    indexing
    	description: "Eiffel Vision menu item list. Mswindows implementation."
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date$"
    	revision: "$Revision$"

    deferred class interface
    	EV_MENU_ITEM_LIST_IMP

    feature -- Access

    	cursor: EV_DYNAMIC_LIST_CURSOR [EV_MENU_ITEM]
    			-- Current cursor position.
    			-- (from EV_DYNAMIC_LIST_I)
    		ensure -- from EV_DYNAMIC_LIST_I
    			not_void: Result /= Void

    	generating_type: STRING_8
    			-- Name of current object's generating type
    			-- (type of which it is a direct instance)
    			-- (from ANY)

    	generator: STRING_8
    			-- Name of current object's generating class
    			-- (base class of the type of which it is a direct instance)
    			-- (from ANY)

    	i_th (i: INTEGER_32): like item
    			-- Item at `i'-th position.
    			-- (from EV_DYNAMIC_LIST_IMP)
    		require -- from EV_DYNAMIC_LIST_I
    			i_within_bounds: i > 0 and then i <= count
    		ensure -- from EV_DYNAMIC_LIST_I
    			not_void: Result /= Void

    	index: INTEGER_32
    			-- Index of current position
    			-- (from EV_DYNAMIC_LIST_I)

    	index_of (v: like item; i: INTEGER_32): INTEGER_32
    			-- Index of i_th item `v', if present.
    			-- As dynamic list descendants are all sets,
    			-- Result will be zero for all values of `i'
    			-- that are not equal to one
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			positive_occurances: i > 0

    	item: EV_MENU_ITEM
    			-- Current item
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			readable: index > 0 and then index <= count
    		ensure -- from EV_DYNAMIC_LIST_I
    			not_void: Result /= Void

    	wel_item: POINTER
    			-- Generic Windows handle or structure pointer.
    			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
    			-- (from WEL_ANY)

    	item_by_data (data: ANY): like item
    			-- First item with `data'.
    			-- (from EV_ITEM_LIST_I)
    		require -- from EV_ITEM_LIST_I
    			data_not_void: data /= Void

    	off: BOOLEAN
    			-- Is there no current item?
    			-- (from EV_DYNAMIC_LIST_I)

    	popup_menu (position: INTEGER_32): WEL_MENU
    			-- Popup menu at the zero-based relative `position'
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count
    			popup_exists: popup_exists (position)
    		ensure -- from WEL_MENU
    			result_not_void: Result /= Void

    	retrieve_item_by_data (data: ANY; should_compare_objects: BOOLEAN): EV_MENU_ITEM
    			-- `Result' is first item in `Current' with data
    			-- matching `some_data'. Compare objects if
    			-- `should_compare_objects' otherwise compare references.
    			-- (from EV_DYNAMIC_LIST_I)

    	retrieve_items_by_data (data: ANY; should_compare_objects: BOOLEAN): ARRAYED_LIST [EV_MENU_ITEM]
    			-- `Result' is all items in `Current' with data
    			-- matching `some_data'. Compare objects if
    			-- `should_compare_objects' otherwise compare references.
    			-- (from EV_DYNAMIC_LIST_I)

    feature -- Measurement

    	count: INTEGER_32
    			-- Number of items.
    			-- (from EV_DYNAMIC_LIST_IMP)
    		require -- from  EV_DYNAMIC_LIST_I
    			True

    	wel_count: INTEGER_32
    			-- Number of items
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    		ensure -- from WEL_MENU
    			positive_result: Result >= 0

    feature -- Comparison

    	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void
    			-- or attached to isomorphic object structures?
    			-- (from ANY)
    		ensure -- from ANY
    			shallow_implies_deep: standard_equal (some, other) implies Result
    			both_or_none_void: (some = Void) implies (Result = (other = Void))
    			same_type: (Result and (some /= Void)) implies some.same_type (other)
    			symmetric: Result implies deep_equal (other, some)

    	frozen equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached
    			-- to objects considered equal?
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

    	is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object considered
    			-- equal to current object?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			symmetric: Result implies other.is_equal (Current)
    			consistent: standard_is_equal (other) implies Result

    	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached to
    			-- field-by-field identical objects of the same type?
    			-- Always uses default object comparison criterion.
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

    	frozen standard_is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object of the same type
    			-- as current object, and field-by-field identical to it?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			same_type: Result implies same_type (other)
    			symmetric: Result implies other.standard_is_equal (Current)

    feature -- Status report

    	conforms_to (other: ANY): BOOLEAN
    			-- Does type of current object conform to type
    			-- of `other' (as per Eiffel: The Language, chapter 13)?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void

    	exists: BOOLEAN
    			-- Does the item exist?
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			Result = (wel_item /= default_pointer)

    	has (v: like item): BOOLEAN
    			-- Does structure contain `v'?
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			v_not_void: v /= Void

    	id_string (an_id: INTEGER_32): STRING_32
    			-- String associated with `an_id'
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			result_not_void: Result /= Void

    	item_checked (an_id: INTEGER_32): BOOLEAN
    			-- Is the item idenfied by `an_id' checked?
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)

    	item_enabled (an_id: INTEGER_32): BOOLEAN
    			-- Is the item idenfied by `an_id' enabled?
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)

    	item_exists (an_id: INTEGER_32): BOOLEAN
    			-- Does `an_id' exist in the menu?
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0

    	popup_exists (position: INTEGER_32): BOOLEAN
    			-- Does a popup menu exists at the zero-based position?
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_position: position >= 0

    	position_enabled (position: INTEGER_32): BOOLEAN
    			-- Is the item at zero-based `position' enabled?
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count

    	same_type (other: ANY): BOOLEAN
    			-- Is type of current object identical to type of `other'?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			definition: Result = (conforms_to (other) and other.conforms_to (Current))

    	shared: BOOLEAN
    			-- Is item shared by another object?
    			-- If False (by default), item will
    			-- be destroyed by destroy_item.
    			-- If True, item will not be destroyed.
    			-- (from WEL_ANY)

    	valid_cursor (p: CURSOR): BOOLEAN
    			-- Can the cursor be moved to position `p'?
    			-- This is True if `p' conforms to EV_DYNAMIC_LIST_CURSOR and
    			-- if it points to an item, `Current' must have it.
    			-- (from EV_DYNAMIC_LIST_I)

    feature -- Status setting

    	check_item (an_id: INTEGER_32)
    			-- Put a check mark for the item identified by `an_id'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			item_checked: item_checked (an_id)

    	disable_item (an_id: INTEGER_32)
    			-- Disable the item identified by `an_id'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			item_disabled: not item_enabled (an_id)

    	disable_position (position: INTEGER_32)
    			-- Disable the item at zero-based `position'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count
    		ensure -- from WEL_MENU
    			position_disabled: not position_enabled (position)

    	enable_item (an_id: INTEGER_32)
    			-- Enable the item idenfied by `an_id'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			item_enabled: item_enabled (an_id)

    	enable_position (position: INTEGER_32)
    			-- Enable the item at zero-based `position'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count
    		ensure -- from WEL_MENU
    			position_enabled: position_enabled (position)

    	set_shared
    			-- Set shared to True.
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			shared: shared

    	set_unshared
    			-- Set shared to False.
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			unshared: not shared

    	uncheck_item (an_id: INTEGER_32)
    			-- Remove the check mark for the item identified
    			-- by `an_id'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			item_unchecked: not item_checked (an_id)

    feature -- Cursor movement

    	back
    			-- Move to previous item.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			not_before: index > 0

    	forth
    			-- Move cursor to next position.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			not_after: index <= count

    	go_i_th (i: INTEGER_32)
    			-- Move cursor to `i'-th position.
    			-- (from EV_DYNAMIC_LIST_I)

    	go_to (p: CURSOR)
    			-- Move cursor to position `p'.
    			-- (from EV_DYNAMIC_LIST_I)

    	move (i: INTEGER_32)
    			-- Move cursor `i' positions.
    			-- (from EV_DYNAMIC_LIST_I)

    	start
    			-- Move cursor to first position.
    			-- (from EV_DYNAMIC_LIST_I)
    		ensure -- from EV_DYNAMIC_LIST_I
    			index_on_first: index = 1

    feature -- Element change

    	append (s: SEQUENCE [EV_MENU_ITEM])
    			-- Append a copy of `s'. Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			sequence_not_void: s /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			count_increased: old count + s.count = count

    	append_bitmap (bitmap: WEL_BITMAP; an_id: INTEGER_32)
    			-- Append `bitmap' with the identifier `an_id' to the
    			-- menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			bitmap_not_void: bitmap /= Void
    			bitmap_exists: bitmap.exists
    			positive_id: an_id > 0
    			item_not_exists: not item_exists (an_id)
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1
    			item_exists: item_exists (an_id)

    	append_popup (a_menu: WEL_MENU; a_title: STRING_GENERAL)
    			-- Append a popup menu `a_menu' with `a_title' to the
    			-- current menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_menu_not_void: a_menu /= Void
    			a_menu_exists: a_menu.exists
    			a_title_not_void: a_title /= Void
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1

    	append_separator
    			-- Append a separator to the current menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1

    	append_string (a_string: STRING_GENERAL; an_id: INTEGER_32)
    			-- Append `a_string' with the identifier `an_id' to the
    			-- menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_string_not_void: a_string /= Void
    			positive_id: an_id > 0
    			item_not_exists: not item_exists (an_id)
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1
    			item_exists: item_exists (an_id)
    			string_set: id_string (an_id).is_equal (a_string)

    	append_string_with_break (a_string: STRING_GENERAL; an_id: INTEGER_32; has_separator: BOOLEAN)
    			-- Append an item with a break to the menu.
    			-- All the following items will be set in a new column.
    			-- If `has_separator' is True, then a vertical separator
    			-- appears between the two columns.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_string_not_void: a_string /= Void
    			positive_id: an_id > 0
    			item_not_exists: not item_exists (an_id)
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1
    			item_exists: item_exists (an_id)
    			string_set: id_string (an_id).is_equal (a_string)

    	extend (v: like item)
    			-- Add `v' to end. Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			v_not_void: v /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			has_v: has (v)

    	insert_bitmap (bitmap: WEL_BITMAP; a_position, an_id: INTEGER_32)
    			-- Insert `bitmap' at zero-based `a_position' with
    			-- `an_id'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_position_large_enough: a_position >= 0
    			a_position_small_enough: a_position <= wel_count
    			bitmap_not_void: bitmap /= Void
    			bitmap_exists: bitmap.exists
    			positive_id: an_id > 0
    			item_not_exists: not item_exists (an_id)
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1

    	insert_popup (a_menu: WEL_MENU; a_position: INTEGER_32; a_title: STRING_GENERAL)
    			-- Insert a popup menu `a_menu' at zero-based `a_position'
    			-- with `a_title'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_menu_not_void: a_menu /= Void
    			a_menu_exists: a_menu.exists
    			a_title_not_void: a_title /= Void
    			a_position_large_enough: a_position >= 0
    			a_position_small_enough: a_position <= wel_count
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1
    			popup_menu_set: popup_menu (a_position).item = a_menu.item

    	insert_separator (a_position: INTEGER_32)
    			-- Insert a separator at zero-based `a_position'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_position_large_enough: a_position >= 0
    			a_position_small_enough: a_position <= wel_count
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1

    	insert_string (a_string: STRING_GENERAL; a_position, an_id: INTEGER_32)
    			-- Insert `a_string' at zero-based `a_position' with
    			-- `an_id'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_position_large_enough: a_position >= 0
    			a_position_small_enough: a_position <= wel_count
    			a_string_not_void: a_string /= Void
    			positive_id: an_id > 0
    			item_not_exists: not item_exists (an_id)
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count + 1
    			string_set: id_string (an_id).is_equal (a_string)

    	merge_left (other: like interface)
    			-- Merge `other' into current structure before cursor
    			-- position. Do not move cursor. Empty `other'.
    			-- (from EV_DYNAMIC_LIST_I)

    	merge_right (other: like interface)
    			-- Merge `other' into current structure after cursor
    			-- position. Do not move cursor. Empty `other'.
    			-- (from EV_DYNAMIC_LIST_I)

    	modify_string (a_string: STRING_GENERAL; an_id: INTEGER_32)
    			-- Modify the menu title identified by `an_id' to
    			-- `a_string'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			a_string_not_void: a_string /= Void
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			string_set: id_string (an_id).is_equal (a_string)

    	put_front (v: like item)
    			-- Add `v' at beginning. Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			v_not_void: v /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			has_v: has (v)

    	put_i_th (v: like item; i: INTEGER_32)
    			-- Replace item at `i'-th position by `v'.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			valid_index: i > 0 and i <= count
    			v_not_void: v /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			has_v: has (v)

    	put_left (v: like item)
    			-- Add `v' to the left of cursor position. Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			v_not_void: v /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			has_v: has (v)

    	put_right (v: like item)
    			-- Add `v' to the right of cursor position. Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			v_not_void: v /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			has_v: has (v)

    	replace (v: like item)
    			-- Replace current item by `v'.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			writable: index > 0 and then index <= count
    			v_not_void: v /= Void
    		ensure -- from EV_DYNAMIC_LIST_I
    			has_v: has (v)

    	set_item (an_item: POINTER)
    			-- Set item with `an_item'
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			item_set: wel_item = an_item

    feature -- Removal

    	delete_item (an_id: INTEGER_32)
    			-- Delete `an_id' from the menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count - 1
    			item_not_exists: not item_exists (an_id)

    	delete_position (position: INTEGER_32)
    			-- Delete the item at zero-based `position'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count - 1

    	dispose
    			-- Destroy the inner structure of `Current'.
    			--
    			-- This function should be called by the GC when the
    			-- object is collected or by the user if `Current' is
    			-- no more usefull.
    			-- (from WEL_ANY)

    	prune (v: like item)
    			-- Remove `v' if present. Do not move cursor, except if
    			-- cursor was on `v', move to right neighbor.
    			-- (from EV_DYNAMIC_LIST_I)
    		ensure -- from EV_DYNAMIC_LIST_I
    			cursor_not_moved: not old has (v) implies old interface.index = interface.index
    			cursor_not_moved: old has (v) and then old interface.index < old index_of (v, 1) implies index = old index
    			cursor_not_moved: old has (v) and then old interface.index >= old index_of (v, 1) implies index = old index - 1
    			not_has_v: not has (v)

    	remove
    			-- Remove current item. Move cursor to right neighbor
    			-- (or `after' if no right neighbor).
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			writable: not off
    		ensure -- from EV_DYNAMIC_LIST_I
    			not_has_v: not has (old item)

    	remove_left
    			-- Remove item to the left of cursor position.
    			-- Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			left_exists: index > 1
    			not_before: not (index = 0)
    		ensure then -- from EV_DYNAMIC_LIST_I
    			left_neighbor_removed: not has (old i_th (index - 1))

    	remove_position (position: INTEGER_32)
    			-- Remove the item at zero-based `position'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count
    		ensure -- from WEL_MENU
    			new_count: wel_count = old wel_count - 1

    	remove_right
    			-- Remove item to the right of cursor position.
    			-- Do not move cursor.
    			-- (from EV_DYNAMIC_LIST_I)
    		require -- from EV_DYNAMIC_LIST_I
    			right_exists: index < count
    		ensure then -- from EV_DYNAMIC_LIST_I
    			right_neighbor_removed: not has (old i_th (index + 1))

    	wipe_out
    			-- Remove all items.
    			-- (from EV_DYNAMIC_LIST_I)

    feature -- Conversion

    	position_to_item_id (position: INTEGER_32): INTEGER_32
    			-- Retrieve the menu item identifier of a menu item at
    			-- the zero-based `position'.
    			-- Return 0 if the item at the zero-based
    			-- `position' is a separator or a pop-up menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			position_large_enough: position >= 0
    			position_small_enough: position < wel_count

    feature -- Duplication

    	copy (other: like Current)
    			-- Update current object using fields of object attached
    			-- to `other', so as to yield equal objects.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_equal: is_equal (other)

    	frozen deep_copy (other: like Current)
    			-- Effect equivalent to that of:
    			--		copy (`other' . deep_twin)
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, other)

    	frozen deep_twin: like Current
    			-- New object structure recursively duplicated from Current.
    			-- (from ANY)
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, Result)

    	frozen standard_copy (other: like Current)
    			-- Copy every field of `other' onto corresponding field
    			-- of current object.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_standard_equal: standard_is_equal (other)

    	frozen standard_twin: like Current
    			-- New object field-by-field identical to `other'.
    			-- Always uses default copying semantics.
    			-- (from ANY)
    		ensure -- from ANY
    			standard_twin_not_void: Result /= Void
    			equal: standard_equal (Result, Current)

    	frozen twin: like Current
    			-- New object equal to `Current'
    			-- twin calls copy; to change copying/twining semantics, redefine copy.
    			-- (from ANY)
    		ensure -- from ANY
    			twin_not_void: Result /= Void
    			is_equal: Result.is_equal (Current)

    feature -- Basic operations

    	frozen default: like Current
    			-- Default value of object's type
    			-- (from ANY)

    	frozen default_pointer: POINTER
    			-- Default value of type `POINTER'
    			-- (Avoid the need to write `p'.default for
    			-- some `p' of type `POINTER'.)
    			-- (from ANY)

    	default_rescue
    			-- Process exception for routines with no Rescue clause.
    			-- (Default: do nothing.)
    			-- (from ANY)

    	frozen do_nothing
    			-- Execute a null action.
    			-- (from ANY)

    	hilite_menu_item (window: WEL_COMPOSITE_WINDOW; an_id: INTEGER_32)
    			-- Hilite the item identified by `an_id' in the
    			-- `window''s menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			window_not_void: window /= Void
    			window_exists: window.exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)

    	show_track (x, y: INTEGER_32; window: WEL_COMPOSITE_WINDOW)
    			-- Show a track popup menu at the `x' and `y' absolute
    			-- position. `window' will receive the selection in
    			-- `on_menu_command'.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			not_empty: wel_count > 0
    			window_not_void: window /= Void
    			window_exists: window.exists

    	show_track_with_option (x, y: INTEGER_32; window: WEL_COMPOSITE_WINDOW; option: INTEGER_32; rect: WEL_RECT)
    			-- Show a track popup menu with `option' at
    			-- the `x' and `y' absolute position.
    			-- `window' will receive the selection in
    			-- `on_menu_command'.
    			-- `rect' specifies the portion of the screen
    			-- in which the user can select without
    			-- dismissing the popup menu. If this parameter
    			-- is Void the popup menu is dismissed if the
    			-- user clicks outside the popup menu
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			not_empty: wel_count > 0
    			window_not_void: window /= Void
    			window_exists: window.exists

    	unhilite_menu_item (window: WEL_COMPOSITE_WINDOW; an_id: INTEGER_32)
    			-- unhilite the item identified by `an_id' in the
    			-- `window''s menu.
    			-- (from WEL_MENU)
    		require -- from WEL_MENU
    			exists: exists
    			window_not_void: window /= Void
    			window_exists: window.exists
    			positive_id: an_id > 0
    			item_exists: item_exists (an_id)

    feature -- Event handling

    	create_item_select_actions: EV_MENU_ITEM_SELECT_ACTION_SEQUENCE
    			-- Create a item_select action sequence.
    			-- (from EV_MENU_ITEM_LIST_ACTION_SEQUENCES_IMP)
    		require -- from  EV_MENU_ITEM_LIST_ACTION_SEQUENCES_I
    			True

    	item_select_actions: EV_MENU_ITEM_SELECT_ACTION_SEQUENCE
    			-- Actions to be performed when a menu item is selected.
    			-- (from EV_MENU_ITEM_LIST_ACTION_SEQUENCES_I)
    		ensure -- from EV_MENU_ITEM_LIST_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	new_item_actions: ACTION_SEQUENCE [TUPLE [EV_ITEM]]
    			-- Actions to be performed after an item is added.
    			-- (from EV_ITEM_LIST_IMP)

    	remove_item_actions: ACTION_SEQUENCE [TUPLE [EV_ITEM]]
    			-- Actions to be performed before an item is removed.
    			-- (from EV_ITEM_LIST_IMP)

    feature -- Output

    	io: STD_FILES
    			-- Handle to standard file setup
    			-- (from ANY)

    	out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of tagged_out.
    			-- (from ANY)

    	print (some: ANY)
    			-- Write terse external representation of `some'
    			-- on standard output.
    			-- (from ANY)

    	frozen tagged_out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of out.
    			-- (from ANY)

    feature -- Platform

    	operating_environment: OPERATING_ENVIRONMENT
    			-- Objects available from the operating system
    			-- (from ANY)

    feature -- Standard output

    	print_radio_group (g: like radio_group)

    	print_radio_groups

    invariant
    		-- from EV_DYNAMIC_LIST_I
    	index_within_bounds: is_usable implies (index >= 0 and then index <= count + 1)

    		-- from EV_ANY_I
    	interface_coupled: is_usable implies interface /= Void and then interface.implementation = Current
    	base_make_called: base_make_called

    		-- from ANY
    	reflexive_equality: standard_is_equal (Current)
    	reflexive_conformance: conforms_to (Current)

    		-- from EV_ITEM_LIST_IMP
    	new_item_actions_not_void: is_usable implies new_item_actions /= Void
    	remove_item_actions_not_void: is_usable implies remove_item_actions /= Void

    indexing
    	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
    	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
    	source: "[
    		Eiffel Software
    		356 Storke Road, Goleta, CA 93117 USA
    		Telephone 805-685-1006, Fax 805-685-6869
    		Website http://www.eiffel.com
    		Customer support http://support.eiffel.com
    	]"

    end -- class EV_MENU_ITEM_LIST_IMP