indexing

	description: 
		"Callback structure specific to the drawing area. %
		%Associated C structure is XmDrawingAreaCallbackStruct.";
	status: "See notice at end of class.";
	date: "$Date$";
	revision: "$Revision$"

class
	MEL_DRAWING_AREA_CALLBACK_STRUCT

inherit

	MEL_ANY_CALLBACK_STRUCT
		redefine
			reasons_list
		end

create
	make

feature -- Access

	reasons_list: ARRAY [INTEGER] is 
			-- List of reasons that is valid for this
			-- callback structure
			-- (Reasons - XmCR_EXPOSE, XmCR_RESIZE, XmCR_INPUT)
		once
			Result := <<XmCR_EXPOSE, XmCR_RESIZE, XmCR_INPUT>>
		end;

	window_widget (display: MEL_DISPLAY): MEL_WIDGET is
			-- Mel widget from `window' 
		do
			Result := retrieve_widget_from_window (display.handle, window)
		end;

feature -- Pointer access

	window: POINTER is
			-- The widget's window 
		do
			Result := c_window (handle)
		end;

feature {NONE} -- Implementation

	c_window (a_callback_struct_ptr: POINTER): POINTER is
		external
			"C [macro %"callback_struct.h%"] (XmDrawingAreaCallbackStruct *): EIF_POINTER"
		end;

end -- class MEL_DRAWN_BUTTON_CALLBACK_STRUCT


--|----------------------------------------------------------------
--| Motif Eiffel Library: library of reusable components for ISE Eiffel.
--| Copyright (C) 1986-2001 Interactive Software Engineering Inc.
--| All rights reserved. Duplication and distribution prohibited.
--| May be used only with ISE Eiffel, under terms of user license. 
--| Contact ISE for any other use.
--|
--| Interactive Software Engineering Inc.
--| ISE Building
--| 360 Storke Road, Goleta, CA 93117 USA
--| Telephone 805-685-1006, Fax 805-685-6869
--| Electronic mail <info@eiffel.com>
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--| For latest info see award-winning pages: http://www.eiffel.com
--|----------------------------------------------------------------