QwtAlphaColorMap类 参考

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

#include <qwt_colormap.h>

类 QwtAlphaColorMap 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtAlphaColorMap (const QColor &=QColor(Qt::gray))
	Constructor.
void	setAlphaInterval (int alpha1, int alpha2)
	Set the interval for the alpha coordinate.
int	alpha1 () const
	Return first alpha coordinate.
int	alpha2 () const
	Return second alpha coordinate.
void	setColor (const QColor &)
	Set the color.
QColor	color () const
	Return the color.
virtual QRgb	rgb (double vMin, double vMax, double value) const override
	Map a value of a given interval into a alpha value.
Public 成员函数 继承自 QwtColorMap
	QwtColorMap (Format=QwtColorMap::RGB)
	Constructor.
virtual	~QwtColorMap ()
	Destructor.
void	setFormat (Format)
	Set the format of the color map.
Format	format () const
virtual uint	colorIndex (int numColors, double vMin, double vMax, double value) const
	Map a value of a given interval into a color index.
QColor	color (double vMin, double vMax, double value) const
virtual QVector< QRgb >	colorTable (int numColors) const
	Build and return a color map of arbitrary number of colors.
virtual QVector< QRgb >	colorTable256 () const
	Build and return a color map of 256 colors.

额外继承的成员函数
Public 类型 继承自 QwtColorMap
enum	Format { RGB , Indexed }
	Format for color mapping 更多...

详细描述

QwtAlphaColorMap varies the alpha value of a color.

构造及析构函数说明

QwtAlphaColorMap()

QwtAlphaColorMap::QwtAlphaColorMap ( const QColor &  color = QColor(Qt::gray) )

explicit

Constructor.

The alpha interval is initialized by 0 to 255.

参数

[in]

color

Color of the map.

参见

setColor(), setAlphaInterval()

成员函数说明

alpha1()

int QwtAlphaColorMap::alpha1

(

)

const

Return first alpha coordinate.

返回

First alpha coordinate.

参见

setAlphaInterval()

alpha2()

int QwtAlphaColorMap::alpha2

(

)

const

Return second alpha coordinate.

返回

Second alpha coordinate.

参见

setAlphaInterval()

color()

QColor QwtAlphaColorMap::color

(

)

const

Return the color.

返回

The color.

参见

setColor()

rgb()

QRgb QwtAlphaColorMap::rgb ( double  vMin, double  vMax, double  value  ) const

overridevirtual

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

参数

[in]	vMin	Minimum of the value interval.
[in]	vMax	Maximum of the value interval.
[in]	value	Value to map into a RGB value.

返回

RGB value, with an alpha value.

实现了 QwtColorMap.

setAlphaInterval()

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.

参数

[in]	alpha1	First alpha coordinate.
[in]	alpha2	Second alpha coordinate.

参见

alpha1(), alpha2()

setColor()

void QwtAlphaColorMap::setColor

(

const QColor &

color

)

Set the color.

参数

[in]

color

Color.

参见

color()

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该类的文档由以下文件生成:

• /home/runner/work/QWT/QWT/src/core/qwt_colormap.h
• /home/runner/work/QWT/QWT/src/core/qwt_colormap.cpp