    indexing
    	description: "EiffelVision pixmap. Mswindows implementation for drawable pixmap (drawable, not self-displayable)"
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date$"
    	revision: "$Revision$"

    class interface
    	EV_PIXMAP_IMP_DRAWABLE

    create
    	make_with_simple (other: EV_PIXMAP_IMP)
    			-- Create the current implementation using `other's
    			-- attributes.

    feature -- Access

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

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

    	arc_cosine (v: REAL_32): REAL_32
    			-- Trigonometric arccosine of `v'
    			-- (from SINGLE_MATH)

    	arc_sine (v: REAL_32): REAL_32
    			-- Trigonometric arcsine of `v'
    			-- (from SINGLE_MATH)

    	arc_tangent (v: REAL_32): REAL_32
    			-- Trigonometric arctangent of `v'
    			-- (from SINGLE_MATH)

    	background_color: EV_COLOR
    			-- Color used to fill figures.
    			-- (from EV_DRAWABLE_IMP)

    	blue: INTEGER_32
    			-- Intensity value for the blue component
    			-- (from WEL_COLOR_REF)

    	ceiling (v: REAL_32): REAL_32
    			-- Least integral value greater than or equal to `v'
    			-- (from SINGLE_MATH)

    	check_instruction: INTEGER_32 is 7
    			-- Exception code for violated check
    			-- (from EXCEP_CONST)

    	class_invariant: INTEGER_32 is 6
    			-- Exception code for violated class invariant
    			-- (from EXCEP_CONST)

    	clip_area: EV_RECTANGLE
    			-- Clip area used to clip drawing.
    			-- If set to Void, no clipping is applied.
    			-- (from EV_DRAWABLE_IMP)

    	com_exception: INTEGER_32 is 28
    			-- Exception code for a COM error.
    			-- (from EXCEP_CONST)

    	cosine (v: REAL_32): REAL_32
    			-- Trigonometric cosine of radian `v' approximated
    			-- in the range [-pi/4, +pi/4]
    			-- (from SINGLE_MATH)

    	create_on_deferred: INTEGER_32 is 17
    			-- Create on deferred
    			-- (from EXCEP_CONST)

    	cursor: WEL_CURSOR
    			-- Current cursor used.

    	dashed_line_style: BOOLEAN
    			-- Are lines drawn dashed?
    			-- (from EV_DRAWABLE_IMP)

    	dc: WEL_MEMORY_DC
    			-- The device context corresponding to the image

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

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

    	developer_exception: INTEGER_32 is 24
    			-- Exception code for developer exception
    			-- (from EXCEP_CONST)

    	dollar_applied_to_melted_feature: INTEGER_32 is 26
    			-- $ applied to melted feature
    			-- (from EXCEP_CONST)

    	drawing_mode: INTEGER_32
    			-- Logical operation on pixels when drawing.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True

    	eiffel_runtime_fatal_error: INTEGER_32 is 25
    			-- Eiffel run-time fatal error
    			-- (from EXCEP_CONST)

    	eiffel_runtime_panic: INTEGER_32 is 13
    			-- Eiffel run-time panic
    			-- (from EXCEP_CONST)

    	euler: REAL_64 is 2.7182818284590452354
    			-- Logarithm base
    			-- (from MATH_CONST)

    	exception_in_signal_handler: INTEGER_32 is 20
    			-- Exception in signal handler
    			-- (from EXCEP_CONST)

    	external_exception: INTEGER_32 is 18
    			-- Exception code for operating system error
    			-- which does not set the `errno' variable
    			-- (Unix-specific)
    			-- (from EXCEP_CONST)

    	floating_point_exception: INTEGER_32 is 5
    			-- Exception code for floating point exception
    			-- (from EXCEP_CONST)

    	floor (v: REAL_32): REAL_32
    			-- Greatest integral value less than or equal to `v'
    			-- (from SINGLE_MATH)

    	font: EV_FONT
    			-- Font of `Current'.
    			-- (from EV_FONTABLE_IMP)
    		require -- from  EV_FONTABLE_I
    			True
    		ensure -- from EV_FONTABLE_I
    			not_void: Result /= Void

    	foreground_color: EV_COLOR
    			-- Color used for lines and text.
    			-- (from EV_DRAWABLE_IMP)

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

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

    	get_bitmap: WEL_BITMAP
    			-- Current bitmap used. Void if not initialized, not
    			-- Void otherwise (see Invariant at the end of class).
    			--
    			-- Call `WEL_BITMAP.decrement_reference' when you don't
    			-- need it anymore.
    		ensure -- from EV_PIXMAP_IMP_STATE
    			result_not_void: Result /= Void

    	get_mask_bitmap: WEL_BITMAP
    			-- Monochrome bitmap used as mask. Void if none.
    			--
    			-- Call `WEL_BITMAP.decrement_reference' when you don't
    			-- need it anymore.
    		require -- from EV_PIXMAP_IMP_STATE
    			mask_in_use: has_mask
    		ensure -- from EV_PIXMAP_IMP_STATE
    			result_not_void: Result /= Void

    	green: INTEGER_32
    			-- Intensity value for the green component
    			-- (from WEL_COLOR_REF)

    	has_mask: BOOLEAN
    			-- Has the current pixmap a mask?
    		ensure -- from EV_PIXMAP_IMP_STATE
    			has_mask_implies_mask_bitmap_not_void: Result implies get_mask_bitmap /= Void

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

    	icon: WEL_ICON
    			-- Current icon used.

    	incorrect_inspect_value: INTEGER_32 is 9
    			-- Exception code for inspect value which is not one
    			-- of the inspect constants, if there is no Else_part
    			-- (from EXCEP_CONST)

    	internal_font: EV_FONT
    			-- Font of `Current' for internal queries.
    			-- Faster than calling font as we do not need to
    			-- create a new EV_FONT every time.
    			-- (from EV_FONTABLE_IMP)

    	internal_font_height: INTEGER_32
    			-- Height required to correctly display font of `Current' in pixels.
    			-- (from EV_FONTABLE_IMP)
    		ensure -- from EV_FONTABLE_IMP
    			result_non_negative: Result >= 0

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

    	io_exception: INTEGER_32 is 21
    			-- Exception code for I/O error
    			-- (from EXCEP_CONST)

    	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: INTEGER_32
    			-- The Current color.
    			-- (from WEL_COLOR_REF)

    	line_width: INTEGER_32
    			-- Line thickness.
    			-- (from EV_DRAWABLE_IMP)

    	log (v: REAL_32): REAL_32
    			-- Natural logarithm of `v'
    			-- (from SINGLE_MATH)
    		require -- from SINGLE_MATH
    			v > 0.0

    	log10 (v: REAL_32): REAL_32
    			-- Base 10 logarithm of `v'
    			-- (from SINGLE_MATH)
    		require -- from SINGLE_MATH
    			v > 0.0

    	log_2 (v: REAL_32): REAL_32
    			-- Base 2 logarithm of `v'
    			-- (from SINGLE_MATH)
    		require -- from SINGLE_MATH
    			v > 0.0

    	loop_invariant: INTEGER_32 is 11
    			-- Exception code for violated loop invariant
    			-- (from EXCEP_CONST)

    	loop_variant: INTEGER_32 is 10
    			-- Exception code for non-decreased loop variant
    			-- (from EXCEP_CONST)

    	mask_dc: WEL_MEMORY_DC
    			-- The device context corresponding to the mask

    	no_more_memory: INTEGER_32 is 2
    			-- Exception code for failed memory allocation
    			-- (from EXCEP_CONST)

    	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)

    	number_of_codes: INTEGER_32 is 29
    			-- How many codes are there to represent exceptions?
    			-- (from EXCEP_CONST)

    	operating_system_exception: INTEGER_32 is 22
    			-- Exception code for operating system error
    			-- which sets the `errno' variable
    			-- (Unix-specific)
    			-- (from EXCEP_CONST)

    	original_parent_position: INTEGER_32
    			-- Original position in parent. Required
    			-- to restore widget later.
    			-- (from EV_DOCKABLE_SOURCE_I)

    	out_of_memory: INTEGER_32 is 15
    			-- Out of memory (cannot be ignored)
    			-- (from EXCEP_CONST)

    	palette: WEL_PALETTE
    			-- Current palette used. Void if none.

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

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

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

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

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

    	pi: REAL_64 is 3.14159265358979323846
    			-- (from MATH_CONST)

    	postcondition: INTEGER_32 is 4
    			-- Exception code for violated postcondition
    			-- (from EXCEP_CONST)

    	precondition: INTEGER_32 is 3
    			-- Exception code for violated precondition
    			-- (from EXCEP_CONST)

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

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

    	red: INTEGER_32
    			-- Intensity value for the red component
    			-- (from WEL_COLOR_REF)

    	rescue_exception: INTEGER_32 is 14
    			-- Exception code for exception in rescue clause
    			-- (from EXCEP_CONST)

    	resumption_failed: INTEGER_32 is 16
    			-- Resumption failed (retry did not succeed)
    			-- (from EXCEP_CONST)

    	retrieve_exception: INTEGER_32 is 23
    			-- Exception code for retrieval error
    			-- may be raised by `retrieved' in `IO_MEDIUM'.
    			-- (from EXCEP_CONST)

    	routine_failure: INTEGER_32 is 8
    			-- Exception code for failed routine
    			-- (from EXCEP_CONST)

    	runtime_check_exception: INTEGER_32 is 29
    			-- Exception code for runtime check being violated.
    			-- (from EXCEP_CONST)

    	runtime_io_exception: INTEGER_32 is 27
    			-- Exception code for I/O error raised by runtime functions
    			-- such as store/retrieve, file access...
    			-- (from EXCEP_CONST)

    	signal_exception: INTEGER_32 is 12
    			-- Exception code for operating system signal
    			-- (from EXCEP_CONST)

    	sine (v: REAL_32): REAL_32
    			-- Trigonometric sine of radian `v' approximated
    			-- in range [-pi/4, +pi/4]
    			-- (from SINGLE_MATH)

    	sqrt (v: REAL_32): REAL_32
    			-- Square root of `v'
    			-- (from SINGLE_MATH)
    		require -- from SINGLE_MATH
    			v >= 0.0

    	sqrt2: REAL_64 is 1.41421356237309504880
    			-- Square root of 2
    			-- (from MATH_CONST)

    	sub_pixmap (area: EV_RECTANGLE): EV_PIXMAP
    			-- Return the subpixmap of `Current' described by rectangle `area'.
    		require -- from EV_DRAWABLE_I
    			area_not_void: area /= Void
    		ensure -- from EV_DRAWABLE_I
    			result_not_void: Result /= Void

    	tangent (v: REAL_32): REAL_32
    			-- Trigonometric tangent of radian `v' approximated
    			-- in range [-pi/4, +pi/4]
    			-- (from SINGLE_MATH)

    	tile: EV_PIXMAP
    			-- Pixmap that is used to instead of background_color.
    			-- If set to Void, background_color is used to fill.
    			-- (from EV_DRAWABLE_IMP)

    	transparent_color: EV_COLOR
    			-- Color used as transparent (Void by default).

    	valid_code (c: INTEGER_32): BOOLEAN
    			-- Is `c' a valid code to represent some kind of exceptions?
    			-- (from EXCEP_CONST)

    	void_assigned_to_expanded: INTEGER_32 is 19
    			-- Exception code for assignment of void value
    			-- to expanded entity
    			-- (from EXCEP_CONST)

    	void_call_target: INTEGER_32 is 1
    			-- Exception code for feature applied to void reference
    			-- (from EXCEP_CONST)

    feature -- Measurement

    	height: INTEGER_32
    			-- Height of `Current'.

    	width: INTEGER_32
    			-- Width of `Current'.

    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

    	assertion_violation: BOOLEAN
    			-- Is last exception originally due to a violated
    			-- assertion or non-decreasing variant?
    			-- (from EXCEPTIONS)

    	exception_class_name: STRING_8
    			-- Name of the class that includes the recipient
    			-- of original form of last exception
    			-- (from EXCEPTIONS)

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

    	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

    	developer_exception_name: STRING_8
    			-- Name of last developer-raised exception
    			-- (from EXCEPTIONS)
    		require -- from EXCEPTIONS
    			applicable: is_developer_exception

    	exception: INTEGER_32
    			-- Code of last exception that occurred
    			-- (from EXCEPTIONS)

    	exception_trace: STRING_8
    			-- String representation of the exception trace
    			-- (from EXCEPTIONS)

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

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

    	is_developer_exception: BOOLEAN
    			-- Is the last exception originally due to
    			-- a developer exception?
    			-- (from EXCEPTIONS)

    	is_developer_exception_of_name (name: STRING_8): BOOLEAN
    			-- Is the last exception originally due to a developer
    			-- exception of name `name'?
    			-- (from EXCEPTIONS)

    	is_signal: BOOLEAN
    			-- Is last exception originally due to an external
    			-- event (operating system signal)?
    			-- (from EXCEPTIONS)

    	is_system_exception: BOOLEAN
    			-- Is last exception originally due to an
    			-- external event (operating system error)?
    			-- (from EXCEPTIONS)

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

    	meaning (except: INTEGER_32): STRING_8
    			-- A message in English describing what `except' is
    			-- (from EXCEPTIONS)

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

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

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

    	original_class_name: STRING_8
    			-- Name of the class that includes the recipient
    			-- of original form of last exception
    			-- (from EXCEPTIONS)

    	original_exception: INTEGER_32
    			-- Original code of last exception that triggered
    			-- current exception
    			-- (from EXCEPTIONS)

    	original_recipient_name: STRING_8
    			-- Name of the routine whose execution was
    			-- interrupted by original form of last exception
    			-- (from EXCEPTIONS)

    	original_tag_name: STRING_8
    			-- Assertion tag for original form of last
    			-- assertion violation.
    			-- (from EXCEPTIONS)

    	recipient_name: STRING_8
    			-- Name of the routine whose execution was
    			-- interrupted by last exception
    			-- (from EXCEPTIONS)

    	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))

    	tag_name: STRING_8
    			-- Tag of last violated assertion clause
    			-- (from EXCEPTIONS)

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

    feature {ANY} -- Status report

    	valid_color_constant (c: INTEGER_32): BOOLEAN
    			-- Is `c' a valid color constant?
    			-- (from WEL_COLOR_CONSTANTS)

    feature -- Status setting

    	catch (code: INTEGER_32)
    			-- Make sure that any exception of code `code' will be
    			-- caught. This is the default.
    			-- (from EXCEPTIONS)

    	die (code: INTEGER_32)
    			-- Terminate execution with exit status `code',
    			-- without triggering an exception.
    			-- (from EXCEPTIONS)

    	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)

    	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)

    	ignore (code: INTEGER_32)
    			-- Make sure that any exception of code `code' will be
    			-- ignored. This is not the default.
    			-- (from EXCEPTIONS)

    	message_on_failure
    			-- Print an exception history table
    			-- in case of failure.
    			-- This is the default.
    			-- (from EXCEPTIONS)

    	no_message_on_failure
    			-- Do not print an exception history table
    			-- in case of failure.
    			-- (from EXCEPTIONS)

    	exception_raise (name: STRING_8)
    			-- Raise a developer exception of name `name'.
    			-- (from EXCEPTIONS)

    	raise_retrieval_exception (name: STRING_8)
    			-- Raise a retrieval exception of name `name'.
    			-- (from EXCEPTIONS)

    	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_for_buffering (a_width, a_height: INTEGER_32)
    			-- Resets the size of the pixmap without keeping original image or clearing background.
    		require -- from EV_PIXMAP_I
    			width_valid: a_width > 0
    			height_valid: a_height > 0

    	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_default_font
    			-- Make system to use default font.
    			-- (from EV_FONTABLE_IMP)

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

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

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

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

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

    	set_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_size (new_width, new_height: INTEGER_32)
    			-- Resize the current bitmap. If the new size
    			-- is smaller than the old one, the bitmap is
    			-- clipped.
    		require -- from EV_PIXMAP_I
    			x_coordinate_valid: new_width > 0
    			y_coordinate_valid: new_height > 0

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

    	stretch (new_width, new_height: INTEGER_32)
    			-- Stretch the image to fit in size
    			-- `new_width' by `new_height'.
    		require -- from EV_PIXMAP_I
    			x_coordinate_valid: new_width > 0
    			y_coordinate_valid: new_height > 0

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

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

    feature -- Element change

    	disable_dashed_line_style
    			-- Draw lines solid.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True
    		ensure -- from EV_DRAWABLE_I
    			dashed_line_style_disabled: is_usable implies not interface.dashed_line_style

    	enable_dashed_line_style
    			-- Draw lines dashed.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True
    		ensure -- from EV_DRAWABLE_I
    			dashed_line_style_enabled: is_usable implies interface.dashed_line_style

    	remove_clipping
    			-- Do not apply any clipping.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True
    		ensure -- from EV_DRAWABLE_I
    			clip_area_void: is_usable implies interface.clip_area = 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

    	remove_tile
    			-- Do not apply a tile when filling.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True
    		ensure -- from EV_DRAWABLE_I
    			tile_void: is_usable implies interface.tile = Void

    	set_background_color (a_color: EV_COLOR)
    			-- Assign `a_color' to background_color.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_COLORIZABLE_I
    			a_color_not_void: a_color /= Void
    		ensure -- from EV_COLORIZABLE_I
    			background_color_assigned: is_initialized implies interface.implementation.background_color.is_equal (a_color)

    	set_blue (a_blue: INTEGER_32)
    			-- Set blue with `a_blue'
    			-- (from WEL_COLOR_REF)
    		require -- from WEL_COLOR_REF
    			valid_blue_inf: a_blue >= 0
    			valid_blue_sup: a_blue <= 255
    		ensure -- from WEL_COLOR_REF
    			blue_set: blue = a_blue

    	set_clip_area (an_area: EV_RECTANGLE)
    			-- Set an area to clip to.
    			-- Set to Void when no clipping should be applied.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			an_area_not_void: an_area /= Void
    		ensure -- from EV_DRAWABLE_I
    			clip_area_assigned: is_usable implies interface.clip_area.is_equal (an_area)

    	set_clip_region (a_region: EV_REGION)
    			-- Set an area to clip to.
    			-- Set to Void when no clipping should be applied.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			a_region_not_void: a_region /= Void

    	set_color (color: INTEGER_32)
    			-- Set item with `color'.
    			-- (from WEL_COLOR_REF)
    		ensure -- from WEL_COLOR_REF
    			color_set: item = color

    	set_drawing_mode (a_mode: INTEGER_32)
    			-- Set drawing mode to `a_mode'.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			a_mode_valid: valid_drawing_mode (a_mode)
    		ensure -- from EV_DRAWABLE_I
    			drawing_mode_assigned: is_usable implies interface.drawing_mode = a_mode

    	set_font (a_font: EV_FONT)
    			-- Set font to `a_font'.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_FONTABLE_I
    			a_font_not_void: a_font /= Void
    		ensure -- from EV_FONTABLE_I
    			assigned: is_usable implies font.is_equal (a_font)

    	set_foreground_color (a_color: EV_COLOR)
    			-- Assign `a_color' to foreground_color
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_COLORIZABLE_I
    			a_color_not_void: a_color /= Void
    		ensure -- from EV_COLORIZABLE_I
    			foreground_color_assigned: is_initialized implies interface.implementation.foreground_color.is_equal (a_color)

    	set_green (a_green: INTEGER_32)
    			-- Set green with `a_green'
    			-- (from WEL_COLOR_REF)
    		require -- from WEL_COLOR_REF
    			valid_green_inf: a_green >= 0
    			valid_green_sup: a_green <= 255
    		ensure -- from WEL_COLOR_REF
    			green_set: green = a_green

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

    	set_line_width (a_width: INTEGER_32)
    			-- Assign `a_width' to line_width.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			a_width_positive_or_zero: a_width >= 0
    		ensure -- from EV_DRAWABLE_I
    			line_width_assigned: is_usable implies interface.line_width = a_width

    	set_mask (a_mask: EV_BITMAP)
    			-- Set bitmap mask of `Current' to `a_mask'.
    		require -- from EV_PIXMAP_I
    			mask_not_void: a_mask /= Void
    			mask_same_dimensions: a_mask.width = width and then a_mask.height = height

    	set_red (a_red: INTEGER_32)
    			-- Set red with `a_red'
    			-- (from WEL_COLOR_REF)
    		require -- from WEL_COLOR_REF
    			valid_red_inf: a_red >= 0
    			valid_red_sup: a_red <= 255
    		ensure -- from WEL_COLOR_REF
    			red_set: red = a_red

    	set_rgb (a_red, a_green, a_blue: INTEGER_32)
    			-- Set red, green, blue with
    			-- `a_red', `a_green', `a_blue'
    			-- (from WEL_COLOR_REF)
    		require -- from WEL_COLOR_REF
    			valid_red_inf: a_red >= 0
    			valid_red_sup: a_red <= 255
    			valid_green_inf: a_green >= 0
    			valid_green_sup: a_green <= 255
    			valid_blue_inf: a_blue >= 0
    			valid_blue_sup: a_blue <= 255
    		ensure -- from WEL_COLOR_REF
    			red_set: red = a_red
    			green_set: green = a_green
    			blue_set: blue = a_blue

    	set_tile (a_pixmap: EV_PIXMAP)
    			-- Set tile used to fill figures.
    			-- Set to Void to use background_color to fill.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			a_pixmap_not_void: a_pixmap /= Void
    		ensure -- from EV_DRAWABLE_I
    			tile_assigned: is_usable implies interface.tile /= Void

    	set_transparent_color (value: EV_COLOR)
    			-- Make `value' the new transparent color.

    feature -- Duplication

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

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

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

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

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

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

    feature -- Basic operations

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

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

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

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

    	default_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.
    			-- (from EV_PIXMAP_I)

    feature -- Inapplicable

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

    feature -- Access EV_DRAGABLE_SOURCE.

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

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

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

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

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

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

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

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

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

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

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

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

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

    feature -- Access EV_PICK_AND_DROPABLE.

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

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

    	default_pixmaps: EV_STOCK_PIXMAPS
    			-- Default pixmaps
    			-- (from EV_SHARED_TRANSPORT_I)

    	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 -- Clearing and drawing operations

    	clear
    			-- Erase `Current' with background_color.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True

    	clear_rectangle (x1, y1, 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_IMP)
    		require -- from  EV_DRAWABLE_I
    			True

    feature -- Constants

    	drawing_mode_and: INTEGER_32 is 3
    			-- Drawing mode where bitwise AND is performed when a
    			-- pixel is drawn.
    			--
    			-- T\S | 0 | 1 |
    			-- -------------
    			--   0 | 0 | 0 |
    			-- -------------
    			--   1 | 0 | 1 |
    			-- (from EV_DRAWABLE_CONSTANTS)

    	drawing_mode_copy: INTEGER_32 is 0
    			-- Normal drawing mode.
    			--
    			-- T\S | 0 | 1 |
    			-- -------------
    			--   0 | 0 | 1 |
    			-- -------------
    			--   1 | 0 | 1 |
    			-- (from EV_DRAWABLE_CONSTANTS)

    	drawing_mode_invert: INTEGER_32 is 2
    			-- Drawing mode where bits are inverted before drawn.
    			--
    			-- T\S | 0 | 1 |
    			-- -------------
    			--   0 | 1 | 0 |
    			-- -------------
    			--   1 | 1 | 0 |
    			-- (from EV_DRAWABLE_CONSTANTS)

    	drawing_mode_or: INTEGER_32 is 4
    			-- Drawing mode where bitwise OR is performed when a
    			-- pixel is drawn.
    			--
    			-- T\S | 0 | 1 |
    			-- -------------
    			--   0 | 0 | 1 |
    			-- -------------
    			--   1 | 1 | 1 |
    			-- (from EV_DRAWABLE_CONSTANTS)

    	drawing_mode_xor: INTEGER_32 is 1
    			-- Drawing mode where bitwise XOR is performed when a
    			-- pixel is drawn.
    			--
    			-- T\S | 0 | 1 |
    			-- -------------
    			--   0 | 0 | 1 |
    			-- -------------
    			--   1 | 1 | 0 |
    			-- (from EV_DRAWABLE_CONSTANTS)

    feature -- Contract support

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

    feature -- Delegated features

    	disable_capture
    			-- Ungrab the user input.

    	disable_sensitive
    			-- Disable sensitivity to user input events.

    	disable_transport
    			-- Deactivate pick/drag and drop mechanism.
    		ensure -- from EV_PICK_AND_DROPABLE_I
    			is_transport_disabled: not is_transport_enabled

    	draw_rubber_band
    			-- Erase previously drawn rubber band.
    			-- Draw a rubber band between initial pick point and cursor.

    	enable_capture
    			-- Grab the user input.

    	enable_sensitive
    			-- Enable sensitivity to user input events.

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

    	end_transport (a_x: INTEGER_32; a_y: INTEGER_32; a_button: INTEGER_32; a_x_tilt, a_y_tilt, a_pressure: REAL_64; a_screen_x, a_screen_y: INTEGER_32)
    			-- Terminate the pick and drop mechanism.

    	erase_rubber_band
    			-- Erase previously drawn rubber band.

    	has_capture: BOOLEAN
    			-- Does widget have capture?

    	has_focus: BOOLEAN
    			-- Does widget have the keyboard focus?

    	has_parent: BOOLEAN

    	hide
    			-- Request that `Current' not be displayed when its parent is.

    	internal_disable_dockable
    			-- Platform specific implementation of `disable_drag'.
    			-- Does nothing in this implementation.

    	internal_enable_dockable
    			-- Platform specific implementation of `enable_drag'.
    			-- Does nothing in this implementation.

    	internal_set_pointer_style (c: EV_POINTER_STYLE)
    			-- Assign `c' to cursor pixmap.
    			-- Only called from implementation.

    	is_displayed: BOOLEAN
    			-- Is `Current' visible on the screen?
    			-- False if `Current' is entirely obscured by another window.

    	is_sensitive: BOOLEAN
    			-- Does `Current' respond to user input events.

    	is_show_requested: BOOLEAN
    			-- Will `Current' be displayed when its parent is?
    			-- See also is_displayed.

    	minimum_height: INTEGER_32
    			-- Minimum vertical size in pixels of `Current'.

    	minimum_width: INTEGER_32
    			-- Minimum horizontal size in pixels `Current'.

    	on_parented
    			-- `Current' has just been added to a container
    		require -- from EV_WIDGET_I
    			parent_void: parent = Void
    		ensure -- from EV_WIDGET_I
    			parent_void: parent = Void

    	parent: EV_CONTAINER
    			-- Container widget that contains `Current'.
    			-- (Void if `Current' is not in a container)

    	parent_is_sensitive: BOOLEAN

    	pnd_screen: EV_SCREEN
    			-- `Result' is screen used for pick and drop.

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

    	pointer_style: EV_POINTER_STYLE
    			-- Cursor displayed when screen pointer is over `Current'.

    	real_pointed_target: EV_PICK_AND_DROPABLE
    			-- Target at mouse position

    	redraw
    			-- Force `Current' to redraw itself.

    	screen_x: INTEGER_32
    			-- Horizontal offset relative to screen in pixels.
    		require -- from  EV_POSITIONED_I
    			True

    	screen_y: INTEGER_32
    			-- Vertical offset relative to screen in pixels.
    		require -- from  EV_POSITIONED_I
    			True

    	set_actual_drop_target_agent (an_agent: like actual_drop_target_agent)
    			-- Assign `an_agent' to actual_drop_target_agent.
    		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_focus
    			-- Grab keyboard focus.

    	set_minimum_height (a_minimum_height: INTEGER_32)
    			-- Set the minimum vertical size to `a_minimum_height' in pixels.
    		require -- from EV_WIDGET_I
    			a_minimum_height_positive: a_minimum_height >= 0
    		ensure -- from EV_WIDGET_I
    			minimum_height_assigned: is_usable implies interface.minimum_height = a_minimum_height

    	set_minimum_size (a_minimum_width: INTEGER_32; a_minimum_height: INTEGER_32)
    			-- Set the minimum horizontal size to `a_minimum_width' in pixels.
    			-- Set the minimum vertical size to `a_minimum_height' in pixels.
    		require -- from EV_WIDGET_I
    			a_minimum_width_positive: a_minimum_width >= 0
    			a_minimum_height_positive: a_minimum_height >= 0
    		ensure -- from EV_WIDGET_I
    			minimum_width_assigned: is_usable implies interface.minimum_width = a_minimum_width
    			minimum_height_assigned: is_usable implies interface.minimum_height = a_minimum_height

    	set_minimum_width (a_minimum_width: INTEGER_32)
    			-- Set the minimum horizontal size to `a_minimum_width' in pixels.
    		require -- from EV_WIDGET_I
    			a_minimum_width_positive: a_minimum_width >= 0
    		ensure -- from EV_WIDGET_I
    			minimum_width_assigned: is_usable implies interface.minimum_width = a_minimum_width

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

    	set_pointer_style (c: EV_POINTER_STYLE)
    			-- Set `c' as new cursor pixmap.
    			-- Can be called through interface.

    	set_tooltip (a_text: STRING_GENERAL)
    			-- Set the minimum horizontal size to `a_minimum_width' in pixels.
    		require -- from EV_TOOLTIPABLE_I
    			a_tooltip_not_void: a_text /= Void

    	show
    			-- Request that `Current' be displayed when its parent is.

    	start_transport (a_x: INTEGER_32; a_y: INTEGER_32; a_button: INTEGER_32; a_x_tilt: REAL_64; a_y_tilt: REAL_64; a_pressure: REAL_64; a_screen_x: INTEGER_32; a_screen_y: INTEGER_32)
    			-- Start a pick and drop transport.

    	tooltip: STRING_32
    			-- Text displayed when user moves mouse over widget.

    	update_buttons (a_parent: EV_TOOL_BAR; start_index, end_index: INTEGER_32)
    			-- Ensure that buttons from `start_index' to `end_index' in `a_parent' are
    			-- refreshed. This is called at the end of  a dockable transport from a tool bar button
    			-- as on some platforms, they end up in an invalid state, and need refreshing.
    		require -- from EV_DOCKABLE_SOURCE_I
    			start_index_valid: start_index >= 1
    			end_index_valid: end_index <= a_parent.count

    	widget_imp_at_pointer_position: EV_WIDGET_IMP
    			-- `Result' is widget implementation at current
    			-- cursor position.

    	x_position: INTEGER_32
    			-- Horizontal offset relative to parent x_position in pixels.

    	y_position: INTEGER_32
    			-- Vertical offset relative to parent y_position in pixels.

    feature -- Drawing operations

    	bounding_area: EV_RECTANGLE
    			-- Temporary rectangle used internally.
    			-- (from EV_DRAWABLE_IMP)

    	draw_arc (x, y: INTEGER_32; 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_IMP)
    		require -- from EV_DRAWABLE_I
    			a_bounding_width_positive_or_zero: a_bounding_width >= 0
    			a_bounding_width_positive_or_zero: a_bounding_height >= 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_IMP)
    		require -- from EV_DRAWABLE_I
    			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_IMP)
    		require -- from EV_DRAWABLE_I
    			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_IMP)
    		require -- from EV_DRAWABLE_I
    			a_text_not_void: a_text /= Void
    			clipping_width_positive: clipping_width >= 0

    	draw_pie_slice (x, y: INTEGER_32; 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_IMP)
    		require -- from EV_DRAWABLE_I
    			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_IMP)
    		require -- from EV_DRAWABLE_I
    			a_pixmap_not_void: a_pixmap /= Void

    	draw_point (x, y: INTEGER_32)
    			-- Draw point at (`x', `y').
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True

    	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_IMP)
    		require -- from EV_DRAWABLE_I
    			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_IMP)
    		require -- from EV_DRAWABLE_I
    			a_width_positive_or_zero: a_width >= 0
    			a_height_positive_or_zero: a_height >= 0

    	draw_rotated_text (x, y: INTEGER_32; a_angle: REAL_32; a_text: STRING_GENERAL)
    			-- Draw rotated text `a_text' with left of baseline at (`x', `y') using font.
    			-- Rotation is number of radians counter-clockwise from horizontal plane.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			a_text_not_void: a_text /= Void

    	draw_segment (x1, y1, x2, y2: INTEGER_32)
    			-- Draw line segment from (`x1', 'y1') to (`x2', 'y2').
    			-- (from EV_DRAWABLE_IMP)
    		require -- from  EV_DRAWABLE_I
    			True

    	draw_straight_line (x1, y1, x2, y2: INTEGER_32)
    			-- Draw infinite straight line through (`x1','y1') and (`x2','y2').
    			-- (from EV_DRAWABLE_I)

    	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_IMP)
    		require -- from EV_DRAWABLE_I
    			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_IMP)
    		require -- from EV_DRAWABLE_I
    			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_IMP)
    		require -- from EV_DRAWABLE_I
    			a_text_not_void: a_text /= Void

    	internal_draw_text (x, y: INTEGER_32; angle: REAL_32; clipping_width: INTEGER_32; from_baseline: BOOLEAN; a_text: STRING_GENERAL)
    			-- 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.
    			-- Text is rotated counter-clockwise from the horizontal axis `degrees' degrees.
    			-- (from EV_DRAWABLE_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

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

    	create_drop_actions: EV_PND_ACTION_SEQUENCE
    			-- Create a drop action sequence.
    			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
    			True

    	create_expose_actions: EV_GEOMETRY_ACTION_SEQUENCE
    			-- Create a expose action sequence.
    			-- (from EV_PIXMAP_ACTION_SEQUENCES_IMP)
    		require -- from  EV_PIXMAP_ACTION_SEQUENCES_I
    			True

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

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

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

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

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

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

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

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

    	create_pointer_button_press_actions: EV_POINTER_BUTTON_ACTION_SEQUENCE
    			-- Create a pointer_button_press action sequence.
    			-- (from EV_WIDGET_ACTION_SEQUENCES_IMP)
    		require -- from  EV_WIDGET_ACTION_SEQUENCES_I
    			True

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

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

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

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

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

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

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

    	dock_started_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when pebble is picked up.
    			-- (from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I)
    		ensure -- from EV_DOCKABLE_SOURCE_ACTION_SEQUENCES_I
    			not_void: Result /= Void

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

    	expose_actions: EV_GEOMETRY_ACTION_SEQUENCE
    			-- Actions to be performed when an area needs to be redrawn.
    			-- (from EV_PIXMAP_ACTION_SEQUENCES_I)
    		ensure -- from EV_PIXMAP_ACTION_SEQUENCES_I
    			not_void: Result /= Void

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

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

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

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

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

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

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

    	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

    	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 -- Filling operations

    	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_IMP)
    		require -- from EV_DRAWABLE_I
    			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: INTEGER_32; 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_IMP)
    		require -- from EV_DRAWABLE_I
    			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 line segments between subsequent points in `points'.
    			-- Fill all enclosed area's with foreground_color.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			points_not_void: points /= Void

    	fill_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'. Fill with foreground_color.
    			-- (from EV_DRAWABLE_IMP)
    		require -- from EV_DRAWABLE_I
    			a_width_positive_or_zero: a_width >= 0
    			a_height_positive_or_zero: a_height >= 0

    feature -- Misc.

    	build_cursor: WEL_CURSOR
    			-- Build a WEL_CURSOR from `bitmap' and `mask_bitmap'.
    			-- (from EV_PIXMAP_IMP_STATE)
    		ensure -- from EV_PIXMAP_IMP_STATE
    			result_not_void: Result /= Void

    	build_icon: WEL_ICON
    			-- Build a WEL_ICON from `bitmap' and `mask_bitmap'.
    			-- (from EV_PIXMAP_IMP_STATE)
    		ensure -- from EV_PIXMAP_IMP_STATE
    			result_not_void: Result /= Void

    	gdi_compact
    			-- Spare GDI resource by freeing icons, cursors, ... that
    			-- can be reloaded from file.
    			-- (from EV_PIXMAP_IMP_STATE)

    	raw_image_data: EV_RAW_IMAGE_DATA
    			-- RGBA representation of `Current'.
    			-- (from EV_PIXMAP_IMP_STATE)
    		require -- from  EV_PIXMAP_I
    			True

    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 -- Saving

    	save_to_named_file (a_format: EV_GRAPHICAL_FORMAT; a_filename: FILE_NAME)
    			-- Save `Current' to `a_filename' in `a_format' format.
    			-- (from EV_PIXMAP_IMP_STATE)
    		require -- from EV_PIXMAP_I
    			a_format_not_void: a_format /= Void
    			a_filename_not_void: a_filename /= Void
    			a_filename_valid: a_filename.is_valid
    		require -- from EV_PIXMAP_IMP_STATE
    			a_format_not_void: a_format /= Void
    			a_filename_not_void: a_filename /= Void
    			a_filename_valid: a_filename.is_valid

    feature --EV_ANY_I -- Implementation

    	get_dc
    			-- Get dc.
    			-- By default does nothing, but is
    			-- redefined by primitives that do not keep a consistent
    			-- dc. Example : EV_DRAWING_AREA_IMP
    			-- (from EV_DRAWABLE_IMP)

    	release_dc
    			-- Release dc.
    			-- By default does nothing, but is
    			-- redefined by primitives that do not keep a consistent
    			-- dc. Example : EV_DRAWING_AREA_IMP
    			-- (from EV_DRAWABLE_IMP)

    invariant
    	bitmap_not_void: is_initialized implies internal_bitmap /= Void
    	bitmap_reference_tracked: internal_bitmap /= Void implies internal_bitmap.reference_tracked
    	palette_reference_tracked: palette /= Void implies palette.reference_tracked
    	mask_bitmap_reference_tracked: internal_mask_bitmap /= Void implies internal_mask_bitmap.reference_tracked
    	dc_reference_tracked: dc /= Void implies dc.reference_tracked
    	mask_dc_reference_tracked: mask_dc /= Void implies mask_dc.reference_tracked

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

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

    		-- from EV_WIDGET_I
    	is_displayed_implies_show_requested: is_usable and is_displayed implies is_show_requested

    		-- from EV_PICK_AND_DROPABLE_I
    	user_interface_modes_mutually_exclusive: mode_is_pick_and_drop.to_integer + mode_is_drag_and_drop.to_integer + mode_is_target_menu.to_integer = 1
    	pebble_function_takes_two_integer_open_operands: pebble_function /= Void implies pebble_function.valid_operands ([1, 1])

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

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

    		-- from WEL_COLOR_REF
    	valid_red_inf: red >= 0
    	valid_red_sup: red <= 255
    	valid_green_inf: green >= 0
    	valid_green_sup: green <= 255
    	valid_blue_inf: blue >= 0
    	valid_blue_sup: blue <= 255

    		-- from EV_DRAWABLE_IMP
    	reference_tracked_on_brush: internal_brush /= Void implies internal_brush.reference_tracked
    	brush_exists: internal_brush /= Void implies internal_brush.exists
    	reference_tracked_on_pen: internal_pen /= Void implies internal_pen.reference_tracked

    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_PIXMAP_IMP_DRAWABLE