note description: "[ EiffelVision tree. ]" legal: "See notice at end of class." status: "See notice at end of class." keywords: "tree, container" date: "$Date$" revision: "$Revision$" class EV_TREE inherit EV_PRIMITIVE undefine is_equal redefine implementation, is_in_default_state end EV_TREE_NODE_LIST redefine is_in_default_state, implementation end EV_ITEM_PIXMAP_SCALER undefine is_equal redefine implementation, is_in_default_state end EV_TREE_ACTION_SEQUENCES -- FIXME: comment it until Linux's version implemented -- EV_SCROLLABLE_ACTION_SEQUENCES -- undefine -- is_equal -- redefine -- implementation -- end create default_create feature -- Access selected_item: detachable EV_TREE_NODE -- Currently selected item at any level -- within tree hierarchy. require not_destroyed: not is_destroyed do Result := implementation.selected_item ensure bridge_ok: Result = implementation.selected_item end feature -- Status report ensure_item_visible (an_item: EV_TREE_NODE) -- Ensure `an_item' is visible in `Current'. -- Tree nodes may be expanded to achieve this. require not_destroyed: not is_destroyed is_displayed: is_displayed item_contained: has_recursively (an_item) do implementation.ensure_item_visible (an_item) end selected: BOOLEAN -- Is an item selected in `Current' ? obsolete "Use selected_item /= Void instead. [2017-05-31]" require not_destroyed: not is_destroyed do Result := implementation.selected end feature -- Contract support is_parent_recursive (a_tree_node: EV_TREE_NODE): BOOLEAN -- Is `a_tree_node' a parent of `Current'? do -- As we cannot insert a EV_TREE into a EV_TREE_NODE, -- it cannot be True. Result := False end feature {NONE} -- Contract support is_in_default_state: BOOLEAN -- Is `Current' in its default state? do Result := Precursor {EV_PRIMITIVE} and Precursor {EV_TREE_NODE_LIST} end feature {EV_ANY, EV_ANY_I} -- Implementation implementation: EV_TREE_I -- Responsible for interaction with native graphics toolkit. feature {NONE} -- Implementation create_implementation -- See `{EV_ANY}.create_implementation'. do create {EV_TREE_IMP} implementation.make end note copyright: "Copyright (c) 1984-2014, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., 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_TREE