indexing
	description: "Object font which can be selected into a DC."
	status: "See notice at end of class."
	date: "$Date$"
	revision: "$Revision$"

class interface
	WEL_FONT

create 

	make (a_height, a_width, escapement, orientation, weight, italic, underline, strike_out, charset, output_precision, clip_precision, quality, pitch_and_family: INTEGER; a_face_name: STRING)
			-- Make font named a_face_name.
		require
			a_face_name_not_void: a_face_name /= void

	make_indirect (a_log_font: WEL_LOG_FONT)
			-- Make a font using a_log_font.
		require
			a_log_font_not_void: a_log_font /= void

	make_by_pointer (a_pointer: POINTER)
			-- Set item with a_pointer.
			-- Since item is shared, it does not need
			-- to be freed.
			-- Caution: a_pointer must be a pointer
			-- coming from Windows.
			-- (from WEL_GDI_ANY)
		ensure -- from WEL_ANY
			item_set: item = a_pointer
			shared: shared

feature -- Access

	gdi_objects_count: INTEGER
			-- Number of GDI object currently allocated by the
			-- program.
			--
			-- Note: debug option "WEL_GDI_COUNT" should be enabled, otherwise
			-- this function will return zero.
			-- (from WEL_GDI_ANY)

	height: INTEGER
			-- Size of font measured in pixels.
		ensure
			result_bigger_than_zero: Result > 0

	item: POINTER
			-- Generic Windows handle or structure pointer.
			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
			-- (from WEL_ANY)

	log_font: WEL_LOG_FONT
			-- Log font structure associated to Current
		require
			exists
		ensure
			result_not_void: Result /= void

	point: INTEGER
			-- Size of font in points (1 point = 1/72 of an inch)

	string_height (a_string: STRING): INTEGER
			-- Height of a_string.

	string_size (a_string: STRING): TUPLE [INTEGER, INTEGER]
			-- [width, height] of a_string.

	string_width (a_string: STRING): INTEGER
			-- Width of a_string.

	width: INTEGER
			-- Character width of current fixed-width font.
	
feature -- Status report

	exists: BOOLEAN
			-- Does the item exist?
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			Result = (item /= default_pointer)

	shared: BOOLEAN
			-- Is item shared by another object?
			-- If False (by default), item will
			-- be destroyed by destroy_item.
			-- If True, item will not be destroyed.
			-- (from WEL_ANY)
	
feature -- Status setting

	set_shared
			-- Set shared to True.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			shared: shared

	set_unshared
			-- Set shared to False.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			unshared: not shared
	
feature -- Element change

	set_item (an_item: POINTER)
			-- Set item with an_item
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			item_set: item = an_item
	
feature -- Removal

	delete
			-- Destroy the inner structure of Current.
			--
			-- Call this function when Current is no more needed
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			reference_not_tracked: not reference_tracked
		ensure -- from WEL_REFERENCE_TRACKABLE
			destroyed: not shared implies not exists

	dispose
			-- Destroy the inner structure of Current.
			--
			-- This function is called by the GC when the
			-- object is collected, the developer should
			-- use delete.
			-- (from WEL_REFERENCE_TRACKABLE)
	
feature -- Conversion

	to_integer: INTEGER
			-- Converts item to an integer.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			Result = cwel_pointer_to_integer (item)
	
feature -- Re-initialisation

	set_indirect (a_log_font: WEL_LOG_FONT)
			-- Reset the current font the 'a_log_font' without
			-- creating new object
		require
			a_log_font_not_void: a_log_font /= void
	
feature -- Setting

	set_height (a_height: INTEGER)
			-- Set height with a_height.
		require
			a_height_bigger_than_zero: a_height > 0
	
feature -- Status Report

	reference_tracked: BOOLEAN
			-- Are the number references of Current tracked?
			-- (from WEL_REFERENCE_TRACKABLE)

	references_count: INTEGER
			-- Number of object referring this object.
			-- (from WEL_REFERENCE_TRACKABLE)
	
feature -- Status Setting

	decrement_reference
			-- Decrement the number of references to this object.
			--
			-- When the number of references reach zero,
			-- delete is called if the object is not protected.
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			exists: exists
			tracking_references_started: reference_tracked

	enable_reference_tracking
			-- Set references_tracked to True.
			--
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			exists: exists
			tracking_reference_not_started: not reference_tracked

	increment_reference
			-- Increment the number of references to this object.
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			exists: exists
			tracking_references_started: reference_tracked

	object_id: INTEGER
			-- Runtime Id of Current.
			-- (from WEL_REFERENCE_TRACKABLE)
	
invariant

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

end -- class WEL_FONT