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))
       virtual ~QwtAlphaColorMap ()
           Destructor.
       void setColor (const QColor &)
       QColor color () const
       virtual QRgb rgb (const QwtInterval &, double value) const
           Map a value of a given interval into a alpha value.

   Additional Inherited Members

Detailed Description

       QwtAlphaColorMap varies the alpha value of a color.

Constructor & Destructor Documentation

   QwtAlphaColorMap::QwtAlphaColorMap (const QColor & color = QColor( Qt::gray ))
       Constructor

       Parameters:
           color Color of the map

Member Function Documentation

   QColor QwtAlphaColorMap::color () const
       Returns:
           the color

       See also:
           setColor()

   QRgb QwtAlphaColorMap::rgb (const QwtInterval & interval, double value) const [virtual]
       Map a value of a given interval into a alpha value. alpha := (value - interval.minValue())
       / interval.width();

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

       Returns:
           RGB value, with an alpha value

       Implements QwtColorMap.

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

       Parameters:
           color Color

       See also:
           color()

Author

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