indexing
	description: "Allows persisting and retrieving combo content from and to registry"
	date: "$Date$"
	revision: "$Revision$"

class
	WIZARD_SAVED_SETTINGS

inherit
	WIZARD_REGISTRY_STORE
		export
			{NONE} all
		end

feature -- Access

	max_count: INTEGER is
			-- Maximum number of items to be saved per combo box
		do
			if internal_max_count = Void then
				create internal_max_count
				internal_max_count.set_item (Default_max_combo_count)
			end
			Result := internal_max_count.item
		ensure
			valid_count: Result > 0
		end

feature -- Element Change

	set_max_count (a_max_count: INTEGER) is
			-- Set `max_count' with `a_max_count'.
		require
			valid_max_count: a_max_count > 0
		do
			if internal_max_count = Void then
				create internal_max_count
			end
			internal_max_count.set_item (a_max_count)
		ensure
			max_count_set: max_count = a_max_count
		end
		
feature -- Basic Operations

	initialize_combo (a_combo: EV_COMBO_BOX; a_name: STRING) is
			-- Fill `a_combo' with saved values with key `a_name' if any.
			-- Will persist combo values in key with name `a_name'.
		require
			non_void_combo: a_combo /= Void
		local
			l_list: LIST [STRING]
		do
			a_combo.set_data (agent save_list (?, a_name))
			if is_saved_list (a_name) then
				l_list := saved_list (a_name)
				fill_combo (a_combo, l_list)
			end
		end

	add_combo_item (a_entry: STRING; a_combo: EV_COMBO_BOX) is
			-- Add entry `a_entry' to combo box `a_combo' if not there already.
			-- Persist combo box strings.
		local
			l_save_routine: ROUTINE [ANY, TUPLE [LIST [STRING]]]
			l_list: LIST [STRING]
			l_item: EV_LIST_ITEM
			l_entry: STRING
		do
			if not a_entry.is_empty then
				from
					create {ARRAYED_LIST [STRING]} l_list.make (a_combo.count)
					a_combo.start
				until
					a_combo.after
				loop
					l_list.extend (a_combo.item.text.as_lower)
					a_combo.forth
				end
				l_entry := a_entry.as_lower
				l_list.compare_objects
				if not l_list.has (l_entry) then
					if a_combo.count >= max_count then
						a_combo.finish
						a_combo.remove
					end
					create l_item.make_with_text (a_entry)
					a_combo.put_front (l_item)
				end
				l_save_routine ?= a_combo.data
				if l_save_routine /= Void then
					l_save_routine.call ([a_combo.strings])
				end
			end
		end

feature {NONE} -- Implementation

	fill_combo (a_combo: EV_COMBO_BOX; a_list: LIST [STRING]) is
			-- Fill `a_combo' with strings in `a_list'.
		require
			non_void_combo: a_combo /= Void
			non_void_list: a_list /= Void
		do
			a_combo.wipe_out
			if not a_list.is_empty then
				a_combo.select_actions.block
				from
					a_list.start
				until
					a_list.after
				loop
					a_combo.extend (create {EV_LIST_ITEM}.make_with_text (a_list.item))
					a_list.forth
				end
				a_combo.select_actions.resume
				a_combo.set_text (a_list.first)
			end
		end

feature {NONE} -- Private Access

	internal_max_count: INTEGER_REF
			-- Cell storing value for `max_count'

	Default_max_combo_count: INTEGER is 10
			-- Maximum combo entries

end -- class WIZARD_SAVED_SETTINGS

--+----------------------------------------------------------------
--| EiffelCOM Wizard
--| Copyright (C) 1999-2005 Eiffel Software. All rights reserved.
--| Eiffel Software Confidential
--| Duplication and distribution prohibited.
--|
--| Eiffel Software
--| 356 Storke Road, Goleta, CA 93117 USA
--| http://www.eiffel.com
--+----------------------------------------------------------------