indexing
	description: "Abstraction for objects that have a tooltip property."
	status: "See notice at end of class"
	keywords: "tooltip, popup, hint"
	date: "$Date$"
	revision: "$Revision$"

deferred class interface
	EV_TOOLTIPABLE

feature -- Access

	data: ANY
			-- Arbitrary user data may be stored here.
			-- (from EV_ANY)

	tooltip: STRING
			-- Tooltip displayed on Current.
		require
			not_destroyed: not is_destroyed
		ensure
			bridge_ok: (Result = void and implementation.tooltip = void) or Result.is_equal (implementation.tooltip)
	
feature -- Element change

	remove_tooltip
			-- Make tooltip Void.
		require
			not_destroyed: not is_destroyed
		ensure
			tooltip_removed: tooltip = void

	set_data (some_data: like data)
			-- Assign some_data to data.
			-- (from EV_ANY)
		require -- from EV_ANY
			not_destroyed: not is_destroyed
		ensure -- from EV_ANY
			data_assigned: data = some_data

	set_tooltip (a_tooltip: STRING)
			-- Assign a_tooltip to tooltip.
		require
			not_destroyed: not is_destroyed
			tooltip: a_tooltip /= void
			a_tooltip_not_empty: not a_tooltip.is_empty
		ensure
			tooltip_assigned: a_tooltip.is_equal (tooltip) and tooltip /= a_tooltip
	
feature -- Duplication

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

	destroy
			-- Destroy underlying native toolkit object.
			-- Render Current unusable.
			-- (from EV_ANY)
		ensure -- from EV_ANY
			is_destroyed: is_destroyed
	
feature -- Status Report

	is_destroyed: BOOLEAN
			-- Is Current no longer usable?
			-- (from EV_ANY)
		ensure -- from EV_ANY
			bridge_ok: Result = implementation.is_destroyed
	
invariant

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)
		-- from EV_ANY
	is_initialized: is_initialized
	is_coupled: implementation /= void and then implementation.interface = Current
	default_create_called: default_create_called

end -- class EV_TOOLTIPABLE