note

	description: "General row column implementation"
	legal: "See notice at end of class.";
	status: "See notice at end of class.";
	date: "$Date$";
	revision: "$Revision$"

deferred class

	ROW_COLUMN_I 

inherit

	MANAGER_I
	
feature -- Access

	spacing: INTEGER
			-- Spacing between items
		deferred
		ensure
			positive_result: Result >= 0
		end

	margin_width: INTEGER
			-- Amount of blank space between the left edge
			-- of row column and the first item in each row , and the
			-- right edge of row column and the last item in each row
		deferred
		ensure
			positive_result: Result >= 0
		end;

	margin_height: INTEGER
			-- Amount of blank space between the top edge
			-- of row column and the first item in each column, and the
			-- bottom edge of row column and the last item in each column
		deferred
		ensure
			positive_result: Result >= 0
		end;

feature -- Status report

	is_row_layout: BOOLEAN
			-- Is current row column layout items preferably in row ?
		deferred
		end;

feature -- Status setting

	set_free_size
			-- Set size of items to be free, in vertical layout mode
			-- only width is set to be the same as the widest one, in
			-- horizontal layout mode only height is set to be the same
			-- as the tallest one.
		deferred
		end;

	set_same_size
			-- Set width of items to be the same as the widest one
			-- and height as the tallest one.
		deferred
		end;

feature -- Element change

	set_margin_height (new_margin_height: INTEGER)
			-- Set amount of blank space between the top edge
			-- of row column and the first item in each column, and the
			-- bottom edge of row column and the last item in each column.
		require
			not_negative_margin_height: new_margin_height >= 0
		deferred
		ensure
			set: margin_height = new_margin_height
		end;

	set_margin_width (new_margin_width: INTEGER)
			-- Set amount of blank space between the left edge
			-- of row column and the first item in each row , and the
			-- right edge of row column and the last item in each row.
		require
			not_negative_margin_width: new_margin_width >= 0
		deferred
		ensure
			set: margin_width = new_margin_width
		end;

	set_preferred_count (a_number: INTEGER)
			-- Set preferably count of row or column, according to
			-- row layout mode or column layout mode, to `a_number'.
		require
			not_negative_number:a_number >= 0;
			not_nul_number: a_number /= 0
		deferred
		end;

	set_row_layout (flag: BOOLEAN)
			-- Set row column to layout items preferably in row if `flag',
			-- in column otherwise.
		deferred
		ensure
			flag_correctly_set: is_row_layout = flag
		end;

	set_spacing (new_spacing: INTEGER)
			-- Set spacing between items to `new_spacing'.
		require
			not_spacing_negative: new_spacing >= 0
		deferred
		ensure
			set: spacing = new_spacing
		end;

note
	copyright:	"Copyright (c) 1984-2006, Eiffel Software and others"
	license:	"Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	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 ROW_COLUMN_I