Import Geant4 7.1.0 source tree

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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// $Id: G4CallbackModel.hh,v 1.3 2005/03/03 16:22:02 allison Exp $
+// GEANT4 tag $Name: geant4-07-01 $
+//
+// 
+// John Allison  31st December 1997.
+//
+// Class Description:
+//
+// G4CallbackModel calls a user-defined function containing, for
+// example, calls to the Draw methods of G4VVisManager.  This allows
+// the user to add his own graphical objects to a scene.  The idea is
+// that the callback function is invoked by the vis system to refresh
+// the screen or remake a graphical database whenever required.
+//
+// The user instantiates a function object containing, for example,
+// calls to the Draw methods of G4VVisManager.  A base class
+// G4VUserVisAction is provided in the visualisation category.  A
+// G4CallbackModel is made by instantiating this template with a
+// pointer to the function object.  The G4VisManager does this for the
+// user if he/she registers it (SetUserAction) and issues the command
+// /vis/scene/add/userAction.  See the User Guide for Application
+// Developers, Section 8.8.7 and 8.8.8.
+
+#ifndef G4CALLBACKMODEL_HH
+#define G4CALLBACKMODEL_HH
+
+#include "G4VModel.hh"
+
+template <class F> class G4CallbackModel: public G4VModel {
+
+ public:
+  G4CallbackModel(F* function):
+    fFunction(function) {}
+  ~G4CallbackModel() {}
+  void DescribeYourselfTo(G4VGraphicsScene&) {
+    (*fFunction)(fTransform);
+  }
+
+protected:
+
+  F* fFunction;
+
+private:
+
+  // Private copy constructor and assigment operator - copying and
+  // assignment not allowed.  Keeps CodeWizard happy.
+  G4CallbackModel (const G4CallbackModel&);
+  G4CallbackModel& operator = (const G4CallbackModel&);
+};
+
+#endif