119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 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_PLOT_SPECTROGRAM_H
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#define QWT_PLOT_SPECTROGRAM_H
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#include "qwt_global.h"
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#include "qwt_raster_data.h"
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#include "qwt_plot_rasteritem.h"
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#include <qlist.h>
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class QwtColorMap;
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/*!
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\brief A plot 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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On multi-core systems the performance of the image composition
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can often be improved by dividing the area into tiles - each of them
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rendered in a different thread ( see QwtPlotItem::setRenderThreadCount() ).
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In ContourMode contour lines are painted for the contour levels.
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\image html spectrogram3.png
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\sa QwtRasterData, QwtColorMap, QwtPlotItem::setRenderThreadCount()
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*/
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class QWT_EXPORT QwtPlotSpectrogram: public QwtPlotRasterItem
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{
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public:
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/*!
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The display mode controls how the raster data will be represented.
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\sa setDisplayMode(), testDisplayMode()
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*/
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enum DisplayMode
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{
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//! The values are mapped to colors using a color map.
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ImageMode = 0x01,
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//! The data is displayed using contour lines
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ContourMode = 0x02
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};
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//! Display modes
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typedef QFlags<DisplayMode> DisplayModes;
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explicit QwtPlotSpectrogram( const QString &title = QString::null );
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virtual ~QwtPlotSpectrogram();
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void setDisplayMode( DisplayMode, bool on = true );
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bool testDisplayMode( DisplayMode ) const;
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void setData( QwtRasterData *data );
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const QwtRasterData *data() const;
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QwtRasterData *data();
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void setColorMap( QwtColorMap * );
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const QwtColorMap *colorMap() const;
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virtual QwtInterval interval(Qt::Axis) const;
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virtual QRectF pixelHint( const QRectF & ) const;
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void setDefaultContourPen( const QColor &,
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qreal width = 0.0, Qt::PenStyle = Qt::SolidLine );
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void setDefaultContourPen( const QPen & );
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QPen defaultContourPen() const;
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virtual QPen contourPen( double level ) const;
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void setConrecFlag( QwtRasterData::ConrecFlag, bool on );
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bool testConrecFlag( QwtRasterData::ConrecFlag ) const;
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void setContourLevels( const QList<double> & );
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QList<double> contourLevels() const;
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virtual int rtti() const;
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virtual void draw( QPainter *p,
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRectF &rect ) const;
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protected:
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virtual QImage renderImage(
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRectF &area, const QSize &imageSize ) const;
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virtual QSize contourRasterSize(
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const QRectF &, const QRect & ) const;
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virtual QwtRasterData::ContourLines renderContourLines(
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const QRectF &rect, const QSize &raster ) const;
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virtual void drawContourLines( QPainter *p,
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QwtRasterData::ContourLines& lines ) const;
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void renderTile( const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRect &imageRect, QImage *image ) const;
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private:
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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( QwtPlotSpectrogram::DisplayModes )
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#endif
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