-- File:	DDataStd_DrawDisplay.cdl
-- Created:	Mon Sep  7 10:35:02 1998
-- Author:	Denis PASCAL
--		<dp@dingox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1998


class DrawDriver from DDataStd inherits TShared from MMgt

    ---Purpose: priority rule to display standard attributes is :   
    --          * 1 Constraint
    --          * 2 Object     
    --          * 3 Datum      (Point,Axis,Plane)    
    --          * 4 Geometry   
    --          * 5 NamedShape 



uses ColorKind  from Draw,
     Drawable3D from Draw,
     Label      from TDF,
     Attribute  from TDF,
     Integer    from TDataStd,
     Real       from TDataStd,
     Point      from TDataXtd,
     Axis       from TDataXtd,
     Plane      from TDataXtd,
     Geometry   from TDataXtd,
     Constraint from TDataXtd,
     NamedShape from TNaming,  
     Shape      from TopoDS
 
is

    ---Purpose: access to the current DrawDriver
    --          ================================


    Set (myclass; DD : DrawDriver from DDataStd);  

    Get (myclass)
    returns DrawDriver from DDataStd;


    Create 
    returns DrawDriver from DDataStd;


    ---Purpose: next method is called by DrawPresentation (may be redefined)
    --          ============================================================

    Drawable (me; L : Label from TDF)
    returns Drawable3D from Draw
    is virtual;

    
    ---Purpose: reusable methods (may used when redefined <Drawable>)
    --          =====================================================

    DrawableConstraint (me; C : Constraint from TDataXtd)
    returns Drawable3D from Draw;    
   
    DrawableShape (me; L       : Label from TDF;
                       color   : ColorKind from Draw;
                       current : Boolean from Standard = Standard_True)
    returns Drawable3D from Draw;    
    
    DrawableShape (myclass; s     : Shape     from TopoDS;
                            color : ColorKind from Draw) 
    ---Purpose: May be used for temporary display of a shape
    returns Drawable3D from Draw;
			
end DrawDriver;