QwtAlphaColorMap (3) Linux Manual Page
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 ))
Constructor 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)
Set the color Parameters:
- color Color
See Also:
- color()