note
	description: "The 'Tree' tab in the notebook."
	legal: "See notice at end of class."
	status: "See notice at end of class."
	author: "Vincent Brendel"

class
	TREE_COMPONENT

create
	make

feature -- Initialization

	make(vw: VIEWER_WINDOW)
			-- Initialize on 'vw'.
		require
			not_void: vw /= Void
		local
			v: EV_VERTICAL_BOX
			com: EV_ROUTINE_COMMAND
		do
			viewer := vw
			create v.make(viewer.tabs)
			create tree.make(v)
			viewer.tabs.append_page(v,"Tree")
			create com.make(agent item_selected)
			tree.add_select_command(com, Void)
		end

feature -- Actions

	item_selected (args: EV_ARGUMENT; data: EV_EVENT_DATA)
			-- Called when the selected item changes in the tree.
		require
			selected: tree.selected
		local
			elem: TOPIC_TREE_ITEM
		do
			elem ?= tree.selected_item
			viewer.set_selected_topic(elem.topic)
		end

feature -- Access

	tree: EV_TREE
			-- The topic structure display component.

feature -- Implementation
	
	viewer: VIEWER_WINDOW
			-- The main window.

invariant
	TREE_COMPONENT_possible: tree /= Void and viewer /= Void

note
	copyright:	"Copyright (c) 1984-2006, 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 -- class TREE_COMPONENT