-- File:	V2d_BackgroundGraphicObject.cdl
-- Created:	Thu Feb 19 13:16:21 1998
-- Authors:	Gerard GRAS
--		<gg@photox>
---Copyright:	 Matra Datavision 1993

private class BackgroundGraphicObject from V2d inherits GraphicObject from Graphic2d 

	---Version:

	---Purpose: Creates a 2D background graphic object in a view.
	--	    A graphic object is a primitives manager
	--	    which drawn before all the others graphic objects

	---Keywords:
	---Warning:
	---References:

uses
	View                    from Graphic2d

is
	-------------------------
	-- Category: Constructors
	-------------------------

        Create (aView: View from Graphic2d)
        returns mutable BackgroundGraphicObject from V2d;
        ---Level: Public
        ---Purpose: Creates a graphic object in the view <aView>.
        --          A graphic object manages a sequence of primitives.
        ---Category: Constructors

	-------------------------------------------------
	-- Category: Methods to manage the drawing priority 
	-------------------------------------------------

	MaxPriority (me) returns Integer from Standard is redefined;
	---Level: Public
	---Purpose: Returns the max usable relative priority of the 
	--         "hiding" graphic object. 	

        ----------------------------
        -- Category: Private methods
        ----------------------------

        BasePriority (me) returns Integer from Standard is redefined private;
        ---Level: Internal
        ---Purpose: Returns the min usable absolute priority of the
        --         "hiding" graphic object.  

end BackgroundGraphicObject from V2d;