#include <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 |
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:
| enum QwtColorMap::Format |
| QwtColorMap::QwtColorMap | ( | Format | format = QwtColorMap::RGB |
) |
Constructor.
| QwtColorMap::~QwtColorMap | ( | ) | [virtual] |
Destructor.
| QColor QwtColorMap::color | ( | const QwtDoubleInterval & | interval, | |
| double | value | |||
| ) | const [inline] |
Map a value into a color
| interval | Valid interval for values | |
| value | Value |
| virtual unsigned char QwtColorMap::colorIndex | ( | const QwtDoubleInterval & | interval, | |
| double | value | |||
| ) | const [pure virtual] |
Map a value of a given interval into a color index
| interval | Range for the values | |
| value | Value |
Implemented in QwtLinearColorMap.
| QwtColorTable QwtColorMap::colorTable | ( | const QwtDoubleInterval & | interval | ) | const [virtual] |
Build and return a color map of 256 colors
The color table is needed for rendering indexed images in combination with using colorIndex().
| interval | Range for the values |
| virtual QwtColorMap* QwtColorMap::copy | ( | ) | const [pure virtual] |
| QwtColorMap::Format QwtColorMap::format | ( | ) | const [inline] |
| virtual QRgb QwtColorMap::rgb | ( | const QwtDoubleInterval & | interval, | |
| double | value | |||
| ) | const [pure virtual] |
Map a value of a given interval into a rgb value.
| interval | Range for the values | |
| value | Value |
Implemented in QwtLinearColorMap, and QwtAlphaColorMap.
1.5.8