indexing
	description: "[
					EV_GRID Text label whose content may be interactively chosen by the user via a list.
		
					set_item_strings may be used to set the list items used in the choice list before the item is activated.
		
					By default a list containing the strings set from set_item_strings is displayed, allowing
					the user to change the text of `Current' by selecting an item within that list.
						
					The default behavior of the activation may be overriden using activate_actions or `item_activate_actions' (from
					EV_GRID).
	]"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2006-09-05 14:59:40 -0700 (Tue, 05 Sep 2006) $"
	revision: "$Revision: 63295 $"

class interface
	EV_GRID_CHOICE_ITEM

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

	make_with_text (a_text: STRING_GENERAL)
			-- Create `Current' and assign `a_text' to text
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			a_text_not_void: a_text /= Void
		ensure -- from EV_GRID_LABEL_ITEM
			text_set: (text.same_type (a_text) implies text = a_text) or else not text.same_type (a_text) implies text.is_equal (a_text)

feature -- Access

	background_color: EV_COLOR
			-- Color displayed behind foreground features.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed

	column: EV_GRID_COLUMN
			-- Column to which current item belongs.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			is_parented: is_parented
		ensure -- from EV_GRID_ITEM
			column_not_void: Result /= Void

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

	foreground_color: EV_COLOR
			-- Color of foreground features like text.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed

	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)

	height: INTEGER_32
			-- Height of `Current' in pixels.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
		ensure -- from EV_GRID_ITEM
			result_non_negative: Result >= 0

	horizontal_indent: INTEGER_32
			-- Horizontal distance in pixels from left edge of `Current' to left edge of column.
			-- This may not be set, but the value is determined by the current tree structure
			-- of parent and row.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
		ensure -- from EV_GRID_ITEM
			not_parent_tree_enabled_implies_result_zero: not parent.is_tree_enabled implies Result = 0
			parent_tree_enabled_implies_result_greater_or_equal_to_zero: parent.is_tree_enabled implies Result >= 0

	item_strings: INDEXABLE [STRING_GENERAL, INTEGER_32]
			-- Item strings used to make up combo box list.

	parent: EV_GRID
			-- Grid in which `Current' is contained if any.
			-- (from EV_GRID_ITEM)
		require -- from EV_CONTAINABLE
			not_destroyed: not is_destroyed

	required_width: INTEGER_32
			-- Width in pixels required to fully display contents, based
			-- on current settings.
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_ITEM
			result_non_negative: Result >= 0

	row: EV_GRID_ROW
			-- Row to which current item belongs.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
		ensure -- from EV_GRID_ITEM
			row_not_void: Result /= Void

	tooltip: STRING_32
			-- Tooltip displayed on `Current'.
			-- If `Result' is `Void' or `is_empty' then no tooltip is displayed.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed

	virtual_x_position: INTEGER_32
			-- Horizontal offset of `Current' in relation to the
			-- the virtual area of parent grid in pixels.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
		ensure -- from EV_GRID_ITEM
			valid_result: parent /= Void implies Result >= 0 and Result <= parent.virtual_width - column.width + horizontal_indent

	virtual_y_position: INTEGER_32
			-- Vertical offset of `Current' in relation to the
			-- the virtual area of parent grid in pixels.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
		ensure -- from EV_GRID_ITEM
			valid_result_when_parent_row_height_fixed: parent /= Void and then parent.is_row_height_fixed implies Result >= 0 and Result <= parent.virtual_height - parent.row_height
			valid_result_when_parent_row_height_not_fixed: parent /= Void and then not parent.is_row_height_fixed implies Result >= 0 and Result <= parent.virtual_height - row.height

	width: INTEGER_32
			-- Width of `Current' in pixels.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
		ensure -- from EV_GRID_ITEM
			result_non_negative: Result >= 0
	
feature -- Measurement

	bottom_border: INTEGER_32
			-- Spacing between the contents of `Current' and the bottom edge of `Current' in pixels.
			-- (from EV_GRID_LABEL_ITEM)

	left_border: INTEGER_32
			-- Spacing between the contents of `Current' and the left edge of `Current' in pixels.
			-- (from EV_GRID_LABEL_ITEM)

	right_border: INTEGER_32
			-- Spacing between the contents of `Current' and the right edge of `Current' in pixels.
			-- (from EV_GRID_LABEL_ITEM)

	spacing: INTEGER_32
			-- Spacing between text and pixmap in pixels.
			-- If both are not visible, this value does not affect appearance of `Current'.
			-- (from EV_GRID_LABEL_ITEM)

	text_height: INTEGER_32
			-- `Result' is height required to fully display text in `pixels'.
			-- This function is optimized internally by `Current' and is therefore
			-- faster than querying `font.string_size' directly.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			result_non_negative: Result >= 0

	text_width: INTEGER_32
			-- `Result' is width required to fully display text in `pixels'.
			-- This function is optimized internally by `Current' and is therefore
			-- faster than querying `font.string_size' directly.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			result_non_negative: Result >= 0

	top_border: INTEGER_32
			-- Spacing between the contents of `Current' and the top edge of `Current' in pixels.
			-- (from EV_GRID_LABEL_ITEM)
	
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

	font: EV_FONT
			-- Typeface appearance for `Current'.
			-- (from EV_GRID_LABEL_ITEM)

	is_bottom_aligned: BOOLEAN
			-- Is text of `Current' bottom aligned?
			-- Ignored during re-draw if layout_procedure /= Void.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	is_center_aligned: BOOLEAN
			-- Is text of `Current' center aligned?
			-- Ignored during re-draw if layout_procedure /= Void.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	is_full_select_enabled: BOOLEAN
			-- Does selection highlighting fill complete area of `Current'?
			-- If `False', highlighting is only applied to area of text.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	is_left_aligned: BOOLEAN
			-- Is text of `Current' left aligned?
			-- Ignored during re-draw if layout_procedure /= Void.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	is_parented: BOOLEAN
			-- Does current item belong to an EV_GRID?
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed

	is_right_aligned: BOOLEAN
			-- Is text of `Current' right aligned?
			-- Ignored during re-draw if layout_procedure /= Void.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	is_selectable: BOOLEAN
			-- May enable_select be called?
			-- (from EV_SELECTABLE)
		require -- from EV_SELECTABLE
			not_destroyed: not is_destroyed

	is_selected: BOOLEAN
			-- Is selected?
			-- (from EV_SELECTABLE)
		require -- from EV_SELECTABLE
			not_destroyed: not is_destroyed
		ensure -- from EV_SELECTABLE
			bridge_ok: is_selectable implies Result = implementation.is_selected

	is_top_aligned: BOOLEAN
			-- Is text of `Current' top aligned?
			-- Ignored during re-draw if layout_procedure /= Void.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	is_vertically_center_aligned: BOOLEAN
			-- Is text of `Current' vertically center aligned?
			-- Ignored during re-draw if layout_procedure /= Void.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed

	layout_procedure: PROCEDURE [ANY, TUPLE [EV_GRID_LABEL_ITEM, EV_GRID_LABEL_ITEM_LAYOUT]]
			-- Procedure which may be used to calculate the position of text and pixmap relative to `Current',
			-- ready for the drawing implementation.
			-- This procedure is fired each time that `Current' must be re-drawn and by filling the passed EV_GRID_LABEL_ITEM_LAYOUT object, the
			-- position relative to the top left of `Current' at which text and pixmap is to be drawn may be set explicitly.
			-- The properties set into EV_GRID_LABEL_ITEM override any other positional settings such as the text alignment within `Current'.
			-- Be sure to query the width and height of text from the label item directly via text_width and text_height as
			-- this is optimized and quicker than `font.string_size' for repeated calls.
			-- Arguments (from left to right):
			-- label_item: EV_GRID_LABEL_ITEM - `Current' to which the settings apply.
			-- label_item_layout: EV_GRID_LABEL_ITEM_LAYOUT - Object into which desired positioning information must be set.
			-- (from EV_GRID_LABEL_ITEM)

	pixmap: EV_PIXMAP
			-- Image displayed to left of text.
			-- (from EV_GRID_LABEL_ITEM)

	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))

	text: STRING_32
			-- Text displayed in `Current'.
			-- (from EV_GRID_LABEL_ITEM)
	
feature -- Status setting

	disable_select
			-- Deselect the object.
			-- (from EV_DESELECTABLE)
		require -- from EV_DESELECTABLE
			not_destroyed: not is_destroyed
		ensure -- from EV_DESELECTABLE
			unselected: not is_selected

	enable_select
			-- Make is_selected True.
			-- (from EV_SELECTABLE)
		require -- from EV_SELECTABLE
			not_destroyed: not is_destroyed
			is_selectable: is_selectable
		ensure -- from EV_SELECTABLE
			is_selected: is_selected

	ensure_visible
			-- Ensure `Current' is visible in viewable area of parent.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: parent /= Void
		ensure -- from EV_GRID_ITEM
			virtual_x_position_not_changed_if_indent_greater_or_equal_to_column_width: old (horizontal_indent > column.width) implies old virtual_x_position = virtual_x_position
			virtual_x_position_not_changed_if_item_already_visible: old (virtual_x_position >= parent.virtual_x_position) and old (virtual_x_position + width <= parent.virtual_x_position + parent.viewable_width) implies old (virtual_x_position = virtual_x_position)
			virtual_y_position_not_changed_if_item_already_visible: old (virtual_y_position >= parent.virtual_y_position) and old (virtual_y_position + height <= parent.virtual_y_position + parent.viewable_height) implies old (virtual_y_position = virtual_y_position)
			row_visible_when_heights_fixed_in_parent: parent.is_row_height_fixed implies row.virtual_y_position >= parent.virtual_y_position and virtual_y_position + parent.row_height <= parent.virtual_y_position + (parent.viewable_height).max (parent.row_height)
			row_visible_when_heights_not_fixed_in_parent: not parent.is_row_height_fixed implies row.virtual_y_position >= parent.virtual_y_position and virtual_y_position + row.height <= parent.virtual_y_position + (parent.viewable_height).max (row.height)
			virtual_x_position_visible_if_indent_less_than_column_width: horizontal_indent < column.width implies virtual_x_position >= parent.virtual_x_position and virtual_x_position + width <= parent.virtual_x_position + (parent.viewable_width).max (width)

	set_background_color (a_color: like background_color)
			-- Assign `a_color' to background_color.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_ITEM
			background_color_assigned: background_color = a_color

	set_foreground_color (a_color: like foreground_color)
			-- Assign `a_color' to foreground_color.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_ITEM
			foreground_color_assigned: foreground_color = a_color

	set_tooltip (a_tooltip: STRING_GENERAL)
			-- Assign `a_tooltip' to tooltip.
			-- pass `Void' to remove the tooltip.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_ITEM
			tooltip_reset: a_tooltip = Void implies tooltip = Void
			tooltip_set: a_tooltip /= Void implies ((tooltip.same_type (a_tooltip) implies tooltip = a_tooltip) or not tooltip.same_type (a_tooltip) implies tooltip.is_equal (a_tooltip))

	toggle
			-- Change is_selected.
			-- (from EV_DESELECTABLE)
		require -- from EV_DESELECTABLE
			not_is_destroyed: not is_destroyed
			can_be_selected: not is_selected implies is_selectable
		ensure -- from EV_DESELECTABLE
			is_selected_changed: is_selected /= old is_selected
	
feature -- Element change

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

	set_item_strings (a_string_array: like item_strings)
			-- Set each item in `Current' to the strings referenced in `a_string_array'.
		require
			a_string_array_not_void: a_string_array /= Void
		ensure
			item_strings_set: item_strings = a_string_array
	
feature -- Duplication

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

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

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

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

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

	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)
	
feature -- Actions

	activate
			-- Setup `Current' for interactive in-place editing of `Current'.
			-- Activation is usually achieved by connecting an agent  to
			-- {EV_GRID}.pointer_double_press_actions' that calls activate.
			-- Will call activate_action of `Current' to setup the in-place editing.
			-- The default behavior of the activation can be overriden in {EV_GRID}.item_activate_actions,
			-- this is useful for repositioning the popup window used editing `Current'.
			-- See {EV_GRID_EDITABLE_ITEM}.activate_action for an example of what happens on activation.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented

	redraw
			-- Force `Current' to be re-drawn when next idle.
			-- (from EV_GRID_ITEM)
		require -- from EV_GRID_ITEM
			not_destroyed: not is_destroyed
			parented: is_parented
	
feature -- Command

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

	activate_actions: ACTION_SEQUENCE [TUPLE [EV_POPUP_WINDOW]]
			-- Actions to be performed to override the default activate setup of `Current', see {EV_GRID_EDITABLE_ITEM}.activate_action.
			-- Useful for repositioning `popup_window', which will then be shown automatically by the grid.
			-- Arguments of TUPLE (with name for clarity):
			--
			-- popup_window: EV_POPUP_WINDOW -- The popup window used to interactively edit `activate_item', window has already been sized and positioned.
			-- (from EV_GRID_ITEM_ACTION_SEQUENCES)
		ensure -- from EV_GRID_ITEM_ACTION_SEQUENCES
			result_not_void: Result /= Void

	deactivate_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when `Current' has been deactivated.
			-- (from EV_GRID_ITEM_ACTION_SEQUENCES)
		ensure -- from EV_GRID_ITEM_ACTION_SEQUENCES
			result_not_void: Result /= Void

	deselect_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when `Current' is deselected.
			-- (from EV_GRID_ITEM_ACTION_SEQUENCES)
		ensure -- from EV_GRID_ITEM_ACTION_SEQUENCES
			result_not_void: Result /= Void

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

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

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

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

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

	pointer_leave_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer leaves widget.
			-- (from EV_GRID_ITEM_ACTION_SEQUENCES)
		ensure -- from EV_GRID_ITEM_ACTION_SEQUENCES
			not_void: Result /= Void

	pointer_motion_actions: EV_POINTER_MOTION_ACTION_SEQUENCE
			-- Actions to be performed when screen pointer moves.
			-- (from EV_GRID_ITEM_ACTION_SEQUENCES)
		ensure -- from EV_GRID_ITEM_ACTION_SEQUENCES
			not_void: Result /= Void

	select_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when `Current' is selected.
			-- (from EV_GRID_ITEM_ACTION_SEQUENCES)
		ensure -- from EV_GRID_ITEM_ACTION_SEQUENCES
			result_not_void: Result /= Void
	
feature -- Markers

	fixme (comment: STRING_8)
			-- Mark code that has to be "fixed" with `comment'.
			-- (from REFACTORING_HELPER)
		require -- from REFACTORING_HELPER
			comment_not_void: comment /= Void

	to_implement (comment: STRING_8)
			-- Mark code that has to be "implemented" with `comment'.
			-- (from REFACTORING_HELPER)
		require -- from REFACTORING_HELPER
			comment_not_void: comment /= Void

	to_implement_assertion (comment: STRING_8): BOOLEAN
			-- Mark assertion that has to be "implemented" with `comment'.
			-- (from REFACTORING_HELPER)
		require -- from REFACTORING_HELPER
			comment_not_void: comment /= 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)
	
feature -- Status Report

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

	align_text_bottom
			-- Display text bottom aligned.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			alignment_set: is_bottom_aligned

	align_text_center
			-- Display text centered.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			alignment_set: is_center_aligned

	align_text_left
			-- Display text left aligned.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			alignment_set: is_left_aligned

	align_text_right
			-- Display text right aligned.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			alignment_set: is_right_aligned

	align_text_top
			-- Display text top aligned.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			alignment_set: is_top_aligned

	align_text_vertically_center
			-- Display text centered vertically.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			alignment_set: is_vertically_center_aligned

	disable_full_select
			-- Ensure is_full_select_enabled is `False'.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			full_select_disabled: not is_full_select_enabled

	enable_full_select
			-- Ensure is_full_select_enabled is `True'.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			full_select_enabled: is_full_select_enabled

	remove_pixmap
			-- Remove image displayed on `Current'.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			pixmap_removed: pixmap = Void

	remove_text
			-- Make text `is_empty'.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
		ensure -- from EV_GRID_LABEL_ITEM
			text_empty: text.is_empty

	set_bottom_border (a_bottom_border: INTEGER_32)
			-- Assign `a_bottom_border' to bottom_border.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			a_bottom_border_non_negative: a_bottom_border >= 0
		ensure -- from EV_GRID_LABEL_ITEM
			bottom_border_set: bottom_border = a_bottom_border

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

	set_layout_procedure (a_layout_procedure: PROCEDURE [ANY, TUPLE [EV_GRID_LABEL_ITEM, EV_GRID_LABEL_ITEM_LAYOUT]])
			-- Assign `a_layout_procedure' to layout_procedure.
			-- (from EV_GRID_LABEL_ITEM)
		ensure -- from EV_GRID_LABEL_ITEM
			layout_procedure_set: layout_procedure = a_layout_procedure

	set_left_border (a_left_border: INTEGER_32)
			-- Assign `a_left_border' to left_border.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			a_left_border_non_negative: a_left_border >= 0
		ensure -- from EV_GRID_LABEL_ITEM
			left_border_set: left_border = a_left_border

	set_pixmap (a_pixmap: EV_PIXMAP)
			-- Display image of `a_pixmap' on `Current'.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			pixmap_not_void: a_pixmap /= Void
		ensure -- from EV_GRID_LABEL_ITEM
			pixmap_set: pixmap = a_pixmap

	set_right_border (a_right_border: INTEGER_32)
			-- Assign `a_right_border' to right_border.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			a_right_border_non_negative: a_right_border >= 0
		ensure -- from EV_GRID_LABEL_ITEM
			right_border_set: right_border = a_right_border

	set_spacing (a_spacing: INTEGER_32)
			-- Assign `a_spacing' to spacing.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			a_spacing_non_negative: a_spacing >= 0
		ensure -- from EV_GRID_LABEL_ITEM
			spacing_set: spacing = a_spacing

	set_text (a_text: STRING_GENERAL)
			-- Assign `a_text' to text.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			a_text_not_void: a_text /= Void
			no_carriage_returns: not a_text.has_code (('%R').natural_32_code)
		ensure -- from EV_GRID_LABEL_ITEM
			text_set: (text.same_type (a_text) implies text = a_text) or else not text.same_type (a_text) implies text.is_equal (a_text)

	set_top_border (a_top_border: INTEGER_32)
			-- Assign `a_top_border' to top_border.
			-- (from EV_GRID_LABEL_ITEM)
		require -- from EV_GRID_LABEL_ITEM
			not_destroyed: not is_destroyed
			a_top_border_non_negative: a_top_border >= 0
		ensure -- from EV_GRID_LABEL_ITEM
			top_border_set: top_border = a_top_border
	
invariant
	choice_list_parented_during_activation: choice_list /= Void implies choice_list.parent /= Void

		-- from EV_GRID_ITEM
	parented_implies_height_equals_row_height_or_parent_row_height: (parent /= Void and then not parent.is_row_height_fixed implies height = row.height) or (parent /= Void and then parent.is_row_height_fixed implies height = parent.row_height)
	parented_and_parent_has_no_tree_implies_width_equals_column_width: parent /= Void and then not parent.is_tree_enabled implies width = column.width
	parented_and_row_is_subrow_implies_width_equals_column_width_less_indent: parent /= Void and row.parent_row /= Void implies width = (column.width - horizontal_indent).max (0)

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

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

		-- from EV_DESELECTABLE
	not_selectable_therefore_not_selected: not is_selectable implies not is_selected

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_GRID_CHOICE_ITEM