QwtHueColorMap(3)              Qwt User's Guide              QwtHueColorMap(3)

NAME
       QwtHueColorMap - QwtHueColorMap varies the hue value of the HSV color
       model.


SYNOPSIS
       #include <qwt_color_map.h>

       Inherits QwtColorMap.

   Public Member Functions
       QwtHueColorMap (QwtColorMap::Format=QwtColorMap::RGB)
           Constructor.
       virtual ~QwtHueColorMap ()
           Destructor.
       void setHueInterval (int hue1, int hue2)
       void setSaturation (int saturation)
           Set the the saturation coordinate.
       void setValue (int value)
           Set the the value coordinate.
       void setAlpha (int alpha)
           Set the the alpha coordinate.
       int hue1 () const
       int hue2 () const
       int saturation () const
       int value () const
       int alpha () const
       virtual QRgb rgb (const QwtInterval &, double value) const override

   Additional Inherited Members

Detailed Description
       QwtHueColorMap varies the hue value of the HSV color model.

       QwtHueColorMap can be used to set up a color map easily, that runs
       cyclic over all colors. Each cycle has 360 different steps.

       The values for value and saturation are in the range of 0 to 255 and
       doesn't depend on the data value to be mapped.

       See also
           QwtSaturationValueColorMap

       Definition at line 180 of file qwt_color_map.h.

Constructor & Destructor Documentation
   QwtHueColorMap::QwtHueColorMap (QwtColorMap::Format format =
       QwtColorMap::RGB) [explicit]
       Constructor. The hue interval is initialized by 0 to 359. All other
       coordinates are set to 255.

       Parameters
           format Format of the color map

       See also
           setHueInterval(), setSaturation(), setValue(), setValue()

       Definition at line 723 of file qwt_color_map.cpp.

Member Function Documentation
   int QwtHueColorMap::alpha () const
       Returns
           Alpha coordinate

       See also
           setAlpha()

       Definition at line 856 of file qwt_color_map.cpp.

   int QwtHueColorMap::hue1 () const
       Returns
           First hue coordinate

       See also
           setHueInterval()

       Definition at line 820 of file qwt_color_map.cpp.

   int QwtHueColorMap::hue2 () const
       Returns
           Second hue coordinate

       See also
           setHueInterval()

       Definition at line 829 of file qwt_color_map.cpp.

   QRgb QwtHueColorMap::rgb (const QwtInterval & interval, double value) const
       [override],  [virtual]
       Map a value of a given interval into a RGB value

       Parameters
           interval Range for all values
           value Value to map into a RGB value

       Returns
           RGB value for value

       Implements QwtColorMap.

       Definition at line 869 of file qwt_color_map.cpp.

   int QwtHueColorMap::saturation () const
       Returns
           Saturation coordinate

       See also
           setSaturation()

       Definition at line 838 of file qwt_color_map.cpp.

   void QwtHueColorMap::setAlpha (int alpha)
       Set the the alpha coordinate. alpha needs to be in the range 0 to 255,
       where 255 means opaque and 0 means transparent.

       Parameters
           alpha Alpha coordinate

       See also
           alpha()

       Definition at line 805 of file qwt_color_map.cpp.

   void QwtHueColorMap::setHueInterval (int hue1, int hue2)
       Set the interval for the hue coordinate

       hue1/hue2 need to be positive number and can be > 360 to define cycles.
       F.e. 420 to 240 defines a map yellow/red/magenta/blue.

       Parameters
           hue1 First hue coordinate
           hue2 Second hue coordinate

       See also
           hue1(), hue2()

       Definition at line 746 of file qwt_color_map.cpp.

   void QwtHueColorMap::setSaturation (int saturation)
       Set the the saturation coordinate. saturation needs to be in the range
       0 to 255,

       Parameters
           saturation Saturation coordinate

       See also
           saturation()

       Definition at line 764 of file qwt_color_map.cpp.

   void QwtHueColorMap::setValue (int value)
       Set the the value coordinate. value needs to be in the range 0 to 255,

       Parameters
           value Value coordinate

       See also
           value()

       Definition at line 784 of file qwt_color_map.cpp.

   int QwtHueColorMap::value () const
       Returns
           Value coordinate

       See also
           setValue()

       Definition at line 847 of file qwt_color_map.cpp.


Author
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       code.

Version 6.2.0                   Sun Jul 18 2021              QwtHueColorMap(3)