    indexing
    	description: "[
    		Widget onto which graphical primatives may be drawn.
    		Primitives are drawn directly onto the screen without buffering.
    		(When buffering is required use EV_PIXMAP.)
    	]"
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	keywords: "drawable, expose, primitive, figure, draw, paint, image"
    	date: "$Date: 2006-08-28 17:59:15 -0700 (Mon, 28 Aug 2006) $"
    	revision: "$Revision: 63044 $"

    class interface
    	EV_DRAWING_AREA

    create
    	default_create
    			-- Standard creation procedure.
    			-- (from EV_ANY)
    		require -- from  ANY
    			True
    		ensure then -- from EV_ANY
    			is_coupled: implementation /= Void
    			is_initialized: is_initialized
    			default_create_called_set: default_create_called
    			is_in_default_state: is_in_default_state

    feature -- Access

    	accept_cursor: EV_POINTER_STYLE
    			-- `Result' is cursor displayed when the screen pointer is over a
    			-- target that accepts pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			result_not_void: Result /= Void
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.accept_cursor

    	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', `Current' will use the default drop target.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.actual_drop_target_agent

    	background_color: EV_COLOR
    			-- Color displayed behind foreground features.
    			-- (from EV_COLORIZABLE)
    		require -- from EV_COLORIZABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_COLORIZABLE
    			bridge_ok: Result.is_equal (implementation.background_color)

    	clip_area: EV_RECTANGLE
    			-- Rectangular area to apply clipping on.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			bridge_ok: (Result = Void) = (implementation.clip_area = Void)

    	dashed_line_style: BOOLEAN
    			-- Are lines drawn dashed?
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			bridge_ok: Result = implementation.dashed_line_style

    	data: ANY
    			-- Arbitrary user data may be stored here.
    			-- (from EV_ANY)

    	default_key_processing_handler: PREDICATE [ANY, TUPLE [EV_KEY]] assign set_default_key_processing_handler
    			-- 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)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.default_key_processing_handler

    	deny_cursor: EV_POINTER_STYLE
    			-- `Result' is cursor displayed when the screen pointer is over a
    			-- target that does not accept pebble during pick and drop.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			result_not_void: Result /= Void
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.deny_cursor

    	drawing_mode: INTEGER_32
    			-- Logical operation on pixels when drawing.
    			-- Default: drawing_mode_copy.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			bridge_ok: Result = implementation.drawing_mode

    	font: EV_FONT
    			-- Typeface appearance for `Current'.
    			-- (from EV_FONTABLE)
    		require -- from EV_FONTABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_FONTABLE
    			not_void: Result /= Void
    			bridge_ok: Result.is_equal (implementation.font)

    	foreground_color: EV_COLOR
    			-- Color of foreground features like text.
    			-- (from EV_COLORIZABLE)
    		require -- from EV_COLORIZABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_COLORIZABLE
    			bridge_ok: Result.is_equal (implementation.foreground_color)

    	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)

    	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)
    		require -- from EV_HELP_CONTEXTABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_HELP_CONTEXTABLE
    			bridge_ok: Result = implementation.help_context

    	frozen id_object (an_id: INTEGER_32): IDENTIFIED
    			-- Object associated with `an_id' (void if no such object)
    			-- (from IDENTIFIED)
    		ensure -- from IDENTIFIED
    			consistent: Result = Void or else Result.object_id = an_id

    	line_width: INTEGER_32
    			-- Line thickness. Default: 1.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			bridge_ok: Result = implementation.line_width

    	frozen object_id: INTEGER_32
    			-- Unique for current object in any given session
    			-- (from IDENTIFIED)
    		ensure -- from IDENTIFIED
    			valid_id: id_object (Result) = Current

    	parent: EV_CONTAINER
    			-- Contains `Current'.
    			-- (from EV_WIDGET)
    		require -- from EV_CONTAINABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_WIDGET
    			bridge_ok: Result = implementation.parent

    	pebble: ANY
    			-- Data to be transported by pick and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.pebble

    	pebble_function: FUNCTION [ANY, TUPLE, ANY]
    			-- Returns data to be transported by pick and drop mechanism.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.pebble_function

    	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)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.pebble_positioning_enabled

    	pebble_x_position: INTEGER_32
    			-- Initial x position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.pebble_x_position

    	pebble_y_position: INTEGER_32
    			-- Initial y position for pick and drop relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.pebble_y_position

    	pointer_position: EV_COORDINATE
    			-- Position of the screen pointer relative to `Current'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			is_show_requested: is_show_requested

    	pointer_style: EV_POINTER_STYLE
    			-- Cursor displayed when pointer is over this widget.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed

    	real_target: EV_DOCKABLE_TARGET
    			-- `Result' is target used during a dockable transport if
    			-- mouse pointer is above `Current'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.real_target

    	target_name: STRING_GENERAL
    			-- Optional textual name describing `Current' pick and drop hole.
    			-- (from EV_ABSTRACT_PICK_AND_DROPABLE)

    	tile: EV_PIXMAP
    			-- Pixmap that is used to draw filled primitives with
    			-- instead of foreground_color.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			bridge_ok: (Result = Void) = (implementation.tile = Void)

    	tooltip: STRING_32
    			-- Tooltip displayed on `Current'.
    			-- If `Result' is empty then no tooltip displayed.
    			-- (from EV_TOOLTIPABLE)
    		require -- from EV_TOOLTIPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_TOOLTIPABLE
    			bridge_ok: equal (Result, implementation.tooltip)
    			not_void: Result /= Void
    			cloned: Result /= implementation.tooltip

    feature -- Measurement

    	screen_x: INTEGER_32
    			-- Horizontal offset relative to left of screen in pixels.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.screen_x

    	screen_y: INTEGER_32
    			-- Vertical offset relative to top of screen in pixels.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.screen_y

    feature -- Comparison

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

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

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

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

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

    feature -- Status report

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

    	has_capture: BOOLEAN
    			-- Does widget have capture?
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.has_capture

    	has_focus: BOOLEAN
    			-- Does widget have the keyboard focus?
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.has_focus

    	is_displayed: BOOLEAN
    			-- Is `Current' visible on the screen?
    			-- `True' when show requested and parent displayed.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.is_displayed

    	is_dockable: BOOLEAN
    			-- Is `Current' dockable?
    			-- If `True', then `Current' may be dragged
    			-- from its current parent.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			bridge_ok: Result = implementation.is_dockable

    	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 transport?
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			bridge_ok: Result = implementation.is_external_docking_enabled

    	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)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			bridge_ok: Result = implementation.is_external_docking_relative

    	is_sensitive: BOOLEAN
    			-- Is object sensitive to user input.
    			-- (from EV_SENSITIVE)
    		require -- from EV_SENSITIVE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_SENSITIVE
    			bridge_ok: Result = implementation.user_is_sensitive

    	is_show_requested: BOOLEAN
    			-- Will `Current' be displayed when its parent is?
    			-- See also is_displayed.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			bridge_ok: Result = implementation.is_show_requested

    	is_tabable_from: BOOLEAN
    			-- Is Current able to be tabbed from?
    			-- (from EV_TAB_CONTROLABLE)
    		require -- from EV_TAB_CONTROLABLE
    			not_destroyed: not is_destroyed

    	is_tabable_to: BOOLEAN
    			-- Is Current able to be tabbed to?
    			-- (from EV_TAB_CONTROLABLE)
    		require -- from EV_TAB_CONTROLABLE
    			not_destroyed: not is_destroyed

    	mode_is_drag_and_drop: BOOLEAN
    			-- Is the user interface mode drag and drop?
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.mode_is_drag_and_drop

    	mode_is_pick_and_drop: BOOLEAN
    			-- Is the user interface mode pick and drop?
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.mode_is_pick_and_drop

    	mode_is_target_menu: BOOLEAN
    			-- Is the user interface mode a pop-up menu of targets?
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure then -- from EV_PICK_AND_DROPABLE
    			bridge_ok: Result = implementation.mode_is_target_menu

    	real_source: EV_DOCKABLE_SOURCE
    			-- `Result' is source to be dragged
    			--  when a docking drag occurs on `Current'.
    			-- If `Void', `Current' is dragged.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			bridge_ok: Result = implementation.real_source

    	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))

    feature -- Status setting

    	center_pointer
    			-- Position screen pointer over center of `Current'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed

    	disable_capture
    			-- Disable grab of all user input events.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			not_has_capture: not has_capture

    	disable_dockable
    			-- Ensure `Current' is not dockable.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			not_is_dockable: not is_dockable

    	disable_external_docking
    			-- Assign `False' to is_external_docking_enabled.
    			-- Forbid `Current' to be docked into an EV_DOCKABLE_DIALOG
    			-- When there is no valid EV_DRAGABLE_TARGET upon completion
    			-- of transport.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    			is_dockable: is_dockable
    		ensure -- from EV_DOCKABLE_SOURCE
    			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)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    			external_docking_enabled: is_external_docking_enabled
    		ensure -- from EV_DOCKABLE_SOURCE
    			external_docking_not_relative: not is_external_docking_relative

    	disable_pebble_positioning
    			-- Assign `False' to pebble_positioning_enabled.
    			-- The pick and drop will start at the pointer position.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_PICK_AND_DROPABLE
    			pebble_positioning_updated: not pebble_positioning_enabled

    	disable_sensitive
    			-- Make object non-sensitive to user input.
    			-- (from EV_SENSITIVE)
    		require -- from EV_SENSITIVE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_SENSITIVE
    			is_unsensitive: not is_sensitive

    	disable_tabable_from
    			-- Make is_tabable_from `False'.
    			-- (from EV_TAB_CONTROLABLE)
    		require -- from EV_TAB_CONTROLABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_TAB_CONTROLABLE
    			not_is_tabable_from: not is_tabable_from

    	disable_tabable_to
    			-- Make is_tabable_to `False'.
    			-- (from EV_TAB_CONTROLABLE)
    		require -- from EV_TAB_CONTROLABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_TAB_CONTROLABLE
    			not_is_tabable_to: not is_tabable_to

    	enable_capture
    			-- Grab all user input events (mouse and keyboard).
    			-- disable_capture must be called to resume normal input handling.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			is_displayed: is_displayed
    		ensure -- from EV_WIDGET
    			has_capture: has_capture

    	enable_dockable
    			-- Ensure `Current' is dockable.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			is_dockable: is_dockable

    	enable_external_docking
    			-- Assign `True' to is_external_docking_enabled.
    			-- Allows `Current' to be docked into an EV_DOCKABLE_DIALOG
    			-- When there is no valid EV_DRAGABLE_TARGET upon completion
    			-- of transport.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    			is_dockable: is_dockable
    		ensure -- from EV_DOCKABLE_SOURCE
    			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)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    			external_docking_enabled: is_external_docking_enabled
    		ensure -- from EV_DOCKABLE_SOURCE
    			external_docking_not_relative: is_external_docking_relative

    	enable_pebble_positioning
    			-- Assign `True' to pebble_positioning_enabled.
    			-- Use pebble_x_position and pebble_y_position as the initial coordinates
    			-- for the pick and drop in pixels relative to `Current'.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_PICK_AND_DROPABLE
    			pebble_positioning_updated: pebble_positioning_enabled

    	enable_sensitive
    			-- Make object sensitive to user input.
    			-- (from EV_SENSITIVE)
    		require -- from EV_SENSITIVE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_SENSITIVE
    			is_sensitive: (parent = Void or parent_is_sensitive) implies is_sensitive

    	enable_tabable_from
    			-- Make is_tabable_from `True'.
    			-- (from EV_TAB_CONTROLABLE)
    		require -- from EV_TAB_CONTROLABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_TAB_CONTROLABLE
    			is_tabable_from: is_tabable_from

    	enable_tabable_to
    			-- Make is_tabable_to `True'.
    			-- (from EV_TAB_CONTROLABLE)
    		require -- from EV_TAB_CONTROLABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_TAB_CONTROLABLE
    			is_tabable_to: is_tabable_to

    	hide
    			-- Request that `Current' not be displayed even when its parent is.
    			-- If successful, make is_show_requested `False'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed

    	remove_default_key_processing_handler
    			-- Ensure default_key_processing_handler is Void.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			default_key_processing_handler_removed: default_key_processing_handler = Void

    	remove_pebble
    			-- Make pebble `Void' and pebble_function `Void,
    			-- Removing transport.
    			-- (from EV_PICK_AND_DROPABLE)
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			pebble_removed: pebble = Void and pebble_function = Void

    	remove_real_source
    			-- Ensure real_source is `Void'.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DOCKABLE_SOURCE
    			real_source_void: real_source = Void

    	remove_real_target
    			-- Ensure real_target is `Void'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    		ensure -- from EV_WIDGET
    			real_target_void: real_target = 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)
    		require -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			a_cursor_not_void: a_cursor /= Void
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			accept_cursor_assigned: accept_cursor.is_equal (a_cursor)

    	set_actual_drop_target_agent (an_agent: like actual_drop_target_agent)
    			-- Assign `an_agent' to actual_drop_target_agent.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			an_agent_not_void: an_agent /= Void
    		ensure -- from EV_WIDGET
    			assigned: actual_drop_target_agent = an_agent

    	set_default_colors
    			-- Set foreground and background color to their default values.
    			-- (from EV_COLORIZABLE)
    		require -- from EV_COLORIZABLE
    			not_destroyed: not is_destroyed

    	set_default_key_processing_handler (a_handler: like default_key_processing_handler)
    			-- Assign default_key_processing_handler to `a_handler'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed

    	set_deny_cursor (a_cursor: like deny_cursor)
    			-- Set `a_cursor' to be displayed when the screen pointer is not
    			-- over a valid target.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			a_cursor_not_void: a_cursor /= Void
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			deny_cursor_assigned: deny_cursor.is_equal (a_cursor)

    	set_drag_and_drop_mode
    			-- Set user interface mode to drag and drop.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_PICK_AND_DROPABLE
    			drag_and_drop_set: mode_is_drag_and_drop

    	set_focus
    			-- Grab keyboard focus.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			is_displayed: is_displayed
    			is_sensitive: is_sensitive

    	set_pebble (a_pebble: like pebble)
    			-- Assign `a_pebble' to pebble.
    			-- Overrides set_pebble_function.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			a_pebble_not_void: a_pebble /= Void
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			pebble_assigned: pebble = a_pebble

    	set_pebble_function (a_function: FUNCTION [ANY, TUPLE, ANY])
    			-- Set `a_function' to compute pebble.
    			-- It will be called once each time a pick occurs, the result
    			-- will be assigned to pebble for the duration of transport.
    			-- When a pick occurs, the pick position in widget coordinates,
    			-- <<x, y>> in pixels, is passed.
    			-- To handle this data use `a_function' of type
    			-- FUNCTION [ANY, TUPLE [INTEGER, INTEGER], ANY] and return the
    			-- pebble as a function of x and y.
    			-- Overrides set_pebble.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			a_function_not_void: a_function /= Void
    			a_function_takes_two_integer_open_operands: a_function.valid_operands ([1, 1])
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			pebble_function_assigned: pebble_function = a_function

    	set_pebble_position (a_x, a_y: INTEGER_32)
    			-- Set the initial position for pick and drop
    			-- Coordinates are in pixels and are relative to position of `Current'.
    			-- Pebble_positioning_enabled must be `True' for the position to be used,
    			-- use enable_pebble_positioning.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_PICK_AND_DROPABLE
    			pebble_position_assigned: pebble_x_position = a_x and pebble_y_position = a_y

    	set_pick_and_drop_mode
    			-- Set user interface mode to pick and drop.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_PICK_AND_DROPABLE
    			pick_and_drop_set: mode_is_pick_and_drop

    	set_real_source (dockable_source: EV_DOCKABLE_SOURCE)
    			-- Assign `dockable_source' to real_source.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    			is_dockable: is_dockable
    			dockable_source_not_void: dockable_source /= Void
    			dockable_source_is_parent_recursive: source_has_current_recursive (dockable_source)
    		ensure -- from EV_DOCKABLE_SOURCE
    			real_source_assigned: real_source = dockable_source

    	set_real_target (a_target: EV_DOCKABLE_TARGET)
    			-- Assign `a_target' to real_target.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			target_not_void: a_target /= Void
    		ensure -- from EV_WIDGET
    			assigned: real_target = a_target

    	set_target_menu_mode
    			-- Set user interface mode to pop-up menu of targets.
    			-- (from EV_PICK_AND_DROPABLE)
    		require -- from EV_PICK_AND_DROPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_PICK_AND_DROPABLE
    			target_menu_mode_set: mode_is_target_menu

    	set_target_name (a_name: STRING_GENERAL)
    			-- Assign `a_name' to target_name.
    			-- (from EV_ABSTRACT_PICK_AND_DROPABLE)
    		require -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			a_name_not_void: a_name /= Void
    		ensure -- from EV_ABSTRACT_PICK_AND_DROPABLE
    			target_name_assigned: a_name /= target_name and a_name.is_equal (target_name)

    	show
    			-- Request that `Current' be displayed when its parent is.
    			-- `True' by default.
    			-- If successful, make is_show_requested `True'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed

    feature -- Element change

    	disable_dashed_line_style
    			-- Draw lines solid.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			dashed_line_style_disabled: not dashed_line_style

    	enable_dashed_line_style
    			-- Draw lines dashed.
    			-- See note at top.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			dashed_line_style_enabled: dashed_line_style

    	remove_clip_area
    			-- Do not apply any clipping.
    			-- Was declared in EV_DRAWABLE as synonym of remove_clipping.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			clip_area_void: clip_area = Void

    	remove_clipping
    			-- Do not apply any clipping.
    			-- Was declared in EV_DRAWABLE as synonym of remove_clip_area.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			clip_area_void: clip_area = Void

    	remove_help_context
    			-- Remove key press action associated with `EV_APPLICATION.help_key'.
    			-- (from EV_HELP_CONTEXTABLE)
    		require -- from EV_HELP_CONTEXTABLE
    			not_destroyed: not is_destroyed
    			help_context_not_void: help_context /= Void
    		ensure -- from EV_HELP_CONTEXTABLE
    			no_help_context: help_context = Void

    	remove_tile
    			-- Do not apply a tile when filling.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			tile_void: tile = Void

    	remove_tooltip
    			-- Make tooltip empty.
    			-- (from EV_TOOLTIPABLE)
    		require -- from EV_TOOLTIPABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_TOOLTIPABLE
    			tooltip_removed: tooltip.is_empty

    	set_background_color (a_color: like background_color)
    			-- Assign `a_color' to background_color.
    			-- (from EV_COLORIZABLE)
    		require -- from EV_COLORIZABLE
    			not_destroyed: not is_destroyed
    			a_color_not_void: a_color /= Void
    		ensure -- from EV_COLORIZABLE
    			background_color_assigned: background_color.is_equal (a_color)

    	set_clip_area (an_area: EV_RECTANGLE)
    			-- Set area which will be refreshed.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			an_area_not_void: an_area /= Void
    		ensure -- from EV_DRAWABLE
    			clip_area_assigned: clip_area.is_equal (an_area)

    	set_clip_region (a_region: EV_REGION)
    			-- Set region which will be refreshed.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_region_not_void: a_region /= Void

    	set_data (some_data: like data)
    			-- Assign `some_data' to data.
    			-- (from EV_ANY)
    		require -- from EV_ANY
    			not_destroyed: not is_destroyed
    		ensure -- from EV_ANY
    			data_assigned: data = some_data

    	set_drawing_mode (a_mode: INTEGER_32)
    			-- Set drawing mode to `a_logical_mode'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_mode_valid: valid_drawing_mode (a_mode)
    		ensure -- from EV_DRAWABLE
    			drawing_mode_assigned: drawing_mode = a_mode

    	set_font (a_font: EV_FONT)
    			-- Assign `a_font' to font.
    			-- (from EV_FONTABLE)
    		require -- from EV_FONTABLE
    			not_destroyed: not is_destroyed
    			a_font_not_void: a_font /= Void
    		ensure -- from EV_FONTABLE
    			font_assigned: font.is_equal (a_font) and font /= a_font

    	set_foreground_color (a_color: like foreground_color)
    			-- Assign `a_color' to foreground_color.
    			-- (from EV_COLORIZABLE)
    		require -- from EV_COLORIZABLE
    			not_destroyed: not is_destroyed
    			a_color_not_void: a_color /= Void
    		ensure -- from EV_COLORIZABLE
    			foreground_color_assigned: foreground_color.is_equal (a_color)

    	set_help_context (an_help_context: like help_context)
    			-- Assign `an_help_context' to help_context.
    			-- (from EV_HELP_CONTEXTABLE)
    		require -- from EV_HELP_CONTEXTABLE
    			not_destroyed: not is_destroyed
    			an_help_context_not_void: an_help_context /= Void
    		ensure -- from EV_HELP_CONTEXTABLE
    			help_context_assigned: help_context.is_equal (an_help_context)

    	set_line_width (a_width: INTEGER_32)
    			-- Assign `a_width' to line_width.
    			-- See note at top.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_width_positive_or_zero: a_width >= 0
    		ensure -- from EV_DRAWABLE
    			line_width_assigned: line_width = a_width

    	set_minimum_height (a_minimum_height: INTEGER_32)
    			-- Set `a_minimum_height' in pixels to minimum_height.
    			-- If height is less than `a_minimum_height', resize.
    			-- From now, minimum_height is fixed and will not be changed
    			-- dynamically by the application anymore.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			a_minimum_height_positive: a_minimum_height >= 0
    		ensure -- from EV_WIDGET
    			minimum_height_assigned: minimum_height = a_minimum_height
    			minimum_height_set_by_user_set: minimum_height_set_by_user

    	set_minimum_size (a_minimum_width, a_minimum_height: INTEGER_32)
    			-- Assign `a_minimum_height' to minimum_height
    			-- and `a_minimum_width' to minimum_width in pixels.
    			-- If width or height is less than minimum size, resize.
    			-- From now, minimum size is fixed and will not be changed
    			-- dynamically by the application anymore.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			a_minimum_width_positive: a_minimum_width >= 0
    			a_minimum_height_positive: a_minimum_height >= 0
    		ensure -- from EV_WIDGET
    			minimum_width_assigned: minimum_width = a_minimum_width
    			minimum_height_assigned: minimum_height = a_minimum_height
    			minimum_height_set_by_user_set: minimum_height_set_by_user
    			minimum_width_set_by_user_set: minimum_width_set_by_user

    	set_minimum_width (a_minimum_width: INTEGER_32)
    			-- Assign `a_minimum_width' in pixels to minimum_width.
    			-- If width is less than `a_minimum_width', resize.
    			-- From now, minimum_width is fixed and will not be changed
    			-- dynamically by the application anymore.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			a_minimum_width_positive: a_minimum_width >= 0
    		ensure -- from EV_WIDGET
    			minimum_width_assigned: minimum_width = a_minimum_width
    			minimum_width_set_by_user_set: minimum_width_set_by_user

    	set_pointer_style (a_cursor: like pointer_style)
    			-- Assign `a_cursor' to pointer_style.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed
    			a_cursor_not_void: a_cursor /= Void
    		ensure -- from EV_WIDGET
    			pointer_style_assigned: pointer_style.is_equal (a_cursor)

    	set_tile (a_pixmap: EV_PIXMAP)
    			-- Set tile used to fill figures.
    			-- Set to Void to use background_color to fill.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_pixmap_not_void: a_pixmap /= Void
    		ensure -- from EV_DRAWABLE
    			tile_assigned: tile /= Void

    	set_tooltip (a_tooltip: STRING_GENERAL)
    			-- Assign `a_tooltip' to tooltip.
    			-- (from EV_TOOLTIPABLE)
    		require -- from EV_TOOLTIPABLE
    			not_destroyed: not is_destroyed
    			tooltip: a_tooltip /= Void
    		ensure -- from EV_TOOLTIPABLE
    			tooltip_assigned: tooltip.is_equal (a_tooltip)
    			cloned: tooltip /= a_tooltip

    feature -- Duplication

    	copy (other: like Current)
    			-- Update current object using fields of object attached
    			-- to `other', so as to yield equal objects.
    			-- (from EV_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)

    	sub_pixmap (area: EV_RECTANGLE): EV_PIXMAP
    			-- Return a pixmap region of `Current' represented by rectangle `area'
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			area_not_void: area /= Void
    		ensure -- from EV_DRAWABLE
    			result_not_void: Result /= Void

    	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

    	clear_and_redraw
    			-- Clear the window.
    			-- Call expose_actions for `Current' when next idle.
    		require
    			not_destroyed: not is_destroyed

    	clear_and_redraw_rectangle (a_x, a_y, a_width, a_height: INTEGER_32)
    			-- Clear rectangle described with upper-left corner on (`a_x', `a_y')
    			-- with size `a_width' and `a_height'.
    			-- Call expose_actions for rectangle when next idle.
    		require
    			not_destroyed: not is_destroyed

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

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

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

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

    	flush
    			-- Execute any delayed calls to expose_actions without waiting
    			-- for next idle. Delayed calls to expose_actions happen as a
    			-- result of calling on of redraw, clear_and_redraw,
    			-- redraw_rectangle or `clear_and_redraw_rectngle'.
    			-- Call this feature to make the effects of one or more previous
    			-- calls to these features immediately visible.
    		require
    			not_destroyed: not is_destroyed

    	redraw
    			-- Call expose_actions for `Current' when next idle.
    		require
    			not_destroyed: not is_destroyed

    	redraw_rectangle (a_x, a_y, a_width, a_height: INTEGER_32)
    			-- Call expose_actions for rectangle described with upper-left
    			-- corner on (`a_x', `a_y') with size `a_width' and `a_height' when next idle.
    		require
    			not_destroyed: not is_destroyed

    	refresh_now
    			-- Force an immediate redraw of `Current'.
    			-- (from EV_WIDGET)
    		require -- from EV_WIDGET
    			not_destroyed: not is_destroyed

    feature -- Clearing operations

    	clear
    			-- Erase `Current' with background_color.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed

    	clear_rectangle (x, y, a_width, a_height: INTEGER_32)
    			-- Draw rectangle with upper-left corner on (`x', `y')
    			-- with size `a_width' and `a_height' in background_color.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_width_positive_or_zero: a_width >= 0
    			a_height_positive_or_zero: a_height >= 0

    feature -- Command

    	destroy
    			-- Destroy underlying native toolkit object.
    			-- Render `Current' unusable.
    			-- (from EV_ANY)
    		ensure -- from EV_ANY
    			is_destroyed: is_destroyed

    feature {ANY} -- Contract support

    	valid_drawing_mode (a_mode: INTEGER_32): BOOLEAN
    			-- Is `a_mode' a valid drawing mode?
    			-- (from EV_DRAWABLE_CONSTANTS)

    feature -- Contract support

    	parent_of_source_allows_docking: BOOLEAN
    			-- Does parent of source to be transported
    			-- allow current to be dragged out? (See real_source)
    			-- Not all Vision2 containers are currently supported by this
    			-- mechanism, only descendents of EV_DOCKABLE_TARGET
    			-- are supported.
    			-- (from EV_DOCKABLE_SOURCE)

    	source_has_current_recursive (source: EV_DOCKABLE_SOURCE): BOOLEAN
    			-- Does `source' recursively contain `Current'?
    			-- As seen by parenting structure.
    			-- (from EV_DOCKABLE_SOURCE)
    		require -- from EV_DOCKABLE_SOURCE
    			not_destroyed: not is_destroyed
    			source_not_void: source /= Void

    feature -- Drawing mode setting

    	set_and_mode
    			-- Set drawing_mode to bitwise AND.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			drawing_mode_assigned: drawing_mode = drawing_mode_and

    	set_copy_mode
    			-- Set drawing_mode to normal.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			drawing_mode_assigned: drawing_mode = drawing_mode_copy

    	set_invert_mode
    			-- Set drawing_mode to bitwise invert.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			drawing_mode_assigned: drawing_mode = drawing_mode_invert

    	set_or_mode
    			-- Set drawing_mode to bitwise OR.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			drawing_mode_assigned: drawing_mode = drawing_mode_or

    	set_xor_mode
    			-- Set drawing_mode to bitwise XOR.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		ensure -- from EV_DRAWABLE
    			drawing_mode_assigned: drawing_mode = drawing_mode_xor

    feature -- Drawing operations

    	draw_arc (x, y, a_bounding_width, a_bounding_height: INTEGER_32; a_start_angle, an_aperture: REAL_32)
    			-- Draw part of an ellipse defined by a rectangular area with an
    			-- upper left corner at `x',`y', width `a_bounding_width' and height
    			-- `a_bounding_height'.
    			-- Start at `a_start_angle' and stop at `a_start_angle' + `an_aperture'.
    			-- Angles are measured in radians, and go
    			-- counterclockwise from the 3 o'clock angle.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_bounding_width_positive_or_zero: a_bounding_width >= 0
    			a_bounding_height_positive_or_zero: a_bounding_width >= 0

    	draw_ellipse (x, y, a_bounding_width, a_bounding_height: INTEGER_32)
    			-- Draw an ellipse defined by a rectangular area with an
    			-- upper left corner at `x',`y', width `a_bounding_width' and height
    			-- `a_bounding_height'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_bounding_width_positive_or_zero: a_bounding_width >= 0
    			a_bounding_height_positive_or_zero: a_bounding_height >= 0

    	draw_ellipsed_text (x, y: INTEGER_32; a_text: STRING_GENERAL; clipping_width: INTEGER_32)
    			-- Draw `a_text' with left of baseline at (`x', `y') using font.
    			-- Text is clipped to `clipping_width' in pixels and ellipses are displayed
    			-- to show truncated characters if any.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_text_not_void: a_text /= Void
    			clipping_width_positive: clipping_width >= 0

    	draw_ellipsed_text_top_left (x, y: INTEGER_32; a_text: STRING_GENERAL; clipping_width: INTEGER_32)
    			-- Draw `a_text' with top left corner at (`x', `y') using font.
    			-- Text is clipped to `clipping_width' in pixels and ellipses are displayed
    			-- to show truncated characters if any.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_text_not_void: a_text /= Void
    			clipping_width_positive: clipping_width >= 0

    	draw_pie_slice (x, y, a_bounding_width, a_bounding_height: INTEGER_32; a_start_angle, an_aperture: REAL_32)
    			-- Draw part of an ellipse defined by a rectangular area with an
    			-- upper left corner at `x',`y', width `a_bounding_width' and height
    			-- `a_bounding_height'.
    			-- Start at `a_start_angle' and stop at `a_start_angle' + `an_aperture'.
    			-- The arc is then closed by two segments through (`x', 'y').
    			-- Angles are measured in radians, start at the
    			-- 3 o'clock angle and grow counterclockwise.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_bounding_width_positive_or_zero: a_bounding_width >= 0
    			a_bounding_height_positive_or_zero: a_bounding_height >= 0

    	draw_pixmap (x, y: INTEGER_32; a_pixmap: EV_PIXMAP)
    			-- Draw `a_pixmap' with upper-left corner on (`x', `y').
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_pixmap_not_void: a_pixmap /= Void

    	draw_point (x, y: INTEGER_32)
    			-- Draw point at (`x', `y').
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed

    	draw_polyline (points: ARRAY [EV_COORDINATE]; is_closed: BOOLEAN)
    			-- Draw line segments between subsequent points in
    			-- `points'. If `is_closed' draw line segment between first
    			-- and last point in `points'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			points_not_void: points /= Void

    	draw_rectangle (x, y, a_width, a_height: INTEGER_32)
    			-- Draw rectangle with upper-left corner on (`x', `y')
    			-- with size `a_width' and `a_height'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_width_positive_or_zero: a_width >= 0
    			a_height_positive_or_zero: a_height >= 0

    	draw_segment (x1, y1, x2, y2: INTEGER_32)
    			-- Draw line segment from (`x1', `y1') to (`x2', `y2').
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed

    	draw_straight_line (x1, y1, x2, y2: INTEGER_32)
    			-- Draw infinite straight line through (`x1', `y1') and
    			-- (`x2', `y2').
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			points_not_equal: x1 /= x2 or y1 /= y2

    	draw_sub_pixmap (x, y: INTEGER_32; a_pixmap: EV_PIXMAP; area: EV_RECTANGLE)
    			-- Draw `area' of `a_pixmap' with upper-left corner on (`x', `y').
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_pixmap_not_void: a_pixmap /= Void
    			area_not_void: area /= Void

    	draw_text (x, y: INTEGER_32; a_text: STRING_GENERAL)
    			-- Draw `a_text' with left of baseline at (`x', `y') using font.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_text_not_void: a_text /= Void

    	draw_text_top_left (x, y: INTEGER_32; a_text: STRING_GENERAL)
    			-- Draw `a_text' with top left corner at (`x', `y') using font.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_text_not_void: a_text /= Void

    feature -- Drawing operations (filled)

    	fill_ellipse (x, y, a_bounding_width, a_bounding_height: INTEGER_32)
    			-- Fill an ellipse defined by a rectangular area with an
    			-- upper left corner at `x',`y', width `a_bounding_width' and height
    			-- `a_bounding_height'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_bounding_width_positive_or_zero: a_bounding_width >= 0
    			a_bounding_height_positive_or_zero: a_bounding_height >= 0

    	fill_pie_slice (x, y, a_bounding_width, a_bounding_height: INTEGER_32; a_start_angle, an_aperture: REAL_32)
    			-- Fill part of an ellipse defined by a rectangular area with an
    			-- upper left corner at `x',`y', width `a_bounding_width' and height
    			-- `a_bounding_height'.
    			-- Start at `a_start_angle' and stop at `a_start_angle' + `an_aperture'.
    			-- The arc is then closed by two segments through (`x', `y').
    			-- Angles are measured in radians, start at the 3
    			-- o'clock angle and grow counterclockwise.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_bounding_width_positive_or_zero: a_bounding_width >= 0
    			a_bounding_height_positive_or_zero: a_bounding_height >= 0

    	fill_polygon (points: ARRAY [EV_COORDINATE])
    			-- Draw filled polygon between subsequent points in `points'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			points_not_void: points /= Void

    	fill_rectangle (x, y, a_width, a_height: INTEGER_32)
    			-- Draw filled rectangle with upper-left corner on (`x', `y')
    			-- with size `a_width' and `a_height'.
    			-- (from EV_DRAWABLE)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    			a_width_positive_or_zero: a_width >= 0
    			a_height_positive_or_zero: a_height >= 0

    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)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES
    			not_void: Result /= Void

    	dock_started_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when a dockable source is dragged.
    			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES)
    		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES
    			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)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES
    			not_void: Result /= Void

    	expose_actions: EV_GEOMETRY_ACTION_SEQUENCE
    			-- Actions to be performed when an area needs to be redrawn.
    			-- (from EV_DRAWING_AREA_ACTION_SEQUENCES)
    		ensure -- from EV_DRAWING_AREA_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES
    			not_void: Result /= Void

    	pick_ended_actions: EV_PND_FINISHED_ACTION_SEQUENCE
    			-- Actions to be performed when a transport from `Current' ends.
    			-- If transport completed successfully, then event data
    			-- is target. If cancelled, then event data is Void.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES)
    		ensure -- from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			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)
    		require -- from  EV_ABSTRACT_PICK_AND_DROPABLE
    			True
    		ensure -- from EV_WIDGET_ACTION_SEQUENCES
    			not_void: Result /= Void

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

    feature -- Measurement

    	height: INTEGER_32
    			-- Vertical size in pixels.
    			-- Same as minimum_height when not displayed.
    			-- (from EV_POSITIONED)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		require -- from EV_POSITIONED
    			not_destroyed: not is_destroyed
    		ensure -- from EV_POSITIONED
    			bridge_ok: Result = implementation.height

    	minimum_height: INTEGER_32
    			-- Lower bound on height in pixels.
    			-- (from EV_POSITIONED)
    		require -- from EV_POSITIONED
    			not_destroyed: not is_destroyed
    		ensure -- from EV_POSITIONED
    			bridge_ok: Result = implementation.minimum_height
    			positive_or_zero: Result >= 0

    	minimum_width: INTEGER_32
    			-- Lower bound on width in pixels.
    			-- (from EV_POSITIONED)
    		require -- from EV_POSITIONED
    			not_destroyed: not is_destroyed
    		ensure -- from EV_POSITIONED
    			bridge_ok: Result = implementation.minimum_width
    			positive_or_zero: Result >= 0

    	width: INTEGER_32
    			-- Horizontal size in pixels.
    			-- Same as minimum_width when not displayed.
    			-- (from EV_POSITIONED)
    		require -- from EV_DRAWABLE
    			not_destroyed: not is_destroyed
    		require -- from EV_POSITIONED
    			not_destroyed: not is_destroyed
    		ensure -- from EV_POSITIONED
    			bridge_ok: Result = implementation.width

    	x_position: INTEGER_32
    			-- Horizontal offset relative to parent x_position in pixels.
    			-- (from EV_POSITIONED)
    		require -- from EV_POSITIONED
    			not_destroyed: not is_destroyed
    		ensure -- from EV_POSITIONED
    			bridge_ok: Result = implementation.x_position

    	y_position: INTEGER_32
    			-- Vertical offset relative to parent y_position in pixels.
    			-- (from EV_POSITIONED)
    		require -- from EV_POSITIONED
    			not_destroyed: not is_destroyed
    		ensure -- from EV_POSITIONED
    			bridge_ok: Result = implementation.y_position

    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 -- Status Report

    	is_destroyed: BOOLEAN
    			-- Is `Current' no longer usable?
    			-- (from EV_ANY)
    		ensure -- from EV_ANY
    			bridge_ok: Result = implementation.is_destroyed

    invariant
    		-- from EV_DRAWABLE
    	line_width_positive_or_zero: is_usable implies line_width >= 0
    	drawing_mode_valid: is_usable implies valid_drawing_mode (drawing_mode)

    		-- from EV_COLORIZABLE
    	background_color_not_void: is_usable implies background_color /= Void
    	foreground_color_not_void: is_usable implies foreground_color /= Void

    		-- from EV_ANY
    	is_initialized: is_initialized
    	is_coupled: implementation /= Void and then implementation.interface = Current
    	default_create_called: default_create_called

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

    		-- from EV_WIDGET
    	pointer_position_not_void: is_usable and is_show_requested implies pointer_position /= Void
    	is_displayed_implies_show_requested: is_usable and then is_displayed implies is_show_requested
    	parent_contains_current: is_usable and then parent /= Void implies parent.has (Current)

    		-- from EV_PICK_AND_DROPABLE
    	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

    		-- from EV_DOCKABLE_SOURCE
    	parent_permits_docking: is_dockable implies parent_of_source_allows_docking

    		-- from EV_POSITIONED
    	width_not_negative: is_usable implies width >= 0
    	height_not_negative: is_usable implies height >= 0
    	minimum_width_not_negative: is_usable implies minimum_width >= 0
    	minimum_height_not_negative: is_usable implies minimum_height >= 0

    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_DRAWING_AREA