QwtAlphaColorMap (3) - Linux Manuals

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 ))

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, 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)

Parameters:

color Color

See Also:

color()

Author

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