source: ntrip/branches/BNC_2.12/qwtpolar/qwt_polar_spectrogram.h@ 8142

Last change on this file since 8142 was 4272, checked in by mervart, 10 years ago
File size: 2.6 KB
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1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * QwtPolar Widget Library
3 * Copyright (C) 2008 Uwe Rathmann
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the Qwt License, Version 1.0
7 *****************************************************************************/
8
9#ifndef QWT_POLAR_SPECTROGRAM_H
10#define QWT_POLAR_SPECTROGRAM_H
11
12#include "qwt_polar_global.h"
13#include "qwt_polar_item.h"
14#include <qimage.h>
15
16class QwtRasterData;
17class QwtColorMap;
18
19/*!
20 \brief An item, which displays a spectrogram
21
22 A spectrogram displays threedimenional data, where the 3rd dimension
23 ( the intensity ) is displayed using colors. The colors are calculated
24 from the values using a color map.
25
26 \sa QwtRasterData, QwtColorMap
27*/
28class QWT_POLAR_EXPORT QwtPolarSpectrogram: public QwtPolarItem
29{
30public:
31 /*!
32 Attributes to modify the drawing algorithm.
33 The default setting disables ApproximatedAtan
34
35 \sa setPaintAttribute(), testPaintAttribute()
36 */
37 enum PaintAttribute
38 {
39 /*!
40 Use qwtFastAtan2 instead of atan2 for translating
41 widget into polar coordinates.
42 */
43
44 ApproximatedAtan = 0x01
45 };
46
47 //! Paint attributes
48 typedef QFlags<PaintAttribute> PaintAttributes;
49
50 explicit QwtPolarSpectrogram();
51 virtual ~QwtPolarSpectrogram();
52
53 void setData( QwtRasterData *data );
54 const QwtRasterData *data() const;
55
56 void setColorMap( QwtColorMap * );
57 const QwtColorMap *colorMap() const;
58
59 void setPaintAttribute( PaintAttribute, bool on = true );
60 bool testPaintAttribute( PaintAttribute ) const;
61
62 void setRenderThreadCount( uint numThreads );
63 uint renderThreadCount() const;
64
65 virtual int rtti() const;
66
67 virtual void draw( QPainter *painter,
68 const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
69 const QPointF &pole, double radius,
70 const QRectF &canvasRect ) const;
71
72 virtual QwtInterval boundingInterval( int scaleId ) const;
73
74protected:
75 virtual QImage renderImage(
76 const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
77 const QPointF &pole, const QRect &rect ) const;
78
79 virtual void renderTile(
80 const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
81 const QPointF &pole, const QPoint &imagePos,
82 const QRect &tile, QImage *image ) const;
83
84private:
85 class TileInfo;
86 void renderTile( const QwtScaleMap &, const QwtScaleMap &,
87 const QPointF &pole, TileInfo * ) const;
88
89 class PrivateData;
90 PrivateData *d_data;
91};
92
93Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarSpectrogram::PaintAttributes )
94
95#endif
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