-- File:	AIS_MultipleConnectedInteractive.cdl
-- Created:	Tue Apr 22 17:04:42 1997
-- Author:	Guest Design
--		<g_design@hankox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1997

class MultipleConnectedInteractive from AIS inherits InteractiveObject from AIS

    
    ---Purpose: Defines an Interactive Object by gathering together
    -- several object presentations. This is done through a
    -- list of interactive objects. These can also be
    -- Connected objects. That way memory-costly
    -- calculations of presentation are avoided.
        
        
uses


    TypeOfPresentation3d   from PrsMgr,
    InteractiveObject      from AIS,
    Boolean                from Standard,
    SequenceOfInteractive  from AIS,
    KindOfInteractive      from AIS,
    PresentationManager3d  from PrsMgr,
    PresentationManager2d from PrsMgr,
    GraphicObject         from Graphic2d,    
    Presentation           from Prs3d,
    Projector             from Prs3d,
    Transformation        from Geom,
    Integer                from Standard,
    Selection              from SelectMgr

is 
    

    Create (aTypeOfPresentation3d: TypeOfPresentation3d from PrsMgr = PrsMgr_TOP_AllView) 
    returns  mutable  MultipleConnectedInteractive  from  AIS;
    ---Purpose: Initializes the Interactive Object with multiple
    -- presentation connections. If aTypeOfPresentation3d
    -- does not have the affectation PrsMgr_TOP_AllView,
    -- it is projector dependent.
    
    Connect(me          : mutable; 
    	    anotherIObj : InteractiveObject from AIS);
    ---Purpose: Add anotherIObj in the presentation of me


    Type(me) returns KindOfInteractive from AIS
    is redefined virtual;	  

    Signature(me) returns Integer from Standard
    is redefined virtual;

    HasConnection(me) returns Boolean from Standard;
    ---Purpose: Returns true if the object is connected to others.
   
     ConnectedTo(me) returns SequenceOfInteractive from AIS;
     ---Purpose:
     -- Returns the connection references of the previous
     -- Interactive Objects in view.
     ---C++: inline
     ---C++: return const&

    Disconnect(me:mutable;
    	       anotherIObj : InteractiveObject from AIS);
    ---Purpose:  Removes the connection anotherIObj to an entity.

    DisconnectAll(me:mutable);
    ---Purpose: Clears all the connections to objects.
    
    Compute(me:mutable;
            aPresentationManager :         PresentationManager3d from PrsMgr;
            aPresentation        : mutable Presentation          from Prs3d;
            aMode                :         Integer               from Standard = 0)
    ---Level: Internal 
    ---Purpose: this method is redefined virtual;
    --          when the instance is connected to another
    --          InteractiveObject,this method doesn't
    --          compute anything, but just uses the 
    --          presentation of this last object, with
    --          a transformation if there's one stored. 
    is redefined virtual private;

    Compute(me:mutable;
    	    aPresentationManager: PresentationManager2d from PrsMgr;
            aPresentation: mutable GraphicObject from Graphic2d;
            aMode: Integer from Standard = 0)
    is redefined;	

    Compute(me            : mutable;
    	    aProjector    : Projector from Prs3d;
    	    aTrsf         : Transformation from Geom;
	    aPresentation : mutable Presentation from Prs3d)
    is redefined;
    ---Purpose: computes the presentation according to a point of view
    --          given by <aProjector>. 
    --          To be Used when the associated degenerated Presentations 
    --          have been transformed by <aTrsf> which is not a Pure
    --          Translation. The HLR Prs can't be deducted automatically
    --          WARNING :<aTrsf> must be applied
    --           to the object to display before computation  !!!

    Compute(me:mutable;
    	        aProjector: Projector from Prs3d;
                aPresentation: mutable Presentation from Prs3d)
    is redefined ;     

    ComputeSelection(me:mutable; aSelection :mutable Selection from SelectMgr;
                                 aMode      :        Integer   from Standard)
    is redefined virtual private;



fields

    myReferences         : SequenceOfInteractive from AIS;
    myPreviousReferences : SequenceOfInteractive from AIS;
    
end MultipleConnectedInteractive;