indexing
	description: "Eiffel Vision tree. Mswindows implementation."
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2006-08-24 08:35:38 -0700 (Thu, 24 Aug 2006) $"
	revision: "$Revision: 62920 $"

class interface
	EV_TREE_IMP

create 
	make (an_interface: like interface)
			-- Create `Current' with interface `an_interface'.
		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)

	actual_drop_target_agent: FUNCTION [ANY, TUPLE [INTEGER_32, INTEGER_32], EV_ABSTRACT_PICK_AND_DROPABLE]
			-- Overrides default drop target on a certain position.
			-- If `Void', will use the default drop target.
			-- Always void if `Current' is not a widget.
			-- (from EV_WIDGET_I)

	all_ev_children: HASH_TABLE [EV_TREE_NODE_IMP, POINTER]
			-- Children of `Current' Classified by their h_item

	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)

	commands: WEL_COMMAND_MANAGER
			-- Command manager associated to the current window.
			-- (from WEL_WINDOW)

	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

	cursor_on_widget: CELL [EV_WIDGET_IMP]
			-- This cell contains the widget_imp that currently
			-- has the pointer of the mouse. As it is a once
			-- feature, it is a shared data.
			-- it is used for the `mouse_enter' and `mouse_leave'
			-- events.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		ensure then -- from EV_WIDGET_IMP
			result_exists: Result /= Void

	default_key_processing_handler: PREDICATE [ANY, TUPLE [EV_KEY]]
			-- Agent used to determine whether the default key processing should occur for `Current'.
			-- If agent returns `True' then default key processing continues as normal, False prevents
			-- default key processing from occuring.
			-- (from EV_WIDGET_I)

	default_parent: EV_INTERNAL_SILLY_WINDOW_IMP
			-- A default parent for creation of `Current'.
			-- (from EV_WIDGET_IMP)
		ensure -- from EV_WIDGET_IMP
			valid_parent: Result /= Void

	default_processing: BOOLEAN
			-- (from WEL_RETURN_VALUE)

	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)

	ev_children: ARRAYED_LIST [EV_TREE_NODE_IMP]
			-- List of the direct children of `Current'.

	ev_set_minimum_height (value: INTEGER_32)
			-- Make `value' the new minimum_height of `Current'.
			-- Should check if the user didn't set the minimum width
			-- before setting a new value.
			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
		require -- from  EV_SIZEABLE_IMP
			True

	ev_set_minimum_size (mw, mh: INTEGER_32)
			-- Make `mw' the new minimum_width and `mh' the new
			-- minimum_height of `Current'.
			-- Should check if the user didn't set the minimum width
			-- before setting a new value.
			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
		require -- from  EV_SIZEABLE_IMP
			True

	ev_set_minimum_width (value: INTEGER_32)
			-- Make `value' the new minimum_width of `Current'.
			-- Should check if the user didn't set the minimum width
			-- before setting a new value.
			-- (from EV_SIZEABLE_PRIMITIVE_IMP)
		require -- from  EV_SIZEABLE_IMP
			True

	focus_on_widget: CELL [EV_WIDGET_IMP]
			-- Widget that has currently the focus.
			-- (from EV_WIDGET_IMP)

	wel_font: WEL_FONT
			-- Font with which the control is drawing its text.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			exists: exists
		ensure -- from WEL_CONTROL
			result_not_void: Result /= Void

	foreground_color: EV_COLOR
			-- Color used for the foreground of `Current'.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	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)

	get_parent_item (an_item: WEL_TREE_VIEW_ITEM): WEL_TREE_VIEW_ITEM
			-- Return the parent item of the given item.
			-- (from WEL_TREE_VIEW)

	has_return_value: BOOLEAN
			-- Should the window procedure return a value?
			-- (from WEL_RETURN_VALUE)

	height: INTEGER_32
			-- Height of `Current'.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from  EV_POSITIONED_I
			True

	help_context: FUNCTION [ANY, TUPLE, EV_HELP_CONTEXT]
			-- Agent that evaluates to help context sent to help engine when help is requested
			-- (from EV_HELP_CONTEXTABLE_I)
		ensure -- from EV_HELP_CONTEXTABLE_I
			current_if_exists: internal_help_context /= Void implies Result = internal_help_context

	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

	id: INTEGER_32
			-- Control id
			-- (from WEL_CONTROL)

	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

	internal_pointer_style: EV_POINTER_STYLE
			-- Cursor displayed when screen pointer is over current widget,
			-- as seen from interface.
			-- (from EV_WIDGET_I)

	is_dock_executing: BOOLEAN
			-- Is `Current' in the process of a dockable transport?
			-- (from EV_DOCKABLE_SOURCE_I)

	is_dockable: BOOLEAN
			-- Is `Current' dockable?
			-- (from EV_DOCKABLE_SOURCE_I)

	is_external_docking_enabled: BOOLEAN
			-- Is `Current' able to be docked into an EV_DOCKABLE_DIALOG
			-- When there is no valid EV_DRAGABLE_TARGET upon completion
			-- of the transport?
			-- (from EV_DOCKABLE_SOURCE_I)

	is_external_docking_relative: BOOLEAN
			-- Will dockable dialog displayed when `Current' is docked externally
			-- be displayed relative to parent window of `Current'?
			-- Otherwise displayed as a standard window.
			-- (from EV_DOCKABLE_SOURCE_I)

	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

	key_code_from_key_string (key_string: STRING_GENERAL): INTEGER_32
			-- Key code value from `key_string'
			-- (from EV_KEY_CONSTANTS)
		require -- from EV_KEY_CONSTANTS
			key_string_not_void: key_string /= Void

	key_strings: ARRAY [STRING_32]
			-- String representations of all key codes.
			-- (from EV_KEY_CONSTANTS)

	last_item: POINTER
			-- Handle of the last item inserted
			-- (from WEL_TREE_VIEW)

	message_return_value: POINTER
			-- Return value of the window procedure.
			-- (from WEL_RETURN_VALUE)
		require -- from WEL_RETURN_VALUE
			has_return_value: has_return_value

	minimum_height: INTEGER_32
			-- Lower bound on height in pixels.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_POSITIONED_I
			True

	minimum_width: INTEGER_32
			-- Lower bound on width in pixels.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_POSITIONED_I
			True

	not_external_docking_enabled: BOOLEAN
			-- Attribute used for `is_externally_dockable'. We must implement
			-- `is_externally_dockable' this way as we have no easy solution to
			-- assign `True' to `is_externally_dockable'.
			-- (from EV_DOCKABLE_SOURCE_I)

	not_is_external_docking_relative: BOOLEAN
			-- Will dockable dialog displayed when `Current' is docked externally
			-- be displayed relative to parent window of `Current'?
			-- Otherwise displayed as a standard window.
			-- Internal reversed value of is_external_docking_relative as we cannot
			-- easily initialize a BOOLE to True in this case.
			-- (from EV_DOCKABLE_SOURCE_I)

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

	original_parent_position: INTEGER_32
			-- Original position in parent. Required
			-- to restore widget later.
			-- (from EV_DOCKABLE_SOURCE_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_CONTAINER
			-- Parent of `Current'
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

	wel_parent: WEL_WINDOW
			-- Parent window
			-- (from WEL_WINDOW)

	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)

	pixmaps_height: INTEGER_32
			-- Height of displayed pixmaps in `Current'.
			-- (from EV_ITEM_PIXMAP_SCALER_I)

	pixmaps_width: INTEGER_32
			-- Width of displayed pixmaps in `Current'.
			-- (from EV_ITEM_PIXMAP_SCALER_I)

	pointer_position: EV_COORDINATE
			-- Position of the screen pointer relative to `Current'.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		ensure -- from EV_WIDGET_I
			result_not_void: Result /= Void

	pointer_style: EV_POINTER_STYLE
			-- Pointer displayed when the pointing device is over `Current'.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from  EV_WIDGET_I
			True

	real_source: EV_DOCKABLE_SOURCE
			-- `Result' is EV_DOCKABLE_SOURCE which should be
			-- dragged when docking begins on `Current'.
			-- (from EV_DOCKABLE_SOURCE_I)

	real_target: EV_DOCKABLE_TARGET
			-- `Result' is target used during a dockable transport if
			-- mouse pointer is above `Current'.
			-- (from EV_WIDGET_I)

	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)

	screen_x: INTEGER_32
			-- Horizontal offset of `Current' relative to screen
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from  EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP
			True
		require -- from  EV_ITEM_LIST_IMP
			True

	screen_y: INTEGER_32
			-- Vertical offset of `Current' relative to screen.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from  EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP
			True
		require -- from  EV_ITEM_LIST_IMP
			True

	selected_item: EV_TREE_NODE
			-- Currently selected item.

	selected_item_imp: EV_TREE_NODE_IMP
			-- Currently selected_item_imp.
			-- Added for speed, if we did not have this,
			-- then we would have to do another reverse assigment
			-- after selected_item to get the _IMP.

	top_level_window: EV_WINDOW
			-- Top level window that contains `Current'.
			-- (from EV_WIDGET_IMP)

	top_level_window_imp: EV_WINDOW_IMP
			-- Top level window that contains `Current'.
			-- (from EV_PRIMITIVE_IMP)

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

	vk_0: INTEGER_32 is 48
			-- (from WEL_VK_CONSTANTS)

	vk_1: INTEGER_32 is 49
			-- (from WEL_VK_CONSTANTS)

	vk_2: INTEGER_32 is 50
			-- (from WEL_VK_CONSTANTS)

	vk_3: INTEGER_32 is 51
			-- (from WEL_VK_CONSTANTS)

	vk_4: INTEGER_32 is 52
			-- (from WEL_VK_CONSTANTS)

	vk_5: INTEGER_32 is 53
			-- (from WEL_VK_CONSTANTS)

	vk_6: INTEGER_32 is 54
			-- (from WEL_VK_CONSTANTS)

	vk_7: INTEGER_32 is 55
			-- (from WEL_VK_CONSTANTS)

	vk_8: INTEGER_32 is 56
			-- (from WEL_VK_CONSTANTS)

	vk_9: INTEGER_32 is 57
			-- Vk_a thru Vk_z are the same as their ASCII equivalents: 'A' thru 'Z'.
			-- (from WEL_VK_CONSTANTS)

	vk_a: INTEGER_32 is 65
			-- (from WEL_VK_CONSTANTS)

	vk_add: INTEGER_32 is 107
			-- Declared in Windows as VK_ADD
			-- (from WEL_VK_CONSTANTS)

	vk_alt: INTEGER_32 is 18
			-- Declared in Windows as VK_MENU
			-- Was declared in WEL_VK_CONSTANTS as synonym of Vk_menu.
			-- (from WEL_VK_CONSTANTS)

	vk_apps: INTEGER_32 is 93
			-- Declared in Windows as VK_APPS
			-- Vk_0 thru Vk_9 are the same as their ASCII equivalents: '0' thru '9'.
			-- (from WEL_VK_CONSTANTS)

	vk_b: INTEGER_32 is 66
			-- (from WEL_VK_CONSTANTS)

	vk_back: INTEGER_32 is 8
			-- Declared in Windows as VK_BACK
			-- (from WEL_VK_CONSTANTS)

	vk_c: INTEGER_32 is 67
			-- (from WEL_VK_CONSTANTS)

	vk_cancel: INTEGER_32 is 3
			-- Declared in Windows as VK_CANCEL
			-- (from WEL_VK_CONSTANTS)

	vk_capital: INTEGER_32 is 20
			-- Declared in Windows as VK_CAPITAL
			-- (from WEL_VK_CONSTANTS)

	vk_clear: INTEGER_32 is 12
			-- Declared in Windows as VK_CLEAR
			-- (from WEL_VK_CONSTANTS)

	vk_control: INTEGER_32 is 17
			-- Declared in Windows as VK_CONTROL
			-- (from WEL_VK_CONSTANTS)

	vk_d: INTEGER_32 is 68
			-- (from WEL_VK_CONSTANTS)

	vk_decimal: INTEGER_32 is 110
			-- Declared in Windows as VK_DECIMAL
			-- (from WEL_VK_CONSTANTS)

	vk_delete: INTEGER_32 is 46
			-- Declared in Windows as VK_DELETE
			-- (from WEL_VK_CONSTANTS)

	vk_divide: INTEGER_32 is 111
			-- Declared in Windows as VK_DIVIDE
			-- (from WEL_VK_CONSTANTS)

	vk_down: INTEGER_32 is 40
			-- Declared in Windows as VK_DOWN
			-- (from WEL_VK_CONSTANTS)

	vk_e: INTEGER_32 is 69
			-- (from WEL_VK_CONSTANTS)

	vk_end: INTEGER_32 is 35
			-- Declared in Windows as VK_END
			-- (from WEL_VK_CONSTANTS)

	vk_escape: INTEGER_32 is 27
			-- Declared in Windows as VK_ESCAPE
			-- (from WEL_VK_CONSTANTS)

	vk_execute: INTEGER_32 is 43
			-- Declared in Windows as VK_EXECUTE
			-- (from WEL_VK_CONSTANTS)

	vk_f: INTEGER_32 is 70
			-- (from WEL_VK_CONSTANTS)

	vk_f1: INTEGER_32 is 112
			-- Declared in Windows as VK_F1
			-- (from WEL_VK_CONSTANTS)

	vk_f10: INTEGER_32 is 121
			-- Declared in Windows as VK_F10
			-- (from WEL_VK_CONSTANTS)

	vk_f11: INTEGER_32 is 122
			-- Declared in Windows as VK_F11
			-- (from WEL_VK_CONSTANTS)

	vk_f12: INTEGER_32 is 123
			-- Declared in Windows as VK_F12
			-- (from WEL_VK_CONSTANTS)

	vk_f13: INTEGER_32 is 124
			-- Declared in Windows as VK_F13
			-- (from WEL_VK_CONSTANTS)

	vk_f14: INTEGER_32 is 125
			-- Declared in Windows as VK_F14
			-- (from WEL_VK_CONSTANTS)

	vk_f15: INTEGER_32 is 126
			-- Declared in Windows as VK_F15
			-- (from WEL_VK_CONSTANTS)

	vk_f16: INTEGER_32 is 127
			-- Declared in Windows as VK_F16
			-- (from WEL_VK_CONSTANTS)

	vk_f17: INTEGER_32 is 128
			-- Declared in Windows as VK_F17
			-- (from WEL_VK_CONSTANTS)

	vk_f18: INTEGER_32 is 129
			-- Declared in Windows as VK_F18
			-- (from WEL_VK_CONSTANTS)

	vk_f19: INTEGER_32 is 130
			-- Declared in Windows as VK_F19
			-- (from WEL_VK_CONSTANTS)

	vk_f2: INTEGER_32 is 113
			-- Declared in Windows as VK_F2
			-- (from WEL_VK_CONSTANTS)

	vk_f20: INTEGER_32 is 131
			-- Declared in Windows as VK_F20
			-- (from WEL_VK_CONSTANTS)

	vk_f21: INTEGER_32 is 132
			-- Declared in Windows as VK_F21
			-- (from WEL_VK_CONSTANTS)

	vk_f22: INTEGER_32 is 133
			-- Declared in Windows as VK_F22
			-- (from WEL_VK_CONSTANTS)

	vk_f23: INTEGER_32 is 134
			-- Declared in Windows as VK_F23
			-- (from WEL_VK_CONSTANTS)

	vk_f24: INTEGER_32 is 135
			-- Declared in Windows as VK_F24
			-- (from WEL_VK_CONSTANTS)

	vk_f3: INTEGER_32 is 114
			-- Declared in Windows as VK_F3
			-- (from WEL_VK_CONSTANTS)

	vk_f4: INTEGER_32 is 115
			-- Declared in Windows as VK_F4
			-- (from WEL_VK_CONSTANTS)

	vk_f5: INTEGER_32 is 116
			-- Declared in Windows as VK_F5
			-- (from WEL_VK_CONSTANTS)

	vk_f6: INTEGER_32 is 117
			-- Declared in Windows as VK_F6
			-- (from WEL_VK_CONSTANTS)

	vk_f7: INTEGER_32 is 118
			-- Declared in Windows as VK_F7
			-- (from WEL_VK_CONSTANTS)

	vk_f8: INTEGER_32 is 119
			-- Declared in Windows as VK_F8
			-- (from WEL_VK_CONSTANTS)

	vk_f9: INTEGER_32 is 120
			-- Declared in Windows as VK_F9
			-- (from WEL_VK_CONSTANTS)

	vk_g: INTEGER_32 is 71
			-- (from WEL_VK_CONSTANTS)

	vk_h: INTEGER_32 is 72
			-- (from WEL_VK_CONSTANTS)

	vk_help: INTEGER_32 is 47
			-- Declared in Windows as VK_HELP
			-- (from WEL_VK_CONSTANTS)

	vk_home: INTEGER_32 is 36
			-- Declared in Windows as VK_HOME
			-- (from WEL_VK_CONSTANTS)

	vk_i: INTEGER_32 is 73
			-- (from WEL_VK_CONSTANTS)

	vk_insert: INTEGER_32 is 45
			-- Declared in Windows as VK_INSERT
			-- (from WEL_VK_CONSTANTS)

	vk_j: INTEGER_32 is 74
			-- (from WEL_VK_CONSTANTS)

	vk_k: INTEGER_32 is 75
			-- (from WEL_VK_CONSTANTS)

	vk_l: INTEGER_32 is 76
			-- (from WEL_VK_CONSTANTS)

	vk_lbutton: INTEGER_32 is 1
			-- Declared in Windows as VK_LBUTTON
			-- (from WEL_VK_CONSTANTS)

	vk_lcontrol: INTEGER_32 is 162
			-- Declared in Windows as VK_LCONTROL
			-- (from WEL_VK_CONSTANTS)

	vk_left: INTEGER_32 is 37
			-- Declared in Windows as VK_LEFT
			-- (from WEL_VK_CONSTANTS)

	vk_lmenu: INTEGER_32 is 164
			-- Declared in Windows as VK_LMENU
			-- (from WEL_VK_CONSTANTS)

	vk_lshift: INTEGER_32 is 160
			-- Declared in Windows as VK_LSHIFT
			-- (from WEL_VK_CONSTANTS)

	vk_m: INTEGER_32 is 77
			-- (from WEL_VK_CONSTANTS)

	vk_mbutton: INTEGER_32 is 4
			-- Declared in Windows as VK_MBUTTON
			-- (from WEL_VK_CONSTANTS)

	vk_menu: INTEGER_32 is 18
			-- Declared in Windows as VK_MENU
			-- Was declared in WEL_VK_CONSTANTS as synonym of Vk_alt.
			-- (from WEL_VK_CONSTANTS)

	vk_multiply: INTEGER_32 is 106
			-- Declared in Windows as VK_MULTIPLY
			-- (from WEL_VK_CONSTANTS)

	vk_n: INTEGER_32 is 78
			-- (from WEL_VK_CONSTANTS)

	vk_next: INTEGER_32 is 34
			-- Declared in Windows as VK_NEXT
			-- (from WEL_VK_CONSTANTS)

	vk_numlock: INTEGER_32 is 144
			-- Declared in Windows as VK_NUMLOCK
			-- (from WEL_VK_CONSTANTS)

	vk_numpad0: INTEGER_32 is 96
			-- Declared in Windows as VK_NUMPAD0
			-- (from WEL_VK_CONSTANTS)

	vk_numpad1: INTEGER_32 is 97
			-- Declared in Windows as VK_NUMPAD1
			-- (from WEL_VK_CONSTANTS)

	vk_numpad2: INTEGER_32 is 98
			-- Declared in Windows as VK_NUMPAD2
			-- (from WEL_VK_CONSTANTS)

	vk_numpad3: INTEGER_32 is 99
			-- Declared in Windows as VK_NUMPAD3
			-- (from WEL_VK_CONSTANTS)

	vk_numpad4: INTEGER_32 is 100
			-- Declared in Windows as VK_NUMPAD4
			-- (from WEL_VK_CONSTANTS)

	vk_numpad5: INTEGER_32 is 101
			-- Declared in Windows as VK_NUMPAD5
			-- (from WEL_VK_CONSTANTS)

	vk_numpad6: INTEGER_32 is 102
			-- Declared in Windows as VK_NUMPAD6
			-- (from WEL_VK_CONSTANTS)

	vk_numpad7: INTEGER_32 is 103
			-- Declared in Windows as VK_NUMPAD7
			-- (from WEL_VK_CONSTANTS)

	vk_numpad8: INTEGER_32 is 104
			-- Declared in Windows as VK_NUMPAD8
			-- (from WEL_VK_CONSTANTS)

	vk_numpad9: INTEGER_32 is 105
			-- Declared in Windows as VK_NUMPAD9
			-- (from WEL_VK_CONSTANTS)

	vk_o: INTEGER_32 is 79
			-- (from WEL_VK_CONSTANTS)

	vk_p: INTEGER_32 is 80
			-- (from WEL_VK_CONSTANTS)

	vk_pause: INTEGER_32 is 19
			-- Declared in Windows as VK_PAUSE
			-- (from WEL_VK_CONSTANTS)

	vk_print: INTEGER_32 is 42
			-- Declared in Windows as VK_PRINT
			-- (from WEL_VK_CONSTANTS)

	vk_prior: INTEGER_32 is 33
			-- Declared in Windows as VK_PRIOR
			-- (from WEL_VK_CONSTANTS)

	vk_q: INTEGER_32 is 81
			-- (from WEL_VK_CONSTANTS)

	vk_r: INTEGER_32 is 82
			-- (from WEL_VK_CONSTANTS)

	vk_rbutton: INTEGER_32 is 2
			-- Declared in Windows as VK_RBUTTON
			-- (from WEL_VK_CONSTANTS)

	vk_rcontrol: INTEGER_32 is 163
			-- Declared in Windows as VK_RCONTROL
			-- (from WEL_VK_CONSTANTS)

	vk_return: INTEGER_32 is 13
			-- Declared in Windows as VK_RETURN
			-- (from WEL_VK_CONSTANTS)

	vk_right: INTEGER_32 is 39
			-- Declared in Windows as VK_RIGHT
			-- (from WEL_VK_CONSTANTS)

	vk_rmenu: INTEGER_32 is 165
			-- Declared in Windows as VK_RMENU
			-- (from WEL_VK_CONSTANTS)

	vk_rshift: INTEGER_32 is 161
			-- Declared in Windows as VK_RSHIFT
			-- (from WEL_VK_CONSTANTS)

	vk_s: INTEGER_32 is 83
			-- (from WEL_VK_CONSTANTS)

	vk_scroll: INTEGER_32 is 145
			-- Declared in Windows as VK_SCROLL
			-- (from WEL_VK_CONSTANTS)

	vk_select: INTEGER_32 is 41
			-- Declared in Windows as VK_SELECT
			-- (from WEL_VK_CONSTANTS)

	vk_separator: INTEGER_32 is 108
			-- Declared in Windows as VK_SEPARATOR
			-- (from WEL_VK_CONSTANTS)

	vk_shift: INTEGER_32 is 16
			-- Declared in Windows as VK_SHIFT
			-- (from WEL_VK_CONSTANTS)

	vk_snapshot: INTEGER_32 is 44
			-- Declared in Windows as VK_SNAPSHOT
			-- (from WEL_VK_CONSTANTS)

	vk_space: INTEGER_32 is 32
			-- Declared in Windows as VK_SPACE
			-- (from WEL_VK_CONSTANTS)

	vk_subtract: INTEGER_32 is 109
			-- Declared in Windows as VK_SUBTRACT
			-- (from WEL_VK_CONSTANTS)

	vk_t: INTEGER_32 is 84
			-- (from WEL_VK_CONSTANTS)

	vk_tab: INTEGER_32 is 9
			-- Declared in Windows as VK_TAB
			-- (from WEL_VK_CONSTANTS)

	vk_u: INTEGER_32 is 85
			-- (from WEL_VK_CONSTANTS)

	vk_up: INTEGER_32 is 38
			-- Declared in Windows as VK_UP
			-- (from WEL_VK_CONSTANTS)

	vk_v: INTEGER_32 is 86
			-- (from WEL_VK_CONSTANTS)

	vk_w: INTEGER_32 is 87
			-- (from WEL_VK_CONSTANTS)

	vk_x: INTEGER_32 is 88
			-- (from WEL_VK_CONSTANTS)

	vk_y: INTEGER_32 is 89
			-- (from WEL_VK_CONSTANTS)

	vk_z: INTEGER_32 is 90
			-- (from WEL_VK_CONSTANTS)

	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)
		require -- from  EV_DOCKABLE_SOURCE_I
			True

	width: INTEGER_32
			-- Width of `Current'.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from  EV_POSITIONED_I
			True

	x_position: INTEGER_32
			-- `Result' is x_position of `Current' in pixels.
			-- If wel_parent not Void then `Result' is relative to wel_parent else
			-- `Result' is relative to screen.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from  EV_POSITIONED_I
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			wel_parent = Void implies Result = absolute_x

	y_position: INTEGER_32
			-- `Result' is x_position of `Current' in pixels.
			-- If wel_parent not Void then `Result' is relative to wel_parent else
			-- `Result' is relative to screen.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from  EV_POSITIONED_I
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			wel_parent = Void implies Result = absolute_y
	
feature -- Measurement

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

	absolute_x: INTEGER_32
			-- Absolute x position
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			Result = window_rect.x

	absolute_y: INTEGER_32
			-- Absolute y position
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			Result = window_rect.y

	background_brush: WEL_BRUSH
			-- Current window background color used to refresh the window when
			-- requested by the WM_ERASEBKGND windows message.
			-- By default there is no background
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			new_object: Result /= Void implies Result /= background_brush

	captured_window: WEL_WINDOW
			-- Current window which has been captured.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			window_captured: window_captured

	client_rect: WEL_RECT
			-- Client rectangle
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	closest_dockable_target: EV_DOCKABLE_TARGET
			-- `Result' is first dockable target that is_dockable found by recursively
			-- searching up through the parenting structure from the widget
			-- currently underneath the pointer position.
			-- `Result' will be `Void' if a dockable target is not found.
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			result_is_dockable: Result /= Void implies Result.is_docking_enabled

	command (message: INTEGER_32): WEL_COMMAND
			-- Command associated to `message'
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
			command_exists: command_exists (message)
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	command_argument (message: INTEGER_32): ANY
			-- Command argument associated to `message'
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
			command_exists: command_exists (message)

	command_exists (message: INTEGER_32): BOOLEAN
			-- Does a command associated to `message' exist?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0

	commands_enabled: BOOLEAN
			-- Is the commands execution enabled?
			-- (from WEL_WINDOW)

	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

	total_count: INTEGER_32
			-- Number of items in the tree view window
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
		ensure -- from WEL_TREE_VIEW
			positive_result: Result >= 0

	destroyed: BOOLEAN
			-- Is `Current' destroyed ?
			-- (from EV_WIDGET_IMP)

	is_sensitive: BOOLEAN
			-- Is the window enabled for mouse and keyboard input?
			-- (from WEL_WINDOW)
		require -- from  EV_SENSITIVE_I
			True
		require -- from WEL_WINDOW
			exists: exists

	ex_style: INTEGER_32
			-- Window ex_style
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	exists: BOOLEAN
			-- Does the item exist?
			-- (from WEL_ANY)
		require -- from  EV_WIDGET_IMP
			True
		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

	focused_window: WEL_WINDOW
			-- Current window which has the focus.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

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

	get_background_color: WEL_COLOR_REF
			-- `Result' is background color used for control.
			-- (from WEL_TREE_VIEW)

	get_image_list: WEL_IMAGE_LIST
			-- Get the image list associated with this treeview.
			-- Returns Void if none.
			-- (from WEL_TREE_VIEW)

	get_item_rect (an_item: WEL_TREE_VIEW_ITEM): WEL_RECT
			-- `Result' is rect of item `an_item' or `Void'
			-- if `an_item' is not visible.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			an_item_not_void: an_item /= Void

	get_item_text_rect (an_item: WEL_TREE_VIEW_ITEM): WEL_RECT
			-- `Result' is rect for text of `an_item' or `Void'
			-- if `an_item' is not visible.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			an_item_not_void: an_item /= Void

	get_next_target (a_widget: EV_WIDGET): EV_DOCKABLE_TARGET
			-- `Result' is next dockable target that is is_dockable found by
			-- recursively seraching up the parenting structure from `current_target'.
			-- `Result' will be `Void' if none.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			a_widget_not_void: a_widget /= Void
		ensure -- from EV_DOCKABLE_SOURCE_I
			result_is_dockable: Result /= Void implies Result.is_docking_enabled

	get_text_color: WEL_COLOR_REF
			-- `Result' is color for item text.
			-- (from WEL_TREE_VIEW)

	get_tooltip: WEL_TOOLTIP
			-- `Result' is tooltip associated with `Current'.
			-- (from WEL_TREE_VIEW)

	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_capture: BOOLEAN
			-- Does `Current' have capture?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

	wel_has_capture: BOOLEAN
			-- Does this window have the capture?
			-- (from WEL_WINDOW)
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	has_focus: BOOLEAN
			-- Does this window have the focus?
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	has_heavy_capture: BOOLEAN
			-- Does this window have the heavy capture?
			-- (from WEL_WINDOW)

	has_horizontal_scroll_bar: BOOLEAN
			-- Does this window have a horizontal scroll bar?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	has_item (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Does `an_item' exist in the tree?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			item_not_void: an_item /= Void
			item_valid: an_item.exists
		ensure -- from WEL_TREE_VIEW
			mask_unchanged: an_item.mask = old an_item.mask

	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

	has_system_font: BOOLEAN
			-- Does the control use the system font?
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			exists: exists

	has_vertical_scroll_bar: BOOLEAN
			-- Does this window have a vertical scroll bar?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	heavy_capture_activated: BOOLEAN
			-- Is the heavy capture currently running?
			-- (i.e. is there a window in the current program
			-- with has_heavy_capture to True?)
			-- (from WEL_WINDOW)

	wel_height: INTEGER_32
			-- Window height
			-- (from WEL_WINDOW)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	indent: INTEGER_32
			-- Amout, in pixels, that child items are indented
			-- relative to their parent items.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	internal_non_sensitive: BOOLEAN
			-- Is `Current' not sensitive to input as seen
			-- from interface?
			-- (from EV_SENSITIVE_I)

	is_bold (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Is `an_item' bold?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	is_cut (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Is `an_item' selected as part of a cut and paste
			-- operation?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	is_drophilited (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Is `an_item' selected as a drag ans drop target?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	is_expanded (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Is `an_item' expanded?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	is_inside: BOOLEAN
			-- Is the current window inside another window?
			-- (from WEL_WINDOW)

	is_parent (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Is `an_item' a parent of other items?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	is_selected (an_item: WEL_TREE_VIEW_ITEM): BOOLEAN
			-- Is `an_item' selected?
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	is_show_requested: BOOLEAN
			-- Is `Current' displayed in its parent?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from  EV_WIDGET_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)

	managed: BOOLEAN is True
			-- All widgets are managed.
			-- (from EV_WIDGET_IMP)

	maximal_height: INTEGER_32
			-- Maximal height allowed for the window
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			result_large_enough: Result >= minimal_height

	maximal_width: INTEGER_32
			-- Maximal width allowed for the window
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			result_large_enough: Result >= minimal_width

	maximized: BOOLEAN
			-- Is the window maximized?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	minimal_height: INTEGER_32
			-- Minimal height allowed for the window
			-- Zero by default.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			positive_result: Result >= 0
			result_small_enough: Result <= maximal_height

	minimal_width: INTEGER_32
			-- Minimal width allowed for the window
			-- Zero by default.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			positive_result: Result >= 0
			result_small_enough: Result <= maximal_width

	minimized: BOOLEAN
			-- Is the window minimized?
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	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)

	placement: WEL_WINDOW_PLACEMENT
			-- Window placement information
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	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))

	selected: BOOLEAN
			-- Is an item selected?
			-- (from WEL_TREE_VIEW)
		require -- from  EV_TREE_I
			True
		require -- from WEL_TREE_VIEW
			exists: exists

	wel_selected_item: WEL_TREE_VIEW_ITEM
			-- Return the currently selected item.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			selected: selected
		ensure -- from WEL_TREE_VIEW
			item_valid: Result.exists

	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)

	is_displayed: BOOLEAN
			-- Is the window shown?
			-- (from WEL_WINDOW)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	style: INTEGER_32
			-- Window style
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	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: STRING_32
			-- Window text
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	text_length: INTEGER_32
			-- Text length
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			positive_result: Result >= 0

	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

	user_is_sensitive: BOOLEAN
			-- Is the object sensitive to user input.
			-- (from EV_SENSITIVE_I)

	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)

	visible_count: INTEGER_32
			-- Number of items that will fit into the tree
			-- view window
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
		ensure -- from WEL_TREE_VIEW
			positive_result: Result >= 0

	wel_width: INTEGER_32
			-- Window width
			-- (from WEL_WINDOW)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	window_captured: BOOLEAN
			-- Has a window been captured?
			-- (from WEL_WINDOW)

	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"))

	window_rect: WEL_RECT
			-- Window rectangle (absolute position)
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			result_not_void: Result /= Void

	windows_directory: STRING_32
			-- Path of the Windows directory
			-- (from WEL_WINDOWS_ROUTINES)
		ensure -- from WEL_WINDOWS_ROUTINES
			result_not_void: Result /= Void
	
feature {ANY} -- Status report

	valid_hwnd_constant (c: POINTER): BOOLEAN
			-- Is `c' a valid hwnd constant?
			-- (from WEL_HWND_CONSTANTS)
	
feature -- Status setting

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

	check_dragable_release (a_x, a_y: INTEGER_32)
			-- End transport if in drag and drop.
			-- (from EV_DOCKABLE_SOURCE_IMP)
		require -- from  EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP
			True

	deselect_item (an_item: WEL_TREE_VIEW_ITEM)
			-- Deselect the given item.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)
		ensure -- from WEL_TREE_VIEW
			item_deselected: not is_selected (an_item)

	disable
			-- Disable mouse and keyboard input
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			disabled: not is_sensitive

	disable_capture
			-- Release all user events.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_PICK_AND_DROPABLE_I
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True

	disable_commands
			-- Disable commands execution.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			commands_disabled: not commands_enabled

	disable_default_processing
			-- Disable default window processing.
			-- The standard window procedure will not be called for
			-- each messages received by the window and then the
			-- normal behavior will not occur.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP
			True
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_WINDOW
			default_processing_disabled: not default_processing

	disable_dockable
			-- Ensure `Current' is not dockable
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_is_dockable: not is_dockable

	disable_drag_accept_files
			-- Disallow `Current' from being a file drag and drop target.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists

	disable_external_docking
			-- Forbid `Current' to be docked into an EV_DOCKABLE_DIALOG
			-- When there is no valid EV_DRAGABLE_TARGET upon completion
			-- of the transport?
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_externally_dockable: not is_external_docking_enabled

	disable_external_docking_relative
			-- Assign `False' to is_external_docking_relative, ensuring that
			-- a dockable dialog displayed when `Current' is docked externally
			-- is displayed as a standard window.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			external_docking_enabled: is_external_docking_enabled
		ensure -- from EV_DOCKABLE_SOURCE_I
			external_docking_not_relative: not is_external_docking_relative

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

	disable_sensitive
			-- Set `Current' to insensitive mode.
			-- This means that any events with an
			-- event type of KeyPress, KeyRelease,
			-- ButtonPress, ButtonRelease, MotionNotify,
			-- EnterNotify, LeaveNotify, FocusIn or
			-- FocusOut will not be dispatched to current
			-- widget and to all its children.  Set it to
			-- sensitive mode otherwise.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	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

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

	dragable_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
			-- Process `a_button' to start/stop the drag/pick and
			-- drop mechanism.
			-- (from EV_DOCKABLE_SOURCE_IMP)
		require -- from  EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP
			True

	enable
			-- Enable mouse and keyboard input.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			enabled: is_sensitive

	enable_capture
			-- Enable capture.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_PICK_AND_DROPABLE_I
			True

	enable_commands
			-- Enable commands execution.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			commands_enabled: commands_enabled

	enable_default_processing
			-- Enable default window processing.
			-- The standard window procedure will be called for
			-- each messages received by the window and then the
			-- normal behavior will occur.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			default_processing_enabled: default_processing

	enable_dockable
			-- Allow `Current' to be dockable
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable

	enable_drag_accept_files
			-- Allow `Current' to be a file drag and drop target.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists

	enable_external_docking
			-- Allow `Current' to be docked into an EV_DOCKABLE_DIALOG
			-- When there is no valid EV_DRAGABLE_TARGET upon completion
			-- of the transport?
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
		ensure -- from EV_DOCKABLE_SOURCE_I
			is_externally_dockable: is_external_docking_enabled

	enable_external_docking_relative
			-- Assign `True' to is_external_docking_relative, ensuring that
			-- a dockable dialog displayed when `Current' is docked externally
			-- is displayed relative to the top level window.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			external_docking_enabled: is_external_docking_enabled
		ensure -- from EV_DOCKABLE_SOURCE_I
			external_docking_not_relative: is_external_docking_relative

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

	enable_sensitive
			-- Set `Current' to sensitive mode.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	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

	has_parent: BOOLEAN
			-- Is `Current' parented?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	hide
			-- Hide `Current'.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			hidden: not is_displayed

	maximize
			-- Maximize the window
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			maximized: maximized

	minimize
			-- Minimize the window and display its icon
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			minimized: minimized

	parent_is_sensitive: BOOLEAN
			-- Is parent of `Current' sensitive?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_SENSITIVE_I
			True

	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)

	release_capture
			-- Release the mouse capture after a call
			-- to set_capture.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
			has_capture: wel_has_capture
		ensure -- from WEL_WINDOW
			not_has_capture: not wel_has_capture

	release_heavy_capture
			-- Release the mouse capture after a call
			-- to set_heavy_capture.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
			has_heavy_capture: has_heavy_capture
			heavy_capture_activated: heavy_capture_activated
		ensure -- from WEL_WINDOW
			heavy_capture_set: not has_heavy_capture
			heavy_capture_deactivated: not heavy_capture_activated

	remove_default_key_processing_handler
			-- Ensure default_key_processing_handler is Void.
			-- (from EV_WIDGET_I)
		ensure -- from EV_WIDGET_I
			default_key_processing_handler_removed: default_key_processing_handler = Void

	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

	remove_real_source
			-- Ensure real_source is `Void'.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
		ensure -- from EV_DOCKABLE_SOURCE_I
			real_source_void: real_source = Void

	remove_real_target
			-- Ensure real_target is `Void'.
			-- (from EV_WIDGET_I)
		ensure -- from EV_WIDGET_I
			real_target_void: real_target = Void

	restore
			-- Restore the window to its
			-- original size and position after
			-- minimize or maximize
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	select_drop_target (an_item: WEL_TREE_VIEW_ITEM)
			-- Redraw the given `an_item' in the style used to
			-- indicate the target of a drag and drop operation.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	select_first_visible (an_item: WEL_TREE_VIEW_ITEM)
			-- Scrolls the tree view vertically so that
			-- the given `an_item' is the first visible item.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)

	select_item (an_item: WEL_TREE_VIEW_ITEM)
			-- Set the selection to the given `an_item'.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			valid_item: has_item (an_item)
		ensure -- from WEL_TREE_VIEW
			item_selected: is_selected (an_item)

	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_actual_drop_target_agent (an_agent: like actual_drop_target_agent)
			-- Assign `an_agent' to actual_drop_target_agent.
			-- (from EV_WIDGET_I)
		require -- from EV_WIDGET_I
			an_agent_not_void: an_agent /= Void
		ensure -- from EV_WIDGET_I
			assigned: actual_drop_target_agent = an_agent

	wel_set_background_color (a_color: WEL_COLOR_REF)
			-- Assign `a_color' to background color.
			-- (from WEL_TREE_VIEW)

	set_capture
			-- Set the mouse capture to the `Current' window.
			-- Once the window has captured the mouse, all
			-- mouse input is directed to this window, regardless
			-- of whether the cursor is over that window. Only
			-- one window can have the mouse capture at a time.
			--
			-- Works only for windows in the same thread as your
			-- application.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
			has_not_capture: not wel_has_capture
			has_not_heavy_capture: not has_heavy_capture
		ensure -- from WEL_WINDOW
			has_capture: wel_has_capture

	set_default_key_processing_handler (a_handler: like default_key_processing_handler)
			-- Assign default_key_processing_handler to `a_handler'.
			-- (from EV_WIDGET_I)

	set_default_minimum_size
			-- Initialize the size of `Current'.
			-- Redefined by many widgets.
			-- (from EV_WIDGET_IMP)

	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_ex_style (an_ex_style: INTEGER_32)
			-- Set `an_ex_style' with ex_style.
			--
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	set_focus
			-- Set the focus to `Current'
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	set_heavy_capture
			-- Set the mouse capture to the `Current' window.
			-- Once the window has captured the mouse, all
			-- mouse input is directed to this window, regardless
			-- of whether the cursor is over that window. Only
			-- one window can have the mouse capture at a time.
			--
			-- Works for ALL windows.
			-- (from WEL_WINDOW)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
			has_not_heavy_capture: not has_heavy_capture
			heavy_capture_deactivated: not heavy_capture_activated
		ensure -- from WEL_WINDOW
			heavy_capture_set: has_heavy_capture implies heavy_capture_activated

	set_image_list (an_imagelist: WEL_IMAGE_LIST)
			-- Set the current image list to `an_imagelist'.
			-- If `an_imagelist' is set to Void, it removes
			-- the current associated image list (if any).
			-- (from WEL_TREE_VIEW)

	set_indent (an_indent: INTEGER_32)
			-- Set indent with `an_indent'.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	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_pixmaps_size (a_width: INTEGER_32; a_height: INTEGER_32)
			-- Set the size of displayed pixmaps in `Current' to
			-- `a_width' by `a_height'.
			-- (from EV_ITEM_PIXMAP_SCALER_I)
		ensure -- from EV_ITEM_PIXMAP_SCALER_I
			width_set: pixmaps_width = a_width
			height_set: pixmaps_height = a_height

	set_real_source (dockable_source: EV_DOCKABLE_SOURCE)
			-- Set `dockable_source' to be the widget moved when a
			-- drag begins on `Current'.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			is_dockable: is_dockable
			dockable_source_not_void: dockable_source /= Void
		ensure -- from EV_DOCKABLE_SOURCE_I
			real_source_assigned: real_source = dockable_source

	set_real_target (a_target: EV_DOCKABLE_TARGET)
			-- Assign `a_target' to real_target.
			-- (from EV_WIDGET_I)
		require -- from EV_WIDGET_I
			target_not_void: a_target /= Void
		ensure -- from EV_WIDGET_I
			assigned: real_target = a_target

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

	set_style (a_style: INTEGER_32)
			-- Set style with `a_style'.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	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_text_color (a_color: WEL_COLOR_REF)
			-- Assign `a_color' to color of item text.
			-- (from WEL_TREE_VIEW)

	wel_set_tooltip (tooltip: WEL_TOOLTIP)
			-- (from WEL_TREE_VIEW)

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

	show
			-- Show `Current'.
			-- Need to notify the parent.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from WEL_WINDOW
			exists: exists

	update_cached_style (new_ex_style, old_ex_style: INTEGER_32)
			-- Update Window cache buffer for Window style.
			-- (from WEL_WINDOW)

	user_disable_sensitive
			-- Make object desensitive to user input.
			-- (from EV_SENSITIVE_I)
		ensure -- from EV_SENSITIVE_I
			is_desensitive: not user_is_sensitive

	user_enable_sensitive
			-- Make object sensitive to user input.
			-- (from EV_SENSITIVE_I)
		ensure -- from EV_SENSITIVE_I
			is_sensitive_if_parent_sensitive: (has_parent and then parent_is_sensitive) implies interface.implementation.is_sensitive
			is_sensitive_if_orphaned: not has_parent implies interface.implementation.is_sensitive
	
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_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

	delete_item (an_item: WEL_TREE_VIEW_ITEM)
			-- Remove `an_item' from the tree.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			item_not_void: an_item /= Void
			valid_item: has_item (an_item)
			has_items: total_count > 0

	disable_redraw
			-- Disable redrawing of `Current' until next call to enable_redraw.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	enable_redraw
			-- Ensure `Current' is redrawn as required.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	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)

	has_system_window_locked: BOOLEAN
			-- Is there any window locked ?
			-- (from WEL_WINDOW)

	wel_insert_item (an_item: WEL_TREE_VIEW_INSERT_STRUCT)
			-- Insert `an_item' in the tree.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			an_item_not_void: an_item /= Void
			an_item_exists: an_item.exists
		ensure -- from WEL_TREE_VIEW
			new_count: total_count = old total_count + 1

	lock_window_update
			-- Disables drawing in the current window. A locked window cannot be moved.
			-- Only one window can be locked at a time. To unlock a window locked with
			-- lock_window_update , call 'unlock_window_update'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			has_system_window_locked

	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)

	remove_help_context
			-- Remove key press action associated with `EV_APPLICATION.help_key'.
			-- (from EV_HELP_CONTEXTABLE_I)
		require -- from EV_HELP_CONTEXTABLE_I
			help_context_not_void: help_context /= Void
		ensure -- from EV_HELP_CONTEXTABLE_I
			no_help_context: internal_help_context = Void

	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)

	reset_content
			-- Remove all `items' from `Current'.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			has_items: total_count > 0

	set_default_colors
			-- Set foreground and background color to their default values.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	wel_set_font (a_font: WEL_FONT)
			-- Set `font' with `a_font'.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			exists: exists
			a_font_not_void: a_font /= Void
			a_font_exists: a_font.exists
		ensure -- from WEL_CONTROL
			font_set: not has_system_font implies wel_font.item = a_font.item

	set_help_context (an_help_context: like help_context)
			-- Assign `a_help_context' to help_context.
			-- Assign `an_help_context' to help_context.
			-- (from EV_HELP_CONTEXTABLE_I)
		require -- from EV_HELP_CONTEXTABLE_I
			an_help_context_not_void: an_help_context /= Void
		ensure -- from EV_HELP_CONTEXTABLE_I
			help_context_assigned: help_context.is_equal (an_help_context)

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

	set_parent (par: EV_CONTAINER)
			-- Make `par' the new parent of the widget.
			-- `par' can be Void then the parent is the
			-- default_parent.
			-- (from EV_PRIMITIVE_IMP)

	wel_set_parent (a_parent: WEL_WINDOW)
			-- Change the parent of the current window.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	set_placement (a_placement: WEL_WINDOW_PLACEMENT)
			-- Set placement with `a_placement'
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			a_placement_not_void: a_placement /= Void

	set_text (a_text: STRING_GENERAL)
			-- Set the window text
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			text_set_when_not_void: a_text /= Void implies text.is_equal (a_text)
			text_set_when_void: a_text = Void implies text.count = 0

	set_timer (timer_id, time_out: INTEGER_32)
			-- Set a timer identified by `timer_id' with a
			-- `time_out' value (in milliseconds).
			-- See also on_timer, kill_timer.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			positive_timer_id: timer_id > 0
			positive_time_out: time_out > 0

	set_tooltip (a_tooltip: STRING_GENERAL)
			-- Assign `a_tooltip' to tooltip.
			-- (from EV_TOOLTIPABLE_IMP)
		require -- from EV_TOOLTIPABLE_I
			a_tooltip_not_void: a_tooltip /= Void

	set_top_level_window_imp (a_window: EV_WINDOW_IMP)
			-- Make `a_window' the new top_level_window_imp
			-- of `Current'.
			-- (from EV_PRIMITIVE_IMP)

	set_tree_item (an_item: WEL_TREE_VIEW_ITEM)
			-- Set some or all of a tree view item's attributes.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
			item_exists: an_item /= Void and then an_item.exists
			valid_item: has_item (an_item)
			has_items: total_count > 0

	set_x (a_x: INTEGER_32)
			-- Set `x' with `a_x'
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	set_y (a_y: INTEGER_32)
			-- Set `y' with `a_y'
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	unlock_window_update
			-- Unlock a locked window.	
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
	
feature -- Removal

	wel_destroy
			-- Destroy the window.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists
		ensure -- from WEL_WINDOW
			not_exists: not exists

	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 -- Resizing

	set_height (value: INTEGER_32)
			-- Make `value' the new height of `Current'.
			-- (from EV_SIZEABLE_IMP)
		require -- from WEL_WINDOW
			exists: exists

	set_minimum_height (value: INTEGER_32)
			-- Make `value' the new minimum_height of `Current'.
			-- There is no need to grow `Current' if its size is
			-- too small, the parent will do it if necessary.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_WIDGET_I
			a_minimum_height_positive: value >= 0
		ensure -- from EV_WIDGET_I
			minimum_height_assigned: is_usable implies interface.minimum_height = value

	set_minimum_size (mw, mh: INTEGER_32)
			-- Make `mw' the new minimum_width and `mh' the new
			-- minimum_height of `Current'.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_WIDGET_I
			a_minimum_width_positive: mw >= 0
			a_minimum_height_positive: mh >= 0
		ensure -- from EV_WIDGET_I
			minimum_width_assigned: is_usable implies interface.minimum_width = mw
			minimum_height_assigned: is_usable implies interface.minimum_height = mh

	set_minimum_width (value: INTEGER_32)
			-- Make `value' the new minimum_width of `Current'.
			-- There is no need to grow `Current' if its size is
			-- too small, the parent will do it if necessary.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_WIDGET_I
			a_minimum_width_positive: value >= 0
		ensure -- from EV_WIDGET_I
			minimum_width_assigned: is_usable implies interface.minimum_width = value

	set_size (w, h: INTEGER_32)
			-- Resize `Current'.
			-- (from EV_SIZEABLE_IMP)

	set_width (value: INTEGER_32)
			-- Make `value' the new width of `Current'.
			-- (from EV_SIZEABLE_IMP)
		require -- from WEL_WINDOW
			exists: exists
	
feature -- Conversion

	key_code_from_wel (a_wel_code: INTEGER_32): INTEGER_32
			-- Corresponding key code for ``a_wel_code''.
			-- (from EV_WEL_KEY_CONVERSION)
		require -- from EV_WEL_KEY_CONVERSION
			a_wel_code_valid: valid_wel_code (a_wel_code)

	key_code_to_wel (a_key_code: INTEGER_32): INTEGER_32
			-- Corresponding WEL code for ``a_key_code''.
			-- (from EV_WEL_KEY_CONVERSION)
		require -- from EV_WEL_KEY_CONVERSION
			a_key_code_valid: valid_key_code (a_key_code)
	
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

	arrow_action (direction: BOOLEAN)
			-- Go to the next widget that takes the focus throughthe arrow
			-- keys. If `direction' it goes to the next widget otherwise,
			-- it goes to the previous one.
			-- (from EV_PRIMITIVE_IMP)

	bring_to_top
			-- Bring this window to the top of the Z order.
			--
			-- Note:
			--  * If the window is a top-level window, it is activated.
			--  * If the window is a child window, the top-level parent window
			--    associated with the child window is activated.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	close_dockable_dialog (dockable_dialog: EV_DOCKABLE_DIALOG)
			-- Close request received by `dockable_dialog' so
			-- restore widget contained back to its original position
			-- in its old parent if possible.
			-- We must fire `dock_ended' actions.
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			dockable_dialog_destroyed: dockable_dialog.is_destroyed

	complete_dock
			-- Complete a dock from source_being_docked.
			-- (from EV_DOCKABLE_SOURCE_I)
		require -- from EV_DOCKABLE_SOURCE_I
			source_being_docked: source_being_docked /= Void
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_dock_executing: not is_dock_executing
			insert_separator_not_parented: insert_sep.parent = Void
			insert_label_not_parented: insert_label.parent = Void

	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_process_notification (notification_code: INTEGER_32)
			-- Process a `notification_code' which has not been
			-- processed by process_notification.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			exists: exists

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

	disable_horizontal_scroll_bar
			-- Disable the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	disable_vertical_scroll_bar
			-- Disable the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

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

	enable_horizontal_scroll_bar
			-- Enable the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	enable_vertical_scroll_bar
			-- Enable the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	ensure_item_visible (tree_node: EV_TREE_NODE)
			-- Ensure `tree_item' is visible in `Current'.
			-- Tree nodes may be expanded to achieve this.

	general_insert_item (item_imp: EV_TREE_NODE_IMP; par, after: POINTER; an_index: INTEGER_32)
			-- Add `item_imp' to the tree with `par' as parent.
			-- if `par' is the default_pointer, the parent is the tree.

	general_remove_item (item_imp: EV_TREE_NODE_IMP)
			-- Remove `item_imp' from `Current'.

	get_children (item_imp: EV_TREE_NODE_IMP): ARRAYED_LIST [EV_TREE_NODE_IMP]
			-- List of the direct children of `item_imp'.
			-- If the `item_imp' is Void, it returns the children of the tree.

	go_to_next_group_item (a_parent: WEL_COMPOSITE_WINDOW; after: BOOLEAN)
			-- Find the previous or following control with the
			-- Wm_tabstop style in the current group in `a_parent'
			-- depending on the value of `after'.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			valid_parent: a_parent /= Void and then a_parent.exists

	go_to_next_tab_item (a_parent: WEL_COMPOSITE_WINDOW; after: BOOLEAN)
			-- Find the previous or following control with the
			-- Wm_tabstop style in `a_parent depending on the
			-- value of `after'.
			-- (from WEL_CONTROL)
		require -- from WEL_CONTROL
			valid_parent: a_parent /= Void and then a_parent.exists

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

	hide_horizontal_scroll_bar
			-- Hide the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	hide_scroll_bars
			-- Hide the horizontal and vertical scroll bars.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	hide_vertical_scroll_bar
			-- Hide the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	insert_after (a_window: WEL_WINDOW)
			-- Insert the current window after `a_window'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			a_window_not_void: a_window /= Void
			a_window_not_current: a_window /= Current
			a_window_exists: a_window.exists

	internal_general_remove_item (item_imp: EV_TREE_NODE_IMP; depth: INTEGER_32)
			-- Remove `item_imp' from `Current'.
			-- This should only be called by `internal_remove_item'.
			-- We need to track `depth' so that we only assign `False'
			-- to removing_item when we return from the top level of the recursion.

	invalidate
			-- Invalide the entire client area of the window. The
			-- background will be erased before.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	invalidate_rect (rect: WEL_RECT; erase_background: BOOLEAN)
			-- Invalidate the area `rect' and erase
			-- the background if `erase_background' is True.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			rect_not_void: rect /= Void

	invalidate_region (region: WEL_REGION; erase_background: BOOLEAN)
			-- Invalidate the area `region' and erase
			-- the background if `erase_background' is True.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			region_not_void: region /= Void
			region_exists: region.exists

	invalidate_without_background
			-- Invalidate the entire client area of the window. The
			-- background will not be erased.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	kill_timer (timer_id: INTEGER_32)
			-- Kill the timer identified by `timer_id'.
			-- See also set_timer, on_timer.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			positive_timer_id: timer_id > 0

	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)

	wel_move (a_x, a_y: INTEGER_32)
			-- Move the window to `a_x', `a_y'.
			-- (from WEL_WINDOW)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	wel_move_and_resize (a_x, a_y, a_width, a_height: INTEGER_32; repaint: BOOLEAN)
			-- Move the window to `a_x', `a_y' position and
			-- resize it with `a_width', `a_height'.
			-- (from WEL_WINDOW)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	on_getdlgcode
			-- Called when window receives WM_GETDLGCODE message.
			-- (from EV_PRIMITIVE_IMP)
		require -- from  WEL_WINDOW
			True

	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

	process_tab_and_arrows_keys (virtual_key: INTEGER_32)
			-- Process a tab or arrow key press to give the focus to the next
			-- widget. Need to be called in the feature on_key_down when the
			-- control need to process this kind of keys.
			-- (from EV_PRIMITIVE_IMP)

	process_tab_key (virtual_key: INTEGER_32)
			-- Process a tab or arrow key press to give the focus to the next
			-- widget. Need to be called in the feature on_key_down when the
			-- control needs to process this kind of keys.
			-- (from EV_PRIMITIVE_IMP)

	put_command (a_command: WEL_COMMAND; message: INTEGER_32; argument: ANY)
			-- Put `a_command' associated to `message'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			a_command_not_void: a_command /= Void
			positive_message: message >= 0
		ensure -- from WEL_WINDOW
			command_added: command (message) = a_command and command_argument (message) = argument

	remove_command (message: INTEGER_32)
			-- Remove the command associated to `message'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			positive_message: message >= 0
			command_exists: command_exists (message)
		ensure -- from WEL_WINDOW
			command_removed: not command_exists (message)

	wel_resize (a_width, a_height: INTEGER_32)
			-- Resize the window with `a_width', `a_height'.
			-- (from WEL_WINDOW)
		require -- from  EV_SIZEABLE_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	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

	scroll (a_x, a_y: INTEGER_32)
			-- Scroll the contents of the window's client area.
			-- `a_x' and `a_y' specify the amount of horizontal
			-- and vertical scrolling.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	set_class_icon (new_icon: WEL_ICON)
			-- Replace the current icon for the class which this window
			-- belongs to.
			--
			-- The SetClassLong function replaces the specified 32-bit (long)
			-- value at the specified offset into the extra class memory
			-- or the WNDCLASSEX structure for the class to which the
			-- specified window belongs.
			-- (from WEL_WINDOW)

	set_class_small_icon (new_icon: WEL_ICON)
			-- Replace the current icon for the class which this window
			-- belongs to.
			--
			-- The SetClassLong function replaces the specified 32-bit (long)
			-- value at the specified offset into the extra class memory
			-- or the WNDCLASSEX structure for the class to which the
			-- specified window belongs.
			-- (from WEL_WINDOW)

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

	set_z_order (z_order: POINTER)
			-- Set the z-order of the window.
			-- See class WEL_HWND_CONSTANTS for `z_order' values.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			valid_hwnd_constant: valid_hwnd_constant (z_order)

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

	show_horizontal_scroll_bar
			-- Show the horizontal scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	show_scroll_bars
			-- Show the horizontal and vertical scroll bars.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	show_vertical_scroll_bar
			-- Show the vertical scroll bar.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	show_with_option (cmd_show: INTEGER_32)
			-- Set the window's visibility with `cmd_show'.
			-- See class WEL_SW_CONSTANTS for `cmd_show' value.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			parent_shown: wel_parent /= Void implies wel_parent.exists and wel_parent.shown

	tab_action (direction: BOOLEAN)
			-- Go to the next widget that takes the focus through to the tab
			-- key. If `direction' it goes to the next widget otherwise,
			-- it goes to the previous one.
			-- (from EV_PRIMITIVE_IMP)

	tooltip_window: WEL_WINDOW
			-- `Result' is WEL_WINDOW of `Current' used
			-- to trigger tooltip events. May be redefined in
			-- descendents that are composed of more than one window
			-- such as combo boxes.
			-- (from EV_PRIMITIVE_IMP)

	update
			-- Update the client area by sending a Wm_paint message.
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
		require -- from WEL_WINDOW
			exists: exists

	validate
			-- Validate the entire client area of the window.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists

	validate_rect (rect: WEL_RECT)
			-- Validate the area `rect'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			rect_not_void: rect /= Void

	validate_region (region: WEL_REGION)
			-- Validate the area `region'.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			region_not_void: region /= Void
			region_exists: region.exists

	win_help (help_file: STRING_GENERAL; a_command, data: INTEGER_32)
			-- Start the Windows Help program with `help_file'.
			-- `a_command' specifies the type of help requested. See
			-- class WEL_HELP_CONSTANTS for `a_command' values.
			-- 'data' is depandant on 'a_command'.  Check MSDN for more details.
			-- (from WEL_WINDOW)
		require -- from WEL_WINDOW
			exists: exists
			help_file_not_void: help_file /= Void
	
feature -- Obsolete

	nc_minheight: INTEGER_32 is 2
			-- Used only in the `notify_change' feature to
			-- notify the parent that the minimum height of
			-- `Current' has changed.
			-- (from EV_SIZEABLE_IMP)

	nc_minsize: INTEGER_32 is 3
			-- Used only in the `notify_change' feature to
			-- notify the parent that both the minimum width
			-- and height of `Current' widget have changed.
			-- (from EV_SIZEABLE_IMP)

	nc_minwidth: INTEGER_32 is 1
			-- Used only in the `notify_change' feature to
			-- notify the parent that the minimum width of
			-- `Current' has changed.
			-- (from EV_SIZEABLE_IMP)
	
feature -- Inapplicable

	drag_cursor: EV_POINTER_STYLE
			-- Cursor used when `Current' is being transported.
			-- (from EV_DOCKABLE_SOURCE_I)
	
feature -- Implementation

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

	internal_disable_dockable
			-- Enable or disable dockable.
			-- This has no implementation on Windows, as we do not need it.
			-- On Gtk, this is necessary, so that the necessary signal
			-- connections may be performed.
			-- Was declared in EV_DOCKABLE_SOURCE_IMP as synonym of internal_enable_dockable.
			-- (from EV_DOCKABLE_SOURCE_IMP)
		require -- from  EV_DOCKABLE_SOURCE_I
			True

	internal_enable_dockable
			-- Enable or disable dockable.
			-- This has no implementation on Windows, as we do not need it.
			-- On Gtk, this is necessary, so that the necessary signal
			-- connections may be performed.
			-- Was declared in EV_DOCKABLE_SOURCE_IMP as synonym of internal_disable_dockable.
			-- (from EV_DOCKABLE_SOURCE_IMP)
		require -- from  EV_DOCKABLE_SOURCE_I
			True

	pnd_press (a_x, a_y, a_button, a_screen_x, a_screen_y: INTEGER_32)
			-- (from EV_PICK_AND_DROPABLE_ITEM_HOLDER_IMP)
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
	
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 -- Basic Operations

	refresh_now
			-- Refresh now.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
	
feature -- Basic operation

	internal_set_minimum_height (value: INTEGER_32)
			-- Make `value' the new minimum_height of `Current'.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_value: value >= 0

	internal_set_minimum_size (mw, mh: INTEGER_32)
			-- Make `mw' the new minimum_width and `mh' the new
			-- minimum_height of `Current'.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_mw: mw >= 0
			positive_mh: mh >= 0

	internal_set_minimum_width (value: INTEGER_32)
			-- Make `value' the new minimum_width of `Current'.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_value: value >= 0

	internal_set_size (mw, mh: INTEGER_32)
			-- Set `size' of child_cell.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			positive_mw: mw >= 0
			positive_mh: mh >= 0

	parent_ask_resize (a_width, a_height: INTEGER_32)
			-- Called by the parent when the size of `Current' has to be
			-- changed to `a_width', `a_height'.
			-- (from EV_SIZEABLE_IMP)

	set_move_and_size (a_x_position, a_y_position, a_width, a_height: INTEGER_32)
			-- Move and resize the widget. Only the parent can call this feature
			-- because it doesn't notify the parent of the change.
			-- Equivalent of parent_ask_resize with move.
			-- (from EV_SIZEABLE_IMP)
	
feature -- Constants

	key_0: INTEGER_32 is 1
			-- (from EV_KEY_CONSTANTS)

	key_1: INTEGER_32 is 2
			-- (from EV_KEY_CONSTANTS)

	key_2: INTEGER_32 is 3
			-- (from EV_KEY_CONSTANTS)

	key_3: INTEGER_32 is 4
			-- (from EV_KEY_CONSTANTS)

	key_4: INTEGER_32 is 5
			-- (from EV_KEY_CONSTANTS)

	key_5: INTEGER_32 is 6
			-- (from EV_KEY_CONSTANTS)

	key_6: INTEGER_32 is 7
			-- (from EV_KEY_CONSTANTS)

	key_7: INTEGER_32 is 8
			-- (from EV_KEY_CONSTANTS)

	key_8: INTEGER_32 is 9
			-- (from EV_KEY_CONSTANTS)

	key_9: INTEGER_32 is 10
			-- (from EV_KEY_CONSTANTS)

	key_a: INTEGER_32 is 68
			-- (from EV_KEY_CONSTANTS)

	key_alt: INTEGER_32 is 96
			-- (from EV_KEY_CONSTANTS)

	key_b: INTEGER_32 is 69
			-- (from EV_KEY_CONSTANTS)

	key_back_space: INTEGER_32 is 40
			-- (from EV_KEY_CONSTANTS)

	key_backquote: INTEGER_32 is 56
			-- (from EV_KEY_CONSTANTS)

	key_backslash: INTEGER_32 is 54
			-- (from EV_KEY_CONSTANTS)

	key_c: INTEGER_32 is 70
			-- (from EV_KEY_CONSTANTS)

	key_caps_lock: INTEGER_32 is 45
			-- (from EV_KEY_CONSTANTS)

	key_close_bracket: INTEGER_32 is 52
			-- (from EV_KEY_CONSTANTS)

	key_comma: INTEGER_32 is 47
			-- (from EV_KEY_CONSTANTS)

	key_ctrl: INTEGER_32 is 95
			-- (from EV_KEY_CONSTANTS)

	key_d: INTEGER_32 is 71
			-- (from EV_KEY_CONSTANTS)

	key_dash: INTEGER_32 is 57
			-- (from EV_KEY_CONSTANTS)

	key_delete: INTEGER_32 is 67
			-- (from EV_KEY_CONSTANTS)

	key_down_arrow: INTEGER_32 is 59
			-- (from EV_KEY_CONSTANTS)

	key_e: INTEGER_32 is 72
			-- (from EV_KEY_CONSTANTS)

	key_end: INTEGER_32 is 65
			-- (from EV_KEY_CONSTANTS)

	key_enter: INTEGER_32 is 41
			-- (from EV_KEY_CONSTANTS)

	key_equal: INTEGER_32 is 48
			-- (from EV_KEY_CONSTANTS)

	key_escape: INTEGER_32 is 42
			-- (from EV_KEY_CONSTANTS)

	key_f: INTEGER_32 is 73
			-- (from EV_KEY_CONSTANTS)

	key_f1: INTEGER_32 is 27
			-- (from EV_KEY_CONSTANTS)

	key_f10: INTEGER_32 is 36
			-- (from EV_KEY_CONSTANTS)

	key_f11: INTEGER_32 is 37
			-- (from EV_KEY_CONSTANTS)

	key_f12: INTEGER_32 is 38
			-- (from EV_KEY_CONSTANTS)

	key_f2: INTEGER_32 is 28
			-- (from EV_KEY_CONSTANTS)

	key_f3: INTEGER_32 is 29
			-- (from EV_KEY_CONSTANTS)

	key_f4: INTEGER_32 is 30
			-- (from EV_KEY_CONSTANTS)

	key_f5: INTEGER_32 is 31
			-- (from EV_KEY_CONSTANTS)

	key_f6: INTEGER_32 is 32
			-- (from EV_KEY_CONSTANTS)

	key_f7: INTEGER_32 is 33
			-- (from EV_KEY_CONSTANTS)

	key_f8: INTEGER_32 is 34
			-- (from EV_KEY_CONSTANTS)

	key_f9: INTEGER_32 is 35
			-- (from EV_KEY_CONSTANTS)

	key_g: INTEGER_32 is 74
			-- (from EV_KEY_CONSTANTS)

	key_h: INTEGER_32 is 75
			-- (from EV_KEY_CONSTANTS)

	key_home: INTEGER_32 is 64
			-- (from EV_KEY_CONSTANTS)

	key_i: INTEGER_32 is 76
			-- (from EV_KEY_CONSTANTS)

	key_insert: INTEGER_32 is 66
			-- (from EV_KEY_CONSTANTS)

	key_j: INTEGER_32 is 77
			-- (from EV_KEY_CONSTANTS)

	key_k: INTEGER_32 is 78
			-- (from EV_KEY_CONSTANTS)

	key_l: INTEGER_32 is 79
			-- (from EV_KEY_CONSTANTS)

	key_left: INTEGER_32 is 60
			-- (from EV_KEY_CONSTANTS)

	key_left_meta: INTEGER_32 is 97
			-- (from EV_KEY_CONSTANTS)

	key_m: INTEGER_32 is 80
			-- (from EV_KEY_CONSTANTS)

	key_menu: INTEGER_32 is 99
			-- (from EV_KEY_CONSTANTS)

	key_n: INTEGER_32 is 81
			-- (from EV_KEY_CONSTANTS)

	key_num_lock: INTEGER_32 is 24
			-- (from EV_KEY_CONSTANTS)

	key_numpad_0: INTEGER_32 is 11
			-- (from EV_KEY_CONSTANTS)

	key_numpad_1: INTEGER_32 is 12
			-- (from EV_KEY_CONSTANTS)

	key_numpad_2: INTEGER_32 is 13
			-- (from EV_KEY_CONSTANTS)

	key_numpad_3: INTEGER_32 is 14
			-- (from EV_KEY_CONSTANTS)

	key_numpad_4: INTEGER_32 is 15
			-- (from EV_KEY_CONSTANTS)

	key_numpad_5: INTEGER_32 is 16
			-- (from EV_KEY_CONSTANTS)

	key_numpad_6: INTEGER_32 is 17
			-- (from EV_KEY_CONSTANTS)

	key_numpad_7: INTEGER_32 is 18
			-- (from EV_KEY_CONSTANTS)

	key_numpad_8: INTEGER_32 is 19
			-- (from EV_KEY_CONSTANTS)

	key_numpad_9: INTEGER_32 is 20
			-- (from EV_KEY_CONSTANTS)

	key_numpad_add: INTEGER_32 is 21
			-- (from EV_KEY_CONSTANTS)

	key_numpad_decimal: INTEGER_32 is 26
			-- (from EV_KEY_CONSTANTS)

	key_numpad_divide: INTEGER_32 is 22
			-- (from EV_KEY_CONSTANTS)

	key_numpad_multiply: INTEGER_32 is 23
			-- (from EV_KEY_CONSTANTS)

	key_numpad_subtract: INTEGER_32 is 25
			-- (from EV_KEY_CONSTANTS)

	key_o: INTEGER_32 is 82
			-- (from EV_KEY_CONSTANTS)

	key_open_bracket: INTEGER_32 is 51
			-- (from EV_KEY_CONSTANTS)

	key_p: INTEGER_32 is 83
			-- (from EV_KEY_CONSTANTS)

	key_page_down: INTEGER_32 is 63
			-- (from EV_KEY_CONSTANTS)

	key_page_up: INTEGER_32 is 62
			-- (from EV_KEY_CONSTANTS)

	key_pause: INTEGER_32 is 44
			-- (from EV_KEY_CONSTANTS)

	key_period: INTEGER_32 is 49
			-- (from EV_KEY_CONSTANTS)

	key_q: INTEGER_32 is 84
			-- (from EV_KEY_CONSTANTS)

	key_quote: INTEGER_32 is 55
			-- (from EV_KEY_CONSTANTS)

	key_r: INTEGER_32 is 85
			-- (from EV_KEY_CONSTANTS)

	key_right: INTEGER_32 is 61
			-- (from EV_KEY_CONSTANTS)

	key_right_meta: INTEGER_32 is 98
			-- (from EV_KEY_CONSTANTS)

	key_s: INTEGER_32 is 86
			-- (from EV_KEY_CONSTANTS)

	key_scroll_lock: INTEGER_32 is 46
			-- (from EV_KEY_CONSTANTS)

	key_semicolon: INTEGER_32 is 50
			-- (from EV_KEY_CONSTANTS)

	key_shift: INTEGER_32 is 94
			-- (from EV_KEY_CONSTANTS)

	key_slash: INTEGER_32 is 53
			-- (from EV_KEY_CONSTANTS)

	key_space: INTEGER_32 is 39
			-- (from EV_KEY_CONSTANTS)

	key_t: INTEGER_32 is 87
			-- (from EV_KEY_CONSTANTS)

	key_tab: INTEGER_32 is 43
			-- (from EV_KEY_CONSTANTS)

	key_u: INTEGER_32 is 88
			-- (from EV_KEY_CONSTANTS)

	key_up_arrow: INTEGER_32 is 58
			-- (from EV_KEY_CONSTANTS)

	key_v: INTEGER_32 is 89
			-- (from EV_KEY_CONSTANTS)

	key_w: INTEGER_32 is 90
			-- (from EV_KEY_CONSTANTS)

	key_x: INTEGER_32 is 91
			-- (from EV_KEY_CONSTANTS)

	key_y: INTEGER_32 is 92
			-- (from EV_KEY_CONSTANTS)

	key_z: INTEGER_32 is 93
			-- (from EV_KEY_CONSTANTS)
	
feature -- Contract support

	valid_key_code (a_code: INTEGER_32): BOOLEAN
			-- Is ``a_code'' a valid key code?
			-- (from EV_KEY_CONSTANTS)

	valid_wel_code (a_wel_code: INTEGER_32): BOOLEAN
			-- Is ``a_wel_code'' valid?
			-- (from EV_WEL_KEY_CONVERSION)
	
feature -- Deferred features

	has_tabstop: BOOLEAN
			-- Does `Current' exhibit all attributes to permit it to receive the
			-- focus while tabbing?
			-- (from EV_WIDGET_IMP)

	next_dlggroupitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- Encapsulation of the SDK GetNextDlgGroupItem,
			-- because we cannot do a deferred feature become an
			-- external feature.
			-- (from EV_WIDGET_IMP)

	next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- Encapsulation of the SDK GetNextDlgTabItem,
			-- because we cannot do a deferred feature become an
			-- external feature.
			-- (from EV_WIDGET_IMP)

	next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
			-- Return the next widget that may by tabbed to as a result of pressing the tab key from `start_widget'.
			-- `search_pos' is the index where searching must start from for containers, and `forwards' determines the
			-- tabbing direction. If `search_pos' is less then 1 or more than count for containers, the parent of the
			-- container must be searched next.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			start_widget_not_void: start_widget /= Void
		ensure -- from EV_WIDGET_IMP
			result_not_void: Result /= Void

	next_tabstop_widget_from_parent (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
			-- Return the next widget that may be tabbed to as a result of pressing the tab key from `start_widget'
			-- by visiting the parent of `Current' with a search index determined by `search_pos' and `forwards'.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			start_widget_not_void: start_widget /= Void
		ensure -- from EV_WIDGET_IMP
			result_not_void: Result /= Void

	on_size (size_type, a_width, a_height: INTEGER_32)
			-- `Current' has been resized.
			-- (from EV_WIDGET_IMP)
		require -- from WEL_WINDOW
			exists: exists

	return_current_if_next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): EV_WIDGET_IMP
			-- If `Current' is not equal to `start_widget' then return `Current' but only if `search_pos' is 1 and `forwards' or
			-- `search_pos' is 0 and not `forwards. This ensures that we return a container in the correct order (before or after)
			-- its children dependent on the state of `forwards'.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			start_widget_not_void: start_widget /= Void

	start_widget_searched_cell: CELL [INTEGER_32]
			-- A cell to hold the seach index that the item tabbed from started with.
			-- This is necessary to prevent infinite recursion in the
			-- case where there is no next item as if we return to the
			-- original widget with the same search position, then we know we have exhausted all other possibilities.
			-- (from EV_WIDGET_IMP)

	wel_background_color: WEL_COLOR_REF
			-- `Result' is background color of `Current'.
			-- (from EV_WIDGET_IMP)

	wel_foreground_color: WEL_COLOR_REF
			-- `Result' is foreground color of `Current'.
			-- (from EV_WIDGET_IMP)
	
feature -- Element Change

	set_default_processing (value: BOOLEAN)
			-- Enable or disable default processing of window messages.
			-- (from WEL_RETURN_VALUE)
		ensure -- from WEL_RETURN_VALUE
			value_set: default_processing = value

	set_message_return_value (value: POINTER)
			-- Set the window-procedure-return-value.
			-- (from WEL_RETURN_VALUE)
		require -- from  EV_WIDGET_IMP
			True
		ensure -- from WEL_RETURN_VALUE
			has_return_value: has_return_value
			value_set: message_return_value = value
	
feature -- Event handling

	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_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_ACTION_SEQUENCES_IMP)
		require -- from  EV_TREE_ACTION_SEQUENCES_I
			True

	create_focus_in_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a focus_in action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_focus_out_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a focus_out action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_key_press_actions: EV_KEY_ACTION_SEQUENCE
			-- Create a key_press action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_key_press_string_actions: EV_KEY_STRING_ACTION_SEQUENCE
			-- Create a key_press_string action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_key_release_actions: EV_KEY_ACTION_SEQUENCE
			-- Create a key_release action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_mouse_wheel_actions: EV_INTEGER_ACTION_SEQUENCE
			-- Create a mouse_wheel action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_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_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_pointer_button_release_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
			-- Create a pointer_button_release action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_pointer_double_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
			-- Create a pointer_double_press action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_pointer_enter_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a pointer_enter action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a pointer_leave action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
			-- Create a pointer_motion action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_resize_actions: EV_GEOMETRY_ACTION_SEQUENCE
			-- Create a resize action sequence.
			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	create_select_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a select action sequence.
			-- (from EV_TREE_ACTION_SEQUENCES_IMP)
		require -- from  EV_TREE_ACTION_SEQUENCES_I
			True

	deselect_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when a tree item is deselected.
			-- (from EV_TREE_ACTION_SEQUENCES_I)
		ensure -- from EV_TREE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	dock_ended_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed after a dock completes from `Current'.
			-- Either to a dockable target or a dockable dialog.
			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I
			not_void: Result /= Void

	dock_started_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when pebble is picked up.
			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
		ensure -- from EV_DOCKABLE_SOURCE_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

	file_drop_actions: ACTION_SEQUENCE [TUPLE [LIST [STRING_32]]]
			-- Actions to be performed when an OS file drop occurs on `Current'.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	focus_in_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when keyboard focus is gained.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	focus_out_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when keyboard focus is lost.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	key_press_actions: EV_KEY_ACTION_SEQUENCE
			-- Actions to be performed when a keyboard key is pressed.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	key_press_string_actions: EV_KEY_STRING_ACTION_SEQUENCE
			-- Actions to be performed when a keyboard press generates a displayable character.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	key_release_actions: EV_KEY_ACTION_SEQUENCE
			-- Actions to be performed when a keyboard key is released.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	mouse_wheel_actions: EV_INTEGER_ACTION_SEQUENCE
			-- Actions to be performed when mouse wheel is rotated.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_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_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_button_release_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer button is released.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_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_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_enter_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer enters widget.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer leaves widget.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_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_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_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)

	resize_actions: EV_GEOMETRY_ACTION_SEQUENCE
			-- Actions to be performed when size changes.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_ACTION_SEQUENCES_I
			not_void: Result /= Void

	select_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when a tree item is selected.
			-- (from EV_TREE_ACTION_SEQUENCES_I)
		ensure -- from EV_TREE_ACTION_SEQUENCES_I
			not_void: Result /= Void
	
feature -- Externals

	cwin_get_next_dlggroupitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- SDK GetNextDlgGroupItem
			-- (from WEL_CONTROL)
		require -- from  EV_WIDGET_IMP
			True

	cwin_get_next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- SDK GetNextDlgGroupItem
			-- (from WEL_CONTROL)
		require -- from  EV_WIDGET_IMP
			True

	cwin_show_window (hwnd: POINTER; cmd_show: INTEGER_32)
			-- SDK ShowWindow
			-- (from WEL_WINDOW)
		require -- from  EV_WIDGET_IMP
			True
	
feature -- Feature that should be directly implemented by externals

	show_window (hwnd: POINTER; cmd_show: INTEGER_32)
			-- Encapsulation of the cwin_show_window function of
			-- WEL_WINDOW. Normaly, we should be able to have directly
			-- cwin_show_window deferred but it does not wotk because
			-- it would be implemented by an external.
			-- (from EV_WIDGET_IMP)
	
feature -- Notifications

	on_tvn_begindrag (info: WEL_NM_TREE_VIEW)
			-- A drag-and-drop operation involving the left mouse
			-- button is being initiated.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_beginlabeledit (info: WEL_TREE_VIEW_ITEM)
			-- A label editing for an item has started.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_beginrdrag (info: WEL_NM_TREE_VIEW)
			-- A drag-and-drop operation involving the right mouse
			-- button is being initiated.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_deleteitem (info: WEL_NM_TREE_VIEW)
			-- An item has been deleted.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_endlabeledit (info: WEL_TREE_VIEW_ITEM)
			-- A label editing for an item has ended.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_getdispinfo (info: WEL_TREE_VIEW_ITEM)
			-- The parent window must provide information needed
			-- to display or sort an item.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_itemexpanding (info: WEL_NM_TREE_VIEW)
			-- a parent item's list of child items is about to
			-- expand or collapse.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_keydown (virtual_key: INTEGER_32)
			-- The user pressed a key and the tree-view control
			-- has the input focus.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists

	on_tvn_setdispinfo (info: WEL_TREE_VIEW_ITEM)
			-- The parent window must update the informations
			-- it maintains about an item.
			-- (from WEL_TREE_VIEW)
		require -- from WEL_TREE_VIEW
			exists: exists
	
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 -- Position

	set_position (new_x_position: INTEGER_32; new_y_position: INTEGER_32)
			-- Put at horizontal position `new_x_position' and at
			-- vertical position `new_y_position' relative to parent.
			-- (from EV_SIZEABLE_IMP)
	
feature -- Registration

	is_registered: BOOLEAN
			-- Is `window' registered?
			-- (from WEL_WINDOW)

	frozen register_current_window
			-- Register `Current' in window manager.
			-- (from WEL_WINDOW)
		ensure -- from WEL_WINDOW
			registered: is_registered
	
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_WIDGET_I
	is_displayed_implies_show_requested: is_usable and is_displayed implies is_show_requested

		-- 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_DOCKABLE_SOURCE_I
	widget_or_item_source: not (widget_source_being_docked /= Void and item_source_being_docked /= Void)
	dock_executing: is_dock_executing implies widget_source_being_docked /= Void or item_source_being_docked /= Void

		-- from EV_POSITIONED_I
	minimum_width_positive_or_zero: is_usable implies minimum_width >= 0
	minimum_height_positive_or_zero: is_usable implies minimum_height >= 0

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

		-- 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_IMP