DOKK / manpages / debian 10 / libqwt5-doc / QwtAlphaColorMap.3.en
QwtAlphaColorMap(3) Qwt User's Guide QwtAlphaColorMap(3)

QwtAlphaColorMap -

#include <qwt_color_map.h>

Inherits QwtColorMap.


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

QwtAlphaColorMap variies the alpha value of a color.

Constructor

Parameters:

color Color of the map

Copy constructor

Parameters:

other Other color map

Returns:

the color

See also:

setColor()

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

Assignment operator

Parameters:

other Other color map

Returns:

*this

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.

Set the color

Parameters:

color Color

See also:

color()

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Tue Nov 20 2012 Version 5.2.3