qwtalphacolormap(3) [debian man page]

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

NAME

       QwtAlphaColorMap -

       QwtAlphaColorMap variies the alpha value of a color.

SYNOPSIS

       #include <qwt_color_map.h>

       Inherits QwtColorMap.

   Public Types
       enum Format { RGB, Indexed }

   Public Member Functions
       QColor color () const
       QColor color (const QwtDoubleInterval &, double value) const
       virtual QVector< QRgb > colorTable (const QwtDoubleInterval &) const
       virtual QwtColorMap * copy () const
       Format format () const
       QwtAlphaColorMap & operator= (const QwtAlphaColorMap &)
       QwtAlphaColorMap (const QColor &=QColor(Qt::gray))
       QwtAlphaColorMap (const QwtAlphaColorMap &)
       virtual QRgb rgb (const QwtDoubleInterval &, double value) const
       void setColor (const QColor &)
       virtual ~QwtAlphaColorMap ()

Detailed Description
       QwtAlphaColorMap variies the alpha value of a color.

Member Enumeration Documentation
   enum QwtColorMap::Format [inherited] .IP o 2
       RGB
	The map is intended to map into QRgb values.

       o Indexed
	  The map is intended to map into 8 bit values, that are indices into the color table.

       See also:
	   rgb(), colorIndex(), colorTable()

Constructor &; Destructor Documentation
   QwtAlphaColorMap::QwtAlphaColorMap (const QColor &color = QColor(Qt::gray)) Constructor
       Parameters:
	   color Color of the map

   QwtAlphaColorMap::QwtAlphaColorMap (const QwtAlphaColorMap &other) Copy constructor
       Parameters:
	   other Other color map

   QwtAlphaColorMap::~QwtAlphaColorMap () [virtual]
       Destructor.

Member Function Documentation
   QColor QwtAlphaColorMap::color () const Returns:
	   the color

       See also:
	   setColor()

   QColor QwtColorMap::color (const QwtDoubleInterval &interval, doublevalue) const [inline, inherited] Map a value into a color
       Parameters:
	   interval Valid interval for values
	   value Value

       Returns:
	   Color corresponding to value

       Warning:
	   This method is slow for Indexed color maps. If it is necessary to map many values, its better to get the color table once and find the
	   color using colorIndex().

   QwtColorTable QwtColorMap::colorTable (const QwtDoubleInterval &interval) const [virtual, inherited] Build and return a color map of 256 colors
       The color table is needed for rendering indexed images in combination with using colorIndex().

       Parameters:
	   interval Range for the values

       Returns:
	   A color table, that can be used for a QImage

   QwtColorMap * QwtAlphaColorMap::copy () const [virtual]
       Clone the color map.

       Implements QwtColorMap.

   QwtColorMap::Format QwtColorMap::format () const [inline, inherited] Returns:
	   Intended format of the color map

       See also:
	   Format

   QwtAlphaColorMap & QwtAlphaColorMap::operator= (const QwtAlphaColorMap &other) Assignment operator
       Parameters:
	   other Other color map

       Returns:
	   *this

   QRgb QwtAlphaColorMap::rgb (const QwtDoubleInterval &interval, doublevalue) 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
       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 5.2.2							  Mon Aug 1 2011					       QwtAlphaColorMap(3)