-- File:	TDataStd_Current.cdl
-- Created:	Mon Aug  2 09:49:50 1999
-- Author:	Denis PASCAL
--		<dp@dingox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1999


class Current from TDataStd inherits Attribute from TDF

	---Purpose: this attribute,  located at root label,  manage an
	--          access to a current label.

uses Attribute       from TDF,
     Label           from TDF,
     GUID            from Standard,
     DataSet         from TDF,
     RelocationTable from TDF

is

    ---Purpose: class methods
    --          =============


    GetID (myclass)   
    	---C++: return const &  
    returns GUID from Standard;


    Set (myclass; L : Label from TDF);   
    ---Purpose: Set <L> as current of <L> Framework.


    Get (myclass; acces : Label from TDF)    
    ---Purpose: returns current of <acces> Framework. raise if (!Has)
    returns Label from TDF;    


    Has (myclass; acces : Label from TDF)
    ---Purpose: returns True if a  current label is managed in <acces>
    --          Framework.
    returns Boolean from Standard;
    
    ---Purpose: class methods
    --          =============    

    Create
    returns mutable Current from TDataStd;    

    SetLabel (me : mutable; current : Label from TDF);
    
    GetLabel (me)
    returns Label from TDF;

    	---Category: TDF_Attribute methods
    	--           =====================
    
    ID (me)
    	---C++: return const & 
    returns GUID from Standard;

    Restore (me: mutable; With : Attribute from TDF);

    NewEmpty (me)
    returns mutable Attribute from TDF;

    Paste (me; Into : mutable Attribute from TDF;
	       RT   : mutable RelocationTable from TDF);    

    Dump(me; anOS : in out OStream from Standard)
    returns OStream from Standard
    is redefined;
    ---C++: return &


fields

    myLabel : Label from TDF;

end Current;