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33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/******************************************************************************
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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_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 3-dimensional 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_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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Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
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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 QWT_OVERRIDE;
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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 QWT_OVERRIDE;
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virtual QwtInterval boundingInterval( int scaleId ) const QWT_OVERRIDE;
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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 renderTileInfo( const QwtScaleMap&, const QwtScaleMap&,
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const QPointF& pole, TileInfo* ) const;
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class PrivateData;
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PrivateData* m_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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