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

NAME
       QwtAlphaColorMap - QwtAlphaColorMap varies the alpha value of a color.


SYNOPSIS
       #include <qwt_color_map.h>

       Inherits QwtColorMap.

   Public Member Functions
       QwtAlphaColorMap (const QColor &=QColor(Qt::gray))
           Constructor.
       virtual ~QwtAlphaColorMap ()
           Destructor.
       void setAlphaInterval (int alpha1, int alpha2)
       int alpha1 () const
       int alpha2 () const
       void setColor (const QColor &)
       QColor color () const
       virtual QRgb rgb (const QwtInterval &, double value) const override
           Map a value of a given interval into a alpha value.

   Additional Inherited Members

Detailed Description
       QwtAlphaColorMap varies the alpha value of a color.

       Definition at line 147 of file qwt_color_map.h.

Constructor & Destructor Documentation
   QwtAlphaColorMap::QwtAlphaColorMap (const QColor & color = QColor( Qt::gray
       )) [explicit]
       Constructor. The alpha interval is initialized by 0 to 255.

       Parameters
           color Color of the map

       See also
           setColor(), setAlphaInterval()

       Definition at line 539 of file qwt_color_map.cpp.

Member Function Documentation
   int QwtAlphaColorMap::alpha1 () const
       Returns
           First alpha coordinate

       See also
           setAlphaInterval()

       Definition at line 600 of file qwt_color_map.cpp.

   int QwtAlphaColorMap::alpha2 () const
       Returns
           Second alpha coordinate

       See also
           setAlphaInterval()

       Definition at line 609 of file qwt_color_map.cpp.

   QColor QwtAlphaColorMap::color () const
       Returns
           the color

       See also
           setColor()

       Definition at line 571 of file qwt_color_map.cpp.

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

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

       Returns
           RGB value, with an alpha value

       Implements QwtColorMap.

       Definition at line 622 of file qwt_color_map.cpp.

   void QwtAlphaColorMap::setAlphaInterval (int alpha1, int alpha2)
       Set the interval for the alpha coordinate

       alpha1/alpha2 need to be in the range 0 to 255, where 255 means opaque
       and 0 means transparent.

       Parameters
           alpha1 First alpha coordinate
           alpha2 Second alpha coordinate

       See also
           alpha1(), alpha2()

       Definition at line 587 of file qwt_color_map.cpp.

   void QwtAlphaColorMap::setColor (const QColor & color)
       Set the color

       Parameters
           color Color

       See also
           color()

       Definition at line 558 of file qwt_color_map.cpp.


Author
       Generated automatically by Doxygen for Qwt User's Guide from the source
       code.

Version 6.2.0                   Sun Jul 18 2021            QwtAlphaColorMap(3)