For displaying 3D data on a 2D plane the 3rd dimension is often displayed using colors, like f.e in a spectrogram.
Each color map is optimized to return colors for only one of the following image formats:
Definition at line 44 of file qwt_color_map.h.
Public Types | |
enum | Format { RGB, Indexed } |
Public Member Functions | |
QwtColorMap (Format=QwtColorMap::RGB) | |
virtual | ~QwtColorMap () |
Format | format () const |
virtual QwtColorMap * | copy () const =0 |
virtual QRgb | rgb (const QwtDoubleInterval &interval, double value) const =0 |
virtual unsigned char | colorIndex (const QwtDoubleInterval &interval, double value) const =0 |
QColor | color (const QwtDoubleInterval &, double value) const |
virtual QVector< QRgb > | colorTable (const QwtDoubleInterval &) const |
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Definition at line 57 of file qwt_color_map.h. |
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Constructor.
Definition at line 164 of file qwt_color_map.cpp. |
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Destructor.
Definition at line 170 of file qwt_color_map.cpp. |
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Map a value into a color
Definition at line 198 of file qwt_color_map.h. References colorIndex(), colorTable(), and rgb(). |
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Map a value of a given interval into a color index
Implemented in QwtLinearColorMap. Referenced by color(), and QwtPainter::drawColorBar(). |
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Build and return a color map of 256 colors The color table is needed for rendering indexed images in combination with using colorIndex().
Definition at line 183 of file qwt_color_map.cpp. References QwtDoubleInterval::isValid(), QwtDoubleInterval::minValue(), rgb(), and QwtDoubleInterval::width(). Referenced by color(), and QwtPainter::drawColorBar(). |
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Clone the color map.
Implemented in QwtLinearColorMap, and QwtAlphaColorMap. Referenced by QwtScaleWidget::setColorMap(), and QwtPlotSpectrogram::setColorMap(). |
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Definition at line 216 of file qwt_color_map.h. Referenced by QwtPainter::drawColorBar(). |
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Map a value of a given interval into a rgb value.
Implemented in QwtLinearColorMap, and QwtAlphaColorMap. Referenced by color(), colorTable(), and QwtPainter::drawColorBar(). |