indexing

	description: "[

		Represents a panel for the current status of all hats

	]"
	date: "$Date$"
	revision: "$Revision$"

class JOYSTICK_HAT_PANEL

inherit

	EM_CONSTANTS

	EM_PANEL
		redefine
			draw_body
		end

create

	make

feature {NONE} -- Initialization

	make (panel_width, panel_height: INTEGER) is
			-- Initialise with a drawing panel of size `panel_width' `panel_height'.
		do
			Bitmap_factory.create_empty_bitmap (panel_width, panel_height)
			check
				image_crated: Bitmap_factory.last_bitmap /= Void
			end

			image := bitmap_factory.last_bitmap
			image.fill (background_color)

			make_from_dimension (panel_width, panel_height)

			create drawing_color.make_with_rgb (255,0,0)
			create black_color.make_black

			-- container for sotring the actual axis position
			create hat_values.make (0, 15) -- default values

			-- create cobobox and add it to the panel
			create combobox.make_empty
			combobox.set_position (5, 15)
			add_widget (combobox)

			-- add to the `current' and handle hat events
			joystick_focus.add_focus (current)
			joystick_hat_event.subscribe (agent handle_joystick_hat_event (?))
		ensure
			image_created: image /= Void
		end

feature -- Access

	image: EM_BITMAP
			-- Bitmap that holds drawing

	background_color: EM_COLOR is
			-- Background color of panel
		once
			create result.make_white
		end

	set_hats_count (a_count: INTEGER) is
			-- setup the number of axis for this event
		local
			i: INTEGER
		do
			-- create axis_values and wipe out the combobox
			create hat_values.make (0, a_count -1)
			combobox.wipe_out

			-- fill combobox with all avaiable axis
			from
				i := 0
			until
				i = a_count
			loop
				combobox.put ("Hat #" + i.out)
				i := i + 1
			end

			-- set dimension
			combobox.set_dimension (90, combobox.optimal_height)

			if combobox.count > 0 then
				combobox.set_selected_index (1)
				combobox.enable
			else
				-- select optimal height if empty
				combobox.put ("No Hats")
				combobox.set_height (combobox.optimal_height)
				combobox.set_selected_index (1)
				combobox.disable
			end
		end

feature -- Drawing

	draw_body is
			-- Draw the body of the widget.
		local
			pos_x, pos_y: INTEGER
		do
			-- first draw the background
			surface.blit_surface (image, 0, 0)

			-- draw only something else if needed
			if combobox.selected_index /= 0 then
				surface.set_drawing_color (black_color)
				surface.draw_rectangle (create {EM_ORTHOGONAL_RECTANGLE}.make_from_coordinates (15, 45, 85, 115))
				surface.set_drawing_color (drawing_color)

				if hat_values.count > 0 then
					inspect hat_values.item (combobox.selected_index - 1)
					when em_joystick_hat_leftup then
						pos_x := 15
						pos_y := 45
					when em_joystick_hat_up then
						pos_x := 50
						pos_y := 45
					when em_joystick_hat_rightup then
						pos_x := 85
						pos_y := 45
					when em_joystick_hat_left then
						pos_x := 15
						pos_y := 80
					when em_joystick_hat_centered then
						pos_x := 50
						pos_y := 80
					when em_joystick_hat_right then
						pos_x := 85
						pos_y := 80
					when em_joystick_hat_leftdown then
						pos_x := 15
						pos_y := 115
					when em_joystick_hat_down then
						pos_x := 50
						pos_y := 115
					when em_joystick_hat_rightdown then
						pos_x := 85
						pos_y := 115
					else
						-- should not happend
					end

					-- draw a scare where the hat is
					surface.draw_rectangle (create {EM_ORTHOGONAL_RECTANGLE}.make_from_coordinates (pos_x - 5, pos_y - 5, pos_x + 5, pos_y + 5))
				end
			end
		end

feature {JOYSTICK_SCENE} -- Joystick Management

	handle_joystick_hat_event (event: EM_JOYSTICK_HAT_EVENT) is
			-- Handle joystick hat event
		do
			hat_values.put (event.value, event.is_hat)
			set_changed
		end

feature {NONE} -- Implementation

	hat_values: ARRAY [INTEGER]
			-- container for all axis values

	combobox: EM_COMBOBOX [STRING]
			-- selector for hat 0..hat_values.count

	drawing_color: EM_COLOR
			-- color to draw

	black_color: EM_COLOR
			-- black color for drawing

end