note
	description: "[
		A shim, allowing a context stone to be pushed, for EiffelStudio tools, providing access to information required without having to actually initialize the tool.
	]"
	legal: "See notice at end of class."
	status: "See notice at end of class.";
	date: "$Date$";
	revision: "$Revision$"

deferred class
	ES_STONABLE_TOOL [G -> ES_DOCKABLE_STONABLE_TOOL_PANEL [EV_WIDGET]]

inherit
	ES_TOOL [G]

	ES_STONABLE
		undefine
			out
		redefine
			query_set_stone
		end

feature {ES_DOCKABLE_STONABLE_TOOL_PANEL} -- Access

	previous_stone: detachable STONE
			-- Previous stone of `stone', if any

feature {NONE} -- Basic operations

	query_set_stone (a_stone: detachable STONE): BOOLEAN
			-- <Precursor>
		do
			if is_tool_instantiated then
				Result := panel.query_set_stone (a_stone)
			else
				Result := Precursor (a_stone)
			end
		end

feature {NONE} -- Action handler

	on_stone_changed (a_old_stone: detachable like stone)
			-- <Precusor>
		do
			previous_stone := a_old_stone
			if is_tool_instantiated then
				panel.set_stone (stone)
			end
		ensure then
			previous_stone_set: is_tool_instantiated implies previous_stone = a_old_stone
		end

feature -- Synchronization

	synchronize
			-- <Precursor>
		do
			if is_tool_instantiated then
				panel.synchronize
			end
		end

;note
	copyright:	"Copyright (c) 1984-2007, Eiffel Software"
	license:	"GPL version 2 (see http://www.eiffel.com/licensing/gpl.txt)"
	licensing_options:	"http://www.eiffel.com/licensing"
	copying: "[
			This file is part of Eiffel Software's Eiffel Development Environment.
			
			Eiffel Software's Eiffel Development Environment is free
			software; you can redistribute it and/or modify it under
			the terms of the GNU General Public License as published
			by the Free Software Foundation, version 2 of the License
			(available at the URL listed under "license" above).
			
			Eiffel Software's Eiffel Development Environment is
			distributed in the hope that it will be useful,	but
			WITHOUT ANY WARRANTY; without even the implied warranty
			of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
			See the	GNU General Public License for more details.
			
			You should have received a copy of the GNU General Public
			License along with Eiffel Software's Eiffel Development
			Environment; if not, write to the Free Software Foundation,
			Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
		]"
	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