qwt_polar_spectrogram.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * QwtPolar Widget Library
 * Copyright (C) 2008   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_POLAR_SPECTROGRAM_H
#define QWT_POLAR_SPECTROGRAM_H

#include "qwt_global.h"
#include "qwt_polar_item.h"
#include <qimage.h>

class QwtRasterData;
class QwtColorMap;

class QWT_EXPORT QwtPolarSpectrogram: public QwtPolarItem
{
public:
    enum PaintAttribute
    {
        ApproximatedAtan = 0x01
    };

    typedef QFlags<PaintAttribute> PaintAttributes;

    explicit QwtPolarSpectrogram();
    virtual ~QwtPolarSpectrogram();

    void setData( QwtRasterData *data );
    const QwtRasterData *data() const;

    void setColorMap( QwtColorMap * );
    const QwtColorMap *colorMap() const;

    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;

    virtual int rtti() const QWT_OVERRIDE;

    virtual void draw( QPainter *painter,
        const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
        const QPointF &pole, double radius,
        const QRectF &canvasRect ) const QWT_OVERRIDE;

    virtual QwtInterval boundingInterval( int scaleId ) const QWT_OVERRIDE;

protected:
    virtual QImage renderImage(
        const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
        const QPointF &pole, const QRect &rect ) const;

    virtual void renderTile(
        const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
        const QPointF &pole, const QPoint &imagePos,
        const QRect &tile, QImage *image ) const;

private:
    class TileInfo;
    void renderTile( const QwtScaleMap &, const QwtScaleMap &,
        const QPointF &pole, TileInfo * ) const;

    class PrivateData;
    PrivateData *d_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPolarSpectrogram::PaintAttributes )

#endif