258 \param painter Painter
259 \param xMap Maps x-values into pixel coordinates.
260 \param yMap Maps y-values into pixel coordinates.
261 \param canvasRect Contents rectangle of the canvas
262 \param from Index of the first sample to be painted
263 \param to Index of the last sample to be painted. If to < 0 the
264 series will be painted to its last sample.
265
266 \sa drawSeries()
267*/
268void QwtPlotSpectroCurve::drawDots( QPainter *painter,
269 const QwtScaleMap &xMap, const QwtScaleMap &yMap,
270 const QRectF &canvasRect, int from, int to ) const
271{
272 if ( !d_data->colorRange.isValid() )
273 return;
274
275 const bool doAlign = QwtPainter::roundingAlignment( painter );
276
277 const QwtColorMap::Format format = d_data->colorMap->format();
278 if ( format == QwtColorMap::Indexed )
279 d_data->colorTable = d_data->colorMap->colorTable( d_data->colorRange );
280
281 const QwtSeriesData<QwtPoint3D> *series = data();
282
283 for ( int i = from; i <= to; i++ )
284 {
285 const QwtPoint3D sample = series->sample( i );
286
287 double xi = xMap.transform( sample.x() );
288 double yi = yMap.transform( sample.y() );
289 if ( doAlign )
290 {
291 xi = qRound( xi );
292 yi = qRound( yi );
293 }
294
295 if ( d_data->paintAttributes & QwtPlotSpectroCurve::ClipPoints )
296 {
297 if ( !canvasRect.contains( xi, yi ) )
298 continue;
299 }
300
301 if ( format == QwtColorMap::RGB )
302 {
303 const QRgb rgb = d_data->colorMap->rgb(
304 d_data->colorRange, sample.z() );
305
306 painter->setPen( QPen( QColor::fromRgba( rgb ), d_data->penWidth ) );
307 }
308 else
309 {
310 const unsigned char index = d_data->colorMap->colorIndex(
311 d_data->colorRange, sample.z() );
312
313 painter->setPen( QPen( QColor::fromRgba( d_data->colorTable[index] ),
314 d_data->penWidth ) );
315 }
316
317 QwtPainter::drawPoint( painter, QPointF( xi, yi ) );
318 }
319
320 d_data->colorTable.clear();
321}
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