nana::color Class Reference

Public Member Functions
	color ()=default
	color (colors)
	color (colors, double alpha)
	color (color_rgb)
	color (color_argb)
	color (color_rgba)
	color (unsigned red, unsigned green, unsigned blue, double alpha=1.0)
	color (std::string css_rgb)
	Initializes the color with a CSS-like rgb string. More...
color &	alpha (double)
	Sets alpha channel. More...
color &	from_rgb (unsigned red, unsigned green, unsigned blue)
	immutable alpha channel More...
color &	from_hsl (double hue, double saturation, double lightness)
	immutable alpha channel More...
color	blend (const color &blending_color, double fade_rate) const
	Blends color. More...
bool	invisible () const
	Determines whether the color is completely transparent. More...
pixel_color_t	px_color () const
pixel_argb_t	argb () const
pixel_rgba_t	rgba () const
const double &	r () const
const double &	g () const
const double &	b () const
const double &	a () const
bool	operator== (const color &other) const
bool	operator!= (const color &other) const

Friends
color	operator+ (const color &, const color &)

Detailed Description

Examples:

a_group_impl.cpp.

Constructor & Destructor Documentation

nana::color::color ( )

default

nana::color::color

(

colors

clr

)

nana::color::color	(	colors	clr,
		double	alpha
	)

nana::color::color

(

color_rgb

rgb

)

nana::color::color

(

color_argb

argb

)

nana::color::color

(

color_rgba

rgba

)

nana::color::color	(	unsigned	red,
		unsigned	green,
		unsigned	blue,
		double	alpha = 1.0
	)

nana::color::color ( std::string  css_rgb )

explicit

Initializes the color with a CSS-like rgb string.

Member Function Documentation

const double & nana::color::a

(

)

const

color & nana::color::alpha

(

double

al

)

Sets alpha channel.

pixel_argb_t nana::color::argb

(

)

const

const double & nana::color::b

(

)

const

color nana::color::blend	(	const color &	blending_color,
		double	fade_rate
	)		const

Blends color.

Returns a color which is blended as this * (1 - fade_rate) + blending_color * fade_rate

Parameters

blending_color	Color to blend
fade_rate	Blending rate for blending_color

Returns

a blended color

Examples:

a_group_impl.cpp.

color & nana::color::from_hsl	(	double	hue,
		double	saturation,
		double	lightness
	)

immutable alpha channel

Sets color with a HSL value.

Parameters

hue	in range of [0, 360]
saturation	in range of [0, 1]
lightness	in range of [0, 1]

color & nana::color::from_rgb	(	unsigned	red,
		unsigned	green,
		unsigned	blue
	)

immutable alpha channel

const double & nana::color::g

(

)

const

bool nana::color::invisible

(

)

const

Determines whether the color is completely transparent.

bool nana::color::operator!=

(

const color &

other

)

const

bool nana::color::operator==

(

const color &

other

)

const

pixel_color_t nana::color::px_color

(

)

const

const double & nana::color::r

(

)

const

pixel_rgba_t nana::color::rgba

(

)

const

Friends And Related Function Documentation

color operator+ ( const color &  x, const color &  y  )

friend