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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"
#include <qlist.h>
class QwtColorMap;
/*!
\brief A plot item, which displays a spectrogram
A spectrogram displays 3-dimensional data, where the 3rd dimension
( the intensity ) is displayed using colors. The colors are calculated
from the values using a color map.
On multi-core systems the performance of the image composition
can often be improved by dividing the area into tiles - each of them
rendered in a different thread ( see QwtPlotItem::setRenderThreadCount() ).
In ContourMode contour lines are painted for the contour levels.
\image html spectrogram3.png
\sa QwtRasterData, QwtColorMap, QwtPlotItem::setRenderThreadCount()
*/
class QWT_EXPORT QwtPlotSpectrogram: public QwtPlotRasterItem
{
public:
/*!
The display mode controls how the raster data will be represented.
\sa setDisplayMode(), testDisplayMode()
*/
enum DisplayMode
{
//! The values are mapped to colors using a color map.
ImageMode = 0x01,
//! The data is displayed using contour lines
ContourMode = 0x02
};
//! Display modes
typedef QFlags<DisplayMode> DisplayModes;
explicit QwtPlotSpectrogram( const QString &title = QString::null );
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;
virtual QwtInterval interval(Qt::Axis) const;
virtual QRectF pixelHint( const QRectF & ) const;
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;
virtual void draw( QPainter *p,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &rect ) const;
protected:
virtual QImage renderImage(
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &area, const QSize &imageSize ) const;
virtual QSize contourRasterSize(
const QRectF &, const QRect & ) const;
virtual QwtRasterData::ContourLines renderContourLines(
const QRectF &rect, const QSize &raster ) const;
virtual void drawContourLines( QPainter *p,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QwtRasterData::ContourLines& lines ) const;
void renderTile( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRect &imageRect, QImage *image ) const;
private:
class PrivateData;
PrivateData *d_data;
};
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotSpectrogram::DisplayModes )
#endif
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