Path Interface Reference

import"evg.idl";

Collaboration diagram for Path:

Public Member Functions
	Path ()
boolean	point_over (Point2D pt)
boolean	point_over (double x, double y)
Path	get_flatten ()
Path	flatten ()
Path	add_path (Path subpath, optional Matrix2D mx=null)
Path	arc (double radius, double start, double end, optional unsigned long close=0)
Path	arc_svg (double end_x, double end_y, double r_x, double r_y)
Path	arc_svg (double end_x, double end_y, double r_x, double r_y, optional double x_axis_rotation=0, optional boolean large_arc_flag=false, optional boolean sweep_flag=false)
Path	arc_bifs (double end_x, double end_y, double fa_x, double fa_y, double fb_x, double fb_y, optional boolean cw=false)
Path	n_bezier (Point2D pt1, Point2D pt2, Point2D pt3,...)
Path	ellipse (double cx, double cy, double a_axis, double b_axis)
Path	ellipse (Point2D center, double a_axis, double b_axis)
Path	rectangle (double ox, double oy, double width, double height, optional boolean centered=false)
Path	rectangle (Point2D o, double width, double height, optional boolean centered=false)
Path	quadratic_to (double c_x, double c_y, double x, double y)
*Path	cubic_to (double c1_x, double c1_y, double c2_x, double c2_y, double x, double y)
Path	line_to (double x, double y)
Path	move_to (double x, double y)
Path	close ()
Path	reset ()
Path	clone ()
*Path	outline (PenSettings ps)
Path	transform (Matrix2D mx)

Data Fields
readonly attribute boolean	empty
readonly attribute boolean	zero_fill
readonly attribute boolean	even_fill
readonly attribute Rect	bounds
readonly attribute Rect	ctrl_bounds
readonly attribute boolean	is_rectangle

Detailed Description

Path object to describe vector graphics. Most path functions return the path object itself, so that the operations can be chained:

path.move_to(0,0).line_to(0,100).line_to(10, 10).close();

Constructor & Destructor Documentation

Path()

Path::Path

(

)

Constructor

Member Function Documentation

point_over() [1/2]

boolean Path::point_over

(

Point2D

pt

)

checks if point is over a path - see gf_path_point_over

Parameters

pt	point to test

Returns

true if over

point_over() [2/2]

boolean Path::point_over	(	double	x,
		double	y
	)

checks if point is over a path - see gf_path_point_over

Parameters

x	x-coord of point to test
y	y-coord of point to test

Returns

true if over

get_flatten()

Path Path::get_flatten

(

)

gets a flatten version of the path - see gf_path_get_flatten

Returns

the created flatten path

flatten()

Path Path::flatten

(

)

flattens the path - see gf_path_flatten

Returns

the path

add_path()

Path Path::add_path	(	Path	subpath,
		optional Matrix2D	mx = null
	)

adds a path to the path - see gf_path_add_subpath

Parameters

subpath	path to add
mx	matrix to apply to path

Returns

the path

arc()

Path Path::arc	(	double	radius,
		double	start,
		double	end,
		optional unsigned long	close = 0
	)

adds an arc to the path - see gf_path_add_arc

Parameters

radius	radius of the arc
start	start angle of the arc in radians
end	end angle of the arc in radians
close	closing type: 0 for open arc, 1 for close arc, 2 for pie

Returns

the path

arc_svg() [1/2]

Path Path::arc_svg	(	double	end_x,
		double	end_y,
		double	r_x,
		double	r_y
	)

adds an SVG arc to the path - see gf_path_add_svg_arc_to

Parameters

end_x	x-coordinate of the arc end point
end_y	y-coordinate of the arc end point
r_x	x-axis radius
r_y	y-axis radius

Returns

the path

arc_svg() [2/2]

Path Path::arc_svg	(	double	end_x,
		double	end_y,
		double	r_x,
		double	r_y,
		optional double	x_axis_rotation = 0,
		optional boolean	large_arc_flag = false,
		optional boolean	sweep_flag = false
	)

adds an SVG arc to the path - see gf_path_add_svg_arc_to

Parameters

end_x	x-coordinate of the arc end point
end_y	y-coordinate of the arc end point
r_x	x-axis radius
r_y	y-axis radius
x_axis_rotation	angle for the x-axis
large_arc_flag	large or short arc selection
sweep_flag	if 1, the arc will be clockwise, otherwise counter-clockwise.

Returns

the path

arc_bifs()

Path Path::arc_bifs	(	double	end_x,
		double	end_y,
		double	fa_x,
		double	fa_y,
		double	fb_x,
		double	fb_y,
		optional boolean	cw = false
	)

adds an arc to the path - see gf_path_add_arc_to

Parameters

end_x	x-coordinate of the arc end point
end_y	y-coordinate of the arc end point
fa_x	x-coordinate of the arc first focal point
fa_y	y-coordinate of the arc first focal point
fb_x	x-coordinate of the arc second focal point
fb_y	y-coordinate of the arc second focal point
cw	if 1, the arc will be clockwise, otherwise counter-clockwise.

Returns

the path

n_bezier()

Path Path::n_bezier	(	Point2D	pt1,
		Point2D	pt2,
		Point2D	pt3,
			...
	)

adds N-1 bezier curve - see gf_path_add_bezier. The function can take any number of points

Parameters

pt1	first control point of the bezier curve
pt2	second control point of the bezier curve
pt3	last point of the curve if last point defined, otherwise next control point

Returns

the path

ellipse() [1/2]

Path Path::ellipse	(	double	cx,
		double	cy,
		double	a_axis,
		double	b_axis
	)

adds an ellipse - see gf_path_add_ellipse

Parameters

cx	x-coordinate of the ellipse center
cy	y-coordinate of the ellipse center
a_axis	length of the horizontal ellipse axis
b_axis	length of the vertical ellipse axis

Returns

the path

ellipse() [2/2]

Path Path::ellipse	(	Point2D	center,
		double	a_axis,
		double	b_axis
	)

adds an ellipse - see gf_path_add_ellipse

Parameters

center	ellipse center
a_axis	length of the horizontal ellipse axis
b_axis	length of the vertical ellipse axis

Returns

the path

rectangle() [1/2]

Path Path::rectangle	(	double	ox,
		double	oy,
		double	width,
		double	height,
		optional boolean	centered = false
	)

adds a rectangle - see gf_path_add_rect and gf_path_add_rect_center

Parameters

ox	x-coordinate of the rectangle center or top-left
oy	y-coordinate of the rectangle center or top-left
width	width of the rectangle
height	height of the rectangle
centered	indicates if the given coordinates are the top-left one (false) or the center ones (true)

Returns

the path

rectangle() [2/2]

Path Path::rectangle	(	Point2D	o,
		double	width,
		double	height,
		optional boolean	centered = false
	)

adds a rectangle - see gf_path_add_rect and gf_path_add_rect_center

Parameters

o	rectangle center or top-left
width	width of the rectangle
height	height of the rectangle
centered	indicates if the given coordinates are the top-left one (false) or the center ones (true)

Returns

the path

quadratic_to()

Path Path::quadratic_to	(	double	c_x,
		double	c_y,
		double	x,
		double	y
	)

adds a quadratic see gf_path_add_quadratic_to

Parameters

c_x	x-coordinate of the control point of the quadratic curve
c_y	y-coordinate of the control point of the quadratic curve
x	x-coordinate of the end point of the cubic quadratic
y	y-coordinate of the end point of the cubic quadratic

Returns

the path

cubic_to()

* Path Path::cubic_to	(	double	c1_x,
		double	c1_y,
		double	c2_x,
		double	c2_y,
		double	x,
		double	y
	)

adds a cubic bezier curve to the current contour, starting from the current path point - see gf_path_add_cubic_to

Parameters

c1_x	x-coordinate of the first control point of the cubic curve
c1_y	y-coordinate of the first control point of the cubic curve
c2_x	x-coordinate of the second control point of the cubic curve
c2_y	y-coordinate of the second control point of the cubic curve
x	x-coordinate of the end point of the cubic curve
y	y-coordinate of the end point of the cubic curve

Returns

the path

line_to()

Path Path::line_to	(	double	x,
		double	y
	)

adds a line - see gf_path_add_line_to

Parameters

x	x-coordinate of the point
y	y-coordinate of the point

Returns

the path

move_to()

Path Path::move_to	(	double	x,
		double	y
	)

adds a move to - see gf_path_add_move_to

Parameters

x	x-coordinate of the point
y	y-coordinate of the point

Returns

the path

close()

Path Path::close

(

)

close the path - see gf_path_close

Returns

the path

reset()

Path Path::reset

(

)

reset the path - see gf_path_reset

Returns

the path

clone()

Path Path::clone

(

)

clone the path - see gf_path_clone

Returns

the cloned path

outline()

* Path Path::outline

(

PenSettings

ps

)

generates a path outline - see gf_path_get_outline

Parameters

ps	the pen settings used to produce the outline

Returns

the outline path

transform()

Path Path::transform

(

Matrix2D

mx

)

transforms a path - see gf_path_add_subpath

Parameters

mx	matrix to apply to path

Returns

the new transformed path

Field Documentation

empty

readonly attribute boolean Path::empty

empty path flag - see gf_path_is_empty

zero_fill

readonly attribute boolean Path::zero_fill

if true, path will use zero_non_zero fill rule otherwise odd/even rule

even_fill

readonly attribute boolean Path::even_fill

if true, path will use odd/even rule but fill only even parts

bounds

readonly attribute Rect Path::bounds

bounds of path - see gf_path_get_bounds

ctrl_bounds

readonly attribute Rect Path::ctrl_bounds

control bounds of path - see gf_path_get_control_bounds

is_rectangle

readonly attribute boolean Path::is_rectangle

set to true if path is a rectangle/square