QwtAlphaColorMap - QwtAlphaColorMap varies the alpha value of a color.

NAME  SYNOPSIS  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtAlphaColorMap::QwtAlphaColorMap (const QColor & color = QColor( Qt::gray)) [explicit]  QwtAlphaColorMap::˜QwtAlphaColorMap () [virtual]  Member Function Documentation  int QwtAlphaColorMap::alpha1 () const  int QwtAlphaColorMap::alpha2 () const  QColor QwtAlphaColorMap::color () const  QRgb QwtAlphaColorMap::rgb (const QwtInterval & interval, double value)const [override], [virtual]  void QwtAlphaColorMap::setAlphaInterval (int alpha1, int alpha2)  void QwtAlphaColorMap::setColor (const QColor & color)  Author 

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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))
Constructor.
virtual ˜QwtAlphaColorMap ()
Destructor.
void setAlphaInterval (int alpha1, int alpha2)
int alpha1 () const
int alpha2 () const
void setColor (const QColor &)
QColor color () const
virtual QRgb rgb (const QwtInterval &, double value) const override
Map a value of a given interval into a alpha value.

Public Member Functions inherited from QwtColorMap

QwtColorMap (Format=QwtColorMap::RGB)
virtual ˜QwtColorMap ()
Destructor.
void setFormat (Format)
virtual uint colorIndex (int numColors, const QwtInterval &interval, double value) const
Map a value of a given interval into a color index.
QColor color (const QwtInterval &, double value) const
virtual QVector< QRgb > colorTable (int numColors) const
virtual QVector< QRgb > colorTable256 () const

Additional Inherited Members

Public Types inherited from QwtColorMap

enum Format { RGB, Indexed }

Public Attributes inherited from QwtColorMap

Format const

Detailed Description

QwtAlphaColorMap varies the alpha value of a color.

Definition at line 147 of file qwt_color_map.h.

Constructor & Destructor Documentation

QwtAlphaColorMap::QwtAlphaColorMap (const QColor & color = QColor( Qt::gray)) [explicit]

Constructor. The alpha interval is initialized by 0 to 255.

Parameters

color Color of the map

See also

setColor(), setAlphaInterval()

Definition at line 539 of file qwt_color_map.cpp.

QwtAlphaColorMap::˜QwtAlphaColorMap () [virtual]

Destructor.

Definition at line 547 of file qwt_color_map.cpp.

Member Function Documentation

int QwtAlphaColorMap::alpha1 () const

Returns

First alpha coordinate

See also

setAlphaInterval()

Definition at line 600 of file qwt_color_map.cpp.

int QwtAlphaColorMap::alpha2 () const

Returns

Second alpha coordinate

See also

setAlphaInterval()

Definition at line 609 of file qwt_color_map.cpp.

QColor QwtAlphaColorMap::color () const

Returns

the color

See also

setColor()

Definition at line 571 of file qwt_color_map.cpp.

QRgb QwtAlphaColorMap::rgb (const QwtInterval & interval, double value)const [override], [virtual]

Map a value of a given interval into a alpha value.

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 622 of file qwt_color_map.cpp.

void QwtAlphaColorMap::setAlphaInterval (int alpha1, int alpha2)

Set the interval for the alpha coordinate

alpha1/alpha2 need to be in the range 0 to 255, where 255 means opaque and 0 means transparent.

Parameters

alpha1 First alpha coordinate
alpha2 Second alpha coordinate

See also

alpha1(), alpha2()

Definition at line 587 of file qwt_color_map.cpp.

void QwtAlphaColorMap::setColor (const QColor & color)

Set the color

Parameters

color Color

See also

color()

Definition at line 558 of file qwt_color_map.cpp.

Author

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