qwtalphacolormap(3)

NAME

QwtAlphaColorMap

SYNOPSIS

Inherits QwtColorMap.

Detailed Description

QwtAlphaColorMap variies the alpha value of a color.

Definition at line 160 of file qwt_color_map.h.
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

Constructor & Destructor Documentation

QwtAlphaColorMap::QwtAlphaColorMap (const QColor & color =
QColor(Qt::gray))
Constructor
Parameters:
color Color of the map
Definition at line 409 of file qwt_color_map.cpp.
Referenced by copy().
QwtAlphaColorMap::QwtAlphaColorMap (const QwtAlphaColorMap & other)
Copy constructor
Parameters:
other Other color map
Definition at line 421 of file qwt_color_map.cpp.
QwtAlphaColorMap::~QwtAlphaColorMap () [virtual]
Destructor.
Definition at line 429 of file qwt_color_map.cpp.

Member Function Documentation

QwtAlphaColorMap & QwtAlphaColorMap::operator= (const QwtAlphaColorMap &
other)
Assignment operator
Parameters:
other Other color map
Returns:
*this
Definition at line 439 of file qwt_color_map.cpp.
References d_data.
QwtColorMap * QwtAlphaColorMap::copy () const [virtual]
Clone the color map.
Implements QwtColorMap.
Definition at line 448 of file qwt_color_map.cpp.
References QwtAlphaColorMap().
void QwtAlphaColorMap::setColor (const QColor & color)
Set the color
Parameters:
color Color
See also:
color()
Definition at line 462 of file qwt_color_map.cpp.
QColor QwtAlphaColorMap::color () const
Returns:
the color
See also:
setColor()
Definition at line 472 of file qwt_color_map.cpp.
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.
Definition at line 486 of file qwt_color_map.cpp.
References QwtDoubleInterval::minValue(), and
QwtDoubleInterval::width().

Author

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