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note
	description: "Eiffel Vision container. Mswindow implementation."
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2016-09-27 07:50:48 -0800 (Tue, 27 Sep 2016) $"
	revision: "$Revision: 99192 $"

deferred class interface
	EV_CONTAINER_IMP

feature -- Access

	accept_cursor: detachable 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: detachable FUNCTION [INTEGER_32, INTEGER_32, detachable 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)

	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)

	frozen background_color: EV_COLOR
			-- Color displayed behind foreground features.
			-- (from EV_COLORIZABLE_I)

	background_color_internal: detachable EV_COLOR
			-- Color used for the background of Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	background_pixmap: detachable EV_PIXMAP
			-- Result is pixmap used for background.

	background_pixmap_imp: detachable EV_PIXMAP_IMP
			-- Pixmap used for the background of the widget

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

	client_height: INTEGER_32
			-- Height of the client area of container
			-- Result in pixels.
		ensure -- from EV_CONTAINER_I
			positive: Result >= 0

	client_width: INTEGER_32
			-- Width of the client area of container.
			-- Result in pixels.
		ensure -- from EV_CONTAINER_I
			positive: Result >= 0

	client_x: INTEGER_32
			-- Left of the client area.
			-- Result in pixels.

	client_y: INTEGER_32
			-- Top of the client area.
			-- Result in pixels.

	configurable_target_menu_handler: detachable PROCEDURE [EV_MENU, ARRAYED_LIST [EV_PND_TARGET_DATA], EV_PICK_AND_DROPABLE, detachable ANY]
			-- (from EV_PICK_AND_DROPABLE_I)

	count: INTEGER_32
			-- Number of elements in Current.
			-- (from EV_CONTAINER_I)
		require -- from EV_CONTAINER_I
			not_destroyed: not is_destroyed

	Cursor_on_widget: CELL [detachable 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: detachable PREDICATE [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 occurring.
			-- (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

	deny_cursor: detachable 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 = 3
			-- Pointer movement in pixels required to start a drag and drop.
			-- (from EV_SHARED_TRANSPORT_IMP)

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

	frozen foreground_color: EV_COLOR
			-- Color of foreground features like text.
			-- (from EV_COLORIZABLE_I)

	foreground_color_internal: detachable EV_COLOR
			-- Color used for the foreground of Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_COLORIZABLE_I
			True

	generating_type: TYPE [detachable EV_CONTAINER_IMP]
			-- Type of current object
			-- (type of which it is a direct instance)
			-- (from ANY)
		ensure -- from ANY
			generating_type_not_void: Result /= Void

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)
		ensure -- from ANY
			generator_not_void: Result /= Void
			generator_not_empty: not Result.is_empty

	Gwl_exstyle: INTEGER_32 = -20
			-- (from WEL_GWL_CONSTANTS)

	Gwl_style: INTEGER_32 = -16
			-- (from WEL_GWL_CONSTANTS)

	has (v: like item): BOOLEAN
			-- Does structure include v?
			-- (from EV_CONTAINER_I)

	height: INTEGER_32
			-- Height of Current.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	help_context: detachable FUNCTION [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

	frozen hwnd_bottom: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_broadcast: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_message: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_notopmost: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_top: POINTER
			-- (from WEL_HWND_CONSTANTS)

	frozen hwnd_topmost: POINTER
			-- (from WEL_HWND_CONSTANTS)

	interface_item: EV_WIDGET
			-- Current item but guaranteed attached for calling from interface only
			-- (from EV_CONTAINER_I)

	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: detachable EV_WIDGET
			-- Current item.
			-- (from EV_CONTAINER_I)

	key_code_from_key_string (key_string: READABLE_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)

	Mb_abortretryignore: INTEGER_32 = 2
			-- (from WEL_MB_CONSTANTS)

	Mb_applmodal: INTEGER_32 = 0
			-- (from WEL_MB_CONSTANTS)

	Mb_default_desktop_only: INTEGER_32 = 131072
			-- (from WEL_MB_CONSTANTS)

	Mb_defbutton1: INTEGER_32 = 0
			-- (from WEL_MB_CONSTANTS)

	Mb_defbutton2: INTEGER_32 = 256
			-- (from WEL_MB_CONSTANTS)

	Mb_defbutton3: INTEGER_32 = 512
			-- (from WEL_MB_CONSTANTS)

	Mb_defmask: INTEGER_32 = 3840
			-- (from WEL_MB_CONSTANTS)

	Mb_help: INTEGER_32 = 16384
			-- (from WEL_MB_CONSTANTS)

	Mb_iconasterisk: INTEGER_32 = 64
			-- (from WEL_MB_CONSTANTS)

	Mb_iconerror: INTEGER_32 = 16
			-- Same as `mb_iconhand`.
			-- (from WEL_MB_CONSTANTS)

	Mb_iconexclamation: INTEGER_32 = 48
			-- (from WEL_MB_CONSTANTS)

	Mb_iconhand: INTEGER_32 = 16
			-- (from WEL_MB_CONSTANTS)

	Mb_iconinformation: INTEGER_32 = 64
			-- Same as `mb_iconasterisk`.
			-- (from WEL_MB_CONSTANTS)

	Mb_iconmask: INTEGER_32 = 240
			-- (from WEL_MB_CONSTANTS)

	Mb_iconquestion: INTEGER_32 = 32
			-- (from WEL_MB_CONSTANTS)

	Mb_iconstop: INTEGER_32 = 16
			-- Same as `mb_iconhand`.
			-- (from WEL_MB_CONSTANTS)

	Mb_iconwarning: INTEGER_32 = 48
			-- Same as `mb_iconexclamation`.
			-- (from WEL_MB_CONSTANTS)

	Mb_nofocus: INTEGER_32 = 32768
			-- (from WEL_MB_CONSTANTS)

	Mb_ok: INTEGER_32 = 0
			-- (from WEL_MB_CONSTANTS)

	Mb_okcancel: INTEGER_32 = 1
			-- (from WEL_MB_CONSTANTS)

	Mb_retrycancel: INTEGER_32 = 5
			-- (from WEL_MB_CONSTANTS)

	Mb_right: INTEGER_32 = 524288
			-- (from WEL_MB_CONSTANTS)

	Mb_rtlreading: INTEGER_32 = 1048576
			-- (from WEL_MB_CONSTANTS)

	Mb_setforeground: INTEGER_32 = 65536
			-- (from WEL_MB_CONSTANTS)

	Mb_systemmodal: INTEGER_32 = 4096
			-- (from WEL_MB_CONSTANTS)

	Mb_taskmodal: INTEGER_32 = 8192
			-- (from WEL_MB_CONSTANTS)

	Mb_topmost: INTEGER_32 = 262144
			-- (from WEL_MB_CONSTANTS)

	Mb_typemask: INTEGER_32 = 15
			-- (from WEL_MB_CONSTANTS)

	Mb_usericon: INTEGER_32 = 128
			-- (from WEL_MB_CONSTANTS)

	Mb_yesno: INTEGER_32 = 4
			-- (from WEL_MB_CONSTANTS)

	Mb_yesnocancel: INTEGER_32 = 3
			-- (from WEL_MB_CONSTANTS)

	merged_radio_button_groups: detachable ARRAYED_LIST [EV_CONTAINER]
			-- Result is all other radio button groups
			-- merged with Current.
			-- (from EV_CONTAINER_I)
		ensure -- from EV_CONTAINER_I
			current_not_included: Result /= Void implies not Result.has (attached_interface)

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

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

	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: detachable EV_CONTAINER
			-- Parent of Current
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

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

	pebble_function: detachable FUNCTION [detachable 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)

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

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

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

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

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

	top_level_window: detachable EV_WINDOW
			-- Top level window that contains Current.
			-- (from EV_WIDGET_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 = 48
			-- (from WEL_VK_CONSTANTS)

	Vk_1: INTEGER_32 = 49
			-- (from WEL_VK_CONSTANTS)

	Vk_2: INTEGER_32 = 50
			-- (from WEL_VK_CONSTANTS)

	Vk_3: INTEGER_32 = 51
			-- (from WEL_VK_CONSTANTS)

	Vk_4: INTEGER_32 = 52
			-- (from WEL_VK_CONSTANTS)

	Vk_5: INTEGER_32 = 53
			-- (from WEL_VK_CONSTANTS)

	Vk_6: INTEGER_32 = 54
			-- (from WEL_VK_CONSTANTS)

	Vk_7: INTEGER_32 = 55
			-- (from WEL_VK_CONSTANTS)

	Vk_8: INTEGER_32 = 56
			-- (from WEL_VK_CONSTANTS)

	Vk_9: INTEGER_32 = 57
			-- Vk_a thru Vk_z are the same as their ASCII equivalents: 'A' thru 'Z'.
			-- (from WEL_VK_CONSTANTS)

	Vk_a: INTEGER_32 = 65
			-- (from WEL_VK_CONSTANTS)

	Vk_add: INTEGER_32 = 107
			-- Declared in Windows as VK_ADD
			-- (from WEL_VK_CONSTANTS)

	Vk_alt: INTEGER_32 = 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 = 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 = 66
			-- (from WEL_VK_CONSTANTS)

	Vk_back: INTEGER_32 = 8
			-- Declared in Windows as VK_BACK
			-- (from WEL_VK_CONSTANTS)

	Vk_c: INTEGER_32 = 67
			-- (from WEL_VK_CONSTANTS)

	Vk_cancel: INTEGER_32 = 3
			-- Declared in Windows as VK_CANCEL
			-- (from WEL_VK_CONSTANTS)

	Vk_capital: INTEGER_32 = 20
			-- Declared in Windows as VK_CAPITAL
			-- (from WEL_VK_CONSTANTS)

	Vk_clear: INTEGER_32 = 12
			-- Declared in Windows as VK_CLEAR
			-- (from WEL_VK_CONSTANTS)

	Vk_control: INTEGER_32 = 17
			-- Declared in Windows as VK_CONTROL
			-- (from WEL_VK_CONSTANTS)

	Vk_d: INTEGER_32 = 68
			-- (from WEL_VK_CONSTANTS)

	Vk_decimal: INTEGER_32 = 110
			-- Declared in Windows as VK_DECIMAL
			-- (from WEL_VK_CONSTANTS)

	Vk_delete: INTEGER_32 = 46
			-- Declared in Windows as VK_DELETE
			-- (from WEL_VK_CONSTANTS)

	Vk_divide: INTEGER_32 = 111
			-- Declared in Windows as VK_DIVIDE
			-- (from WEL_VK_CONSTANTS)

	Vk_down: INTEGER_32 = 40
			-- Declared in Windows as VK_DOWN
			-- (from WEL_VK_CONSTANTS)

	Vk_e: INTEGER_32 = 69
			-- (from WEL_VK_CONSTANTS)

	Vk_end: INTEGER_32 = 35
			-- Declared in Windows as VK_END
			-- (from WEL_VK_CONSTANTS)

	Vk_escape: INTEGER_32 = 27
			-- Declared in Windows as VK_ESCAPE
			-- (from WEL_VK_CONSTANTS)

	Vk_execute: INTEGER_32 = 43
			-- Declared in Windows as VK_EXECUTE
			-- (from WEL_VK_CONSTANTS)

	Vk_f: INTEGER_32 = 70
			-- (from WEL_VK_CONSTANTS)

	Vk_f1: INTEGER_32 = 112
			-- Declared in Windows as VK_F1
			-- (from WEL_VK_CONSTANTS)

	Vk_f10: INTEGER_32 = 121
			-- Declared in Windows as VK_F10
			-- (from WEL_VK_CONSTANTS)

	Vk_f11: INTEGER_32 = 122
			-- Declared in Windows as VK_F11
			-- (from WEL_VK_CONSTANTS)

	Vk_f12: INTEGER_32 = 123
			-- Declared in Windows as VK_F12
			-- (from WEL_VK_CONSTANTS)

	Vk_f13: INTEGER_32 = 124
			-- Declared in Windows as VK_F13
			-- (from WEL_VK_CONSTANTS)

	Vk_f14: INTEGER_32 = 125
			-- Declared in Windows as VK_F14
			-- (from WEL_VK_CONSTANTS)

	Vk_f15: INTEGER_32 = 126
			-- Declared in Windows as VK_F15
			-- (from WEL_VK_CONSTANTS)

	Vk_f16: INTEGER_32 = 127
			-- Declared in Windows as VK_F16
			-- (from WEL_VK_CONSTANTS)

	Vk_f17: INTEGER_32 = 128
			-- Declared in Windows as VK_F17
			-- (from WEL_VK_CONSTANTS)

	Vk_f18: INTEGER_32 = 129
			-- Declared in Windows as VK_F18
			-- (from WEL_VK_CONSTANTS)

	Vk_f19: INTEGER_32 = 130
			-- Declared in Windows as VK_F19
			-- (from WEL_VK_CONSTANTS)

	Vk_f2: INTEGER_32 = 113
			-- Declared in Windows as VK_F2
			-- (from WEL_VK_CONSTANTS)

	Vk_f20: INTEGER_32 = 131
			-- Declared in Windows as VK_F20
			-- (from WEL_VK_CONSTANTS)

	Vk_f21: INTEGER_32 = 132
			-- Declared in Windows as VK_F21
			-- (from WEL_VK_CONSTANTS)

	Vk_f22: INTEGER_32 = 133
			-- Declared in Windows as VK_F22
			-- (from WEL_VK_CONSTANTS)

	Vk_f23: INTEGER_32 = 134
			-- Declared in Windows as VK_F23
			-- (from WEL_VK_CONSTANTS)

	Vk_f24: INTEGER_32 = 135
			-- Declared in Windows as VK_F24
			-- (from WEL_VK_CONSTANTS)

	Vk_f3: INTEGER_32 = 114
			-- Declared in Windows as VK_F3
			-- (from WEL_VK_CONSTANTS)

	Vk_f4: INTEGER_32 = 115
			-- Declared in Windows as VK_F4
			-- (from WEL_VK_CONSTANTS)

	Vk_f5: INTEGER_32 = 116
			-- Declared in Windows as VK_F5
			-- (from WEL_VK_CONSTANTS)

	Vk_f6: INTEGER_32 = 117
			-- Declared in Windows as VK_F6
			-- (from WEL_VK_CONSTANTS)

	Vk_f7: INTEGER_32 = 118
			-- Declared in Windows as VK_F7
			-- (from WEL_VK_CONSTANTS)

	Vk_f8: INTEGER_32 = 119
			-- Declared in Windows as VK_F8
			-- (from WEL_VK_CONSTANTS)

	Vk_f9: INTEGER_32 = 120
			-- Declared in Windows as VK_F9
			-- (from WEL_VK_CONSTANTS)

	Vk_g: INTEGER_32 = 71
			-- (from WEL_VK_CONSTANTS)

	Vk_h: INTEGER_32 = 72
			-- (from WEL_VK_CONSTANTS)

	Vk_help: INTEGER_32 = 47
			-- Declared in Windows as VK_HELP
			-- (from WEL_VK_CONSTANTS)

	Vk_home: INTEGER_32 = 36
			-- Declared in Windows as VK_HOME
			-- (from WEL_VK_CONSTANTS)

	Vk_i: INTEGER_32 = 73
			-- (from WEL_VK_CONSTANTS)

	Vk_insert: INTEGER_32 = 45
			-- Declared in Windows as VK_INSERT
			-- (from WEL_VK_CONSTANTS)

	Vk_j: INTEGER_32 = 74
			-- (from WEL_VK_CONSTANTS)

	Vk_k: INTEGER_32 = 75
			-- (from WEL_VK_CONSTANTS)

	Vk_l: INTEGER_32 = 76
			-- (from WEL_VK_CONSTANTS)

	Vk_lbutton: INTEGER_32 = 1
			-- Declared in Windows as VK_LBUTTON
			-- (from WEL_VK_CONSTANTS)

	Vk_lcontrol: INTEGER_32 = 162
			-- Declared in Windows as VK_LCONTROL
			-- (from WEL_VK_CONSTANTS)

	Vk_left: INTEGER_32 = 37
			-- Declared in Windows as VK_LEFT
			-- (from WEL_VK_CONSTANTS)

	Vk_lmenu: INTEGER_32 = 164
			-- Declared in Windows as VK_LMENU
			-- (from WEL_VK_CONSTANTS)

	Vk_lshift: INTEGER_32 = 160
			-- Declared in Windows as VK_LSHIFT
			-- (from WEL_VK_CONSTANTS)

	Vk_m: INTEGER_32 = 77
			-- (from WEL_VK_CONSTANTS)

	Vk_mbutton: INTEGER_32 = 4
			-- Declared in Windows as VK_MBUTTON
			-- (from WEL_VK_CONSTANTS)

	Vk_menu: INTEGER_32 = 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 = 106
			-- Declared in Windows as VK_MULTIPLY
			-- (from WEL_VK_CONSTANTS)

	Vk_n: INTEGER_32 = 78
			-- (from WEL_VK_CONSTANTS)

	Vk_next: INTEGER_32 = 34
			-- Declared in Windows as VK_NEXT
			-- (from WEL_VK_CONSTANTS)

	Vk_numlock: INTEGER_32 = 144
			-- Declared in Windows as VK_NUMLOCK
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad0: INTEGER_32 = 96
			-- Declared in Windows as VK_NUMPAD0
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad1: INTEGER_32 = 97
			-- Declared in Windows as VK_NUMPAD1
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad2: INTEGER_32 = 98
			-- Declared in Windows as VK_NUMPAD2
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad3: INTEGER_32 = 99
			-- Declared in Windows as VK_NUMPAD3
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad4: INTEGER_32 = 100
			-- Declared in Windows as VK_NUMPAD4
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad5: INTEGER_32 = 101
			-- Declared in Windows as VK_NUMPAD5
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad6: INTEGER_32 = 102
			-- Declared in Windows as VK_NUMPAD6
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad7: INTEGER_32 = 103
			-- Declared in Windows as VK_NUMPAD7
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad8: INTEGER_32 = 104
			-- Declared in Windows as VK_NUMPAD8
			-- (from WEL_VK_CONSTANTS)

	Vk_numpad9: INTEGER_32 = 105
			-- Declared in Windows as VK_NUMPAD9
			-- (from WEL_VK_CONSTANTS)

	Vk_o: INTEGER_32 = 79
			-- (from WEL_VK_CONSTANTS)

	Vk_p: INTEGER_32 = 80
			-- (from WEL_VK_CONSTANTS)

	Vk_pause: INTEGER_32 = 19
			-- Declared in Windows as VK_PAUSE
			-- (from WEL_VK_CONSTANTS)

	Vk_print: INTEGER_32 = 42
			-- Declared in Windows as VK_PRINT
			-- (from WEL_VK_CONSTANTS)

	Vk_prior: INTEGER_32 = 33
			-- Declared in Windows as VK_PRIOR
			-- (from WEL_VK_CONSTANTS)

	Vk_q: INTEGER_32 = 81
			-- (from WEL_VK_CONSTANTS)

	Vk_r: INTEGER_32 = 82
			-- (from WEL_VK_CONSTANTS)

	Vk_rbutton: INTEGER_32 = 2
			-- Declared in Windows as VK_RBUTTON
			-- (from WEL_VK_CONSTANTS)

	Vk_rcontrol: INTEGER_32 = 163
			-- Declared in Windows as VK_RCONTROL
			-- (from WEL_VK_CONSTANTS)

	Vk_return: INTEGER_32 = 13
			-- Declared in Windows as VK_RETURN
			-- (from WEL_VK_CONSTANTS)

	Vk_right: INTEGER_32 = 39
			-- Declared in Windows as VK_RIGHT
			-- (from WEL_VK_CONSTANTS)

	Vk_rmenu: INTEGER_32 = 165
			-- Declared in Windows as VK_RMENU
			-- (from WEL_VK_CONSTANTS)

	Vk_rshift: INTEGER_32 = 161
			-- Declared in Windows as VK_RSHIFT
			-- (from WEL_VK_CONSTANTS)

	Vk_s: INTEGER_32 = 83
			-- (from WEL_VK_CONSTANTS)

	Vk_scroll: INTEGER_32 = 145
			-- Declared in Windows as VK_SCROLL
			-- (from WEL_VK_CONSTANTS)

	Vk_select: INTEGER_32 = 41
			-- Declared in Windows as VK_SELECT
			-- (from WEL_VK_CONSTANTS)

	Vk_separator: INTEGER_32 = 108
			-- Declared in Windows as VK_SEPARATOR
			-- (from WEL_VK_CONSTANTS)

	Vk_shift: INTEGER_32 = 16
			-- Declared in Windows as VK_SHIFT
			-- (from WEL_VK_CONSTANTS)

	Vk_snapshot: INTEGER_32 = 44
			-- Declared in Windows as VK_SNAPSHOT
			-- (from WEL_VK_CONSTANTS)

	Vk_space: INTEGER_32 = 32
			-- Declared in Windows as VK_SPACE
			-- (from WEL_VK_CONSTANTS)

	Vk_subtract: INTEGER_32 = 109
			-- Declared in Windows as VK_SUBTRACT
			-- (from WEL_VK_CONSTANTS)

	Vk_t: INTEGER_32 = 84
			-- (from WEL_VK_CONSTANTS)

	Vk_tab: INTEGER_32 = 9
			-- Declared in Windows as VK_TAB
			-- (from WEL_VK_CONSTANTS)

	Vk_u: INTEGER_32 = 85
			-- (from WEL_VK_CONSTANTS)

	Vk_up: INTEGER_32 = 38
			-- Declared in Windows as VK_UP
			-- (from WEL_VK_CONSTANTS)

	Vk_v: INTEGER_32 = 86
			-- (from WEL_VK_CONSTANTS)

	Vk_w: INTEGER_32 = 87
			-- (from WEL_VK_CONSTANTS)

	Vk_x: INTEGER_32 = 88
			-- (from WEL_VK_CONSTANTS)

	Vk_y: INTEGER_32 = 89
			-- (from WEL_VK_CONSTANTS)

	Vk_z: INTEGER_32 = 90
			-- (from WEL_VK_CONSTANTS)

	widget_imp_at_pointer_position: detachable 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_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	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_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	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_POSITIONED_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
feature -- Measurement

	dpi: NATURAL_32
			-- Window dpi.
			-- (from EV_POSITIONED_I)
	
feature -- Comparison

	frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			shallow_implies_deep: standard_equal (a, b) implies Result
			both_or_none_void: (a = Void) implies (Result = (b = Void))
			same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b))
			symmetric: Result implies deep_equal (b, a)

	frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b))

	frozen is_deep_equal alias "≡≡≡" (other: EV_CONTAINER_IMP): BOOLEAN
			-- Are Current and other attached to isomorphic object structures?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			shallow_implies_deep: standard_is_equal (other) implies Result
			same_type: Result implies same_type (other)
			symmetric: Result implies other.is_deep_equal (Current)

	is_equal (other: EV_CONTAINER_IMP): 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 ~ Current
			consistent: standard_is_equal (other) implies Result

	frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b 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
			instance_free: class
			definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b))

	frozen standard_is_equal alias "≜" (other: EV_CONTAINER_IMP): 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

	closest_dockable_target: detachable 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

	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

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

	flag_set (flags, mask: INTEGER_32): BOOLEAN
			-- Is mask set in flags?
			-- (from WEL_BIT_OPERATIONS)

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

	get_next_target (a_widget: EV_WIDGET): detachable 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

	has_capture: BOOLEAN
			-- Does Current have capture?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

	has_heavy_capture: BOOLEAN
			-- Does Current have heavy capture?
			-- (from EV_WIDGET_IMP)

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

	is_destroyed: BOOLEAN
			-- Is Current no longer usable?
			-- (from EV_ANY_I)

	is_in_min_height: BOOLEAN
			-- Is current recomputing its minimum height?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	is_in_min_width: BOOLEAN
			-- Is current recomputing its minimum width?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	Is_in_notify: CELL [BOOLEAN]
			-- Is current already notified from a change in its children?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	is_minheight_recomputation_needed: BOOLEAN
			-- Does minimum height need to be recomputed?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	is_minwidth_recomputation_needed: BOOLEAN
			-- Does minimum width need to be recomputed?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	is_notify_originator: BOOLEAN
			-- Did Current launch notification process?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	is_show_requested: BOOLEAN
			-- Is Current displayed in its parent?
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	is_terminal_service: BOOLEAN
			-- If window in terminal service (Remote Desktop)?
			-- (from WEL_WINDOWS_ROUTINES)
		require -- from WEL_WINDOWS_ROUTINES
			after_2000: (create {WEL_WINDOWS_VERSION} end).is_windows_2000_compatible

	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 = True
			-- All widgets are managed.
			-- (from EV_WIDGET_IMP)

	mode_is_configurable_target_menu: BOOLEAN
			-- Is the transport mechanism a configurable target menu?
			-- (from EV_PICK_AND_DROPABLE_I)

	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 a target menu?
			-- (from EV_PICK_AND_DROPABLE_I)

	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))

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

	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_hwnd_constant (c: POINTER): BOOLEAN
			-- Is c a valid hwnd constant?
			-- (from WEL_HWND_CONSTANTS)

	wel_has_capture: BOOLEAN
			-- Does Current have a windows capture?
			-- (from EV_WIDGET_IMP)

	window_of_item (hwnd: POINTER): detachable 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 end implies (create {INTERNAL} end).type_conforms_to ((create {INTERNAL} end).dynamic_type (Result), (create {INTERNAL} end).dynamic_type_from_string ("WEL_WINDOW"))
			is_proper_wel_window: Result /= Void implies Result.item = hwnd

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

	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)

	connect_radio_grouping (a_container: EV_CONTAINER)
			-- Join radio grouping of a_container to Current.
		require -- from EV_CONTAINER_I
			a_container_not_void: a_container /= Void

	destroy
			-- Destroy Current, but set the parent sensitive
			-- in case it was set insensitive by the child.
		require -- from  EV_ANY_I
			True
		ensure -- from EV_ANY_I
			is_in_destroy_set: is_in_destroy
			is_destroyed_set: is_destroyed

	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_dockable
			-- Ensure Current is not dockable
			-- (from EV_DOCKABLE_SOURCE_I)
		ensure -- from EV_DOCKABLE_SOURCE_I
			not_is_dockable: not is_dockable

	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)

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

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

	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: is_transport_enabled

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

	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

	merge_radio_button_groups (other: EV_CONTAINER)
			-- Merge Current radio button group with that of other.
			-- (from EV_CONTAINER_I)

	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)

	pnd_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_PICK_AND_DROPABLE_IMP)

	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

	reset_pebble_function
			-- Reset any values created by calling `pebble_function`.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			pebble_function_preserved: pebble_function = old pebble_function
			pebble_without_function: pebble_function = Void implies (pebble = old pebble)
			pebble_with_function: pebble_function /= Void implies pebble = Void

	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

	set_configurable_target_menu_handler (a_handler: like configurable_target_menu_handler)
			-- Set Configurable Target Menu Handler to a_handler.
			-- (from EV_PICK_AND_DROPABLE_I)

	set_configurable_target_menu_mode
			-- Set transport mechanism to a configurable target_menu.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			mode_is_target_menu: mode_is_configurable_target_menu

	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_focus
			-- Grab keyboard focus.
			-- (from EV_WIDGET_I)

	set_minheight_recomputation_needed (flag: BOOLEAN)
			-- Set `is_minheight_recomputation_needed` with flag?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	set_minwidth_recomputation_needed (flag: BOOLEAN)
			-- Set `is_minwidth_recomputation_needed` with flag?
			-- (from EV_SIZEABLE_CONTAINER_IMP)

	set_pebble (a_pebble: ANY)
			-- 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: pebble = a_pebble
			is_transport_enabled: is_transport_enabled

	set_pebble_function (a_function: FUNCTION [detachable 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: pebble_function = a_function
			is_transport_enabled: 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.to_integer_32 = a_x
			pick_y_assigned: pick_y.to_integer_32 = 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_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_target_menu_mode
			-- Set transport mechanism to a target_menu.
			-- (from EV_PICK_AND_DROPABLE_I)
		ensure -- from EV_PICK_AND_DROPABLE_I
			mode_is_target_menu: mode_is_target_menu

	show
			-- Show Current.
			-- Need to notify the parent.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_I
			True

	show_configurable_target_menu (a_x, a_y: INTEGER_32)
			-- Show the configurable target menu at position a_x, a_y relative to Current.
			-- (from EV_PICK_AND_DROPABLE_I)

	unconnect_radio_grouping (a_container: EV_CONTAINER)
			-- Removed radio grouping of a_container from Current.
		require -- from EV_CONTAINER_I
			a_container /= Void

	unmerge_radio_button_groups (other: EV_CONTAINER)
			-- Remove other from radio button group of Current.
			-- (from EV_CONTAINER_I)

	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 attached_interface.implementation.is_sensitive
			is_sensitive_if_orphaned: not has_parent implies attached_interface.implementation.is_sensitive
	
feature -- Element change

	extend (v: like item)
			-- Ensure that structure includes v.
			-- (from EV_CONTAINER_I)
		require -- from EV_CONTAINER_I
			v_not_void: v /= Void

	pixmap_equal_to (a_pixmap: EV_PIXMAP): BOOLEAN
			-- Is a_pixmap equal to pixmap?
			-- (from EV_PIXMAPABLE_I)

	remove_background_pixmap
			-- Remove background pixmap.
		ensure -- from EV_PIXMAPABLE_I
			pixmap_removed: background_pixmap = Void

	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: detachable like item)
			-- Replace `item` with v.
			-- (from EV_CONTAINER_I)

	set_background_color (color: EV_COLOR)
			-- Make color the new `background_color`
			-- (from EV_WIDGET_IMP)
		require -- from EV_COLORIZABLE_I
			a_color_not_void: color /= Void
		ensure -- from EV_COLORIZABLE_I
			background_color_assigned: is_initialized implies background_color.is_equal (color)

	set_background_pixmap (pix: EV_PIXMAP)
			-- Set the background pixmap and redraw the container.
		require -- from EV_PIXMAPABLE_I
			pixmap_not_void: pix /= Void

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

	set_foreground_color (color: EV_COLOR)
			-- Make color the new `foreground_color`
			-- (from EV_WIDGET_IMP)
		require -- from EV_COLORIZABLE_I
			a_color_not_void: color /= Void
		ensure -- from EV_COLORIZABLE_I
			foreground_color_assigned: is_initialized implies foreground_color.is_equal (color)

	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: attached help_context as l_help_context and then l_help_context ~ an_help_context

	set_parent_imp (par_imp: detachable EV_CONTAINER_IMP)
			-- Make par_imp the new parent of Current.
			-- par_imp can be Void then the parent is the screen.
	
feature -- Resizing

	reset_minimum_height
			-- Reset the minimum height.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_WIDGET_I
			True

	reset_minimum_size
			-- Reset the minimum size (width and height).
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_WIDGET_I
			True

	reset_minimum_width
			-- Reset the minimum width.
			-- (from EV_SIZEABLE_IMP)
		require -- from  EV_WIDGET_I
			True

	set_height (value: INTEGER_32)
			-- Make value the new height of Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	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
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		ensure -- from EV_WIDGET_I
			minimum_height_assigned: is_usable implies ((value > 0 implies attached_interface.minimum_height = value) or (value = 0 implies (attached_interface.minimum_height <= 1)))

	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
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		ensure -- from EV_WIDGET_I
			minimum_width_assigned: is_usable implies ((mw > 0 implies attached_interface.minimum_width = mw) or (mw = 0 implies (attached_interface.minimum_width <= 1)))
			minimum_height_assigned: is_usable implies ((mh > 0 implies attached_interface.minimum_height = mh) or (mh = 0 implies (attached_interface.minimum_height <= 1)))

	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
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
		ensure -- from EV_WIDGET_I
			minimum_width_assigned: is_usable implies ((value > 0 implies attached_interface.minimum_width = value) or (value = 0 implies (attached_interface.minimum_width <= 1)))

	set_size (w, h: INTEGER_32)
			-- Resize Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	set_width (value: INTEGER_32)
			-- Make value the new width of Current.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
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: EV_CONTAINER_IMP)
			-- 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: Current ~ other

	frozen deep_copy (other: EV_CONTAINER_IMP)
			-- 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: EV_CONTAINER_IMP
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		ensure -- from ANY
			deep_twin_not_void: Result /= Void
			deep_equal: deep_equal (Current, Result)

	frozen standard_copy (other: EV_CONTAINER_IMP)
			-- 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: EV_CONTAINER_IMP
			-- 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: EV_CONTAINER_IMP
			-- New object equal to Current
			-- `twin` calls `copy`; to change copying/twinning semantics, redefine `copy`.
			-- (from ANY)
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result ~ Current
	
feature -- Basic operations

	clear_flag (flags, mask: INTEGER_32): INTEGER_32
			-- Clear the mask in flags
			-- (from WEL_BIT_OPERATIONS)
		ensure -- from WEL_BIT_OPERATIONS
			flag_unset: not flag_set (Result, mask)

	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

	compute_minimum_height (a_is_size_forced: BOOLEAN)
			-- Recompute the minimum_width of the object.
			-- Should call only ev_set_minimum_xxxx.
			-- If a_is_size_forced then force an actual computation of the real size too.
			-- Was declared in {EV_SIZEABLE_CONTAINER_IMP} as synonym of `compute_minimum_width` and `compute_minimum_size`.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_CONTAINER_IMP
			not_is_destroyed: not is_destroyed

	compute_minimum_size (a_is_size_forced: BOOLEAN)
			-- Recompute the minimum_width of the object.
			-- Should call only ev_set_minimum_xxxx.
			-- If a_is_size_forced then force an actual computation of the real size too.
			-- Was declared in {EV_SIZEABLE_CONTAINER_IMP} as synonym of `compute_minimum_width` and `compute_minimum_height`.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_CONTAINER_IMP
			not_is_destroyed: not is_destroyed

	compute_minimum_width (a_is_size_forced: BOOLEAN)
			-- Recompute the minimum_width of the object.
			-- Should call only ev_set_minimum_xxxx.
			-- If a_is_size_forced then force an actual computation of the real size too.
			-- Was declared in {EV_SIZEABLE_CONTAINER_IMP} as synonym of `compute_minimum_height` and `compute_minimum_size`.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_CONTAINER_IMP
			not_is_destroyed: not is_destroyed

	cwin_hi_word (value: POINTER): INTEGER_32
			-- SDK HIWORD
			-- (from WEL_WORD_OPERATIONS)

	cwin_lo_word (value: POINTER): INTEGER_32
			-- SDK LOWORD
			-- (from WEL_WORD_OPERATIONS)

	cwin_make_long (low, high: INTEGER_32): POINTER
			-- SDK MAKELONG
			-- (from WEL_WORD_OPERATIONS)

	cwin_make_lparam (low, high: INTEGER_32): POINTER
			-- SKD MAKELPARAM
			-- (from WEL_WORD_OPERATIONS)

	frozen default: detachable EV_CONTAINER_IMP
			-- 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)
		ensure -- from ANY
			instance_free: class

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

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)
		ensure -- from ANY
			instance_free: class

	eif_current_object_id: INTEGER_32
			-- New identifier for Current
			-- (from IDENTIFIED_ROUTINES)
		ensure -- from IDENTIFIED_ROUTINES
			eif_current_object_id: Result > 0
			inserted: eif_is_object_id_of_current (Result)

	eif_id_any_object (an_id: INTEGER_32): detachable ANY
			-- Object associated with an_id
			-- (from IDENTIFIED_ROUTINES)
		require -- from IDENTIFIED_ROUTINES
			an_id_non_negative: an_id >= 0
		ensure -- from IDENTIFIED_ROUTINES
			instance_free: class

	eif_is_object_id_of_current (an_id: INTEGER_32): BOOLEAN
			-- Is an_id the associated object ID of Current.
			-- (from IDENTIFIED_ROUTINES)
		require -- from IDENTIFIED_ROUTINES
			an_id_non_negative: an_id >= 0

	eif_object_id (an_object: ANY): INTEGER_32
			-- New identifier for an_object
			-- (from IDENTIFIED_ROUTINES)
		ensure -- from IDENTIFIED_ROUTINES
			instance_free: class
			eif_object_id_positive: Result > 0
			inserted: eif_id_any_object (Result) = an_object

	eif_object_id_free (an_id: INTEGER_32)
			-- Free the entry an_id
			-- (from IDENTIFIED_ROUTINES)
		require -- from IDENTIFIED_ROUTINES
			an_id_non_negative: an_id >= 0
		ensure -- from IDENTIFIED_ROUTINES
			instance_free: class
			removed: eif_id_any_object (an_id) = Void

	ev_set_minimum_height (value: INTEGER_32; a_is_size_forced: BOOLEAN)
			-- Assign value to `minimum_height`.
			-- Should check if the user didn't set the minimum width
			-- before we set the new value.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	ev_set_minimum_size (a_width, a_height: INTEGER_32; a_is_size_forced: BOOLEAN)
			-- Assign mw to minimum_width and mh to minimum_height.
			-- Should check if the user didn't set the minimum width
			-- before to set the new value.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	ev_set_minimum_width (value: INTEGER_32; a_is_size_forced: BOOLEAN)
			-- Assign value to `minimum_width`.
			-- Should check if the user didn't set the minimum width
			-- before we set the new value.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

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

	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)

	notify_change (type: INTEGER_32; child: detachable EV_ANY_I; a_is_size_forced: BOOLEAN)
			-- Notify the current widget that the change identify by
			-- type have been done. For types, see internal_changes
			-- in class EV_SIZEABLE_IMP. If the container is shown,
			-- we integrate the changes immediatly, otherwise, we postpone
			-- them.
			-- Use the constants defined in EV_SIZEABLE_IMP
			-- (from EV_SIZEABLE_CONTAINER_IMP)

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

	propagate_background_color
			-- Propagate the current background color of the
			-- container to the children.
			-- (from EV_CONTAINER_I)
		ensure -- from EV_CONTAINER_I
			background_color_propagated: attached_interface.background_color_propagated

	propagate_foreground_color
			-- Propagate the current foreground color of the
			-- container to the children.
			-- (from EV_CONTAINER_I)
		ensure -- from EV_CONTAINER_I
			foreground_color_propagated: attached_interface.foreground_color_propagated

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

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

	set_flag (flags, mask: INTEGER_32): INTEGER_32
			-- Set the mask in flags
			-- (from WEL_BIT_OPERATIONS)
		ensure -- from WEL_BIT_OPERATIONS
			flag_set: flag_set (Result, mask)

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

	top_level_window_imp: detachable EV_WINDOW_IMP
			-- Top window of Current.
			-- (from EV_SIZEABLE_CONTAINER_IMP)
		require -- from EV_SIZEABLE_CONTAINER_IMP
			not_is_destroyed: not is_destroyed
		require -- from  EV_PICK_AND_DROPABLE_IMP
			True
	
feature -- Obsolete

	Nc_minheight: INTEGER_32 = 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 = 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 = 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

	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

	release_capture
			-- (from EV_PICK_AND_DROPABLE_IMP)
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True

	set_capture
			-- (from EV_PICK_AND_DROPABLE_IMP)
		require -- from  EV_DOCKABLE_SOURCE_IMP
			True
	
feature 

	Allocated_brushes: EV_GDI_ALLOCATED_BRUSHES
			-- (from EV_SHARED_GDI_OBJECTS)

	Allocated_pens: EV_GDI_ALLOCATED_PENS
			-- (from EV_SHARED_GDI_OBJECTS)
	
feature -- Access EV_DRAGABLE_SOURCE.

	dockable_dialog_target: detachable 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)

	frozen 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: detachable 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: detachable 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)

	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 -- Assertion test

	child_added (a_child: EV_WIDGET_IMP): BOOLEAN
			-- Has a_child been added properly?
	
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)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	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)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
feature -- Constants

	Key_0: INTEGER_32 = 1
			-- (from EV_KEY_CONSTANTS)

	Key_1: INTEGER_32 = 2
			-- (from EV_KEY_CONSTANTS)

	Key_2: INTEGER_32 = 3
			-- (from EV_KEY_CONSTANTS)

	Key_3: INTEGER_32 = 4
			-- (from EV_KEY_CONSTANTS)

	Key_4: INTEGER_32 = 5
			-- (from EV_KEY_CONSTANTS)

	Key_5: INTEGER_32 = 6
			-- (from EV_KEY_CONSTANTS)

	Key_6: INTEGER_32 = 7
			-- (from EV_KEY_CONSTANTS)

	Key_7: INTEGER_32 = 8
			-- (from EV_KEY_CONSTANTS)

	Key_8: INTEGER_32 = 9
			-- (from EV_KEY_CONSTANTS)

	Key_9: INTEGER_32 = 10
			-- (from EV_KEY_CONSTANTS)

	Key_a: INTEGER_32 = 68
			-- (from EV_KEY_CONSTANTS)

	Key_alt: INTEGER_32 = 96
			-- (from EV_KEY_CONSTANTS)

	Key_b: INTEGER_32 = 69
			-- (from EV_KEY_CONSTANTS)

	Key_back_space: INTEGER_32 = 40
			-- (from EV_KEY_CONSTANTS)

	Key_backquote: INTEGER_32 = 56
			-- (from EV_KEY_CONSTANTS)

	Key_backslash: INTEGER_32 = 54
			-- (from EV_KEY_CONSTANTS)

	Key_c: INTEGER_32 = 70
			-- (from EV_KEY_CONSTANTS)

	Key_caps_lock: INTEGER_32 = 45
			-- (from EV_KEY_CONSTANTS)

	Key_close_bracket: INTEGER_32 = 52
			-- (from EV_KEY_CONSTANTS)

	Key_comma: INTEGER_32 = 47
			-- (from EV_KEY_CONSTANTS)

	Key_ctrl: INTEGER_32 = 95
			-- (from EV_KEY_CONSTANTS)

	Key_d: INTEGER_32 = 71
			-- (from EV_KEY_CONSTANTS)

	Key_dash: INTEGER_32 = 57
			-- (from EV_KEY_CONSTANTS)

	Key_delete: INTEGER_32 = 67
			-- (from EV_KEY_CONSTANTS)

	Key_down_arrow: INTEGER_32 = 59
			-- (from EV_KEY_CONSTANTS)

	Key_e: INTEGER_32 = 72
			-- (from EV_KEY_CONSTANTS)

	Key_end: INTEGER_32 = 65
			-- (from EV_KEY_CONSTANTS)

	Key_enter: INTEGER_32 = 41
			-- (from EV_KEY_CONSTANTS)

	Key_equal: INTEGER_32 = 48
			-- (from EV_KEY_CONSTANTS)

	Key_escape: INTEGER_32 = 42
			-- (from EV_KEY_CONSTANTS)

	Key_f: INTEGER_32 = 73
			-- (from EV_KEY_CONSTANTS)

	Key_f1: INTEGER_32 = 27
			-- (from EV_KEY_CONSTANTS)

	Key_f10: INTEGER_32 = 36
			-- (from EV_KEY_CONSTANTS)

	Key_f11: INTEGER_32 = 37
			-- (from EV_KEY_CONSTANTS)

	Key_f12: INTEGER_32 = 38
			-- (from EV_KEY_CONSTANTS)

	Key_f2: INTEGER_32 = 28
			-- (from EV_KEY_CONSTANTS)

	Key_f3: INTEGER_32 = 29
			-- (from EV_KEY_CONSTANTS)

	Key_f4: INTEGER_32 = 30
			-- (from EV_KEY_CONSTANTS)

	Key_f5: INTEGER_32 = 31
			-- (from EV_KEY_CONSTANTS)

	Key_f6: INTEGER_32 = 32
			-- (from EV_KEY_CONSTANTS)

	Key_f7: INTEGER_32 = 33
			-- (from EV_KEY_CONSTANTS)

	Key_f8: INTEGER_32 = 34
			-- (from EV_KEY_CONSTANTS)

	Key_f9: INTEGER_32 = 35
			-- (from EV_KEY_CONSTANTS)

	Key_g: INTEGER_32 = 74
			-- (from EV_KEY_CONSTANTS)

	Key_h: INTEGER_32 = 75
			-- (from EV_KEY_CONSTANTS)

	Key_home: INTEGER_32 = 64
			-- (from EV_KEY_CONSTANTS)

	Key_i: INTEGER_32 = 76
			-- (from EV_KEY_CONSTANTS)

	Key_insert: INTEGER_32 = 66
			-- (from EV_KEY_CONSTANTS)

	Key_j: INTEGER_32 = 77
			-- (from EV_KEY_CONSTANTS)

	Key_k: INTEGER_32 = 78
			-- (from EV_KEY_CONSTANTS)

	Key_l: INTEGER_32 = 79
			-- (from EV_KEY_CONSTANTS)

	Key_left: INTEGER_32 = 60
			-- (from EV_KEY_CONSTANTS)

	Key_left_meta: INTEGER_32 = 97
			-- (from EV_KEY_CONSTANTS)

	Key_m: INTEGER_32 = 80
			-- (from EV_KEY_CONSTANTS)

	Key_menu: INTEGER_32 = 99
			-- (from EV_KEY_CONSTANTS)

	Key_n: INTEGER_32 = 81
			-- (from EV_KEY_CONSTANTS)

	Key_num_lock: INTEGER_32 = 24
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_0: INTEGER_32 = 11
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_1: INTEGER_32 = 12
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_2: INTEGER_32 = 13
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_3: INTEGER_32 = 14
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_4: INTEGER_32 = 15
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_5: INTEGER_32 = 16
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_6: INTEGER_32 = 17
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_7: INTEGER_32 = 18
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_8: INTEGER_32 = 19
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_9: INTEGER_32 = 20
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_add: INTEGER_32 = 21
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_decimal: INTEGER_32 = 26
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_divide: INTEGER_32 = 22
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_multiply: INTEGER_32 = 23
			-- (from EV_KEY_CONSTANTS)

	Key_numpad_subtract: INTEGER_32 = 25
			-- (from EV_KEY_CONSTANTS)

	Key_o: INTEGER_32 = 82
			-- (from EV_KEY_CONSTANTS)

	Key_open_bracket: INTEGER_32 = 51
			-- (from EV_KEY_CONSTANTS)

	Key_p: INTEGER_32 = 83
			-- (from EV_KEY_CONSTANTS)

	Key_page_down: INTEGER_32 = 63
			-- (from EV_KEY_CONSTANTS)

	Key_page_up: INTEGER_32 = 62
			-- (from EV_KEY_CONSTANTS)

	Key_pause: INTEGER_32 = 44
			-- (from EV_KEY_CONSTANTS)

	Key_period: INTEGER_32 = 49
			-- (from EV_KEY_CONSTANTS)

	Key_q: INTEGER_32 = 84
			-- (from EV_KEY_CONSTANTS)

	Key_quote: INTEGER_32 = 55
			-- (from EV_KEY_CONSTANTS)

	Key_r: INTEGER_32 = 85
			-- (from EV_KEY_CONSTANTS)

	Key_right: INTEGER_32 = 61
			-- (from EV_KEY_CONSTANTS)

	Key_right_meta: INTEGER_32 = 98
			-- (from EV_KEY_CONSTANTS)

	Key_s: INTEGER_32 = 86
			-- (from EV_KEY_CONSTANTS)

	Key_scroll_lock: INTEGER_32 = 46
			-- (from EV_KEY_CONSTANTS)

	Key_semicolon: INTEGER_32 = 50
			-- (from EV_KEY_CONSTANTS)

	Key_shift: INTEGER_32 = 94
			-- (from EV_KEY_CONSTANTS)

	Key_slash: INTEGER_32 = 53
			-- (from EV_KEY_CONSTANTS)

	Key_space: INTEGER_32 = 39
			-- (from EV_KEY_CONSTANTS)

	Key_t: INTEGER_32 = 87
			-- (from EV_KEY_CONSTANTS)

	Key_tab: INTEGER_32 = 43
			-- (from EV_KEY_CONSTANTS)

	Key_u: INTEGER_32 = 88
			-- (from EV_KEY_CONSTANTS)

	Key_up_arrow: INTEGER_32 = 58
			-- (from EV_KEY_CONSTANTS)

	Key_v: INTEGER_32 = 89
			-- (from EV_KEY_CONSTANTS)

	Key_w: INTEGER_32 = 90
			-- (from EV_KEY_CONSTANTS)

	Key_x: INTEGER_32 = 91
			-- (from EV_KEY_CONSTANTS)

	Key_y: INTEGER_32 = 92
			-- (from EV_KEY_CONSTANTS)

	Key_z: INTEGER_32 = 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 -- Conversion from Eiffel to Windows

	frozen to_lparam (i: INTEGER_32): POINTER
			-- Convert integer value i in a valid LPARAM value.
			-- (from WEL_DATA_TYPE)
		ensure -- from WEL_DATA_TYPE
			is_class: class

	frozen to_lresult (i: INTEGER_32): POINTER
			-- Convert integer value i in a valid LRESULT value.
			-- (from WEL_DATA_TYPE)
		ensure -- from WEL_DATA_TYPE
			is_class: class

	frozen to_wparam (i: INTEGER_32): POINTER
			-- Convert integer value i in a valid WPARAM value.
			-- (from WEL_DATA_TYPE)
		ensure -- from WEL_DATA_TYPE
			is_class: class
	
feature -- Deferred features

	absolute_x: INTEGER_32
			-- Result is x position relative to screen in pixels.
			-- (from EV_WIDGET_IMP)

	absolute_y: INTEGER_32
			-- Result is y position relative to screen in pixels.
			-- (from EV_WIDGET_IMP)

	cwin_get_next_dlgtabitem (hdlg, hctl: POINTER; previous: BOOLEAN): POINTER
			-- SDK GetNextDlgTabItem
			-- (from EV_WIDGET_IMP)

	default_style: INTEGER_32
			-- Default style of Current.
			-- (from EV_WIDGET_IMP)

	disable
			-- Disable mouse and keyboard input
			-- (from EV_WIDGET_IMP)

	enable
			-- Enable mouse and keyboard input.
			-- (from EV_WIDGET_IMP)

	exists: BOOLEAN
			-- Does the window exist?
			-- (from EV_WIDGET_IMP)

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

	invalidate
			-- Cause Current to re-draw.
			-- (from EV_WIDGET_IMP)

	is_control_in_window (hwnd_control: POINTER): BOOLEAN
			-- Is the control of handle hwnd_control
			-- located inside the current window?
			-- (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 EV_WIDGET_IMP
			exists: exists

	return_current_if_next_tabstop_widget (start_widget: EV_WIDGET; search_pos: INTEGER_32; forwards: BOOLEAN): detachable 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

	set_style (a_style: INTEGER_32)
			-- Assign a_Style to `style` of Current.
			-- (from EV_WIDGET_IMP)

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

	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)

	style: INTEGER_32
			-- Current style of Current
			-- (from EV_WIDGET_IMP)

	frozen trigger_dpi_actions (a_dpi: NATURAL_32; a_width, a_height: INTEGER_32)
			-- Current has been resized.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			exists: exists

	frozen trigger_resize_actions (a_width, a_height: INTEGER_32)
			-- Current has been resized.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			exists: exists

	update
			-- Update the client area by sending a Wm_paint message.
			-- (from EV_WIDGET_IMP)

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

	wel_destroy
			-- (from EV_WIDGET_IMP)

	wel_foreground_color: WEL_COLOR_REF
			-- Result is foreground color of Current.
			-- (from EV_WIDGET_IMP)

	wel_item: POINTER
			-- (from EV_WIDGET_IMP)

	wel_parent: detachable WEL_WINDOW
			-- The wel parent of Current.
			-- (from EV_WIDGET_IMP)

	wel_set_parent (a_parent: detachable WEL_WINDOW)
			-- Set the wel parent of Current.
			-- (from EV_WIDGET_IMP)
		require -- from EV_WIDGET_IMP
			exists: exists

	window_rect: WEL_RECT
			-- Result is rectangle of Current.
			-- (from EV_WIDGET_IMP)
	
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

	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

	dpi_changed_actions: EV_DPI_ACTION_SEQUENCE
			-- Actions to be performed when dpi changes.
			-- (from EV_WIDGET_ACTION_SEQUENCES_I)
		ensure -- from EV_WIDGET_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: EV_LITE_ACTION_SEQUENCE [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

	init_dpi_changed_actions (a_dpi_changed_actions: like dpi_changed_actions)
			-- Initialize a_dpi_changed_actions accordingly to the current widget.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	init_file_drop_actions (a_file_drop_actions: like file_drop_actions)
			-- Create and initialize
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	init_resize_actions (a_resize_actions: like resize_actions)
			-- Initialize a_resize_actions accordingly to the current widget.
			-- (from EV_WIDGET_IMP)
		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
			True

	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: EV_NEW_ITEM_ACTION_SEQUENCE
			-- Actions to be performed when a new item is added.
			-- (from EV_CONTAINER_ACTION_SEQUENCES_I)
		ensure -- from EV_CONTAINER_ACTION_SEQUENCES_I
			not_void: Result /= Void

	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: EV_LITE_ACTION_SEQUENCE [EV_WIDGET]
			-- Actions to be performed before an item is removed.

	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
	
feature -- Feature that should be directly implemented by externals

	cwin_show_window (hwnd: POINTER; cmd_show: INTEGER_32)
			-- SDK ShowWindow
			-- (from WEL_WINDOW)
			-- (export status {NONE})
			-- (from EV_WIDGET_IMP)
		ensure -- from EV_WIDGET_IMP
			is_class: class

	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 -- For dialogs

	frozen dwlp_dlgproc: INTEGER_32
			-- (from WEL_GWL_CONSTANTS)

	frozen dwlp_msgresult: INTEGER_32
			-- (from WEL_GWL_CONSTANTS)

	frozen dwlp_user: INTEGER_32
			-- (from WEL_GWL_CONSTANTS)
	
feature -- For windows

	Gwl_hinstance: INTEGER_32 = -6
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_hinstance`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_hwndparent: INTEGER_32 = -8
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_hwndparent`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_id: INTEGER_32 = -12
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_id`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_userdata: INTEGER_32 = -21
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_userdata`.
			-- (from WEL_GWL_CONSTANTS)

	Gwl_wndproc: INTEGER_32 = -4
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwlp_wndproc`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_hinstance: INTEGER_32 = -6
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_hinstance`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_hwndparent: INTEGER_32 = -8
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_hwndparent`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_id: INTEGER_32 = -12
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_id`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_userdata: INTEGER_32 = -21
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_userdata`.
			-- (from WEL_GWL_CONSTANTS)

	Gwlp_wndproc: INTEGER_32 = -4
			-- Was declared in {WEL_GWL_CONSTANTS} as synonym of `gwl_wndproc`.
			-- (from WEL_GWL_CONSTANTS)
	
feature -- Implementation : deferred features

	client_rect: WEL_RECT
			-- Area used by Current.

	disable_default_processing

	set_message_return_value (v: POINTER)
	
feature -- Output

	Io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			io_not_void: Result /= Void

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- (from ANY)
		ensure -- from ANY
			out_not_void: Result /= Void

	print (o: detachable ANY)
			-- Write terse external representation of o
			-- on standard output.
			-- (from ANY)
		ensure -- from ANY
			instance_free: class

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- (from ANY)
		ensure -- from ANY
			tagged_out_not_void: Result /= Void
	
feature -- Platform

	Operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
		ensure -- from ANY
			instance_free: class
			operating_environment_not_void: Result /= Void
	
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)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
feature -- Status Report

	has_focus: BOOLEAN
			-- Does widget have the keyboard focus?
			-- (from EV_WIDGET_I)

	is_displayed: BOOLEAN
			-- Is Current visible on the screen?
			-- False if Current is entirely obscured by another window.
			-- (from EV_WIDGET_I)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
feature -- deferred feature

	wel_height: INTEGER_32
			-- Real `height` of widget as seen on screen.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed

	wel_width: INTEGER_32
			-- Real `width` of widget as seen on screen.
			-- (from EV_SIZEABLE_IMP)
		require -- from EV_SIZEABLE_IMP
			not_is_destroyed: not is_destroyed
	
invariant
	new_item_actions_not_void: is_usable implies new_item_actions /= Void
	remove_item_actions_not_void: is_usable implies remove_item_actions /= Void

		-- 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: attached pebble_function as l_pebble_function implies l_pebble_function.valid_operands ([1, 1])

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

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

		-- 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_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

note
	copyright: "Copyright (c) 1984-2014, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		5949 Hollister Ave., 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_CONTAINER_IMP


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