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