scrollarea.cpp File Reference

#include "scrollarea.h"
#include <stdarg.h>
#include "gridfont.h"

Classes
struct	SpriteType

Functions
void	set_drawing_window (WINDOW *w)
	set the drawing window More...
void	set_area_size (int sx, int sy)
	create a scrollable canvas area More...
bool	has_area ()
	is a scrollable canvas area available? More...
int	get_area_width ()
	get the width of the scrollable area More...
int	get_area_height ()
	get the height of the scrollable area More...
void	set_window_size (int sx, int sy)
	set the size of the displayed window More...
bool	has_window ()
	is a displayed window available? More...
int	get_window_width ()
	get the width of the displayed window More...
int	get_window_height ()
	get the height of the displayed window More...
void	set_window_offset (int ox, int oy)
	set the offset of the displayed window More...
void	clear_area (int ch)
	clear the scrollable area More...
void	set_area_border (int ch)
	set the border of the scrollable area More...
void	set_window_border (int ch)
	set the border of the displayed window More...
int	get_cell (int x, int y)
	get the cell character at position (x, y) of the canvas area More...
int	get_ascii (int x, int y)
	get the ascii character at cell position (x, y) More...
void	set_cell (int x, int y, int ch)
	set the cell at position (x, y) to character ch of the canvas area More...
void	use_cell_color (int index)
	use indexed color pair for foreground/background colors of cells More...
void	set_cell_offset (int x, int y)
	set the cell coordinate offset More...
void	set_cell_mode (bool retain)
	set the cell modification mode More...
int *	get_cell_area (int x, int y, int sx, int sy, int ch)
	get the cell area at top-left position (x, y) with size (sx, sy) More...
void	fill_cell_area (int x, int y, int sx, int sy, int ch)
	fill a cell area at top-left position (x, y) with size (sx, sy) More...
void	render_cell_area (int x, int y, int sx, int sy, const int *data)
	render a cell area at top-left position (x, y) with size (sx, sy) More...
int	render_text_area (int x, int y, const char *text)
	render a text area at top-left position (x, y) More...
int	render_text_format (int x, int y, const char *format,...)
	render a formatted text at position (x, y) More...
void	render_grid_char (int x, int y, int ch)
	render a grid font character at top-left position (x, y) More...
void	render_grid_text (int x, int y, const char *text)
	render a text string with grid font characters at top-left position (x, y) More...
void	render_line (int x1, int y1, int x2, int y2, int ch)
	render a line from position (x1, y1) to (x2, y2) More...
void	render_frame (int x1, int y1, int x2, int y2, int ch)
	render a frame from position (x1, y1) to (x2, y2) More...
void	render_circle (int xc, int yc, int r, int ch, double aspect)
	render a circle at center position (xc, yc) with radius r More...
void	render_points (int xc, int yc, int x, int y, int ax, int ay, double aspect, int ch)
void	render_ellipse (int xc, int yc, int ax, int ay, int ch, double aspect)
void	flood_fill (int x, int y, int ch)
	flood-fill a cell area starting at position (x, y) More...
void	inverse_flood_fill (int x, int y, int ch)
	flood-fill everything but a cell area starting at position (x, y) More...
void	scroll_area_up ()
	scroll the content of the canvas area up More...
void	scroll_area_down (int num)
	scroll the content of the canvas area down More...
void	scroll_area_left (int num)
	scroll the content of the canvas area left More...
void	scroll_area_right (int num)
	scroll the content of the canvas area right More...
int	get_sprite_num ()
void	enable_sprite (int num, int sx, int sy, bool window, bool own)
	enable a sprite overlay More...
bool	is_sprite_enabled (int num)
	is a sprite overlay enabled? More...
int	get_sprite_width (int num)
	get the width of a sprite More...
int	get_sprite_height (int num)
	get the height of a sprite More...
void	clear_sprite (int num, int ch)
	clear a sprite More...
void	set_sprite_data (int num, int sx, int sy, int *data)
	set the sprite data More...
int *	get_sprite_data (int num)
	get the sprite data More...
void	set_sprite_text (int num, const char *text, int ch, bool interprete)
	set the sprite data by text string More...
void	fill_sprite_area (int num, int x, int y, int sx, int sy, int ch)
	fill a sprite cell area More...
void	set_sprite_area (int num, int x, int y, int sx, int sy, const int *data)
	set a sprite cell area More...
int	print_sprite_text (int num, int x, int y, const char *text)
	print a sprite text area More...
void	print_sprite_grid_char (int num, int x, int y, int ch)
	print a sprite grid font character More...
void	print_sprite_grid_text (int num, int x, int y, const char *text)
	print a sprite text string with grid font characters More...
void	mirror_sprite_horizontal (int num, bool flip)
	mirror the sprite horizontally More...
void	mirror_sprite_vertical (int num, bool flip)
	mirror the sprite vertically More...
void	scroll_sprite_up (int num)
	scroll the sprite up More...
void	scroll_sprite_down (int num)
	scroll the sprite down More...
void	scroll_sprite_left (int num)
	scroll the sprite left More...
void	scroll_sprite_right (int num)
	scroll the sprite right More...
void	set_sprite_position (int num, int x, int y)
	set the sprite position More...
void	center_sprite_position (int num, int x, int y)
	center the sprite position More...
void	get_sprite_position (int num, int *x, int *y)
	get the sprite position More...
void	hide_sprite (int num)
	hide a sprite More...
void	show_sprite (int num)
	show a sprite More...
void	background_sprite (int num, bool background)
	make background sprite More...
void	parallax_sprite (int num, float dx, float dy)
	make parallax sprite More...
bool	detect_area_collision (int num, int ch, const char *empty)
	detect a sprite collision with a non-empty canvas area More...
bool	detect_area_touch (int num, int dx, int dy, int ch, const char *empty)
	detect a sprite touch with a non-empty canvas area More...
bool	detect_sprite_collision (int num, int spr)
	detect a sprite collision with a non-transparent area of another sprite More...
bool	detect_sprite_touch (int num, int dx, int dy, int spr)
	detect a sprite touch with a non-transparent area of another sprite More...
void	bake_sprite (int num)
	bake the sprite into the canvas area More...
void	disable_sprite (int num)
	disable a sprite More...
void	disable_sprites ()
	disable all sprites More...
void	redraw_window (int x, int y)
	redraw the displayed window at top-left position (x, y) More...
void	position_window (int x, int y)
	position the displayed window at center position (x, y) More...
void	scroll_window (int x, int y, int deltax, int deltay, bool stop)
	scroll the displayed window to top-left position (x, y) More...
void	center_window (int x, int y, int deltax, int deltay, bool stop)
	scroll the displayed window to center position (x, y) More...
void	get_window (int *x, int *y)
	get the top-left position (x, y) of the scrolled window More...
void	release_area ()
	release allocated memory More...

Variables
static int	sizex = 0
static int	sizey = 0
static int	winx = 0
static int	winy = 0
static int	offx = 0
static int	offy = 0
static int	scrollx = 0
static int	scrolly = 0
static WINDOW *	W = NULL
static int *	area = NULL
static int *	window = NULL
static bool	window_change = false
static int	window_border_ch = -1
static int	color_idx = 0
static int	coordx = 0
static int	coordy = 0
static int	mode = 0
static const int	sprites = 64
static SpriteType	sprite [sprites] = {{0}}
static int	sprite_begin = 0
static int	sprite_end = -1

Function Documentation

background_sprite()

void background_sprite	(	int	num,
		bool	background = true
	)

make background sprite

• "num" is the number of the sprite
• a background sprite only shows where the canvas area is empty
• an empty area is filled with spaces

bake_sprite()

void bake_sprite

(

int

num

)

bake the sprite into the canvas area

• "num" is the number of the sprite

center_sprite_position()

void center_sprite_position	(	int	num,
		int	x,
		int	y
	)

center the sprite position

• "num" is the number of the sprite
• "x" and "y" is the center position of the sprite

center_window()

void center_window	(	int	x,
		int	y,
		int	deltax = 0,
		int	deltay = 0,
		bool	stop = true
	)

scroll the displayed window to center position (x, y)

• "deltax" and "deltay" is the position delta that triggers scrolling
• "stop" determines if scrolling should stop at the edges of the scrollable area

clear_area()

void clear_area

(

int

ch = ' '

)

clear the scrollable area

• "ch" is the character used to clear the area

clear_sprite()

void clear_sprite	(	int	num,
		int	ch = -1
	)

clear a sprite

• "num" is the number of the sprite
• "ch" is the character to be set
• by default the sprite is made fully transparent

detect_area_collision()

bool detect_area_collision	(	int	num,
		int	ch = -1,
		const char *	empty = NULL
	)

detect a sprite collision with a non-empty canvas area

• "num" is the number of the sprite
• "ch" is the character that represents empty areas
• "empty" contains characters that also represent empty areas
• empty areas are represented by space by default

detect_area_touch()

bool detect_area_touch	(	int	num,
		int	dx,
		int	dy,
		int	ch = -1,
		const char *	empty = NULL
	)

detect a sprite touch with a non-empty canvas area

• "num" is the number of the sprite
• (dx, dy) is the direction vector of the touch detection
• "ch" is the character that represents empty areas
• "empty" contains characters that also represent empty areas
• non-empty areas are represented by anything but space by default

detect_sprite_collision()

bool detect_sprite_collision	(	int	num,
		int	spr
	)

detect a sprite collision with a non-transparent area of another sprite

• "num" is the number of the sprite
• "spr" is the number of the other sprite
• non-transparent areas are represented by positive cell values

detect_sprite_touch()

bool detect_sprite_touch	(	int	num,
		int	dx,
		int	dy,
		int	spr
	)

detect a sprite touch with a non-transparent area of another sprite

• "num" is the number of the sprite
• "spr" is the number of the other sprite
• non-transparent areas are represented by positive cell values

disable_sprite()

void disable_sprite

(

int

num

)

disable a sprite

• "num" is the number of the sprite

disable_sprites()

void disable_sprites

(

)

disable all sprites

enable_sprite()

void enable_sprite	(	int	num,
		int	sx,
		int	sy,
		bool	window = false,
		bool	own = false
	)

enable a sprite overlay

• "num" is the number of the sprite
• "sx" and "sy" is the cell area size of the sprite
• "window" determines if the sprite position is area or window relative
• "own" determines that the data is provided by set_sprite_data and is owned by the user
• by default the sprite is fully transparent

fill_cell_area()

void fill_cell_area	(	int	x,
		int	y,
		int	sx,
		int	sy,
		int	ch = -1
	)

fill a cell area at top-left position (x, y) with size (sx, sy)

• "ch" is the character used to fill the area
  • by default ACS_CKBOARD is used as character

fill_sprite_area()

void fill_sprite_area	(	int	num,
		int	x,
		int	y,
		int	sx,
		int	sy,
		int	ch = -1
	)

fill a sprite cell area

• "num" is the number of the sprite
• "x" and "y" is the top-left position (x, y) of the sub-area to be cleared
• "sx" and "sy" is the size of the sub-area to be cleared
• "ch" is the character to be copied into the sub-area
  • by default ACS_CKBOARD is used as character

flood_fill()

void flood_fill	(	int	x,
		int	y,
		int	ch = -1
	)

flood-fill a cell area starting at position (x, y)

• "ch" is the character used to fill the area
  • by default ACS_CKBOARD is used as character

get_area_height()

int get_area_height

(

)

get the height of the scrollable area

get_area_width()

int get_area_width

(

)

get the width of the scrollable area

get_ascii()

int get_ascii	(	int	x,
		int	y
	)

get the ascii character at cell position (x, y)

• ncurses attributes like color indices are excluded

get_cell()

int get_cell	(	int	x,
		int	y
	)

get the cell character at position (x, y) of the canvas area

get_cell_area()

int* get_cell_area	(	int	x,
		int	y,
		int	sx,
		int	sy,
		int	ch = -1
	)

get the cell area at top-left position (x, y) with size (sx, sy)

• "ch" is the character that represents transparent areas
• returns a newly allocated array of respective size

get_sprite_data()

int* get_sprite_data

(

int

num

)

get the sprite data

• transparent areas are represented by negative cell values

get_sprite_height()

int get_sprite_height

(

int

num

)

get the height of a sprite

• "num" is the number of the sprite

get_sprite_num()

int get_sprite_num

(

)

get_sprite_position()

void get_sprite_position	(	int	num,
		int *	x,
		int *	y
	)

get the sprite position

• "num" is the number of the sprite
• "x" and "y" will be the top-left position (x, y) of the sprite

get_sprite_width()

int get_sprite_width

(

int

num

)

get the width of a sprite

• "num" is the number of the sprite

get_window()

void get_window	(	int *	x,
		int *	y
	)

get the top-left position (x, y) of the scrolled window

get_window_height()

int get_window_height

(

)

get the height of the displayed window

get_window_width()

int get_window_width

(

)

get the width of the displayed window

has_area()

bool has_area

(

)

is a scrollable canvas area available?

has_window()

bool has_window

(

)

is a displayed window available?

hide_sprite()

void hide_sprite

(

int

num

)

hide a sprite

• "num" is the number of the sprite

inverse_flood_fill()

void inverse_flood_fill	(	int	x,
		int	y,
		int	ch = -1
	)

flood-fill everything but a cell area starting at position (x, y)

• "ch" is the character used to fill the area
  • by default ACS_CKBOARD is used as character

is_sprite_enabled()

bool is_sprite_enabled

(

int

num

)

is a sprite overlay enabled?

• "num" is the number of the sprite

mirror_sprite_horizontal()

void mirror_sprite_horizontal	(	int	num,
		bool	flip = true
	)

mirror the sprite horizontally

• "num" is the number of the sprite
• "flip" determines whether a slash is replaced with a backslash or vice versa

mirror_sprite_vertical()

void mirror_sprite_vertical	(	int	num,
		bool	flip = true
	)

mirror the sprite vertically

• "num" is the number of the sprite
• "flip" determines whether
  • a slash is replaced with a backslash or vice versa
  • an underscore is replaced with an overscore or vice versa

parallax_sprite()

void parallax_sprite	(	int	num,
		float	dx,
		float	dy
	)

make parallax sprite

• "num" is the number of the sprite
• a parallax sprite scrolls relative to the viewing coordinates
• "dx" and "dy" define the amount of parallax scrolling

position_window()

void position_window	(	int	x,
		int	y
	)

position the displayed window at center position (x, y)

• it is assumed that the displayed window area has been cleared once
• subsequent calls will only update modifications to the canvas area

print_sprite_grid_char()

void print_sprite_grid_char	(	int	num,
		int	x,
		int	y,
		int	ch
	)

print a sprite grid font character

• "num" is the number of the sprite
• "x" and "y" is the top-left position (x, y) of the character to be printed
• "ch" is the character to be printed

print_sprite_grid_text()

void print_sprite_grid_text	(	int	num,
		int	x,
		int	y,
		const char *	text
	)

print a sprite text string with grid font characters

• "num" is the number of the sprite
• "x" and "y" is the top-left position (x, y) of the text to be printed
• "text" is the string to be printed
• the grid area is made up from consecutive text lines separated by \n

print_sprite_text()

int print_sprite_text	(	int	num,
		int	x,
		int	y,
		const char *	text
	)

print a sprite text area

• "num" is the number of the sprite
• "x" and "y" is the top-left position (x, y) of the text to be printed
• "text" is the string to be printed
• the text area is made up from consecutive text lines separated by \n
• return value is the number of printed text lines

redraw_window()

void redraw_window	(	int	x,
		int	y
	)

redraw the displayed window at top-left position (x, y)

• it is assumed that the displayed window area has been cleared once
• subsequent calls will only update modifications to the canvas area

release_area()

void release_area

(

)

release allocated memory

render_cell_area()

void render_cell_area	(	int	x,
		int	y,
		int	sx,
		int	sy,
		const int *	data
	)

render a cell area at top-left position (x, y) with size (sx, sy)

• the data is made up from consecutive lines of characters

render_circle()

void render_circle	(	int	xc,
		int	yc,
		int	r,
		int	ch = -1,
		double	aspect = 2
	)

render a circle at center position (xc, yc) with radius r

• "ch" is the character used to render the circle
  • by default graphical characters are used

render_ellipse()

void render_ellipse	(	int	xc,
		int	yc,
		int	ax,
		int	ay,
		int	ch = -1,
		double	aspect = 2
	)

• "ch" is the character used to render the ellipse
  • by default graphical characters are used

render_frame()

void render_frame	(	int	x1,
		int	y1,
		int	x2,
		int	y2,
		int	ch = -1
	)

render a frame from position (x1, y1) to (x2, y2)

• "ch" is the character used to render the frame
  • by default graphical characters are used

render_grid_char()

void render_grid_char	(	int	x,
		int	y,
		int	ch
	)

render a grid font character at top-left position (x, y)

render_grid_text()

void render_grid_text	(	int	x,
		int	y,
		const char *	text
	)

render a text string with grid font characters at top-left position (x, y)

• the grid area is made up from consecutive text lines separated by \n

render_line()

void render_line	(	int	x1,
		int	y1,
		int	x2,
		int	y2,
		int	ch = -1
	)

render a line from position (x1, y1) to (x2, y2)

• "ch" is the character used to render the line
  • by default graphical characters are used

render_points()

void render_points	(	int	xc,
		int	yc,
		int	x,
		int	y,
		int	ax,
		int	ay,
		double	aspect,
		int	ch
	)

render_text_area()

int render_text_area	(	int	x,
		int	y,
		const char *	text
	)

render a text area at top-left position (x, y)

• the text area is made up from consecutive text lines separated by \n
• return value is the number of rendered text lines

render_text_format()

int render_text_format	(	int	x,
		int	y,
		const char *	format,
			...
	)

render a formatted text at position (x, y)

• the text area is made up from consecutive text lines separated by \n
• the text may contain conversion symbols starting with ''
• return value is the number of rendered text lines

scroll_area_down()

void scroll_area_down

(

int

num

)

scroll the content of the canvas area down

scroll_area_left()

void scroll_area_left

(

int

num

)

scroll the content of the canvas area left

scroll_area_right()

void scroll_area_right

(

int

num

)

scroll the content of the canvas area right

scroll_area_up()

void scroll_area_up

(

)

scroll the content of the canvas area up

scroll_sprite_down()

void scroll_sprite_down

(

int

num

)

scroll the sprite down

• "num" is the number of the sprite

scroll_sprite_left()

void scroll_sprite_left

(

int

num

)

scroll the sprite left

• "num" is the number of the sprite

scroll_sprite_right()

void scroll_sprite_right

(

int

num

)

scroll the sprite right

• "num" is the number of the sprite

scroll_sprite_up()

void scroll_sprite_up

(

int

num

)

scroll the sprite up

• "num" is the number of the sprite

scroll_window()

void scroll_window	(	int	x,
		int	y,
		int	deltax = 0,
		int	deltay = 0,
		bool	stop = true
	)

scroll the displayed window to top-left position (x, y)

• "deltax" and "deltay" is the position delta that triggers scrolling
• "stop" determines if scrolling should stop at the edges of the scrollable area

set_area_border()

void set_area_border

(

int

ch = ACS_CKBOARD

)

set the border of the scrollable area

• "ch" is the character used for the area border

set_area_size()

void set_area_size	(	int	sx,
		int	sy
	)

create a scrollable canvas area

• with sx columns and sy rows
• the canvas area may contain a single ASCII character per cell
• by default the canvas area is empty (filled with spaces)
• after canvas area creation we need to
  • define the screen window size via set_window_size
  • define the contents of the canvas area via set_cell, flood_fill etc.
  • and finally render the canvas via redraw_window or center_window

set_cell()

void set_cell	(	int	x,
		int	y,
		int	ch
	)

set the cell at position (x, y) to character ch of the canvas area

set_cell_mode()

void set_cell_mode

(

bool

retain = false

)

set the cell modification mode

• in retain mode only spaces will be overwritten via set_cell

set_cell_offset()

void set_cell_offset	(	int	x = 0,
		int	y = 0
	)

set the cell coordinate offset

• the coordinate offset is applied both to get_cell and set_cell
• the offset is added implicitly to the supplied cell coordinates

set_drawing_window()

void set_drawing_window

(

WINDOW *

w

)

set the drawing window

• stdscr is used by default

set_sprite_area()

void set_sprite_area	(	int	num,
		int	x,
		int	y,
		int	sx,
		int	sy,
		const int *	data
	)

set a sprite cell area

• "num" is the number of the sprite
• "x" and "y" is the top-left position (x, y) of the sub-area to be set
• "sx" and "sy" is the size of the sub-area to be set
• "data" is the data to be copied into the sub-area
• negative data values are not copied having a transparency effect

set_sprite_data()

void set_sprite_data	(	int	num,
		int	sx,
		int	sy,
		int *	data
	)

set the sprite data

• transparent areas are represented by negative cell values

set_sprite_position()

void set_sprite_position	(	int	num,
		int	x,
		int	y
	)

set the sprite position

• "num" is the number of the sprite
• "x" and "y" is the top-left position (x, y) of the sprite

set_sprite_text()

void set_sprite_text	(	int	num,
		const char *	text,
		int	ch = -1,
		bool	interprete = false
	)

set the sprite data by text string

• "ch" is the character that represents transparent areas
• when "interprete" is enabled treat special characters as follows:
  • ^ as overscore
  • # as checker board
  • B as bold attribute
  • digits as color attributes
  • 0 to clear attributes

set_window_border()

void set_window_border

(

int

ch = ACS_CKBOARD

)

set the border of the displayed window

• "ch" is the character used for the window border

set_window_offset()

void set_window_offset	(	int	ox,
		int	oy
	)

set the offset of the displayed window

set_window_size()

void set_window_size	(	int	sx,
		int	sy
	)

set the size of the displayed window

show_sprite()

void show_sprite

(

int

num

)

show a sprite

• "num" is the number of the sprite

use_cell_color()

void use_cell_color

(

int

index = 1

)

use indexed color pair for foreground/background colors of cells

• colors need to be initialized beforehand via init_color()
• 1 = white/black
• 2 = red/black
• 3 = green/black
• 4 = blue/black
• 5 = yellow/black
• 6 = cyan/black
• 7 = magenta/black
• 8 = black/white
• 9 = black/black
• 0 = disabled

Variable Documentation

area

int* area = NULL

static

color_idx

int color_idx = 0

static

coordx

int coordx = 0

static

coordy

int coordy = 0

static

mode

int mode = 0

static

offx

int offx = 0

static

offy

int offy = 0

static

scrollx

int scrollx = 0

static

scrolly

int scrolly = 0

static

sizex

int sizex = 0

static

sizey

int sizey = 0

static

sprite

SpriteType sprite[sprites] = {{0}}

static

sprite_begin

int sprite_begin = 0

static

sprite_end

int sprite_end = -1

static

sprites

const int sprites = 64

static

W

WINDOW* W = NULL

static

window

int* window = NULL

static

window_border_ch

int window_border_ch = -1

static

window_change

bool window_change = false

static

winx

int winx = 0

static

winy

int winy = 0

static