nana::drawing Class Reference

Draw pictures on a widget by specifying a drawing method that will be employed every time the widget refreshes. More...

Inheritance diagram for nana::drawing:

Public Types
using	diehard_t = draw_fn_handle *
	A handle to a drawing method. More...
using	draw_fn_t = std::function< void(paint::graphics &)>
	A function to draw. More...

Public Member Functions
	drawing (window w)
	Create a drawing object for a widget w. More...
virtual	~drawing ()
	Just for polymorphism. More...
bool	empty () const
	Returns true if the drawing object is invalid. More...
void	update () const
void	draw (const draw_fn_t &)
	Draws things that are defined by draw_fn_t. More...
void	draw (draw_fn_t &&)
	Draws things that are defined by draw_fn_t. More...
diehard_t	draw_diehard (const draw_fn_t &)
	Draws things that are defined by draw_fn_t but will not be deleted when clear() is called. More...
diehard_t	draw_diehard (draw_fn_t &&)
	Draws things that are defined by draw_fn_t but will not be deleted when clear() is called. More...
void	erase (diehard_t)
	Erases a diehard drawing method. More...
void	clear ()
	Erases all. More...

Detailed Description

Draw pictures on a widget by specifying a drawing method that will be employed every time the widget refreshes.

By the end of drawing, the picture may not be displayed immediately. If a picture need to be displayed immediately call nana::gui::API::refresh_window() .

Examples:

a_group_impl.cpp, background-effects.cpp, draw.cpp, and stretch_image.cpp.

Member Typedef Documentation

using nana::drawing::diehard_t = draw_fn_handle *

A handle to a drawing method.

using nana::drawing::draw_fn_t = std::function<void(paint::graphics&)>

A function to draw.

Constructor & Destructor Documentation

nana::drawing::drawing

(

window

w

)

Create a drawing object for a widget w.

nana::drawing::~drawing ( )

virtual

Just for polymorphism.

Member Function Documentation

void nana::drawing::clear

(

)

Erases all.

void nana::drawing::draw

(

const draw_fn_t &

f

)

Draws things that are defined by draw_fn_t.

Examples:

a_group_impl.cpp, background-effects.cpp, and draw.cpp.

void nana::drawing::draw

(

draw_fn_t &&

f

)

Draws things that are defined by draw_fn_t.

drawing::diehard_t nana::drawing::draw_diehard

(

const draw_fn_t &

f

)

Draws things that are defined by draw_fn_t but will not be deleted when clear() is called.

drawing::diehard_t nana::drawing::draw_diehard

(

draw_fn_t &&

f

)

Draws things that are defined by draw_fn_t but will not be deleted when clear() is called.

bool nana::drawing::empty

(

)

const

Returns true if the drawing object is invalid.

void nana::drawing::erase

(

diehard_t

d

)

Erases a diehard drawing method.

void nana::drawing::update

(

)

const

Examples:

background-effects.cpp, and draw.cpp.