-- File:	DDataStd_TreeBrowser.cdl
--      	--------------------
-- Author:	DAUTRY Philippe
--		<fid@fox.paris1.matra-dtv.fr>
---Copyright:	 MATRA DATAVISION 1997

---Version:	0.0
---History:	Version	Date		Purpose
--		0.0	Nov 27 1997	Creation

class TreeBrowser from DDataStd inherits Drawable3D from Draw

	---Purpose: Browses a TreeNode from TDataStd.
	--          =================================

uses

    Label               from TDF,
    TreeNode            from TDataStd,
    Interpretor         from Draw,
    Display             from Draw,
    AsciiString         from TCollection

is

    Create  (root : Label from TDF)
    returns mutable TreeBrowser from DDataStd;
    
    DrawOn (me; dis : in out Display);
    
    Copy (me) 
    returns mutable Drawable3D from Draw
    is redefined;

    Dump (me; S : in out OStream) 
    is redefined;

    Whatis (me; I : in out Interpretor from Draw)
    is redefined;

    ---Purpose: Specific methods
    --          ================

    Label (me : mutable; root : Label from TDF);
    
    Label (me) 
    returns Label from TDF;

    OpenRoot (me)
    ---Purpose: Returns   a   string composed with  the   TreeNode  of
    --          <myLabel>.
     returns AsciiString from TCollection;

    OpenNode (me; L : Label from TDF)
    ---Purpose:  Returns a string composed   with the sub-TreeNodes of
    --          <L>
    returns AsciiString from TCollection;

    OpenNode (me; aTreeNode :        TreeNode    from TDataStd;
    	    	  aList     : in out AsciiString from TCollection)  
    ---Purpose: Returns a string composed with the sub-TreeNodes
    --          of <aTreeNode>. Used to implement other methods.
    is private;

fields

    myRoot : Label from TDF;

end TreeBrowser;