qwt_plot_spectrogram.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   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_PLOT_SPECTROGRAM_H
#define QWT_PLOT_SPECTROGRAM_H

#include "qwt_global.h"
#include "qwt_raster_data.h"
#include "qwt_plot_rasteritem.h"

class QwtColorMap;
template <typename T> class QList;

class QWT_EXPORT QwtPlotSpectrogram: public QwtPlotRasterItem
{
public:
    enum DisplayMode
    {
        ImageMode = 0x01,

        ContourMode = 0x02
    };

    typedef QFlags<DisplayMode> DisplayModes;

    explicit QwtPlotSpectrogram( const QString &title = QString() );
    virtual ~QwtPlotSpectrogram();

    void setDisplayMode( DisplayMode, bool on = true );
    bool testDisplayMode( DisplayMode ) const;

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

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

    void setMaxRGBTableSize( int numColors );
    int maxRGBTableSize() const;

    virtual QwtInterval interval( Qt::Axis ) const QWT_OVERRIDE;
    virtual QRectF pixelHint( const QRectF & ) const QWT_OVERRIDE;

    void setDefaultContourPen( const QColor &,
        qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
    void setDefaultContourPen( const QPen & );
    QPen defaultContourPen() const;

    virtual QPen contourPen( double level ) const;

    void setConrecFlag( QwtRasterData::ConrecFlag, bool on );
    bool testConrecFlag( QwtRasterData::ConrecFlag ) const;

    void setContourLevels( const QList<double> & );
    QList<double> contourLevels() const;

    virtual int rtti() const QWT_OVERRIDE;

    virtual void draw( QPainter *,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect ) const QWT_OVERRIDE;

protected:
    virtual QImage renderImage(
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &area, const QSize &imageSize ) const QWT_OVERRIDE;

    virtual QSize contourRasterSize(
        const QRectF &, const QRect & ) const;

    virtual QwtRasterData::ContourLines renderContourLines(
        const QRectF &rect, const QSize &raster ) const;

    virtual void drawContourLines( QPainter *,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QwtRasterData::ContourLines& ) const;

    void renderTile( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRect &tile, QImage * ) const;

private:
    class PrivateData;
    PrivateData *d_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotSpectrogram::DisplayModes )

#endif