    indexing
    	description: "EiffelVision color selection dialog.Mswindows implementation."
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date: 2006-03-22 23:29:03 -0800 (Wed, 22 Mar 2006) $"
    	revision: "$Revision: 57641 $"

    class interface
    	EV_COLOR_DIALOG_IMP

    create
    	make (an_interface: like interface)
    			-- Create `Current' with interface `an_interface'.
    		require -- from EV_ANY_I
    			an_interface_not_void: an_interface /= Void
    		ensure -- from EV_ANY_I
    			interface_assigned: interface = an_interface
    			base_make_called: base_make_called

    feature -- Access

    	blocking_window: EV_WINDOW
    			-- Window this dialog is a transient for.
    			-- (from EV_STANDARD_DIALOG_IMP)

    	color: EV_COLOR
    			-- `Result' is color selected in `Current'.
    		ensure -- from EV_COLOR_DIALOG_I
    			result_not_void: Result /= Void

    	custom_colors: WEL_CUSTOM_COLORS
    			-- Custom colors chosen by the user
    			-- (from WEL_CHOOSE_COLOR_DIALOG)

    	flags: INTEGER_32
    			-- Dialog box creation flags.
    			-- Can be a combination of the values defined in
    			-- class WEL_CHOOSE_COLOR_CONSTANTS.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)

    	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)

    	item: POINTER
    			-- Generic Windows handle or structure pointer.
    			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
    			-- (from WEL_ANY)

    	rgb_result: WEL_COLOR_REF
    			-- Color selected by the user and default color
    			-- selected when the dialog box is created.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		require -- from WEL_CHOOSE_COLOR_DIALOG
    			selected: selected
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			result_not_void: Result /= Void

    	title: STRING_32

    feature -- Measurement

    	structure_size: INTEGER_32
    			-- Size to allocate (in bytes)
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		ensure -- from WEL_STRUCTURE
    			positive_result: Result > 0

    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))

    	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

    	exists: BOOLEAN
    			-- Does the item exist?
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			Result = (item /= default_pointer)

    	full_open_allowed: BOOLEAN
    			-- Is the define custom colors button enabled?
    			-- This button allows the user to create custom colors.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)

    	has_flag (a_flags: INTEGER_32): BOOLEAN
    			-- Is `a_flags' set in flags?
    			-- See class WEL_CHOOSE_COLOR_CONSTANTS for `a_flags'
    			-- values.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)

    	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))

    	selected: BOOLEAN
    			-- Has the user selected something (file, color, etc.)?
    			-- If True, the Ok button has been chosen. If False,
    			-- the Cancel button has been chosen.
    			-- (from WEL_STANDARD_DIALOG)

    	selected_button: STRING_32
    			-- Label of last clicked button.
    			-- (from EV_STANDARD_DIALOG_IMP)

    	shared: BOOLEAN
    			-- Is item shared by another object?
    			-- If False (by default), item will
    			-- be destroyed by destroy_item.
    			-- If True, item will not be destroyed.
    			-- (from WEL_ANY)

    feature -- Status setting

    	allow_full_open
    			-- Enable the define custom colors button,
    			-- allowing the user from creating custom colors.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			full_open_allowed: full_open_allowed

    	prevent_full_open
    			-- Disable the define custom colors button,
    			-- preventing the user from creating custom colors.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			full_open_prevented: not full_open_allowed

    	set_blocking_window (a_window: EV_WINDOW)
    			-- Set as transient for `a_window'.
    			-- (from EV_STANDARD_DIALOG_IMP)

    	set_shared
    			-- Set shared to True.
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			shared: shared

    	set_unshared
    			-- Set shared to False.
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			unshared: not shared

    	show_modal_to_window (a_window: EV_WINDOW)
    			-- Show the window and wait until the user closed it.
    			-- (from EV_STANDARD_DIALOG_IMP)
    		require -- from  EV_STANDARD_DIALOG_I
    			True

    feature -- Element change

    	add_flag (a_flags: INTEGER_32)
    			-- Add `a_flags' to flags.
    			-- See class WEL_CHOOSE_COLOR_CONSTANTS for `a_flags'
    			-- values.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			has_flag: has_flag (a_flags)

    	destroy
    			-- Destroy `Current'.
    		ensure -- from EV_ANY_I
    			is_in_destroy_set: is_in_destroy
    			is_destroyed_set: is_destroyed

    	remove_flag (a_flags: INTEGER_32)
    			-- Remove `a_flags' from flags.
    			-- See class WEL_CHOOSE_COLOR_CONSTANTS for `a_flags'
    			-- values.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			has_not_flag: not has_flag (a_flags)

    	set_color (a_color: EV_COLOR)
    			-- Select `a_color' in `Current'.
    		require -- from EV_COLOR_DIALOG_I
    			a_color_not_void: a_color /= Void

    	set_custom_colors (a_custom_colors: WEL_CUSTOM_COLORS)
    			-- Set custom_colors with `a_custom_colors'.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		require -- from WEL_CHOOSE_COLOR_DIALOG
    			a_custom_colors_not_void: a_custom_colors /= Void
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			custom_colors_set: custom_colors = a_custom_colors

    	set_flags (a_flags: INTEGER_32)
    			-- Set flags with `a_flags'.
    			-- See class WEL_CHOOSE_COLOR_CONSTANTS for `a_flags'
    			-- values.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			flags_set: flags = a_flags

    	set_item (an_item: POINTER)
    			-- Set item with `an_item'
    			-- (from WEL_ANY)
    		ensure -- from WEL_ANY
    			item_set: item = an_item

    	set_rgb_result (color: WEL_COLOR_REF)
    			-- Set rgb_result with color
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		require -- from WEL_CHOOSE_COLOR_DIALOG
    			color_not_void: color /= Void
    		ensure -- from WEL_CHOOSE_COLOR_DIALOG
    			color_set: rgb_result.item = (color.item)

    	set_title (new_title: STRING_32)
    			-- Assign `new_title' to title.

    feature -- Removal

    	dispose
    			-- Destroy the inner structure of `Current'.
    			--
    			-- This function should be called by the GC when the
    			-- object is collected or by the user if `Current' is
    			-- no more usefull.
    			-- (from WEL_ANY)

    feature -- Duplication

    	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

    	activate (a_parent: WEL_COMPOSITE_WINDOW)
    			-- Activate the dialog box (modal mode) with
    			-- `a_parent' as owner.
    			-- (from WEL_CHOOSE_COLOR_DIALOG)
    		require -- from WEL_STANDARD_DIALOG
    			a_parent_not_void: a_parent /= Void
    			a_parent_exists: a_parent.exists
    		require -- from  EV_STANDARD_DIALOG_IMP
    			True

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

    	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)

    	structure_initialize
    			-- Fill Current with zeros.
    			-- (from WEL_STRUCTURE)
    		require -- from WEL_STRUCTURE
    			exists: exists

    	initialize_with_character (a_character: CHARACTER_8)
    			-- Fill current with `a_character'.
    			-- (from WEL_STRUCTURE)
    		require -- from WEL_STRUCTURE
    			exists: exists

    	is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object considered
    			-- equal to current object?
    			-- (from WEL_STRUCTURE)
    		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

    	memory_copy (source_pointer: POINTER; length: INTEGER_32)
    			-- Copy `length' bytes from `source_pointer' to item.
    			-- (from WEL_STRUCTURE)
    		require -- from WEL_STRUCTURE
    			length_small_enough: length <= structure_size
    			length_large_enough: length > 0
    			exists: exists

    feature -- Event handling

    	cancel_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when user cancels.
    			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I)
    		ensure -- from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
    			not_void: Result /= Void

    	create_cancel_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a cancel action sequence.
    			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_IMP)
    		require -- from  EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
    			True

    	create_ok_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Create a ok action sequence.
    			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_IMP)
    		require -- from  EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
    			True

    	ok_actions: EV_NOTIFY_ACTION_SEQUENCE
    			-- Actions to be performed when user clicks OK.
    			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I)
    		ensure -- from EV_STANDARD_DIALOG_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_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_POSITIONED_I
    	minimum_width_positive_or_zero: is_usable implies minimum_width >= 0
    	minimum_height_positive_or_zero: is_usable implies minimum_height >= 0

    indexing
    	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
    	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
    	source: "[
    		Eiffel Software
    		356 Storke Road, Goleta, CA 93117 USA
    		Telephone 805-685-1006, Fax 805-685-6869
    		Website http://www.eiffel.com
    		Customer support http://support.eiffel.com
    	]"

    end -- class EV_COLOR_DIALOG_IMP