Canvas Struct Reference

Public Types
using	Stylizer = std::function< void(Pixel &)>

Public Member Functions
	Canvas ()=default
	Canvas (int width, int height)
	Constructor. More...
int	width () const
int	height () const
Pixel	GetPixel (int x, int y) const
	Get the content of a cell. More...
void	DrawPointOn (int x, int y)
	Draw a braille dot. More...
void	DrawPointOff (int x, int y)
	Erase a braille dot. More...
void	DrawPointToggle (int x, int y)
	Toggle a braille dot. A filled one will be erased, and the other will be drawn. More...
void	DrawPoint (int x, int y, bool value)
	Draw a braille dot. More...
void	DrawPoint (int x, int y, bool value, const Stylizer &s)
	Draw a braille dot. More...
void	DrawPoint (int x, int y, bool value, const Color &color)
	Draw a braille dot. More...
void	DrawPointLine (int x1, int y1, int x2, int y2)
	Draw a line made of braille dots. More...
void	DrawPointLine (int x1, int y1, int x2, int y2, const Stylizer &s)
	Draw a line made of braille dots. More...
void	DrawPointLine (int x1, int y1, int x2, int y2, const Color &color)
	Draw a line made of braille dots. More...
void	DrawPointCircle (int x, int y, int radius)
	Draw a circle made of braille dots. More...
void	DrawPointCircle (int x, int y, int radius, const Stylizer &s)
	Draw a circle made of braille dots. More...
void	DrawPointCircle (int x, int y, int radius, const Color &color)
	Draw a circle made of braille dots. More...
void	DrawPointCircleFilled (int x, int y, int radius)
	Draw a filled circle made of braille dots. More...
void	DrawPointCircleFilled (int x, int y, int radius, const Stylizer &s)
	Draw a filled circle made of braille dots. More...
void	DrawPointCircleFilled (int x, int y, int radius, const Color &color)
	Draw a filled circle made of braille dots. More...
void	DrawPointEllipse (int x, int y, int r1, int r2)
	Draw an ellipse made of braille dots. More...
void	DrawPointEllipse (int x, int y, int r1, int r2, const Color &color)
	Draw an ellipse made of braille dots. More...
void	DrawPointEllipse (int x, int y, int r1, int r2, const Stylizer &s)
	Draw an ellipse made of braille dots. More...
void	DrawPointEllipseFilled (int x, int y, int r1, int r2)
	Draw a filled ellipse made of braille dots. More...
void	DrawPointEllipseFilled (int x, int y, int r1, int r2, const Color &color)
	Draw a filled ellipse made of braille dots. More...
void	DrawPointEllipseFilled (int x, int y, int r1, int r2, const Stylizer &s)
	Draw a filled ellipse made of braille dots. More...
void	DrawBlockOn (int x, int y)
	Draw a block. More...
void	DrawBlockOff (int x, int y)
	Erase a block. More...
void	DrawBlockToggle (int x, int y)
	Toggle a block. If it is filled, it will be erased. If it is empty, it will be filled. More...
void	DrawBlock (int x, int y, bool value)
	Draw a block. More...
void	DrawBlock (int x, int y, bool value, const Stylizer &s)
	Draw a block. More...
void	DrawBlock (int x, int y, bool value, const Color &color)
	Draw a block. More...
void	DrawBlockLine (int x1, int y1, int x2, int y2)
	Draw a line made of block characters. More...
void	DrawBlockLine (int x1, int y1, int x2, int y2, const Stylizer &s)
	Draw a line made of block characters. More...
void	DrawBlockLine (int x1, int y1, int x2, int y2, const Color &color)
	Draw a line made of block characters. More...
void	DrawBlockCircle (int x1, int y1, int radius)
	Draw a circle made of block characters. More...
void	DrawBlockCircle (int x1, int y1, int radius, const Stylizer &s)
	Draw a circle made of block characters. More...
void	DrawBlockCircle (int x1, int y1, int radius, const Color &color)
	Draw a circle made of block characters. More...
void	DrawBlockCircleFilled (int x1, int y1, int radius)
	Draw a filled circle made of block characters. More...
void	DrawBlockCircleFilled (int x1, int y1, int radius, const Stylizer &s)
	Draw a filled circle made of block characters. More...
void	DrawBlockCircleFilled (int x1, int y1, int radius, const Color &color)
	Draw a filled circle made of block characters. More...
void	DrawBlockEllipse (int x1, int y1, int r1, int r2)
	Draw an ellipse made of block characters. More...
void	DrawBlockEllipse (int x1, int y1, int r1, int r2, const Stylizer &s)
	Draw an ellipse made of block characters. More...
void	DrawBlockEllipse (int x1, int y1, int r1, int r2, const Color &color)
	Draw an ellipse made of block characters. More...
void	DrawBlockEllipseFilled (int x1, int y1, int r1, int r2)
	Draw a filled ellipse made of block characters. More...
void	DrawBlockEllipseFilled (int x1, int y1, int r1, int r2, const Stylizer &s)
	Draw a filled ellipse made of block characters. More...
void	DrawBlockEllipseFilled (int x1, int y1, int r1, int r2, const Color &color)
	Draw a filled ellipse made of block characters. More...
void	DrawText (int x, int y, const std::string &value)
	Draw a piece of text. More...
void	DrawText (int x, int y, const std::string &value, const Color &color)
	Draw a piece of text. More...
void	DrawText (int x, int y, const std::string &value, const Stylizer &style)
	Draw a piece of text. More...
void	Style (int x, int y, const Stylizer &style)
	Modify a pixel at a given location. More...

Detailed Description

Examples

examples/component/canvas_animated.cpp, and examples/dom/canvas.cpp.

Definition at line 23 of file canvas.hpp.

Member Typedef Documentation

Stylizer

using Stylizer = std::function<void(Pixel&)>

Definition at line 33 of file canvas.hpp.

Constructor & Destructor Documentation

Canvas() [1/2]

Canvas ( )

default

Canvas() [2/2]

Canvas	(	int	width,
		int	height
	)

Constructor.

Parameters

width	the width of the canvas. A cell is a 2x4 braille dot.
height	the height of the canvas. A cell is a 2x4 braille dot.

Definition at line 87 of file canvas.cpp.

Member Function Documentation

width()

int width ( ) const

inline

Definition at line 29 of file canvas.hpp.

height()

int height ( ) const

inline

Definition at line 30 of file canvas.hpp.

GetPixel()

Pixel GetPixel	(	int	x,
		int	y
	)		const

Get the content of a cell.

Parameters

x	the x coordinate of the cell.
y	the y coordinate of the cell.

Definition at line 95 of file canvas.cpp.

DrawPointOn()

void DrawPointOn	(	int	x,
		int	y
	)

Draw a braille dot.

Parameters

x	the x coordinate of the dot.
y	the y coordinate of the dot.

Definition at line 134 of file canvas.cpp.

DrawPointOff()

void DrawPointOff	(	int	x,
		int	y
	)

Erase a braille dot.

Parameters

x	the x coordinate of the dot.
y	the y coordinate of the dot.

Definition at line 151 of file canvas.cpp.

DrawPointToggle()

void DrawPointToggle	(	int	x,
		int	y
	)

Toggle a braille dot. A filled one will be erased, and the other will be drawn.

Parameters

x	the x coordinate of the dot.
y	the y coordinate of the dot.

Definition at line 169 of file canvas.cpp.

DrawPoint() [1/3]

void DrawPoint	(	int	x,
		int	y,
		bool	value
	)

Draw a braille dot.

Parameters

x	the x coordinate of the dot.
y	the y coordinate of the dot.
value	whether the dot is filled or not.

Definition at line 104 of file canvas.cpp.

DrawPoint() [2/3]

void DrawPoint	(	int	x,
		int	y,
		bool	value,
		const Stylizer &	style
	)

Draw a braille dot.

Parameters

x	the x coordinate of the dot.
y	the y coordinate of the dot.
value	whether the dot is filled or not.
style	the style of the cell.

Definition at line 122 of file canvas.cpp.

DrawPoint() [3/3]

void DrawPoint	(	int	x,
		int	y,
		bool	value,
		const Color &	color
	)

Draw a braille dot.

Parameters

x	the x coordinate of the dot.
y	the y coordinate of the dot.
value	whether the dot is filled or not.
color	the color of the dot.

Definition at line 113 of file canvas.cpp.

DrawPointLine() [1/3]

void DrawPointLine	(	int	x1,
		int	y1,
		int	x2,
		int	y2
	)

Draw a line made of braille dots.

Parameters

x1	the x coordinate of the first dot.
y1	the y coordinate of the first dot.
x2	the x coordinate of the second dot.
y2	the y coordinate of the second dot.

Definition at line 188 of file canvas.cpp.

DrawPointLine() [2/3]

void DrawPointLine	(	int	x1,
		int	y1,
		int	x2,
		int	y2,
		const Stylizer &	style
	)

Draw a line made of braille dots.

Parameters

x1	the x coordinate of the first dot.
y1	the y coordinate of the first dot.o
x2	the x coordinate of the second dot.
y2	the y coordinate of the second dot.
style	the style of the line.

Definition at line 209 of file canvas.cpp.

DrawPointLine() [3/3]

void DrawPointLine	(	int	x1,
		int	y1,
		int	x2,
		int	y2,
		const Color &	color
	)

Draw a line made of braille dots.

Parameters

x1	the x coordinate of the first dot.
y1	the y coordinate of the first dot.
x2	the x coordinate of the second dot.
y2	the y coordinate of the second dot.
color	the color of the line.

Definition at line 198 of file canvas.cpp.

DrawPointCircle() [1/3]

void DrawPointCircle	(	int	x,
		int	y,
		int	radius
	)

Draw a circle made of braille dots.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.

Definition at line 246 of file canvas.cpp.

DrawPointCircle() [2/3]

void DrawPointCircle	(	int	x,
		int	y,
		int	radius,
		const Stylizer &	style
	)

Draw a circle made of braille dots.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
style	the style of the circle.

Definition at line 265 of file canvas.cpp.

DrawPointCircle() [3/3]

void DrawPointCircle	(	int	x,
		int	y,
		int	radius,
		const Color &	color
	)

Draw a circle made of braille dots.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
color	the color of the circle.

Definition at line 255 of file canvas.cpp.

DrawPointCircleFilled() [1/3]

void DrawPointCircleFilled	(	int	x,
		int	y,
		int	radius
	)

Draw a filled circle made of braille dots.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.

Definition at line 273 of file canvas.cpp.

DrawPointCircleFilled() [2/3]

void DrawPointCircleFilled	(	int	x,
		int	y,
		int	radius,
		const Stylizer &	style
	)

Draw a filled circle made of braille dots.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
style	the style of the circle.

Definition at line 295 of file canvas.cpp.

DrawPointCircleFilled() [3/3]

void DrawPointCircleFilled	(	int	x,
		int	y,
		int	radius,
		const Color &	color
	)

Draw a filled circle made of braille dots.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
color	the color of the circle.

Definition at line 282 of file canvas.cpp.

DrawPointEllipse() [1/3]

void DrawPointEllipse	(	int	x,
		int	y,
		int	r1,
		int	r2
	)

Draw an ellipse made of braille dots.

Parameters

x	the x coordinate of the center of the ellipse.
y	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.

Definition at line 307 of file canvas.cpp.

DrawPointEllipse() [2/3]

void DrawPointEllipse	(	int	x,
		int	y,
		int	r1,
		int	r2,
		const Color &	color
	)

Draw an ellipse made of braille dots.

Parameters

x	the x coordinate of the center of the ellipse.
y	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
color	the color of the ellipse.

Definition at line 317 of file canvas.cpp.

DrawPointEllipse() [3/3]

void DrawPointEllipse	(	int	x1,
		int	y1,
		int	r1,
		int	r2,
		const Stylizer &	s
	)

Draw an ellipse made of braille dots.

Parameters

x1	the x coordinate of the center of the ellipse.
y1	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
s	the style of the ellipse.

Definition at line 332 of file canvas.cpp.

DrawPointEllipseFilled() [1/3]

void DrawPointEllipseFilled	(	int	x1,
		int	y1,
		int	r1,
		int	r2
	)

Draw a filled ellipse made of braille dots.

Parameters

x1	the x coordinate of the center of the ellipse.
y1	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.

Definition at line 371 of file canvas.cpp.

DrawPointEllipseFilled() [2/3]

void DrawPointEllipseFilled	(	int	x1,
		int	y1,
		int	r1,
		int	r2,
		const Color &	color
	)

Draw a filled ellipse made of braille dots.

Parameters

x1	the x coordinate of the center of the ellipse.
y1	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
color	the color of the ellipse.

Definition at line 381 of file canvas.cpp.

DrawPointEllipseFilled() [3/3]

void DrawPointEllipseFilled	(	int	x1,
		int	y1,
		int	r1,
		int	r2,
		const Stylizer &	s
	)

Draw a filled ellipse made of braille dots.

Parameters

x1	the x coordinate of the center of the ellipse.
y1	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
s	the style of the ellipse.

Definition at line 396 of file canvas.cpp.

DrawBlockOn()

void DrawBlockOn	(	int	x,
		int	y
	)

Draw a block.

Parameters

x	the x coordinate of the block.
y	the y coordinate of the block.

Definition at line 465 of file canvas.cpp.

DrawBlockOff()

void DrawBlockOff	(	int	x,
		int	y
	)

Erase a block.

Parameters

x	the x coordinate of the block.
y	the y coordinate of the block.

Definition at line 485 of file canvas.cpp.

DrawBlockToggle()

void DrawBlockToggle	(	int	x,
		int	y
	)

Toggle a block. If it is filled, it will be erased. If it is empty, it will be filled.

Parameters

x	the x coordinate of the block.
y	the y coordinate of the block.

Definition at line 506 of file canvas.cpp.

DrawBlock() [1/3]

void DrawBlock	(	int	x,
		int	y,
		bool	value
	)

Draw a block.

Parameters

x	the x coordinate of the block.
y	the y coordinate of the block.
value	whether the block is filled or not.

Definition at line 435 of file canvas.cpp.

DrawBlock() [2/3]

void DrawBlock	(	int	x,
		int	y,
		bool	value,
		const Stylizer &	style
	)

Draw a block.

Parameters

x	the x coordinate of the block.
y	the y coordinate of the block.
value	whether the block is filled or not.
style	the style of the block.

Definition at line 453 of file canvas.cpp.

DrawBlock() [3/3]

void DrawBlock	(	int	x,
		int	y,
		bool	value,
		const Color &	color
	)

Draw a block.

Parameters

x	the x coordinate of the block.
y	the y coordinate of the block.
value	whether the block is filled or not.
color	the color of the block.

Definition at line 444 of file canvas.cpp.

DrawBlockLine() [1/3]

void DrawBlockLine	(	int	x1,
		int	y1,
		int	x2,
		int	y2
	)

Draw a line made of block characters.

Parameters

x1	the x coordinate of the first point of the line.
y1	the y coordinate of the first point of the line.
x2	the x coordinate of the second point of the line.
y2	the y coordinate of the second point of the line.

Definition at line 528 of file canvas.cpp.

DrawBlockLine() [2/3]

void DrawBlockLine	(	int	x1,
		int	y1,
		int	x2,
		int	y2,
		const Stylizer &	style
	)

Draw a line made of block characters.

Parameters

x1	the x coordinate of the first point of the line.
y1	the y coordinate of the first point of the line.
x2	the x coordinate of the second point of the line.
y2	the y coordinate of the second point of the line.
style	the style of the line.

Definition at line 549 of file canvas.cpp.

DrawBlockLine() [3/3]

void DrawBlockLine	(	int	x1,
		int	y1,
		int	x2,
		int	y2,
		const Color &	color
	)

Draw a line made of block characters.

Parameters

x1	the x coordinate of the first point of the line.
y1	the y coordinate of the first point of the line.
x2	the x coordinate of the second point of the line.
y2	the y coordinate of the second point of the line.
color	the color of the line.

Definition at line 538 of file canvas.cpp.

DrawBlockCircle() [1/3]

void DrawBlockCircle	(	int	x,
		int	y,
		int	radius
	)

Draw a circle made of block characters.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.

Definition at line 589 of file canvas.cpp.

DrawBlockCircle() [2/3]

void DrawBlockCircle	(	int	x,
		int	y,
		int	radius,
		const Stylizer &	style
	)

Draw a circle made of block characters.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
style	the style of the circle.

Definition at line 608 of file canvas.cpp.

DrawBlockCircle() [3/3]

void DrawBlockCircle	(	int	x,
		int	y,
		int	radius,
		const Color &	color
	)

Draw a circle made of block characters.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
color	the color of the circle.

Definition at line 598 of file canvas.cpp.

DrawBlockCircleFilled() [1/3]

void DrawBlockCircleFilled	(	int	x,
		int	y,
		int	radius
	)

Draw a filled circle made of block characters.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.

Definition at line 616 of file canvas.cpp.

DrawBlockCircleFilled() [2/3]

void DrawBlockCircleFilled	(	int	x,
		int	y,
		int	radius,
		const Stylizer &	s
	)

Draw a filled circle made of block characters.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
s	the style of the circle.

Definition at line 638 of file canvas.cpp.

DrawBlockCircleFilled() [3/3]

void DrawBlockCircleFilled	(	int	x,
		int	y,
		int	radius,
		const Color &	color
	)

Draw a filled circle made of block characters.

Parameters

x	the x coordinate of the center of the circle.
y	the y coordinate of the center of the circle.
radius	the radius of the circle.
color	the color of the circle.

Definition at line 625 of file canvas.cpp.

DrawBlockEllipse() [1/3]

void DrawBlockEllipse	(	int	x,
		int	y,
		int	r1,
		int	r2
	)

Draw an ellipse made of block characters.

Parameters

x	the x coordinate of the center of the ellipse.
y	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.

Definition at line 650 of file canvas.cpp.

DrawBlockEllipse() [2/3]

void DrawBlockEllipse	(	int	x1,
		int	y1,
		int	r1,
		int	r2,
		const Stylizer &	s
	)

Draw an ellipse made of block characters.

Parameters

x1	the x coordinate of the center of the ellipse.
y1	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
s	the style of the ellipse.

Definition at line 675 of file canvas.cpp.

DrawBlockEllipse() [3/3]

void DrawBlockEllipse	(	int	x,
		int	y,
		int	r1,
		int	r2,
		const Color &	color
	)

Draw an ellipse made of block characters.

Parameters

x	the x coordinate of the center of the ellipse.
y	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
color	the color of the ellipse.

Definition at line 660 of file canvas.cpp.

DrawBlockEllipseFilled() [1/3]

void DrawBlockEllipseFilled	(	int	x,
		int	y,
		int	r1,
		int	r2
	)

Draw a filled ellipse made of block characters.

Parameters

x	the x coordinate of the center of the ellipse.
y	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.

Definition at line 716 of file canvas.cpp.

DrawBlockEllipseFilled() [2/3]

void DrawBlockEllipseFilled	(	int	x1,
		int	y1,
		int	r1,
		int	r2,
		const Stylizer &	s
	)

Draw a filled ellipse made of block characters.

Parameters

x1	the x coordinate of the center of the ellipse.
y1	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
s	the style of the ellipse.

Definition at line 741 of file canvas.cpp.

DrawBlockEllipseFilled() [3/3]

void DrawBlockEllipseFilled	(	int	x,
		int	y,
		int	r1,
		int	r2,
		const Color &	color
	)

Draw a filled ellipse made of block characters.

Parameters

x	the x coordinate of the center of the ellipse.
y	the y coordinate of the center of the ellipse.
r1	the radius of the ellipse along the x axis.
r2	the radius of the ellipse along the y axis.
color	the color of the ellipse.

Definition at line 726 of file canvas.cpp.

DrawText() [1/3]

void DrawText	(	int	x,
		int	y,
		const std::string &	value
	)

Draw a piece of text.

Parameters

x	the x coordinate of the text.
y	the y coordinate of the text.
value	the text to draw.

Definition at line 782 of file canvas.cpp.

DrawText() [2/3]

void DrawText	(	int	x,
		int	y,
		const std::string &	value,
		const Color &	color
	)

Draw a piece of text.

Parameters

x	the x coordinate of the text.
y	the y coordinate of the text.
value	the text to draw.
color	the color of the text.

Definition at line 791 of file canvas.cpp.

DrawText() [3/3]

void DrawText	(	int	x,
		int	y,
		const std::string &	value,
		const Stylizer &	style
	)

Draw a piece of text.

Parameters

x	the x coordinate of the text.
y	the y coordinate of the text.
value	the text to draw.
style	the style of the text.

Definition at line 803 of file canvas.cpp.

Style()

void Style	(	int	x,
		int	y,
		const Stylizer &	style
	)

Modify a pixel at a given location.

Parameters

style

a function that modifies the pixel.

Definition at line 822 of file canvas.cpp.

---

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

• include/ftxui/dom/canvas.hpp
• src/ftxui/dom/canvas.cpp