    indexing
    	description: "Eiffel Vision tree item. Mswindows implementation."
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date: 2006-03-22 23:29:03 -0800 (Wed, 22 Mar 2006) $"
    	revision: "$Revision: 57641 $"

    class interface
    	EV_TREE_ITEM_IMP

    create
    	make (an_interface: like interface)
    			-- Create `Current' with interface `an_interface'.
    			-- (from EV_TREE_NODE_IMP)
    		require -- from EV_ANY_I
    			an_interface_not_void: an_interface /= Void
    		ensure -- from EV_ANY_I
    			interface_assigned: interface = an_interface
    			base_make_called: base_make_called

    feature -- Initialization

    	tooltip: STRING_32
    			-- Text of tooltip assigned to `Current'.
    			-- (from EV_TOOLTIPABLE_IMP)
    		require -- from  EV_TOOLTIPABLE_I
    			True

    feature -- Access

    	accept_cursor: EV_POINTER_STYLE
    			-- Accept cursor set by user.
    			-- To be displayed when the screen pointer is over a target that accepts
    			-- pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	awaiting_movement: BOOLEAN
    			-- Are we currently awaiting the movement threshold to
    			-- be reached for as drag and drop or dockable move?
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	capture_enabled: BOOLEAN
    			-- Is the mouse currently captured?
    			-- See constants Capture_xxxx at the end of the class.
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	check_drag_and_drop_release (a_x, a_y: INTEGER_32)
    			-- End transport if in drag and drop.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	children_nb: INTEGER_32
    			-- Information about the children of the item
    			-- (from WEL_TREE_VIEW_ITEM)
    		require -- from WEL_TREE_VIEW_ITEM
    			valid_member: children_is_valid

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

    	deny_cursor: EV_POINTER_STYLE
    			-- Deny cursor set by user.
    			-- To be displayed when the screen pointer is not over a valid target.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	drag_and_drop_starting_movement: INTEGER_32 is 3
    			-- Pointer movement in pixels required to start a drag and drop.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	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)

    	h_item: POINTER
    			-- Item to which this structure refers.
    			-- (from WEL_TREE_VIEW_ITEM)

    	has_heavy_capture: BOOLEAN
    			-- Does parent have a heavy capture?
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	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_TREE_NODE
    			-- 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

    	lparam: INTEGER_32
    			-- Information about the lparam of the item
    			-- (from WEL_TREE_VIEW_ITEM)
    		require -- from WEL_TREE_VIEW_ITEM
    			valid_member: lparam_is_valid

    	mask: INTEGER_32
    			-- Array of flags that indicate which of the other
    			-- structure members contain valid data or which are
    			-- to be filled in. This member can be a combination
    			-- of the Tvif_* values.
    			-- See class WEL_TVIF_CONSTANTS.
    			-- (from WEL_TREE_VIEW_ITEM)

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

    	original_pressure: REAL_64
    			-- Hold the values passed to start transport so when a transport
    			-- actually starts, with real_start_transport,these can be passed
    			-- as arguments.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_x: INTEGER_32
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_x_tilt: REAL_64
    			-- Hold the values passed to start transport so when a transport
    			-- actually starts, with real_start_transport,these can be passed
    			-- as arguments.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_y: INTEGER_32
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	original_y_tilt: REAL_64
    			-- Hold the values passed to start transport so when a transport
    			-- actually starts, with real_start_transport,these can be passed
    			-- as arguments.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    	parent: EV_TREE_NODE_LIST
    			-- Parent of `Current'.
    			-- (from EV_TREE_NODE_I)
    		require -- from  EV_ITEM_I
    			True

    	parent_imp: EV_ITEM_LIST_IMP [EV_TREE_NODE, EV_TREE_NODE_IMP]
    			-- Parent implementation.
    			-- (from EV_TREE_NODE_IMP)

    	parent_tree: EV_TREE
    			-- Root tree that holds `Current'.
    			-- (from EV_TREE_NODE_I)

    	pebble: ANY
    			-- Data to be transported by pick and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_function: FUNCTION [ANY, TUPLE, ANY]
    			-- Returns data to be transported by pick and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_positioning_enabled: BOOLEAN
    			-- If `True' then pick and drop start coordinates are
    			-- pebble_x_position, pebble_y_position.
    			-- If `False' then pick and drop start coordinates are
    			-- the pointer coordinates.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_x_position: INTEGER_32
    			-- Initial x position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pebble_y_position: INTEGER_32
    			-- Initial y position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	pixmap: EV_PIXMAP
    			-- Pixmap of `Current'.
    			-- (from EV_TREE_NODE_IMP)
    		require -- from  EV_PIXMAPABLE_I
    			True

    	pixmap_imp: EV_PIXMAP_IMP_STATE
    			-- Implementation of pixmap in `Current'.
    			-- (from EV_PIXMAPABLE_IMP)

    	pnd_original_parent: EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP
    			-- Actual widget parent of `Current' when PND starts.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	pnd_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
    			-- Process a pointer press that may alter the current state
    			-- of pick/drag and drop.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	release_capture
    			-- Release user input.
    			-- Works only on current windows thread.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	release_heavy_capture
    			-- Release user input.
    			-- Works on all windows threads.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	retrieve_item_by_data (data: ANY; should_compare_objects: BOOLEAN): EV_TREE_NODE
    			-- `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_TREE_NODE]
    			-- `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)

    	set_capture
    			-- Grab user input.
    			-- Works only on current windows thread.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	set_heavy_capture
    			-- Grab user input.
    			-- Works on all windows threads.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	set_pointer_style (c: EV_POINTER_STYLE)
    			-- Assign `c' to parent_imp pointer style.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_I
    			True

    	state: INTEGER_32
    			-- Current state of the item.
    			-- (from WEL_TREE_VIEW_ITEM)
    		require -- from WEL_TREE_VIEW_ITEM
    			valid_member: state_is_valid

    	state_mask: INTEGER_32
    			-- State mask flag.
    			-- (from WEL_TREE_VIEW_ITEM)

    	text: STRING_32
    			-- Text displayed in `Current'.
    			-- (from EV_TEXTABLE_IMP)
    		require -- from  EV_TEXTABLE_I
    			True
    		ensure -- from EV_TEXTABLE_I
    			not_void: Result /= Void
    			cloned: Result /= text

    	top_level_window_imp: EV_WINDOW_IMP
    			-- Window containing `Current' in parenting heirarchy.
    			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

    	transport_executing: BOOLEAN
    			-- Is a pick and drop or drag and drop currently
    			-- being executed?
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	widget_imp_at_pointer_position: EV_WIDGET_IMP
    			-- `Result' is implementation of widget at current
    			-- pointer position or Void if none.
    			-- (from EV_SHARED_TRANSPORT_IMP)

    feature -- Measurement

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

    	structure_size: INTEGER_32
    			-- Size to allocate (in bytes)
    			-- (from WEL_TREE_VIEW_ITEM)
    		ensure -- from WEL_STRUCTURE
    			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))

    	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

    	children_is_valid: BOOLEAN
    			-- Is the structure member `children' valid?
    			-- (from WEL_TREE_VIEW_ITEM)

    	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)

    	find_item_recursively_by_data (data: ANY): EV_TREE_NODE
    			-- If `data' contained in a tree item at any level then
    			-- assign this item to `Result'.
    			-- (from EV_TREE_NODE_LIST_I)
    		ensure -- from EV_TREE_NODE_LIST_I
    			index_not_changed: old interface.index = interface.index

    	foreground_window: WEL_WINDOW
    			-- Foreground window (window with focus)
    			-- (from WEL_WINDOWS_ROUTINES)

    	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

    	has_recursively (an_item: like item): BOOLEAN
    			-- Does `Current' contain `an_item' at any level?
    			-- (from EV_TREE_NODE_LIST_I)
    		ensure -- from EV_TREE_NODE_LIST_I
    			index_not_changed: old interface.index = interface.index

    	is_expanded: BOOLEAN
    			-- is `Current' expanded ?
    			-- (from EV_TREE_NODE_IMP)
    		require -- from EV_TREE_NODE_I
    			in_tree: parent_tree /= Void

    	is_selectable: BOOLEAN
    			-- May the `Current' be selected?
    			-- (from EV_TREE_NODE_I)

    	is_selected: BOOLEAN
    			-- Is `Current' selected?
    			-- (from EV_TREE_NODE_IMP)
    		require -- from  EV_SELECTABLE_I
    			True

    	is_transport_enabled: BOOLEAN
    			-- Is the transport mechanism enabled?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	is_window (hwnd: POINTER): BOOLEAN
    			-- Does `hwnd' point to a valid Window?
    			-- (from WEL_WINDOWS_ROUTINES)

    	key_down (virtual_key: INTEGER_32): BOOLEAN
    			--Is 'virtual' key pressed
    			-- (from WEL_WINDOWS_ROUTINES)

    	key_locked (virtual_key: INTEGER_32): BOOLEAN
    			--Is 'virtual' key locked
    			-- (from WEL_WINDOWS_ROUTINES)

    	key_to_string (key_data: INTEGER_32): STRING_32
    			-- Give the string associated with the key given by
    			-- `virtual_key'.
    			-- (from WEL_WINDOWS_ROUTINES)

    	lparam_is_valid: BOOLEAN
    			-- Is the structure member lparam valid?
    			-- (from WEL_TREE_VIEW_ITEM)

    	mode_is_drag_and_drop: BOOLEAN
    			-- Is the transport mechanism drag and drop?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	mode_is_pick_and_drop: BOOLEAN
    			-- Is the transport mechanism pick and drop?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	mode_is_target_menu: BOOLEAN
    			-- Is the transport mechanism target menu?
    			-- (from EV_PICK_AND_DROPABLE_I)

    	recursive_do_all (action: PROCEDURE [ANY, TUPLE [EV_TREE_NODE]])
    			-- Apply `action' to every item.
    			-- Semantics not guaranteed if `action' changes the structure;
    			-- (from EV_TREE_NODE_LIST_I)

    	retrieve_item_recursively_by_data (data: ANY; should_compare_objects: BOOLEAN): EV_TREE_NODE
    			-- If `data' contained in a tree item at any level then
    			-- assign this item to `Result'. Compare objects if
    			-- `should_compare_objects' otherwise compare references.
    			-- (from EV_TREE_NODE_LIST_I)
    		ensure -- from EV_TREE_NODE_LIST_I
    			index_not_changed: old interface.index = interface.index

    	retrieve_items_recursively_by_data (data: ANY; should_compare_objects: BOOLEAN): ARRAYED_LIST [EV_TREE_NODE]
    			-- `Result' is all tree items contained in `Current' at any level,
    			-- with data matching `data'. Compare objects if
    			-- `should_compare_objects' otherwise compare references.
    			-- (from EV_TREE_NODE_LIST_I)
    		ensure -- from EV_TREE_NODE_LIST_I
    			result_not_void: Result /= Void

    	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)

    	state_is_valid: BOOLEAN
    			-- Is the structure member state valid?
    			-- (from WEL_TREE_VIEW_ITEM)

    	system_directory: STRING_32
    			-- Path of the Windows system directory
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			result_not_void: Result /= Void

    	text_is_valid: BOOLEAN
    			-- Is the structure member text valid?
    			-- (from WEL_TREE_VIEW_ITEM)

    	tick_count: INTEGER_32
    			-- Number of milliseconds that have
    			-- elapsed since Windows was started.
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			positive_result: Result >= 0

    	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)

    	window_of_item (hwnd: POINTER): WEL_WINDOW
    			-- Retrieve Eiffel object associated with `hwnd' pointer.
    			-- (from WEL_WINDOWS_ROUTINES)
    		require -- from WEL_WINDOWS_ROUTINES
    			hwnd_not_null: hwnd /= default_pointer
    			is_window_pointer: is_window (hwnd)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			is_wel_window: Result /= Void implies (create {INTERNAL}).type_conforms_to ((create {INTERNAL}).dynamic_type (Result), (create {INTERNAL}).dynamic_type_from_string ("WEL_WINDOW"))

    	windows_directory: STRING_32
    			-- Path of the Windows directory
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			result_not_void: Result /= Void

    feature -- Status setting

    	disable_pebble_positioning
    			-- Assign `False' to pebble_positioning_enabled.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	disable_select
    			-- Deselect `Current'.
    			-- (from EV_TREE_NODE_IMP)
    		require -- from EV_DESELECTABLE_I
    			is_selectable: is_selectable
    		ensure -- from EV_DESELECTABLE_I
    			deselected: not is_selected

    	disable_transport
    			-- Deactivate pick/drag and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_I
    			True
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			is_transport_disabled: not is_transport_enabled

    	enable_pebble_positioning
    			-- Assign `True' to pebble_positioning_enabled.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	enable_select
    			-- Select `Current'.
    			-- (from EV_TREE_NODE_IMP)
    		require -- from EV_SELECTABLE_I
    			is_selectable: is_selectable
    		ensure -- from EV_SELECTABLE_I
    			selected: is_selected

    	enable_transport
    			-- Activate pick/drag and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE_IMP)
    		require -- from EV_PICK_AND_DROPABLE_I
    			pebble_not_void: pebble /= Void or pebble_function /= Void
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			is_transport_enabled: interface.implementation.is_transport_enabled

    	escape_pnd
    			-- Escape the pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_IMP)
    		ensure -- from EV_PICK_AND_DROPABLE_IMP
    			not_in_transport: not transport_executing

    	pnd_motion (a_x, a_y, a_screen_x, a_screen_y: INTEGER_32)
    			-- If in drag/pick and drop then update.
    			-- (from EV_PICK_AND_DROPABLE_IMP)

    	remove_pebble
    			-- Remove pebble.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pebble_removed: pebble = Void and pebble_function = Void
    			is_transport_disabled: not is_transport_enabled

    	set_accept_cursor (a_cursor: like accept_cursor)
    			-- Set `a_cursor' to be displayed when the screen pointer is over a
    			-- target that accepts pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	set_deny_cursor (a_cursor: like deny_cursor)
    			-- Set `a_cursor' to be displayed when the screen pointer is over a
    			-- target that doesn't accept pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE_I)

    	set_drag_and_drop_mode
    			-- Set transport mechanism to drag and drop,
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			mode_is_drag_and_drop: mode_is_drag_and_drop

    	set_pebble (a_pebble: like pebble)
    			-- Assign `a_pebble' to pebble.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		require -- from EV_PICK_AND_DROPABLE_I
    			a_pebble_not_void: a_pebble /= Void
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pebble_assigned: interface.implementation.pebble = a_pebble
    			is_transport_enabled: interface.implementation.is_transport_enabled

    	set_pebble_function (a_function: FUNCTION [ANY, TUPLE, ANY])
    			-- Assign `a_function' to pebble_function.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		require -- from EV_PICK_AND_DROPABLE_I
    			a_function_not_void: a_function /= Void
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pebble_function_assigned: interface.implementation.pebble_function = a_function
    			is_transport_enabled: interface.implementation.is_transport_enabled

    	set_pebble_position (a_x, a_y: INTEGER_32)
    			-- Set the initial position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			pick_x_assigned: pick_x = a_x
    			pick_y_assigned: pick_y = a_y

    	set_pick_and_drop_mode
    			-- Set transport mechanism to pick and drop,
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			mode_is_pick_and_drop: mode_is_pick_and_drop

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

    	set_target_menu_mode
    			-- Set transport mechanism to target_menu.
    			-- (from EV_PICK_AND_DROPABLE_I)
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			mode_is_target_menu: mode_is_target_menu

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

    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

    	add_mask (a_mask_value: INTEGER_32)
    			-- add `a_mask_value' to the current mask.
    			-- (from WEL_TREE_VIEW_ITEM)

    	append (s: SEQUENCE [EV_TREE_NODE])
    			-- 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

    	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)

    	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)

    	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_h_item (a_h_item: POINTER)
    			-- Set h_item with `a_h_item'.
    			-- (from WEL_TREE_VIEW_ITEM)
    		ensure -- from WEL_TREE_VIEW_ITEM
    			h_item_set: h_item = a_h_item

    	set_image (image_normal: INTEGER_32; image_selected: INTEGER_32)
    			-- Set the image for the tree item to `image_normal'.
    			-- and `image_selected' for the image displayed when this
    			-- item is selected.
    			-- `image_normal' and `image_selected' are the index of
    			-- an image in the image list associated with the treeview.
    			-- (from WEL_TREE_VIEW_ITEM)

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

    	set_lparam (a_lparam: INTEGER_32)
    			-- Set `a_lparam' as current lparam.
    			-- (from WEL_TREE_VIEW_ITEM)
    		ensure -- from WEL_TREE_VIEW_ITEM
    			lparam_set: lparam = a_lparam

    	set_mask (a_mask_value: INTEGER_32)
    			-- Set mask with `a_mask_value'.
    			-- (from WEL_TREE_VIEW_ITEM)

    	set_state (a_state: INTEGER_32)
    			-- Set `a_state' as current state.
    			-- (from WEL_TREE_VIEW_ITEM)
    		ensure -- from WEL_TREE_VIEW_ITEM
    			state_set: state = a_state

    	set_text (a_text: STRING_GENERAL)
    			-- Assign `a_text' to text.
    			-- (from EV_TEXTABLE_IMP)
    		require -- from EV_TEXTABLE_I
    			a_text_not_void: a_text /= Void
    			no_carriage_returns: not a_text.has_code (('%R').natural_32_code)
    		ensure -- from EV_TEXTABLE_I
    			text_cloned: text.is_equal (a_text) and then text /= a_text

    feature -- Removal

    	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_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 -- Duplication

    	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

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

    	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)

    	hide_cursor
    			-- Hide the cursor.
    			-- (from WEL_WINDOWS_ROUTINES)

    	structure_initialize
    			-- Fill Current with zeros.
    			-- (from WEL_STRUCTURE)
    		require -- from WEL_STRUCTURE
    			exists: exists

    	initialize_with_character (a_character: CHARACTER_8)
    			-- Fill current with `a_character'.
    			-- (from WEL_STRUCTURE)
    		require -- from WEL_STRUCTURE
    			exists: exists

    	is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object considered
    			-- equal to current object?
    			-- (from WEL_STRUCTURE)
    		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

    	memory_copy (source_pointer: POINTER; length: INTEGER_32)
    			-- Copy `length' bytes from `source_pointer' to item.
    			-- (from WEL_STRUCTURE)
    		require -- from WEL_STRUCTURE
    			length_small_enough: length <= structure_size
    			length_large_enough: length > 0
    			exists: exists

    	message_beep_asterisk
    			-- Play the system asterisk waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_exclamation
    			-- Play the system exclamation waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_hand
    			-- Play the system hand waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_ok
    			-- Play the system ok waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	message_beep_question
    			-- Play the system question waveform sound.
    			-- (from WEL_WINDOWS_ROUTINES)

    	output_debug_string (s: STRING_GENERAL)
    			-- Send a string `s' to the system debugger.
    			-- (from WEL_WINDOWS_ROUTINES)
    		require -- from WEL_WINDOWS_ROUTINES
    			s_not_void: s /= Void

    	resource_string_id (an_id: INTEGER_32): STRING_32
    			-- String identified by `an_id' in the resource file.
    			-- (from WEL_WINDOWS_ROUTINES)
    		ensure -- from WEL_WINDOWS_ROUTINES
    			result_not_void: Result /= Void

    	set_cursor_position_absolute (x, y: INTEGER_32)
    			-- Set the cursor position to `x', `y'.
    			-- (from WEL_WINDOWS_ROUTINES)

    	show_cursor
    			-- Show the cursor.
    			-- (from WEL_WINDOWS_ROUTINES)

    feature -- Access EV_DRAGABLE_SOURCE.

    	dockable_dialog_target: EV_DOCKABLE_DIALOG
    			-- A dockable dialog that will be created as
    			-- necessary. This is not a local, to avoid it
    			-- being garbage collected.
    			-- (from EV_SHARED_TRANSPORT_I)

    	global_drag_targets: ARRAYED_LIST [INTEGER_32]
    			-- Shortcut to EV_APPLICATION.pnd_targets.
    			-- (from EV_SHARED_TRANSPORT_I)

    	insert_label: EV_CELL
    			-- Label used to indicate where `Current' will be placed in target.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			result_not_void: Result /= Void

    	insert_label_imp: EV_CELL_I
    			-- Once access to implementation of Insert_label.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			Result /= Void

    	insert_sep: EV_TOOL_BAR_SEPARATOR
    			-- Once access to a separator used to indicate the insertion position
    			-- when moving tool bar items.
    			-- (from EV_SHARED_TRANSPORT_I)

    	insert_sep_imp: EV_TOOL_BAR_SEPARATOR_I
    			-- Once access to implementation of Insert_sep.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			Result /= Void

    	internal_screen: EV_SCREEN
    			-- Once access to an EV_SCREEN.
    			-- (from EV_SHARED_TRANSPORT_I)

    	original_x_offset: INTEGER_16
    			-- Original x_offset and original_y_offset of transport
    			-- realtive to widget. Only used for dragable transports.
    			-- (from EV_SHARED_TRANSPORT_I)

    	original_y_offset: INTEGER_16
    			-- Original x_offset and original_y_offset of transport
    			-- realtive to widget. Only used for dragable transports.
    			-- (from EV_SHARED_TRANSPORT_I)

    	originating_source: EV_DOCKABLE_SOURCE_I
    			-- Dragable source that originated the transport of `source_being_dragged'.
    			-- (from EV_SHARED_TRANSPORT_I)

    	remove_insert_label
    			-- Remove Insert_label from its current parent.
    			-- We must handle a special case for cells. If the parent is a cell,
    			-- then we remove the cell from its parent, and then restore it.
    			-- Otherwise, when the label, removed, the cell keeps it size, and cells
    			-- are normally used with `real_target' when the cell must
    			-- not be visible.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			not_parented: insert_label.parent = Void

    	remove_insert_sep
    			-- Ensure `inset_sep' is not parented.
    			-- (from EV_SHARED_TRANSPORT_I)
    		ensure -- from EV_SHARED_TRANSPORT_I
    			not_parented: insert_sep.parent = Void

    	source_being_docked: EV_DOCKABLE_SOURCE_I
    			-- Dragable source currently being transported. May be a
    			-- WIDGET_IMP or an EV_TOOL_BAR_BUTTON_IMP.
    			-- (from EV_SHARED_TRANSPORT_I)

    feature -- Access EV_PICK_AND_DROPABLE.

    	default_accept_cursor: EV_POINTER_STYLE
    			-- Used in lieu of a user defined accept_cursor.
    			-- (from EV_SHARED_TRANSPORT_I)

    	default_deny_cursor: EV_POINTER_STYLE
    			-- Used in lieu of a user defined deny_cursor.
    			-- (from EV_SHARED_TRANSPORT_I)

    	default_pixmaps: EV_STOCK_PIXMAPS
    			-- Default pixmaps
    			-- (from EV_SHARED_TRANSPORT_I)
    		require -- from  EV_SHARED_TRANSPORT_IMP
    			True

    	global_pnd_targets: HASH_TABLE [INTEGER_32, INTEGER_32]
    			-- Shortcut to EV_APPLICATION.pnd_targets.
    			-- (from EV_SHARED_TRANSPORT_I)

    	rubber_band_is_drawn: BOOLEAN
    			-- Is a rubber band line currently on the screen?
    			-- (from EV_SHARED_TRANSPORT_I)

    feature -- Access common.

    	pointer_x: INTEGER_16
    			-- (from EV_SHARED_TRANSPORT_I)

    	pointer_y: INTEGER_16
    			-- (from EV_SHARED_TRANSPORT_I)

    feature -- Contract support

    	pixmap_equal_to (a_pixmap: EV_PIXMAP): BOOLEAN
    			-- Is `a_pixmap' equal to pixmap?
    			-- (from EV_TREE_NODE_I)
    		require -- from  EV_PIXMAPABLE_I
    			True

    feature -- Event handling

    	collapse_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when collapsed.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_I)
    		ensure -- from EV_TREE_NODE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	conforming_pick_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when a pebble that fits here is picked.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	create_collapse_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a collapse action sequence.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_TREE_NODE_ACTION_SEQUENCES_I
    			True

    	create_conforming_pick_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a conforming_pick action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_deselect_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a deselect action sequence.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_TREE_NODE_ACTION_SEQUENCES_I
    			True

    	create_expand_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a expand action sequence.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_TREE_NODE_ACTION_SEQUENCES_I
    			True

    	create_pick_actions: EV_PND_START_ACTION_SEQUENCE
    			-- Create a pick action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE
    			-- Create a pick ended action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Create a pointer_button_press action sequence.
    			-- (from EV_ITEM_ACTION_SEQUENCES_IMP)
    		require -- from  EV_ITEM_ACTION_SEQUENCES_I
    			True

    	create_pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Create a pointer_double_press action sequence.
    			-- (from EV_ITEM_ACTION_SEQUENCES_IMP)
    		require -- from  EV_ITEM_ACTION_SEQUENCES_I
    			True

    	create_pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
    			-- Create a pointer_motion action sequence.
    			-- (from EV_ITEM_ACTION_SEQUENCES_IMP)
    		require -- from  EV_ITEM_ACTION_SEQUENCES_I
    			True

    	create_select_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a select action sequence.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_TREE_NODE_ACTION_SEQUENCES_I
    			True

    	deselect_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when deselected.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_I)
    		ensure -- from EV_TREE_NODE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	drop_actions: EV_PND_ACTION_SEQUENCE
    			-- Actions to be performed when a pebble is dropped here.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	expand_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when expanded.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_I)
    		ensure -- from EV_TREE_NODE_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)

    	pick_actions: EV_PND_START_ACTION_SEQUENCE
    			-- Actions to be performed when pebble is picked up.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE
    			-- Actions to be performed when a transport from `Current' ends.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer button is pressed.
    			-- (from EV_ITEM_ACTION_SEQUENCES_I)
    		ensure -- from EV_ITEM_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer is double clicked.
    			-- (from EV_ITEM_ACTION_SEQUENCES_I)
    		ensure -- from EV_ITEM_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
    			-- Actions to be performed when screen pointer moves.
    			-- (from EV_ITEM_ACTION_SEQUENCES_I)
    		ensure -- from EV_ITEM_ACTION_SEQUENCES_I
    			not_void: Result /= Void

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

    	select_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when selected.
    			-- (from EV_TREE_NODE_ACTION_SEQUENCES_I)
    		ensure -- from EV_TREE_NODE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    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 -- Pixmap Handling

    	remove_pixmap
    			-- Remove pixmap from `Current'.
    			-- (from EV_TREE_NODE_IMP)
    		require -- from  EV_PIXMAPABLE_I
    			True
    		ensure -- from EV_PIXMAPABLE_I
    			pixmap_removed: pixmap = Void

    	set_pixmap (p: EV_PIXMAP)
    			-- Assign `p' to the displayed pixmap.
    			-- (from EV_TREE_NODE_IMP)
    		require -- from EV_PIXMAPABLE_I
    			pixmap_not_void: p /= Void

    feature -- Platform

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

    feature -- Tooltip Flag constants

    	ttf_centertip: INTEGER_32 is 2
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttf_idishwnd: INTEGER_32 is 1
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttf_rtlreading: INTEGER_32 is 4
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttf_subclass: INTEGER_32 is 16
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- Tooltip message constants

    	ttm_activate: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_addtool: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_deltool: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_enumtools: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_getcurrenttool: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_getdelaytime: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_getmaxtipwidth: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettext: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettipbkcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettiptextcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettoolcount: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_gettoolinfo: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_hittest: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_newtoolrect: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_relayevent: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_setdelaytime: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_setmaxtipwidth: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_settipbkcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_settiptextcolor: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_settoolinfo: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_updatetiptext: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttm_windowfrompoint: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- Tooltip style constants

    	tts_alwaystip: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	tts_noprefix: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    feature -- Tooltip time delay constants

    	ttdt_automatic: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttdt_autopop: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttdt_initial: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    	ttdt_reshow: INTEGER_32
    			-- (from WEL_TOOLTIP_CONSTANTS)

    invariant
    		-- from EV_PICK_AND_DROPABLE_I
    	user_interface_modes_mutually_exclusive: mode_is_pick_and_drop.to_integer + mode_is_drag_and_drop.to_integer + mode_is_target_menu.to_integer = 1
    	pebble_function_takes_two_integer_open_operands: pebble_function /= Void implies pebble_function.valid_operands ([1, 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_DYNAMIC_LIST_I
    	index_within_bounds: is_usable implies (index >= 0 and then index <= count + 1)

    		-- from EV_TREE_NODE_IMP
    	internal_children_not_void_when_not_parented: is_initialized and top_parent_imp = Void implies internal_children /= Void

    		-- 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_TREE_ITEM_IMP