19928/jj_vitp/Interface/widgets/other_widgets/arrow.e

note
	description: "[
		An arrow widget
		]"
	author: "Jimmy J. Johnson"

class
	ARROW

inherit

	VITP_WIDGET
		redefine
			default_create,
			target_imp,
			build_widgets,
			paint
		end

create
	default_create

feature {NONE} -- Initialization

	default_create
			-- Initialize attributes
		do
--			create head_dot
			create nock
			create shaft
			create head
			Precursor {VITP_WIDGET}
		end

	build_widgets
			-- Create the widgets that make up Current
		local
			t: EV_MODEL_TRANSFORMATION
		do
				-- Use the `dot' as reference point to build the arrow (the center of the nock).
				-- The EV_MODEL_DOT and EV_MODEL_LINE do not scale nicely, so use circle and
				-- rectangle to build the parts of the arrow.
			create t.make_zero
			t.translate (width // 2, 0)
			dot.transform (t)
			direction := North
			build_nock
			build_shaft
			build_head
		end

	build_nock
			-- Create the end of the arrow opposite the head
			-- A circle slightly bigger than the shaft, centered on `dot'
		local
			p1, p2: EV_COORDINATE
			r: INTEGER
		do
			r := (width // 2) + (width // 4)
			create p1.make_precise (dot.x - r, dot.y - r)
			create p2.make_precise (dot.x + r, dot.y + r)
			create nock.make_with_points (p1, p2)
			extend (nock)
		end

	build_shaft
			-- Create the shaft as a rectangle `width' wide	with an arrow on the
			-- end.  Assume the arrow tip ends `Default_length' away from `dot'.
		local
			p: EV_COORDINATE
			len, wid: INTEGER
		do
io.put_string ("ARROW.build_shaft -- fix me!  Add a pointed tip. %N")
			len := length
			wid := width // 2
			create shaft
			create p.make_precise (dot.x - wid, dot.y)
			shaft.extend_point (p)
			create p.make_precise (dot.x + wid, dot.y)
			shaft.extend_point (p)
			create p.make_precise (dot.x + wid, dot.y + len)
			shaft.extend_point (p)
			create p.make_precise (dot.x - wid, dot.y + len)
			shaft.extend_point (p)
			extend (shaft)
		end

	build_head
			-- Create the point (or retical) end of the arrow
		local
			p: EV_COORDINATE
		do
			create head
		end

feature -- Access

	direction: INTEGER
			-- The direction the arrow is pointing if not targetting a unit

	width: INTEGER
			-- The size of the `shaft'
		do
			Result := 100
		end

	length: INTEGER
			-- The length of the `shaft' calculated from the distance between the
			-- two widgets or as a percentage of the size of the `unit_widget'
		local
			xd, yd: INTEGER
		do
			Result := 500
		end

feature -- Basic operations

	fill_widgets
			-- Nothing to do here.
		do
		end

	paint
			-- Set the colors of the sub-widgets
		do
			Precursor {VITP_WIDGET}
--			if attached unit_widget as uw then
--				if attached targetted_widget as tw then
--					if uw.unit.nationality = US then
--						nock.set_foreground_color (adjusted_color (US_retical_color))
--						nock.set_background_color (adjusted_color (US_retical_color))
--						shaft.set_foreground_color (adjusted_color (US_retical_color))
--						shaft.set_background_color (adjusted_color (US_retical_color))
--					else
--						nock.set_foreground_color (adjusted_color (Japanese_retical_color))
--						nock.set_background_color (adjusted_color (Japanese_retical_color))
--						shaft.set_foreground_color (adjusted_color (Japanese_retical_color))
--						shaft.set_background_color (adjusted_color (Japanese_retical_color))
--					end
--				else
--						-- there is no target
--					nock.set_foreground_color (adjusted_color (arrow_color))
--					nock.set_background_color (adjusted_color (arrow_color))
--					shaft.set_foreground_color (adjusted_color (arrow_color))
--					shaft.set_background_color (adjusted_color (arrow_color))
--io.put_string ("ARROW.paint -- fix me!  Hide/show the retical %N")
--				end
--			end
		end

feature {NONE} -- Implementation

	target_imp: detachable ATTACK_UNIT
			-- Anchor for `target'

	nock: EV_MODEL_ELLIPSE
			-- Shows the end opposite the head

	shaft: EV_MODEL_POLYGON
			-- The shaft of the arrow

	head: EV_MODEL_POLYGON
			-- The point of the arrow

--	head: RETICAL
			-- Gun sight retical

	North: INTEGER = 1
	South: INTEGER = 2
	East: INTEGER = 3
	West: INTEGER = 4
	North_east: INTEGER = 5
	South_east: INTEGER = 6
	North_west: INTEGER = 7
	South_west: INTEGER = 8

end