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// File:      VrmlData_Group.hxx
// Created:   29.05.06 08:56:28
// Author:    Alexander GRIGORIEV
// Copyright: Open Cascade 2006


#ifndef VrmlData_Group_HeaderFile
#define VrmlData_Group_HeaderFile

#include <VrmlData_ListOfNode.hxx>
#include <Bnd_B3f.hxx>
#include <gp_Trsf.hxx>

class TopoDS_Shape;
class VrmlData_DataMapOfShapeAppearance;

/**
 * Implementation of node "Group"
 */

class VrmlData_Group : public VrmlData_Node
{
 public:
  typedef VrmlData_ListOfNode::Iterator Iterator;

  // ---------- PUBLIC METHODS ----------

  /**
   * Empty constructor.
   * @param isTransform
   *   True if the group of type Transform is defined
   * @param theAlloc
   *   Allocator used for the list of children
   */
  VrmlData_Group (const Standard_Boolean  isTransform = Standard_False) 
    : myIsTransform     (isTransform)
  {}

  /**
   * Constructor.
   * @param theName
   *   Name of the Group node
   * @param isTransform
   *   True if the group of type Transform is defined
   * @param theAlloc
   *   Allocator used for the list of children
   */
  Standard_EXPORT VrmlData_Group
                        (const VrmlData_Scene&   theScene,
                         const char              * theName,
                         const Standard_Boolean  isTransform = Standard_False);

  /**
   *  Add one node to the Group.
   */
  inline Handle(VrmlData_Node)&
                AddNode         (const Handle(VrmlData_Node)& theNode)
  { return myNodes.Append(theNode); }

  /**
   * Remove one node from the Group.
   * @return
   *   True if the node was located and removed, False if none removed.
   */
  Standard_EXPORT Standard_Boolean
                RemoveNode      (const Handle(VrmlData_Node)& theNode);

  /**
   * Create iterator on nodes belonging to the Group.
   */
  inline Iterator
                NodeIterator    () const { return Iterator (myNodes); }    

  /**
   * Query the bounding box.
   */
  inline const Bnd_B3f&
                Box             () const { return myBox; }

  /**
   * Set the bounding box.
   */
  inline void   SetBox          (const Bnd_B3f& theBox) { myBox = theBox; }

  /**
   * Set the transformation. Returns True if the group is Transform type,
   * otherwise do nothing and return False.
   */
  Standard_EXPORT Standard_Boolean
                SetTransform    (const gp_Trsf& theTrsf);

  /**
   * Query the transform value.
   * For group without transformation this always returns Identity
   */ 
  inline const gp_Trsf&
                GetTransform     () const { return myTrsf; }

  /**
   * Query if the node is Transform type.
   */
  inline Standard_Boolean
                IsTransform     () const { return myIsTransform; }

  /**
   * Create a copy of this node.
   * If the parameter is null, a new copied node is created. Otherwise new node
   * is not created, but rather the given one is modified.
   */
  Standard_EXPORT virtual Handle(VrmlData_Node)
                Clone           (const Handle(VrmlData_Node)& theOther) const;

  /**
   * Fill the Node internal data from the given input stream.
   */
  Standard_EXPORT virtual VrmlData_ErrorStatus
                Read            (VrmlData_InBuffer& theBuffer);

  /**
   * Write the Node to output stream.
   */
  Standard_EXPORT virtual VrmlData_ErrorStatus
                Write           (const char * thePrefix) const;

  /**
   * Find a node by its name, inside this Group
   * @param theName
   *   Name of the node to search for.
   * @param theLocation
   *   Location of the found node with respect to this Group.
   */
  Standard_EXPORT Handle(VrmlData_Node)
                                FindNode (const char * theName,
                                          gp_Trsf&     theLocation) const;

  /**
   * Get the shape representing the group geometry.
   */
  Standard_EXPORT void
                Shape           (TopoDS_Shape&                     theShape,
                                 VrmlData_DataMapOfShapeAppearance * pMapApp);

 protected:
  // ---------- PROTECTED METHODS ----------

  /**
   * Try to open a file by the given filename, using the search directories
   * list myVrmlDir of the Scene.
   */
  Standard_EXPORT VrmlData_ErrorStatus
                openFile        (Standard_IStream&              theStream,
                                 const TCollection_AsciiString& theFilename);

 private:
  // ---------- PRIVATE FIELDS ----------

  Standard_Boolean      myIsTransform;
  VrmlData_ListOfNode   myNodes;
  Bnd_B3f               myBox;
  gp_Trsf               myTrsf;

 public:
// Declaration of CASCADE RTTI
DEFINE_STANDARD_RTTI (VrmlData_Group)
};

// Definition of HANDLE object using Standard_DefineHandle.hxx
DEFINE_STANDARD_HANDLE (VrmlData_Group, VrmlData_Node)


#endif