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

QwtAlphaColorMap - QwtAlphaColorMap varies the alpha value of a color.

#include <qwt_color_map.h>

Inherits QwtColorMap.


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.

QwtAlphaColorMap varies the alpha value of a color.

Constructor

Parameters:

color Color of the map

Returns:

the color

See also:

setColor()

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()

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

Wed Jan 2 2019 Version 6.1.4