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 // Created on: 1997-01-08
 // Created by: Robert COUBLANC
 // Copyright (c) 1997-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _AIS_ConnectedInteractive_HeaderFile
 #define _AIS_ConnectedInteractive_HeaderFile
 
 #include <AIS_InteractiveObject.hxx>
 #include <AIS_KindOfInteractive.hxx>
 #include <TopoDS_Shape.hxx>
 
 //! Creates an arbitrary located instance of another Interactive Object,
 //! which serves as a reference.
 //! This allows you to use the Connected Interactive
 //! Object without having to recalculate presentation,
 //! selection or graphic structure. These are deduced
 //! from your reference object.
 //! The relation between the connected interactive object
 //! and its source is generally one of geometric transformation.
 //! AIS_ConnectedInteractive class supports selection mode 0 for any InteractiveObject and
 //! all standard modes if its reference based on AIS_Shape.
 //! Descendants may redefine ComputeSelection() though.
 //! Also ConnectedInteractive will handle HLR if its reference based on AIS_Shape.
 class AIS_ConnectedInteractive : public AIS_InteractiveObject
 {
   DEFINE_STANDARD_RTTIEXT(AIS_ConnectedInteractive, AIS_InteractiveObject)
 public:
   //! Disconnects the previous view and sets highlight
   //! mode to 0. This highlights the wireframe presentation
   //! aTypeOfPresentation3d.
   //! Top_AllView deactivates hidden line removal.
   Standard_EXPORT AIS_ConnectedInteractive(
     const PrsMgr_TypeOfPresentation3d aTypeOfPresentation3d = PrsMgr_TOP_AllView);
 
   //! Returns KOI_Object
   AIS_KindOfInteractive Type() const override { return AIS_KindOfInteractive_Object; }
 
   //! Returns 0
   int Signature() const override { return 0; }
 
   //! Establishes the connection between the Connected
   //! Interactive Object, anotherIobj, and its reference.
   void Connect(const occ::handle<AIS_InteractiveObject>& theAnotherObj)
   {
     connect(theAnotherObj, occ::handle<TopLoc_Datum3D>());
   }
 
   //! Establishes the connection between the Connected
   //! Interactive Object, anotherIobj, and its reference.
   //! Locates instance in aLocation.
   void Connect(const occ::handle<AIS_InteractiveObject>& theAnotherObj, const gp_Trsf& theLocation)
   {
     connect(theAnotherObj, new TopLoc_Datum3D(theLocation));
   }
 
   //! Establishes the connection between the Connected
   //! Interactive Object, anotherIobj, and its reference.
   //! Locates instance in aLocation.
   void Connect(const occ::handle<AIS_InteractiveObject>& theAnotherObj,
                const occ::handle<TopLoc_Datum3D>&        theLocation)
   {
     connect(theAnotherObj, theLocation);
   }
 
   //! Returns true if there is a connection established
   //! between the presentation and its source reference.
   bool HasConnection() const { return !myReference.IsNull(); }
 
   //! Returns the connection with the reference Interactive Object.
   const occ::handle<AIS_InteractiveObject>& ConnectedTo() const { return myReference; }
 
   //! Clears the connection with a source reference. The
   //! presentation will no longer be displayed.
   //! Warning Must be done before deleting the presentation.
   Standard_EXPORT void Disconnect();
 
   //! Informs the graphic context that the interactive Object
   //! may be decomposed into sub-shapes for dynamic selection.
   bool AcceptShapeDecomposition() const override
   {
     return !myReference.IsNull() && myReference->AcceptShapeDecomposition();
   }
 
   //! Return true if reference presentation accepts specified display mode.
   bool AcceptDisplayMode(const int theMode) const override
   {
     return myReference.IsNull() || myReference->AcceptDisplayMode(theMode);
   }
 
 protected:
   //! Calculates the view aPresentation and its updates.
   //! The latter are managed by aPresentationManager.
   //! The display mode aMode is 0 by default.
   //! 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.
   Standard_EXPORT void Compute(const occ::handle<PrsMgr_PresentationManager>& thePrsMgr,
                                const occ::handle<Prs3d_Presentation>&         theprs,
                                const int                                      theMode) override;
 
   //! Computes the presentation according to a point of view.
   Standard_EXPORT void computeHLR(const occ::handle<Graphic3d_Camera>&   theProjector,
                                   const occ::handle<TopLoc_Datum3D>&     theTrsf,
                                   const occ::handle<Prs3d_Presentation>& thePrs) override;
 
   //! Generates sensitive entities by copying
   //! them from myReference selection, creates and sets an entity
   //! owner for this entities and adds them to theSelection
   Standard_EXPORT void ComputeSelection(const occ::handle<SelectMgr_Selection>& theSelection,
                                         const int                               theMode) override;
 
   //! Generates sensitive entities by copying
   //! them from myReference sub shapes selection, creates and sets an entity
   //! owner for this entities and adds them to theSelection
   Standard_EXPORT void computeSubShapeSelection(
     const occ::handle<SelectMgr_Selection>& theSelection,
     const int                               theMode);
 
   Standard_EXPORT void updateShape(const bool WithLocation = true);
 
   Standard_EXPORT void connect(const occ::handle<AIS_InteractiveObject>& theAnotherObj,
                                const occ::handle<TopLoc_Datum3D>&        theLocation);
 
 protected:
   occ::handle<AIS_InteractiveObject> myReference;
   TopoDS_Shape                       myShape;
 };
 
 #endif // _AIS_ConnectedInteractive_HeaderFile

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