QwtAlphaColorMap(3)

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

SYNOPSIS

#include <qwt_color_map.h>

Inherits QwtColorMap.

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

Detailed Description

QwtAlphaColorMap variies the alpha value of a color.

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()

  QwtColorMap * QwtAlphaColorMap::copy () const [virtual]

Clone the color map.

Implements QwtColorMap.

  QwtAlphaColorMap & QwtAlphaColorMap::operator= (const QwtAlphaColorMap & other)

Assignment operator

Parameters:
    other Other color map

Returns:
    *this

  QRgb QwtAlphaColorMap::rgb (const QwtDoubleInterval & 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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