QwtAlphaColorMap Class Reference

QwtAlphaColorMap varies the alpha value of a color. More...

#include <qwt_color_map.h>

Inheritance diagram for QwtAlphaColorMap:

Classes
class	PrivateData

Public Member Functions
int	alpha1 () const
int	alpha2 () const
QColor	color () const
	QwtAlphaColorMap (const QColor &=QColor(Qt::gray))
	Constructor. More...
virtual QRgb	rgb (const QwtInterval &, double value) const
	Map a value of a given interval into a alpha value. More...
void	setAlphaInterval (int alpha1, int alpha2)
void	setColor (const QColor &)
virtual	~QwtAlphaColorMap ()
	Destructor. More...
Public Member Functions inherited from QwtColorMap
QColor	color (const QwtInterval &, double value) const
virtual uint	colorIndex (int numColors, const QwtInterval &interval, double value) const
	Map a value of a given interval into a color index. More...
virtual QVector< QRgb >	colorTable (int numColors) const
virtual QVector< QRgb >	colorTable256 () const
Format	format () const
	QwtColorMap (Format=QwtColorMap::RGB)
void	setFormat (Format)
virtual	~QwtColorMap ()
	Destructor. More...

Private Attributes
PrivateData *	d_data

Additional Inherited Members
Public Types inherited from QwtColorMap
enum	Format { RGB, Indexed }

Detailed Description

QwtAlphaColorMap varies the alpha value of a color.

Definition at line 141 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 584 of file qwt_color_map.cpp.

QwtAlphaColorMap::~QwtAlphaColorMap ( )

virtual

Destructor.

Definition at line 592 of file qwt_color_map.cpp.

Member Function Documentation

int QwtAlphaColorMap::alpha1

(

)

const

Returns

First alpha coordinate

See also

setAlphaInterval()

Definition at line 645 of file qwt_color_map.cpp.

int QwtAlphaColorMap::alpha2

(

)

const

Returns

Second alpha coordinate

See also

setAlphaInterval()

Definition at line 654 of file qwt_color_map.cpp.

QColor QwtAlphaColorMap::color

(

)

const

Returns

the color

See also

setColor()

Definition at line 616 of file qwt_color_map.cpp.

QRgb QwtAlphaColorMap::rgb ( const QwtInterval &  interval, double  value  ) const

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 667 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 632 of file qwt_color_map.cpp.

void QwtAlphaColorMap::setColor

(

const QColor &

color

)

Set the color

Parameters

color

Color

See also

color()

Definition at line 603 of file qwt_color_map.cpp.

Member Data Documentation

PrivateData* QwtAlphaColorMap::d_data

private

Definition at line 158 of file qwt_color_map.h.

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The documentation for this class was generated from the following files:

• qwt_color_map.h
• qwt_color_map.cpp