indexing
	description: "Eiffel Vision item. Mswindows implementation."
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2006-01-22 18:25:44 -0800 (Sun, 22 Jan 2006) $"
	revision: "$Revision: 56675 $"

deferred class interface
	EV_ITEM_IMP

feature -- Access

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

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

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

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

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

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

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

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

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

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

	original_x: INTEGER_32
			-- (from EV_SHARED_TRANSPORT_IMP)

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

	original_y: INTEGER_32
			-- (from EV_SHARED_TRANSPORT_IMP)

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

	parent: EV_ITEM_LIST [EV_ITEM]
			-- Item list containing `Current'.
			-- (from EV_ITEM_I)

	parent_imp: EV_ITEM_LIST_I [EV_ITEM]
			-- Parent implementation of `Current'.
			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)
		require -- from  EV_ITEM_I
			True

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

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

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

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

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

	pixmap: EV_PIXMAP
			-- Give a copy of pixmap used by `Current'.
			-- (from EV_PIXMAPABLE_IMP)
		require -- from  EV_PIXMAPABLE_I
			True

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

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

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

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

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

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

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

	set_pnd_original_parent
			-- Assign parent_imp to pnd_original_parent.
			-- (from EV_PICK_AND_DROPABLE_ITEM_IMP)

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

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

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

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

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

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

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

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

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

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

	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)

	same_type (other: ANY): BOOLEAN
			-- Is type of current object identical to type of `other'?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			definition: Result = (conforms_to (other) and other.conforms_to (Current))

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

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

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

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

	destroy
			-- Destroy the current item.
		ensure -- from EV_ANY_I
			is_in_destroy_set: is_in_destroy
			is_destroyed_set: is_destroyed

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

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

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

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

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

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

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

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

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

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

	set_parent_imp (a_parent_imp: like parent_imp)
			-- Assign `a_parent_imp' to parent_imp.
		ensure
			assigned: parent_imp = a_parent_imp

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

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

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

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

	set_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
	
feature -- Element change

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

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

	set_pixmap (pix: EV_PIXMAP)
			-- Make `pix' the new pixmap of `Current'.
			-- (from EV_PIXMAPABLE_IMP)
		require -- from EV_PIXMAPABLE_I
			pixmap_not_void: pix /= Void
	
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

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

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

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

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

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

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

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

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

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

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

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

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

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

	show_cursor
			-- Show the cursor.
			-- (from WEL_WINDOWS_ROUTINES)
	
feature -- Access EV_DRAGABLE_SOURCE.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	pointer_x: INTEGER_16
			-- (from EV_SHARED_TRANSPORT_I)

	pointer_y: INTEGER_16
			-- (from EV_SHARED_TRANSPORT_I)
	
feature -- 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_pick_actions: EV_PND_START_ACTION_SEQUENCE
			-- Create a pick action sequence.
			-- (from EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_IMP)
		require -- from  EV_PICK_AND_DROPABLE_ACTION_SEQUENCES_I
			True

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

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

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

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

	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

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

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

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

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

	pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer moves.
			-- (from EV_ITEM_ACTION_SEQUENCES_I)
		ensure -- from EV_ITEM_ACTION_SEQUENCES_I
			not_void: Result /= Void
	
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)
	
invariant
		-- from EV_PICK_AND_DROPABLE_I
	user_interface_modes_mutually_exclusive: mode_is_pick_and_drop.to_integer + mode_is_drag_and_drop.to_integer + mode_is_target_menu.to_integer = 1
	pebble_function_takes_two_integer_open_operands: pebble_function /= Void implies pebble_function.valid_operands ([1, 1])

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

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

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_ITEM_IMP