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93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
3 weeks ago
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* QwtPolar Widget Library
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* Copyright (C) 2008 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_POLAR_SPECTROGRAM_H
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#define QWT_POLAR_SPECTROGRAM_H
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#include "qwt_polar_global.h"
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#include "qwt_polar_item.h"
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#include <qimage.h>
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class QwtRasterData;
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class QwtColorMap;
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/*!
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\brief An item, which displays a spectrogram
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A spectrogram displays threedimenional data, where the 3rd dimension
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( the intensity ) is displayed using colors. The colors are calculated
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from the values using a color map.
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\sa QwtRasterData, QwtColorMap
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*/
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class QWT_POLAR_EXPORT QwtPolarSpectrogram: public QwtPolarItem
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{
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public:
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/*!
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Attributes to modify the drawing algorithm.
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The default setting disables ApproximatedAtan
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\sa setPaintAttribute(), testPaintAttribute()
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*/
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enum PaintAttribute
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{
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/*!
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Use qwtFastAtan2 instead of atan2 for translating
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widget into polar coordinates.
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*/
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ApproximatedAtan = 0x01
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};
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//! Paint attributes
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typedef QFlags<PaintAttribute> PaintAttributes;
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explicit QwtPolarSpectrogram();
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virtual ~QwtPolarSpectrogram();
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void setData( QwtRasterData *data );
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const QwtRasterData *data() const;
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void setColorMap( QwtColorMap * );
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const QwtColorMap *colorMap() const;
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void setPaintAttribute( PaintAttribute, bool on = true );
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bool testPaintAttribute( PaintAttribute ) const;
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virtual int rtti() const;
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virtual void draw( QPainter *painter,
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const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
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const QPointF &pole, double radius,
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const QRectF &canvasRect ) const;
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virtual QwtInterval boundingInterval( int scaleId ) const;
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protected:
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virtual QImage renderImage(
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const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
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const QPointF &pole, const QRect &rect ) const;
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virtual void renderTile(
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const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
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const QPointF &pole, const QPoint &imagePos,
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const QRect &tile, QImage *image ) const;
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private:
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class TileInfo;
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void renderTile( const QwtScaleMap &, const QwtScaleMap &,
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const QPointF &pole, TileInfo * ) const;
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class PrivateData;
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PrivateData *d_data;
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarSpectrogram::PaintAttributes )
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#endif
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