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 // Created on: 1995-02-20
 // Created by: Mister rmi
 // Copyright (c) 1995-1999 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 _SelectMgr_SelectableObject_HeaderFile
 #define _SelectMgr_SelectableObject_HeaderFile
 
 #include <PrsMgr_PresentableObject.hxx>
 #include <SelectMgr_IndexedMapOfOwner.hxx>
 #include <SelectMgr_SequenceOfSelection.hxx>
 #include <SelectMgr_Selection.hxx>
 #include <SelectMgr_SequenceOfOwner.hxx>
 
 class SelectMgr_EntityOwner;
 
 //! A framework to supply the structure of the object to be selected.
 //! At the first pick, this structure is created by calling the appropriate algorithm and retaining this framework for further picking.
 //! This abstract framework is inherited in Application Interactive Services (AIS), notably in AIS_InteractiveObject.
 //! Consequently, 3D selection should be handled by the relevant daughter classes and their member functions in AIS.
 //! This is particularly true in the creation of new interactive objects.
 //!
 //! Key interface methods to be implemented by every Selectable Object:
 //! * Presentable Object (PrsMgr_PresentableObject)
 //!   Consider defining an enumeration of supported Display Mode indexes for particular Interactive Object or class of Interactive Objects.
 //!   - AcceptDisplayMode() accepting display modes implemented by this object;
 //!   - Compute() computing presentation for the given display mode index;
 //! * Selectable Object (SelectMgr_SelectableObject)
 //!   Consider defining an enumeration of supported Selection Mode indexes for particular Interactive Object or class of Interactive Objects.
 //!   - ComputeSelection() computing selectable entities for the given selection mode index.
 class SelectMgr_SelectableObject : public PrsMgr_PresentableObject
 {
   DEFINE_STANDARD_RTTIEXT(SelectMgr_SelectableObject, PrsMgr_PresentableObject)
   friend class SelectMgr_SelectionManager;
 public:
 
   //! Clears all selections of the object
   Standard_EXPORT virtual ~SelectMgr_SelectableObject();
 
   //! Computes sensitive primitives for the given selection mode - key interface method of Selectable Object.
   //! @param theSelection selection to fill
   //! @param theMode selection mode to create sensitive primitives
   virtual void ComputeSelection (const Handle(SelectMgr_Selection)& theSelection,
                                  const Standard_Integer theMode) = 0;
 
   //! Informs the graphic context that the interactive Object may be decomposed into sub-shapes for dynamic selection.
   //! The most used Interactive Object is AIS_Shape.
   virtual Standard_Boolean AcceptShapeDecomposition() const { return Standard_False; }
 
   //! Re-computes the sensitive primitives for all modes. IMPORTANT: Do not use
   //! this method to update selection primitives except implementing custom selection manager!
   //! This method does not take into account necessary BVH updates, but may invalidate the pointers
   //! it refers to. TO UPDATE SELECTION properly from outside classes, use method UpdateSelection.
   Standard_EXPORT void RecomputePrimitives();
   
   //! Re-computes the sensitive primitives which correspond to the <theMode>th selection mode.
   //! IMPORTANT: Do not use this method to update selection primitives except implementing custom selection manager!
   //! selection manager! This method does not take into account necessary BVH updates, but may invalidate
   //! the pointers it refers to. TO UPDATE SELECTION properly from outside classes, use method UpdateSelection.
   Standard_EXPORT void RecomputePrimitives (const Standard_Integer theMode);
   
   //! Adds the selection aSelection with the selection mode
   //! index aMode to this framework.
   Standard_EXPORT void AddSelection (const Handle(SelectMgr_Selection)& aSelection, const Standard_Integer aMode);
   
   //! Empties all the selections in the SelectableObject
   //! <update> parameter defines whether all object's
   //! selections should be flagged for further update or not.
   //! This improved method can be used to recompute an
   //! object's selection (without redisplaying the object
   //! completely) when some selection mode is activated not for the first time.
   Standard_EXPORT void ClearSelections (const Standard_Boolean update = Standard_False);
   
   //! Returns the selection having specified selection mode or NULL.
   Standard_EXPORT const Handle(SelectMgr_Selection)& Selection (const Standard_Integer theMode) const;
 
   //! Returns true if a selection corresponding to the selection mode theMode was computed for this object.
   Standard_Boolean HasSelection (const Standard_Integer theMode) const { return !Selection (theMode).IsNull(); }
 
   //! Return the sequence of selections.
   const SelectMgr_SequenceOfSelection& Selections() const { return myselections; }
 
   Standard_EXPORT void ResetTransformation() Standard_OVERRIDE;
   
   //! Recomputes the location of the selection aSelection.
   Standard_EXPORT virtual void UpdateTransformation() Standard_OVERRIDE;
   
   //! Updates locations in all sensitive entities from <aSelection>
   //! and in corresponding entity owners.
   Standard_EXPORT virtual void UpdateTransformations (const Handle(SelectMgr_Selection)& aSelection);
   
   //! Method which draws selected owners ( for fast presentation draw )
   Standard_EXPORT virtual void HilightSelected (const Handle(PrsMgr_PresentationManager)& thePrsMgr,
                                                 const SelectMgr_SequenceOfOwner& theSeq);
   
   //! Method which clear all selected owners belonging
   //! to this selectable object ( for fast presentation draw )
   Standard_EXPORT virtual void ClearSelected();
 
   //! Method that needs to be implemented when the object
   //! manages selection and dynamic highlighting on its own.
   //! Clears or invalidates dynamic highlight presentation.
   //! By default it clears immediate draw of given presentation
   //! manager.
   Standard_EXPORT virtual void ClearDynamicHighlight (const Handle(PrsMgr_PresentationManager)& theMgr);
 
   //! Method which hilight an owner belonging to
   //! this selectable object  ( for fast presentation draw )
   Standard_EXPORT virtual void HilightOwnerWithColor (const Handle(PrsMgr_PresentationManager)& thePM,
                                                       const Handle(Prs3d_Drawer)& theStyle,
                                                       const Handle(SelectMgr_EntityOwner)& theOwner);
   
   //! If returns True, the old mechanism for highlighting selected objects is used (HilightSelected Method may be empty).
   //! If returns False, the HilightSelected method will be fully responsible for highlighting selected entity owners belonging to this selectable object.
   virtual Standard_Boolean IsAutoHilight() const { return myAutoHilight; }
   
   //! Set AutoHilight property to true or false.
   virtual void SetAutoHilight (const Standard_Boolean theAutoHilight) { myAutoHilight = theAutoHilight; }
   
   //! Creates or returns existing presentation for highlighting detected object.
   //! @param thePrsMgr presentation manager to create new presentation
   //! @return existing or newly created presentation (when thePrsMgr is not NULL)
   Standard_EXPORT Handle(Prs3d_Presentation) GetHilightPresentation (const Handle(PrsMgr_PresentationManager)& thePrsMgr);
 
   //! Creates or returns existing presentation for highlighting selected object.
   //! @param thePrsMgr presentation manager to create new presentation
   //! @return existing or newly created presentation (when thePrsMgr is not NULL)
   Standard_EXPORT Handle(Prs3d_Presentation) GetSelectPresentation (const Handle(PrsMgr_PresentationManager)& thePrsMgr);
 
   //! Removes presentations returned by GetHilightPresentation() and GetSelectPresentation().
   Standard_EXPORT virtual void ErasePresentations (Standard_Boolean theToRemove);
 
   //! Set Z layer ID and update all presentations of the selectable object.
   //! The layers mechanism allows drawing objects in higher layers in overlay of objects in lower layers.
   Standard_EXPORT virtual void SetZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
   
   //! Sets update status FULL to selections of the object. Must be used as the only method of UpdateSelection
   //! from outer classes to prevent BVH structures from being outdated.
   void UpdateSelection (const Standard_Integer theMode = -1)
   {
     updateSelection (theMode);
   }
 
   //! Sets common entity owner for assembly sensitive object entities
   Standard_EXPORT void SetAssemblyOwner (const Handle(SelectMgr_EntityOwner)& theOwner, const Standard_Integer theMode = -1);
 
   //! Returns a bounding box of sensitive entities with the owners given if they are a part of activated selection
   Standard_EXPORT Bnd_Box BndBoxOfSelected (const Handle(SelectMgr_IndexedMapOfOwner)& theOwners);
 
   //! Returns the mode for selection of object as a whole; 0 by default.
   Standard_Integer GlobalSelectionMode() const { return myGlobalSelMode; }
 
   //! Returns the owner of mode for selection of object as a whole
   Standard_EXPORT virtual Handle(SelectMgr_EntityOwner) GlobalSelOwner() const;
 
   //! Returns common entity owner if the object is an assembly
   Standard_EXPORT virtual const Handle(SelectMgr_EntityOwner)& GetAssemblyOwner() const;
 
   //! Dumps the content of me into the stream
   Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const Standard_OVERRIDE;
 
 protected:
 
   //! Protected empty constructor.
   Standard_EXPORT SelectMgr_SelectableObject(const PrsMgr_TypeOfPresentation3d aTypeOfPresentation3d = PrsMgr_TOP_AllView);
 
   //! Override global selection mode.
   void setGlobalSelMode (const Standard_Integer theMode)
   {
     myGlobalSelMode = theMode > 0 ? theMode : 0;
   }
 
   //! Update clipping planes state.
   Standard_EXPORT virtual void UpdateClipping() Standard_OVERRIDE;
 
   //! Sets update status FULL to selections of the object.
   //! Must be used as the only method of UpdateSelection from outer classes to prevent BVH structures from being outdated.
   Standard_EXPORT virtual void updateSelection (const Standard_Integer theMode);
 
 protected:
 
   SelectMgr_SequenceOfSelection myselections;    //!< list of selections
   Handle(Prs3d_Presentation)    mySelectionPrs;  //!< optional presentation for highlighting selected object
   Handle(Prs3d_Presentation)    myHilightPrs;    //!< optional presentation for highlighting detected object
   Standard_Integer              myGlobalSelMode; //!< global selection mode
   Standard_Boolean              myAutoHilight;   //!< auto-highlighting flag defining
 
 };
 
 DEFINE_STANDARD_HANDLE(SelectMgr_SelectableObject, PrsMgr_PresentableObject)
 
 #endif // _SelectMgr_SelectableObject_HeaderFile

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