deferred class
	EV_DRAWABLE

General
	cluster: vision2.interface.properties
	description: 
		"Abstraction for objects onto which graphical primitives may be
		applied."
	keywords: "figure, primitive, drawing, line, point, ellipse"

Ancestors
	EV_ANY
	EV_COLORIZABLE
	EV_DRAWABLE_CONSTANTS
	EV_FONTABLE

Queries
	background_color: EV_COLOR
	clip_area: EV_RECTANGLE
	dashed_line_style: BOOLEAN
	data: ANY
	drawing_mode: INTEGER
	font: EV_FONT
	foreground_color: EV_COLOR
	height: INTEGER
	is_destroyed: BOOLEAN
	line_width: INTEGER
	tile: EV_PIXMAP
	valid_drawing_mode (a_mode: INTEGER): BOOLEAN
	width: INTEGER

Commands
	clear
	clear_rectangle (x, y, a_width, a_height: INTEGER)
	copy (other: [like Current] EV_DRAWABLE)
	destroy
	disable_dashed_line_style
	draw_arc (x, y, a_bounding_width, a_bounding_height: INTEGER; a_start_angle, an_aperture: REAL)
	draw_ellipse (x, y, a_bounding_width, a_bounding_height: INTEGER)
	draw_pie_slice (x, y, a_bounding_width, a_bounding_height: INTEGER; a_start_angle, an_aperture: REAL)
	draw_pixmap (x, y: INTEGER; a_pixmap: EV_PIXMAP)
	draw_point (x, y: INTEGER)
	draw_polyline (points: ARRAY [EV_COORDINATE]; is_closed: BOOLEAN)
	draw_rectangle (x, y, a_width, a_height: INTEGER)
	draw_segment (x1, y1, x2, y2: INTEGER)
	draw_straight_line (x1, y1, x2, y2: INTEGER)
	draw_sub_pixmap (x, y: INTEGER; a_pixmap: EV_PIXMAP; area: EV_RECTANGLE)
	draw_text (x, y: INTEGER; a_text: STRING)
	draw_text_top_left (x, y: INTEGER; a_text: STRING)
	enable_dashed_line_style
	fill_ellipse (x, y, a_bounding_width, a_bounding_height: INTEGER)
	fill_pie_slice (x, y, a_bounding_width, a_bounding_height: INTEGER; a_start_angle, an_aperture: REAL)
	fill_polygon (points: ARRAY [EV_COORDINATE])
	fill_rectangle (x, y, a_width, a_height: INTEGER)
	remove_clip_area
	remove_tile
	set_and_mode
	set_background_color (a_color: [like background_color] EV_COLOR)
	set_clip_area (an_area: EV_RECTANGLE)
	set_copy_mode
	set_data (some_data: [like data] ANY)
	set_default_colors
	set_drawing_mode (a_mode: INTEGER)
	set_font (a_font: EV_FONT)
	set_foreground_color (a_color: [like foreground_color] EV_COLOR)
	set_invert_mode
	set_line_width (a_width: INTEGER)
	set_or_mode
	set_tile (a_pixmap: EV_PIXMAP)
	set_xor_mode

Constraints
	line width positive or zero
	drawing mode valid