X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=kernel%2Fsrc%2FbbtkBlackBox.cxx;h=c35e82c78a5bb50c0eb4df6267a87b5cdd9eb518;hb=4e0c70c1aa10fed31d4a6bf30cb316eaa1194e13;hp=1c980b724347e203b128f68531361b2f0ec09f6d;hpb=027bd220c2819146658da884f08b10ffc40545e3;p=bbtk.git

diff --git a/kernel/src/bbtkBlackBox.cxx b/kernel/src/bbtkBlackBox.cxx
index 1c980b7..c35e82c 100644
--- a/kernel/src/bbtkBlackBox.cxx
+++ b/kernel/src/bbtkBlackBox.cxx
@@ -1,21 +1,32 @@
-/*=========================================================================
-                                                                                
-Program:   bbtk
-Module:    $RCSfile: bbtkBlackBox.cxx,v $
-Language:  C++
-Date:      $Date: 2008/02/18 10:41:02 $
-Version:   $Revision: 1.4 $
-                                                                                
-Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
-l'Image). All rights reserved. See doc/license.txt or
-http://www.creatis.insa-lyon.fr/Public/bbtk/License.html for details.
-                                                                                
-This software is distributed WITHOUT ANY WARRANTY; without even
-the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-PURPOSE.  See the above copyright notices for more information.
-                                                                                
+/*=========================================================================                                                                               
+  Program:   bbtk
+  Module:    $RCSfile: bbtkBlackBox.cxx,v $
+  Language:  C++
+  Date:      $Date: 2010/01/21 16:03:17 $
+  Version:   $Revision: 1.49 $
 =========================================================================*/
 
+/* ---------------------------------------------------------------------
+
+* Copyright (c) CREATIS-LRMN (Centre de Recherche en Imagerie Medicale)
+* Authors : Eduardo Davila, Laurent Guigues, Jean-Pierre Roux
+*
+*  This software is governed by the CeCILL-B license under French law and 
+*  abiding by the rules of distribution of free software. You can  use, 
+*  modify and/ or redistribute the software under the terms of the CeCILL-B 
+*  license as circulated by CEA, CNRS and INRIA at the following URL 
+*  http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html 
+*  or in the file LICENSE.txt.
+*
+*  As a counterpart to the access to the source code and  rights to copy,
+*  modify and redistribute granted by the license, users are provided only
+*  with a limited warranty  and the software's author,  the holder of the
+*  economic rights,  and the successive licensors  have only  limited
+*  liability. 
+*
+*  The fact that you are presently reading this means that you have had
+*  knowledge of the CeCILL-B license and that you accept its terms.
+* ------------------------------------------------------------------------ */                                                                         
 
 /**
  *  \file 
@@ -25,9 +36,11 @@ PURPOSE.  See the above copyright notices for more information.
 #include "bbtkPackage.h"
 #include "bbtkMessageManager.h"
 #include "bbtkFactory.h"
+#include "bbtkBlackBoxOutputConnector.h"
 
 #include "bbtkConfigurationFile.h"
 #include "bbtkWxBlackBox.h"
+#include "bbtkWx.h"
 
 #include <fstream>
 //#include <vector>
@@ -35,24 +48,106 @@ PURPOSE.  See the above copyright notices for more information.
 
 namespace bbtk
 {
+
+
+  static bool bbmgSomeBoxExecuting = false;
+  static bool bbmgFreezeExecution = false;
+  static std::set<BlackBox::WeakPointer> bbmgExecutionList;
+
+  //=========================================================================
+
+  BlackBox::Deleter::Deleter()
+  {
+  }
+  //=========================================================================
+  
+  //=========================================================================
+  int BlackBox::Deleter::Delete(Object* p)
+  {
+    BlackBox* b = dynamic_cast<BlackBox*>(p);
+    if (!b)
+      {
+	bbtkInternalError("BlackBox::Deleter::Delete("<<p->GetObjectName()
+			  <<"["<<p<<"]) : "
+			  <<"dynamic cast to BlackBox* failed !");
+      }
+    std::string name = p->GetObjectName();//b->bbGetNameWithParent();
+    bbtkDebugMessage("object",2,"##> BlackBox::Deleter(\""<<name<<"\")"<<std::endl);
+
+
+    BlackBoxDescriptor::WeakPointer desc = b->bbGetDescriptor();
+    bbtkDebugMessage("object",2,"##> BlackBox::Deleter(\""<<name<<"\") : deleting black box"<<std::endl);
+    
+    int refs = b->bbDelete();
+
+    bbtkDebugMessage("object",2,"##> BlackBox::Deleter(\""<<name<<"\") : releasing descriptor"<<std::endl);
+    
+    if (!desc.expired()) 
+      {
+	Package::WeakPointer pack = desc.lock()->GetPackage();
+	if (!pack.expired()) 
+	  {
+	    Package::ReleaseBlackBoxDescriptor(pack,desc);
+	  }
+	else 
+	  {
+	    bbtkDebugMessage("object",2,"##> BlackBox::Deleter(\""<<name<<"\") : descriptor package expired (was not held by a package and the box was the last instance)"<<std::endl);
+	  }
+      }
+    else
+      {
+	bbtkDebugMessage("object",2,"##> BlackBox::Deleter(\""<<name<<"\") : descriptor expired : nothing to do (was not held by a package or the box is a complex black box prototype)"<<std::endl);
+      }
+    bbtkDebugMessage("object",2,"<## BlackBox::Deleter(\""<<name<<"\")"<<std::endl);
+    return refs;
+  }
+  //=========================================================================
+
   //=========================================================================
   BlackBox::BlackBox(const std::string &name) 
-    : bbmName(name), bbmStatus(MODIFIED), 
-      bbmBoxProcessMode("Pipeline"),bbmParent(NULL)
+    : 
+    //    bbmStatus(MODIFIED), 
+    bbmInitialized(false),
+    bbmExecuting(false),
+    bbmName(name),
+    bbmBoxProcessMode("Pipeline"),
+    bbmParent()
+    
   {
-    bbtkDebugMessage("Kernel",7,"BlackBox::BlackBox(\""
+	  //JCP 02-11-09
+	 // bbmBoxProcessMode = "Pipeline";	
+//std::cout<<"JCP BlackBox::BlackBox(const std::string &name) name=" <<name
+//		  <<"bbmBoxProcessMode="<<bbmBoxProcessMode<<std::endl;
+    bbtkBlackBoxDebugMessage("object",4,"==> BlackBox::BlackBox(\""
+		     <<name<<"\")"<<std::endl);
+    bbtkBlackBoxDebugMessage("object",4,"<== BlackBox::BlackBox(\""
 		     <<name<<"\")"<<std::endl);
   }
   //=========================================================================
 
+  //=========================================================================
+  BlackBox::BlackBox(const BlackBox&)
+  {}
 
   //=========================================================================
   BlackBox::BlackBox(BlackBox& from, const std::string &name) 
-    : bbmName(name), 
-      bbmStatus(from.bbmStatus), 
-      bbmBoxProcessMode(from.bbmBoxProcessMode),bbmParent(NULL)
+    :
+    //    bbmStatus(from.bbmStatus), 
+    bbmInitialized(false),
+    bbmExecuting(false),
+    bbmName(name), 
+    bbmBoxProcessMode(from.bbmBoxProcessMode),
+    bbmParent()
+    
   {
-    bbtkDebugMessage("Kernel",7,"BlackBox::BlackBox("
+	  //JCP 02-11-09
+	  //bbmBoxProcessMode = from.bbmBoxProcessMode;
+	  //std::cout<<"JCP BlackBox::BlackBox(const std::string &name) name=" <<name
+		//  <<"bbmBoxProcessMode="<<bbmBoxProcessMode<<std::endl;
+    bbtkBlackBoxDebugMessage("object",4,"==> BlackBox::BlackBox("
+		     <<from.bbGetFullName()<<",\""
+		     <<name<<"\")"<<std::endl);
+    bbtkBlackBoxDebugMessage("object",4,"<== BlackBox::BlackBox("
 		     <<from.bbGetFullName()<<",\""
 		     <<name<<"\")"<<std::endl);
   }
@@ -62,72 +157,31 @@ namespace bbtk
   //=========================================================================
   BlackBox::~BlackBox()
   {
-    //    std::cout << "EED BlackBox::~BlackBox 01 [" << bbGetName()<<"]\n";
-    bbtkDebugMessageInc("Kernel",7,"BlackBox::~BlackBox()"<<std::endl);
+    bbtkBlackBoxDebugMessage("object",4,"==> BlackBox::~BlackBox() ["<<bbmName
+		     <<"]"<<std::endl);
     this->bbDesallocateConnectors();
-    //printf("EED BlackBox::~BlackBox 02 \n");
-    bbtkDebugDecTab("Kernel",7);
+    bbtkBlackBoxDebugMessage("object",4,"<== BlackBox::~BlackBox() ["<<bbmName
+		     <<"]"<<std::endl);
   }
   //=========================================================================
 
-  //=========================================================================
-  /// Destruction method of a black box
-  void BlackBox::bbDelete()
-  {
-    bbtkDebugMessage("Kernel",5,"BlackBox::bbDelete() ["
-		     <<bbGetFullName()<<"]"<<std::endl);    
-    this->bbUserDelete();
-  }
-  //=========================================================================
 
 
-  //=========================================================================
-  /// Main processing method of the box.
-  void BlackBox::bbExecute(bool force)
-  {
-    bbtkDebugMessageInc("Process",1,
-			"=> BlackBox::bbExecute() ["
-			<<bbGetFullName()<<"]"<<std::endl);
-
-    Wx::BeginBusyCursor();
-
-    // If execution frozen : return
-    if (bbGlobalGetFreezeExecution()) 
-      {
-	bbtkDebugMessage("Process",1,
-			 " -> FreezeExecution global flag is 'true' : abort execution"<<std::endl);
-      }
-
-    // If force is true then update is triggered even if the box is UPTODATE
-    if (force) bbSetModifiedStatus();
-
-    // Calls the main recursive update method 
-    bbBackwardUpdate(0);
-
-    Wx::EndBusyCursor();
-
-    bbtkDebugMessageDec("Process",1,
-			"<= BlackBox::bbExecute() ["
-			<<bbGetFullName()<<"]"<<std::endl);
-  }
-  //=========================================================================
-
   //=========================================================================
   std::string BlackBox::bbGetFullName() const
   { 
-    return bbGetNameWithParent()+"<"+this->bbGetDescriptor()->GetTypeName()+">";
+    return this->bbGetNameWithParent()+"<"+this->bbGetDescriptor()->GetTypeName()+">";
   }
   //=========================================================================
      
 
 
   //=========================================================================
-  /// Returns the name with the name of the parent prepended if any
   std::string BlackBox::bbGetNameWithParent() const
   {
-    if (bbmParent) 
+    if (bbmParent.lock()) 
       {
-	return bbmParent->bbGetNameWithParent() + ":" + bbmName;
+	return bbmParent.lock()->bbGetNameWithParent() + ":" + bbmName;
       }
     else 
       {
@@ -137,7 +191,6 @@ namespace bbtk
   //=========================================================================
 
   //=========================================================================
-  /// Prints the Help on the BlackBox type 
   void BlackBox::bbGetHelp(bool full) const
   {
     bbGetDescriptor()->GetHelp(full); 
@@ -146,98 +199,97 @@ namespace bbtk
 
 
   //=========================================================================
-  /// Returns true if the UserBlackBox has an input of name name
   bool BlackBox::bbHasInput(const std::string& name) const
   {
-    bbtkDebugMessageInc("Kernel",8,
+    bbtkBlackBoxDebugMessage("kernel",8,
 			"BlackBox::bbHasInput(\""
-			<<name<<"\") ["<<bbGetFullName()<<"]"
+			<<name<<"\")"
 			<<std::endl);
     bool r = ( bbGetDescriptor()->GetInputDescriptorMap().find(name)
 	       != bbGetDescriptor()->GetInputDescriptorMap().end());
-    bbtkDebugDecTab("Kernel",8);
+    bbtkDebugDecTab("kernel",8);
     return r;
   }
   //=========================================================================
 
 
   //=========================================================================  
-  /// Returns true if the UserBlackBox has an output of name name
   bool BlackBox::bbHasOutput(const std::string& name) const
   {
-    bbtkDebugMessageInc("Kernel",8,"BlackBox::bbHasOutput(\""
-			<<name<<"\") ["<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("kernel",8,"BlackBox::bbHasOutput(\""
+			     <<name<<"\")"
+			     <<std::endl);
     bool r = ( bbGetDescriptor()->GetOutputDescriptorMap().find(name)
 	       != bbGetDescriptor()->GetOutputDescriptorMap().end());
-    bbtkDebugDecTab("Kernel",8);
+    bbtkDebugDecTab("kernel",8);
     return r;
   }
   //=========================================================================
 
 
   //=========================================================================  
-  ///  Gets the output type of a given name
   TypeInfo BlackBox::bbGetOutputType( const std::string &name ) const 
   {
-    bbtkDebugMessageInc("Kernel",8,
-			"BlackBox::bbGetOutputType(\""
-			<<name<<"\") ["<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("kernel",8,
+			     "BlackBox::bbGetOutputType(\""
+			     <<name<<"\")"
+			     <<std::endl);
     TypeInfo r = bbGetDescriptor()->GetOutputDescriptor(name)->GetTypeInfo();
-    bbtkDebugDecTab("Kernel",8); 
+    bbtkDebugDecTab("kernel",8); 
     return r;
   }
   //=========================================================================
 
   //=========================================================================
-  ///  Gets the input type of a given name
   TypeInfo BlackBox::bbGetInputType( const std::string &name ) const
   {
-    bbtkDebugMessageInc("Kernel",8,
-			"BlackBox::bbGetInputType(\""
-			<<name<<"\") ["<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("kernel",8,
+			     "BlackBox::bbGetInputType(\""
+			     <<name<<"\")"
+			     <<std::endl);
     TypeInfo r = bbGetDescriptor()->GetInputDescriptor(name)->GetTypeInfo();
-    bbtkDebugDecTab("Kernel",8);
+    bbtkDebugDecTab("kernel",8);
     return r;
   }
   //=========================================================================
 
 
   //=========================================================================
-  /// Allocates the i/o connectors of the black box
   void BlackBox::bbAllocateConnectors()
   {  
-    bbtkDebugMessageInc("Kernel",8,
-			"BlackBox::bbAllocateConnectors() ["
-			<<bbGetFullName()<<"]"
+    bbtkBlackBoxDebugMessage("kernel",8,
+			"BlackBox::bbAllocateConnectors()"
 			<<std::endl);					
+
+    MakeBlackBoxPointer(this,true);
+
     const BlackBoxDescriptor::InputDescriptorMapType& imap 
       = bbGetDescriptor()->GetInputDescriptorMap(); 
     BlackBoxDescriptor::InputDescriptorMapType::const_iterator i;	
     for ( i = imap.begin(); i != imap.end(); ++i )			
       {									
-	bbtkDebugMessage("Kernel",8,"* Allocate \""<<i->first<<"\""<<std::endl);
+	bbtkBlackBoxDebugMessage("kernel",8,"* Allocate \""<<i->first<<"\""<<std::endl);
 	bbGetInputConnectorMap()[i->second->GetName()] 
-	  = new BlackBoxInputConnector(this);
+	  = new BlackBoxInputConnector(GetThisPointer<BlackBox>());
       }									
     const BlackBoxDescriptor::OutputDescriptorMapType& omap 
       = bbGetDescriptor()->GetOutputDescriptorMap();		       
     BlackBoxDescriptor::OutputDescriptorMapType::const_iterator o; 
     for ( o = omap.begin(); o != omap.end(); ++o )
       {							
-	bbtkDebugMessage("Kernel",8,"* Allocate \""<<o->first<<"\""<<std::endl);
+	bbtkBlackBoxDebugMessage("kernel",8,"* Allocate \""<<o->first<<"\""<<std::endl);
 	bbGetOutputConnectorMap()[o->second->GetName()] 
-	  = new BlackBoxOutputConnector();
+	  = new BlackBoxOutputConnector(GetThisPointer<BlackBox>());
       }
-    bbtkDebugDecTab("Kernel",8);  
+
   }
   //=========================================================================
 
 
   //=========================================================================
-  /// Desallocates the i/o connectors of the black box
   void BlackBox::bbDesallocateConnectors()
   {
-    bbtkDebugMessageInc("Kernel",8,
+    bbtkBlackBoxDebugMessage("kernel",8,
 			"BlackBox::bbDesallocateConnectors()"
 			<<std::endl);					
 
@@ -245,31 +297,30 @@ namespace bbtk
     for ( i = bbGetInputConnectorMap().begin();
 	  i != bbGetInputConnectorMap().end(); ++i )		       
       {									
-	bbtkDebugMessage("Kernel",8,"* Delete \""<<i->first<<"\""<<std::endl);
+	bbtkBlackBoxDebugMessage("kernel",8,"* Delete \""<<i->first<<"\""<<std::endl);
 	delete (i->second);
       }									
     OutputConnectorMapType::const_iterator o;	
     for ( o = bbGetOutputConnectorMap().begin(); 
 	  o != bbGetOutputConnectorMap().end(); ++o )			
       {									
-	bbtkDebugMessage("Kernel",8,"* Delete \""<<o->first<<"\""<<std::endl);	       
+	bbtkBlackBoxDebugMessage("kernel",8,"* Delete \""<<o->first<<"\""<<std::endl);	       
 	delete (o->second);
       }									
    
-    bbtkDebugDecTab("Kernel",8);  
+    bbtkDebugDecTab("kernel",8);  
 
   }
   //=========================================================================
 
 
   //=========================================================================
-  /// Copies the input / output values from another box
   void BlackBox::bbCopyIOValues(BlackBox& from)
   {
-    bbtkDebugMessageInc("Kernel",9,
-    			"BlackBox::bbCopyIOValues("
-			<<from.bbGetFullName()<<") ["
-			<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("kernel",1,
+			     "BlackBox::bbCopyIOValues("
+			     <<from.bbGetFullName()<<")"
+			     <<std::endl);
     // copies the input values
     const BlackBoxDescriptor::InputDescriptorMapType& imap 
       = bbGetDescriptor()->GetInputDescriptorMap(); 
@@ -278,6 +329,7 @@ namespace bbtk
       {		
 	if (! i->second->GetCopyConstruct() ) continue;
 	std::string input = i->second->GetName();
+	bbtkBlackBoxDebugMessage("kernel",2,"* Copying input "<<input<<std::endl);
 	this->bbSetInput(input, from.bbGetInput(input) );
       }									
     // copies the output values
@@ -288,10 +340,11 @@ namespace bbtk
       {							
 	if (! o->second->GetCopyConstruct() ) continue;
 	std::string output = o->second->GetName();
+	bbtkBlackBoxDebugMessage("kernel",2,"* Copying output "<<output<<std::endl);
 	this->bbSetOutput(output, from.bbGetOutput(output) );
       }
 
-    bbtkDebugDecTab("Kernel",9);
+    bbtkDebugDecTab("kernel",9);
 
   }
   //=========================================================================
@@ -302,7 +355,7 @@ namespace bbtk
   bool BlackBox::bbCanReact() const 
   { 
     return ( bbGlobalGetSomeBoxExecuting() 
-#ifdef _USE_WXWIDGETS_
+#ifdef USE_WXWIDGETS
 	     || Wx::IsSomeWindowAlive() 
 #endif
 	     ); 
@@ -311,20 +364,6 @@ namespace bbtk
 
 
 
-  //=========================================================================
-  /// User overloadable destruction method of a black box
-  void BlackBox::bbUserDelete() 
-  {   
-    bbtkDebugMessage("Process",5,
-		     "=> BlackBox::bbUserDelete() ["
-		     <<bbGetFullName()<<"]"
-		     <<" : not overloaded; using standard deletion"
-		     <<std::endl);
-    delete this;
-  }
-  //=========================================================================
-
-
   //=========================================================================
   BlackBox::BoxProcessModeValue BlackBox::bbGetBoxProcessModeValue() const
   {
@@ -337,12 +376,20 @@ namespace bbtk
 	 (p == "Always") || (p == "always") ) return Always;
     if ( (p == "2") ||
 	 (p == "R") || (p == "r") ||
-	 (p == "Reactive") || (p == "reactive") ) return Reactive;
+	 (p == "Reactive") || (p == "reactive") ) 
+		return Reactive;
+    /*
+    if ( (p == "3") ||
+	 (p == "F") || (p == "f") ||
+	 (p == "Flash") || (p == "flash") ) return Flash;
+    */
     bbtkError(bbGetFullName()<<" : BoxProcessMode value '"<<p
 	      <<"' unknown. Possible values : "
 	      <<"'0'/'P'/'p'/'Pipeline'/'pipeline' | "
 	      <<"'1'/'A'/'a'/'Always'/'always' | "
-	      <<"'2'/'R'/'r'/'Reactive'/'reactive'"<<std::endl);
+	      <<"'2'/'R'/'r'/'Reactive'/'reactive'"
+	      //      <<"'3'/'F'/'f'/'Flash'/'flash'"
+	      <<std::endl);
   }
   //=========================================================================
   
@@ -360,127 +407,153 @@ namespace bbtk
   }
   //=========================================================================
 
+
+
+
   //=========================================================================
-  ///  Signals that the BlackBox has been modified
-  void BlackBox::bbSetModifiedStatus(BlackBoxInputConnector* c)
+  void BlackBox::bbAddOutputObserver(const std::string& output, 
+				   OutputChangeCallbackType f)
   {
-    bbtkDebugMessageInc("Process",5,
-			"=> BlackBox::bbSetModifiedStatus("<<c<<") ["
-			<<bbGetFullName()<<"]"<<std::endl);
-   
-    if ( (c==bbGetInputConnectorMap().find("WinHide")->second) )
-	 //	 && (bbCanReact()))
+    bbGetOutputConnector(output).AddChangeObserver(f);
+  }  
+  //=========================================================================
+
+  //=========================================================================
+  void BlackBox::bbRemoveOutputObserver(const std::string& output_name, 
+				      OutputChangeCallbackType f)
+  {
+    bbtkError("BlackBox::RemoveChangeObserver NOT IMPLEMENTED");
+  }
+  //=========================================================================
+
+
+  //=========================================================================
+  void BlackBox::bbSetStatusAndPropagate(BlackBoxInputConnector* c,
+					 IOStatus s)
+  {
+    bbtkBlackBoxDebugMessage("change",5,
+			     "=> BlackBox::bbSetStatusAndPropagate(input,"
+			     <<GetIOStatusString(s)<<")"
+			     <<std::endl);
+
+    if (s==UPTODATE) bbtkError("bbSetStatusAndPropagate with status UPTODATE!");
+    c->SetStatus(s);
+
+    // Flash reaction
+    /*
+    if (bbGetBoxProcessModeValue() == Flash)
       {
-	bbtkDebugMessage("Process",9,
-			 "-> Hide triggered by WinHide input change"
-			 <<std::endl);
-	this->bbHideWindow();
-	this->bbSetStatus(MODIFIED); 
-	return;
+	this->bbExecute();
       }
- 
+    */
+
+    OutputConnectorMapType::const_iterator o;	
+    for ( o = bbGetOutputConnectorMap().begin(); 
+	  o != bbGetOutputConnectorMap().end(); ++o )			
+      {									
+	if (o->second->GetStatus()==UPTODATE) 
+	  {
+	    o->second->SetStatus(OUTOFDATE);
+	    o->second->SignalChange(GetThisPointer<BlackBox>(),o->first); 
+	  }
+	}								
+    
     if ( ( bbBoxProcessModeIsReactive()  ||
 	   (c==bbGetInputConnectorMap().find("BoxExecute")->second))
 	 && (bbCanReact() ) )
       {
-	bbtkDebugMessage("Process",9,
+	bbtkBlackBoxDebugMessage("change",2,
 			 "-> Execution triggered by Reactive mode or BoxExecute input change"<<std::endl);
-	this->bbSetStatus(MODIFIED); 
-        bbGlobalAddToExecutionList( this );
-      }
-    else if ( bbGetStatus() == MODIFIED ) //! this->bbIsUptodate()) 
-      { 
-	bbtkDebugMessage("Process",5,"-> Already modified"<<std::endl);
-	bbtkDebugDecTab("Process",5);
-	return;
-      }
-    else 
-      {
-	bbtkDebugMessage("Process",5,"-> Status set to modified"<<std::endl);
-	bbtkDebugDecTab("Process",5);
-	this->bbSetStatus(MODIFIED); 
-      }
- 
-    this->bbSignalOutputModification(false);
-
-   bbtkDebugMessageDec("Process",5,
-			"<= BlackBox::bbSetModifiedStatus("<<c<<") ["
-			<<bbGetFullName()<<"]"<<std::endl);
-  }  
+        bbGlobalAddToExecutionList( GetThisPointer<BlackBox>() );
+      }    
+    bbtkBlackBoxDebugMessage("change",5,
+			     "<= BlackBox::bbSetStatusAndPropagate(input)"
+			     <<std::endl);
+  }
   //=========================================================================
 
+
   //=========================================================================  
   void BlackBox::bbSignalOutputModification(bool reaction)
   {
-    bbtkDebugMessageInc("Process",5,
-			"=> BlackBox::bbSignalOutputModification() ["
-			<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("change",5,
+			     "=> BlackBox::bbSignalOutputModification("
+			     <<reaction<<")"
+			     <<"]"<<std::endl);
     
-    OutputConnectorMapType::iterator change = bbGetOutputConnectorMap().end();
     OutputConnectorMapType::iterator i;
     for ( i  = bbGetOutputConnectorMap().begin(); 
-	  i != bbGetOutputConnectorMap().end(); ++i) {
-      /*     if ( i->first == "BoxChange" ) 
-	{
-	  change = i;
-	  continue;
-	}
-      */
-      i->second->SetModifiedStatus();
-    } 
-    //    if (change != bbGetOutputConnectorMap().end()) 
-    // change->second->SetModifiedStatus();
+	  i != bbGetOutputConnectorMap().end(); ++i) 
+      {
+	//	std::cout << "Stat = "
+	//<<GetIOStatusString(i->second->GetStatus())
+	//		  <<std::endl;
+	// LG : CANNOT SIGNAL ONLY WHEN UPTODATE 
+	// See bbtkSampleOutputObserver
+	//	if (i->second->GetStatus()==UPTODATE) 
+	//	  {
+	    i->second->SignalChange(GetThisPointer<BlackBox>(),i->first); 
+	    //	  }
+      } 
 
     if (reaction) bbGlobalProcessExecutionList();
 
-    bbtkDebugMessageDec("Process",5,
-			"<= BlackBox::bbSignalOutputModification() ["
-			<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("change",5,
+			     "<= BlackBox::bbSignalOutputModification()"
+			     <<std::endl);
     
   }  
   //=========================================================================   
   //=========================================================================  
   void BlackBox::bbSignalOutputModification(const std::string& output,
-	bool reaction)
+					    bool reaction)
   {
-    bbtkDebugMessageInc("Process",5,
-			"=> BlackBox::bbSignalOutputModification("
-			<<output<<") ["
-			<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("change",5,
+			     "=> BlackBox::bbSignalOutputModification("
+			     <<output<<","<<reaction<<")"
+			     <<std::endl);
     
-    OutputConnectorMapType::iterator i = bbGetOutputConnectorMap().find(output);
+    OutputConnectorMapType::iterator i = 
+      bbGetOutputConnectorMap().find(output);
+
+
     if ( i == bbGetOutputConnectorMap().end() ) 
 	{
 	  bbtkError("BlackBox["<<bbGetFullName()<<"]::bbSignalOutputModification("<<output<<") : unknown output");
 	}
-    i->second->SetModifiedStatus();
-    // Has to notify the output "BoxChange" also
-    if (output != "BoxChange") 
-      {
-	i = bbGetOutputConnectorMap().find("BoxChange");
-	if ( i != bbGetOutputConnectorMap().end() ) 
+
+    //    if (i->second->GetStatus()==UPTODATE) 
+    //      {
+	i->second->SignalChange(GetThisPointer<BlackBox>(),i->first); 
+	// Has to notify the output "BoxChange" also
+	if (output != "BoxChange") 
 	  {
-	    i->second->SetModifiedStatus();
+	    i = bbGetOutputConnectorMap().find("BoxChange");
+	    if ( i != bbGetOutputConnectorMap().end() ) 
+	      {
+		i->second->SignalChange(GetThisPointer<BlackBox>(),i->first); 
+	      }
 	  }
-      }
-  if (reaction) bbGlobalProcessExecutionList();
-
-    bbtkDebugMessageDec("Process",5,
-			"<= BlackBox::bbSignalOutputModification("
-			<<output<<") ["
-			<<bbGetFullName()<<"]"<<std::endl);
+	if (reaction) bbGlobalProcessExecutionList();
+	//      }
 
+	bbtkBlackBoxDebugMessage("change",5,
+			     "<= BlackBox::bbSignalOutputModification("
+			     <<output<<")"
+			     <<std::endl);
+    
   }  
   //=========================================================================   
   //=========================================================================  
   void BlackBox::bbSignalOutputModification(const std::vector<std::string>& output,
 	bool reaction)
   {
-    bbtkDebugMessageInc("Process",5,
-			"=> BlackBox::bbSignalOutputModification(vector of outputs) ["
-			<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("change",5,
+			"=> BlackBox::bbSignalOutputModification(vector of outputs)"
+<<std::endl);
     OutputConnectorMapType::iterator i;
     std::vector<std::string>::const_iterator o;
+    bool changed = false;
     for (o=output.begin();o!=output.end();++o) 
       {
 	// the output "BoxChange" must be signaled **AFTER** all others
@@ -491,92 +564,305 @@ namespace bbtk
 	  {
 	    bbtkError("BlackBox["<<bbGetFullName()<<"]::bbSignalOutputModification("<<*o<<") : unknown output");
 	  }
-	i->second->SetModifiedStatus();
+
+	//	if (i->second->GetStatus()==UPTODATE)
+	//	  {
+	    i->second->SignalChange(GetThisPointer<BlackBox>(),i->first); 
+	    changed = true;
+	    //  }
       }
     // Has to notify the output "BoxChange" also
     i = bbGetOutputConnectorMap().find("BoxChange");
-    if ( i != bbGetOutputConnectorMap().end() ) 
+    if ( changed && (i != bbGetOutputConnectorMap().end())) 
       {
-	i->second->SetModifiedStatus();
+	// if (i->second->GetStatus()==UPTODATE) 
+	//	  {
+	    i->second->SignalChange(GetThisPointer<BlackBox>(),i->first); 
+	    if (reaction) bbGlobalProcessExecutionList();
+	    //  }
       }
-  if (reaction) bbGlobalProcessExecutionList();
 
-   bbtkDebugMessageDec("Process",5,
-		       "<= BlackBox::bbSignalOutputModification(vector of outputs) ["
-			<<bbGetFullName()<<"]"<<std::endl);
+    bbtkBlackBoxDebugMessage("change",5,
+			     "<= BlackBox::bbSignalOutputModification(vector of outputs)"
+			     <<std::endl);
 
   }  
   //=========================================================================   
 
+
+
+
+
+
+
+  //=========================================================================
+  /// Main processing method of the box.
+  void BlackBox::bbExecute(bool force)
+  {
+    bbtkBlackBoxDebugMessage("process",2,
+			     "=> BlackBox::bbExecute("<<(int)force<<")"
+			     <<std::endl);
+ 
+    // If already executing : return
+    /*
+    if (bbGetExecuting()) 
+      {
+	bbtkBlackBoxDebugMessage("process",2,
+			 " -> already executing : abort"<<std::endl);
+	return;
+      }
+    */
+
+    // If execution frozen : return
+    if (bbGlobalGetFreezeExecution()) 
+      {
+	bbtkBlackBoxDebugMessage("process",2,
+			 " -> FreezeExecution global flag is 'true' : abort execution"<<std::endl);
+      }
+
+    BBTK_BUSY_CURSOR;
+
+    // If force is true then update is triggered even if the box is UPTODATE
+    //    if (force) bbSetModifiedStatus();
+
+    // Calls the main recursive execution method 
+    bbRecursiveExecute(Connection::Pointer());
+
+    bbtkBlackBoxDebugMessage("process",2,
+			     "<= BlackBox::bbExecute()"
+			     <<std::endl);
+  }
+  //=========================================================================
+
+  //=========================================================================
+  void BlackBox::bbInitializeProcessing()
+  {
+    if (!bbmInitialized) 
+      {
+	bbtkBlackBoxDebugMessage("process",2,"** Initialize processing"
+				 <<std::endl);
+	this->bbRecursiveInitializeProcessing();
+	bbmInitialized = true;
+      }
+  }
+  //=========================================================================
+
+  //=========================================================================
+  void BlackBox::bbFinalizeProcessing()
+  {
+    if (bbmInitialized) 
+      {
+	bbtkBlackBoxDebugMessage("process",2,"** Finalize processing"
+				 <<std::endl);
+	this->bbRecursiveFinalizeProcessing();
+	bbmInitialized = false;
+      }
+  }
+  //=========================================================================
+
+  
+  //=========================================================================
+  void BlackBox::bbRecursiveExecute( Connection::Pointer caller )
+  {
+    bbtkBlackBoxDebugMessage("process",3,
+			"=> BlackBox::bbRecursiveExecute("
+			<<(caller?caller->GetFullName():"0")<<")"
+			<<std::endl);
+
+    // If already executing : return
+    if (bbGetExecuting()) 
+      {
+	bbtkBlackBoxDebugMessage("process",3,
+			 " -> already executing : abort"<<std::endl);
+	return; 
+      }
+    
+    // If not initialized do it
+    bbInitializeProcessing();
+
+    bbSetExecuting(true);
+    bool wasExecuting = bbGlobalGetSomeBoxExecuting();
+    bbGlobalSetSomeBoxExecuting(true);
+    
+    // Creates the window if the black box has one
+    this->bbCreateWindow();
+    
+    // Updates its inputs
+    IOStatus s = bbUpdateInputs();
+    
+    if ( (s != UPTODATE) ||
+	 bbBoxProcessModeIsAlways() )
+      {
+	  // Displays the window (WxBlackbox)
+ 	  //	bbShowWindow(caller);
+
+	  // Actual processing (virtual)
+	  this->bbProcess();
+	
+	
+	  // Update the I/O statuses
+	  bbComputePostProcessStatus();
+      }
+    else 
+      {
+	// Test output status...
+	OutputConnectorMapType::iterator o;
+	for ( o = bbGetOutputConnectorMap().begin(); 
+	      o!= bbGetOutputConnectorMap().end(); ++o) 
+	  {
+	    if (o->second->GetStatus() != UPTODATE)
+	      {
+		bbtkWarning("BlackBox::bbRecursiveExecute: "
+			    <<"all inputs are Up-to-date but output '"
+			    <<o->first<<"' is Out-of-date ???");
+	      }
+	  }
+	
+        bbtkBlackBoxDebugMessage("process",3," -> Up-to-date : nothing to do"
+			 <<std::endl);
+      }
+
+    // Shows the window if the black box has one
+    this->bbShowWindow(); 
+
+	  
+    bbtkBlackBoxDebugMessage("process",3,
+            "<= BlackBox::bbRecursiveExecute()"
+            <<std::endl);
+
+    bbSetExecuting(false);
+    bbGlobalSetSomeBoxExecuting(wasExecuting);
+
+    return; 
+
+  }
   //=========================================================================
-  /// Updates the BlackBox inputs
-  /// \returns UPTODATE if all inputs are in UPTODATE status after update
-  ///          else MODIFIED 
-  IOStatus BlackBox::bbUpdateInputs(bool excludeParent)
+  
+   
+
+
+
+  //=========================================================================
+  IOStatus BlackBox::bbUpdateInputs()
   {
-    bbtkDebugMessageInc("Process",4,
-			"=> BlackBox::bbUpdateInputs() ["
-			<<bbGetFullName()<<"]"
+    bbtkBlackBoxDebugMessage("process",4,
+			"=> BlackBox::bbUpdateInputs()"
 			<<std::endl);	
 
     IOStatus s = UPTODATE;
-    
+
     InputConnectorMapType::iterator i;
     for ( i = bbGetInputConnectorMap().begin(); 
 	  i!= bbGetInputConnectorMap().end(); ++i) 
       {
-	if (excludeParent && (i->first=="WinParent")) continue;
-	if (i->first=="WinHide") continue;
+	//	if (i->first=="WinHide") continue;
 	// If input type is Void : no recurse
 	//if (  bbGetDescriptor()->GetInputDescriptor(i->first)->GetTypeInfo() 
 	//      == typeid(Void) ) 
 	//  continue;
-
-	IOStatus t = i->second->BackwardUpdate();
-	if (t==MODIFIED) s = MODIFIED;
+	bbtkBlackBoxDebugMessage("change",2,
+			    "Input '"<<i->first
+			    <<"': status before update = '"
+			    <<GetIOStatusString(i->second->GetStatus())
+			    <<"'"<<std::endl);
+	i->second->RecursiveExecute();
+	IOStatus t = i->second->GetStatus();
+	if (t > s) s = t;
+	bbtkBlackBoxDebugMessage("change",2,
+				 "Input '"<<i->first
+				 <<"': status before process = '"
+				 <<GetIOStatusString(i->second->GetStatus())
+				 <<"'"<<std::endl);
       }
     
-   bbtkDebugMessageDec("Process",4,
-			"<= BlackBox::bbUpdateInputs() ["
-			<<bbGetFullName()<<"]"
+    bbtkBlackBoxDebugMessage("process",4,
+			"<= BlackBox::bbUpdateInputs()"
 			<<std::endl);	
-
-
+    
+    
     return s;
   }
   //=========================================================================
 
- 
+  //==================================================================
+   void BlackBox::bbComputePostProcessStatus()
+  {
+    bbtkBlackBoxDebugMessage("process",4,
+			"=> BlackBox::bbComputePostProcessStatus()"
+			<<std::endl);	
+
+    IOStatus new_output_status = UPTODATE;
+    if (bbBoxProcessModeIsAlways()) new_output_status = OUTOFDATE;
+
+    // Update the input statuses
+    InputConnectorMapType::iterator i;
+    for ( i = bbGetInputConnectorMap().begin(); 
+	  i!= bbGetInputConnectorMap().end(); ++i) 
+      {
+	IOStatus t = i->second->GetStatus();
+	if (t == OUTOFDATE) new_output_status = OUTOFDATE;
+	// A previously MODIFIED status turns to UPTODATE
+	if (t==MODIFIED) i->second->SetStatus(UPTODATE);
+	bbtkBlackBoxDebugMessage("change",2,
+			 "Input '"<<i->first<<"' : "
+			 << GetIOStatusString(t) << " -> "
+			 << GetIOStatusString(i->second->GetStatus())
+			 << std::endl);
+      }
+    bbtkBlackBoxDebugMessage("change",2,
+			     "New output status : "
+			     << GetIOStatusString(new_output_status)
+			     <<std::endl);
+    // Update the output statuses
+    OutputConnectorMapType::iterator o;
+    for ( o = bbGetOutputConnectorMap().begin(); 
+	  o!= bbGetOutputConnectorMap().end(); ++o) 
+      {
+	o->second->SetStatus(new_output_status);
+      }
+
+    bbtkBlackBoxDebugMessage("process",4,
+			"<= BlackBox::bbComputePostProcessStatus()"
+			<<std::endl);	
+
+  }
+  //==================================================================
+
   //=========================================================================
-  /// Connects the input <name> to the connection c
   void BlackBox::bbConnectInput( const std::string& name, Connection* c)
   {
-    bbtkDebugMessageInc("Kernel",7,
-			"BlackBox::bbConnectInput(\""<<name<<"\","<<c<<") ["
-			<<bbGetFullName()<<"]"
+    bbtkBlackBoxDebugMessage("connection",2,
+			"==> BlackBox::bbConnectInput(\""
+			<<name<<"\","<<c->GetFullName()<<")"
 			<<std::endl);       
+
+
     InputConnectorMapType::iterator i = bbGetInputConnectorMap().find(name);
     if (i==bbGetInputConnectorMap().end())
       {
 	bbtkError("no input called '"<<name<<"'");
       }
     i->second->SetConnection(c);
+    // The input *MUST* be set OUTOFDATE to update its input on next execution
+    bbSetStatusAndPropagate(i->second,OUTOFDATE);
     
-    //  bbSetModifiedStatus();
+    bbtkBlackBoxDebugMessage("connection",2,
+			"<== BlackBox::bbConnectInput(\""
+			<<name<<"\","<<c->GetFullName()<<")"
+			<<std::endl);       
 
-    bbtkDebugDecTab("Kernel",7);
   }
   //=========================================================================
 
 
   //=========================================================================  
-  /// Connects the output <name> to the connection c
   void BlackBox::bbConnectOutput( const std::string& name, Connection* c)
   {
-    bbtkDebugMessageInc("Kernel",7,
-			"BlackBox::bbConnectOutput(\""<<name<<"\","<<c<<") ["
-			<<bbGetFullName()<<"]"<<std::endl);       
-
+    bbtkBlackBoxDebugMessage("connection",2,
+			     "==> BlackBox::bbConnectOutput(\""<<name<<"\","
+			     <<c->GetFullName()<<")"
+			     <<std::endl);       
+    
     OutputConnectorMapType::iterator i = bbGetOutputConnectorMap().find(name);
     if (i==bbGetOutputConnectorMap().end())
       {
@@ -584,20 +870,30 @@ namespace bbtk
       }
     i->second->SetConnection(c);
 
-    bbtkDebugDecTab("Kernel",7);
+    bbtkBlackBoxDebugMessage("connection",2,
+			     "<== BlackBox::bbConnectOutput(\""<<name<<"\","
+			     <<c->GetFullName()<<")"
+			     <<std::endl);       
+
   }
   //=========================================================================
 
 
   //=========================================================================
-  /// Disconnects the input <name> from the connection c
-  void BlackBox::bbDisconnectInput( const std::string& name, Connection* c)
+   void BlackBox::bbDisconnectInput( const std::string& name, Connection* c)
   {
-    bbtkDebugMessageInc("Kernel",7,
-			"BlackBox::bbDisconnectInput(\""<<name
-			<<"\","<<c<<") ["
-			<<bbGetFullName()<<"]"
-			<<std::endl);      
+
+    bbtkBlackBoxDebugMessage("connection",2,
+		     "==> BlackBox::bbDisconnectInput(\""<<name
+		     <<"\","<<c->GetFullName()<<")"
+		     <<std::endl);      
+
+    if (!c) 
+      {
+
+	bbtkBlackBoxDebugMessage("connection",2,"c==0"<<std::endl);	
+	return;
+      }
 
     InputConnectorMapType::iterator i = bbGetInputConnectorMap().find(name);
     if (i==bbGetInputConnectorMap().end())
@@ -606,20 +902,28 @@ namespace bbtk
       }
     i->second->UnsetConnection(c);
 
-    bbtkDebugDecTab("Kernel",7);
+    bbtkBlackBoxDebugMessage("connection",2,
+		     "<== BlackBox::bbDisconnectInput(\""<<name
+		     <<"\","<<c->GetFullName()<<")"
+		     <<std::endl);      
+
   }
   //=========================================================================
 
 
   //=========================================================================
-  /// Disconnects the output <name> from the connection c
-  void BlackBox::bbDisconnectOutput( const std::string& name, Connection* c)
+   void BlackBox::bbDisconnectOutput( const std::string& name, Connection* c)
   {
-    bbtkDebugMessageInc("Kernel",7,
-			"BlackBox::bbDisconnectOutput(\""<<name
-			<<"\","<<c<<") ["
-			<<bbGetFullName()<<"]"
-			<<std::endl);       
+    bbtkBlackBoxDebugMessage("connection",2,
+		     "==> BlackBox::bbDisconnectOutput(\""<<name
+		     <<"\","<<c->GetFullName()<<")"
+		     <<std::endl);       
+    if (!c) 
+      {
+
+	bbtkBlackBoxDebugMessage("connection",2,"c==0"<<std::endl);	
+	return;
+      }
 
     OutputConnectorMapType::iterator i = bbGetOutputConnectorMap().find(name);
     if (i==bbGetOutputConnectorMap().end())
@@ -628,13 +932,36 @@ namespace bbtk
       }
     i->second->UnsetConnection(c);
 
-    bbtkDebugDecTab("Kernel",7);
+    bbtkBlackBoxDebugMessage("connection",2,
+		     "<== BlackBox::bbDisconnectOutput(\""<<name
+		     <<"\","<<c->GetFullName()<<")"
+		     <<std::endl);       
   } 
   //=========================================================================
  
 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
   //=========================================================================
-  /// Virtual
   void BlackBox::bbWriteDotInputOutputName(FILE *ff,bool inputoutput,int detail, int level)
   {
     fprintf(ff,"%s%p",bbGetTypeName().c_str(),this);
@@ -649,28 +976,40 @@ namespace bbtk
     // Looks for the adaptor
     if (bbGetOutputType(output).name() != typeid(std::string).name() ) 
       {
-	BlackBox* a = 0;
-	try
+	// Look for factory 
+	Package::Pointer p = bbGetDescriptor()->GetPackage();
+	if ((p != 0) && ( ! p->GetFactorySet().empty() ) )
 	  {
-	    a = NewAdaptor(  
-			   bbGetOutputType(output),
-			   typeid(std::string),
-			   "");
-	  } catch (bbtk::Exception e) 
+	    Factory::Pointer f = p->GetFactorySet().begin()->lock();
+	    BlackBox::Pointer a;
+	    try
+	      {
+		a = f->NewAdaptor(  
+				  bbGetOutputType(output),
+				  typeid(std::string),
+				  "");
+	      } catch (bbtk::Exception e) 
+	      {
+	      }
+	    if (a){
+	      //			bbUpdate();
+	      a->bbSetInput("In",bbGetOutput(output));
+	      a->bbExecute();
+	      v = a->bbGetOutput("Out").unsafe_get<std::string>() ;
+	    } else {
+	      v="? (no adaptor found)";
+	    }
+	  }
+	else 
 	  {
+	    v="? (no factory found)";
 	  }
-	if (a!=NULL){
-	  //			bbUpdate();
-	  a->bbSetInput("In",bbGetOutput(output));
-	  a->bbExecute();
-	  v = a->bbGetOutput("Out").unsafe_get<std::string>() ;
-	} else {
-	  v="? (no adaptor found)";
-	}
-      } else {
-      //         bbUpdate();
-      v = bbGetOutput(output).unsafe_get<std::string>() ;
-    }
+      } 
+    else 
+      {
+	//         bbUpdate();
+	v = bbGetOutput(output).unsafe_get<std::string>() ;
+      }
     return v;
   }
   //=========================================================================
@@ -682,28 +1021,38 @@ namespace bbtk
     // Looks for the adaptor
     if (bbGetInputType(input) != typeid(std::string)) 
       {
-	BlackBox* a = 0;
-	try
+	// Look for factory 
+	Package::Pointer p = bbGetDescriptor()->GetPackage();
+	if ((p != 0) && ( ! p->GetFactorySet().empty() ) )
 	  {
-	    a = NewAdaptor(  
-			   bbGetInputType(input),
-			   typeid(std::string),
-			   "");
-	  }catch (bbtk::Exception e) 
-	  {
-	  }
-	if (a!=NULL)
-	  {
-	    //			bbUpdate();
-	    a->bbSetInput("In",bbGetInput(input));
-	    a->bbExecute();
-	    v = a->bbGetOutput("Out").unsafe_get<std::string>() ;
+	    Factory::Pointer f = p->GetFactorySet().begin()->lock();
+	    BlackBox::Pointer a;
+	    try
+	      {
+		a = f->NewAdaptor(  
+			       bbGetInputType(input),
+			       typeid(std::string),
+			       "");
+	      }catch (bbtk::Exception e) 
+	      {
+	      }
+	    if (a)
+	      {
+		//			bbUpdate();
+		a->bbSetInput("In",bbGetInput(input));
+		a->bbExecute();
+		v = a->bbGetOutput("Out").unsafe_get<std::string>() ;
+	      } 
+	    else 
+	      {
+		v="? (no adaptor found)";
+	      }
 	  } 
 	else 
 	  {
-	    v="? (no adaptor found)";
+	    v="? (no factory found)";
 	  }
-      } 
+      }
     else 
       {
 	v = bbGetInput(input).unsafe_get<std::string>() ;
@@ -720,11 +1069,11 @@ namespace bbtk
     std::string ss("<");
     std::string::size_type pos = 0;
     pos = s.find(ss,0);
-    char* cr = "[";
+    std::string cr("[");
     while ( pos != std::string::npos )
       {
 	//	std::cout << "*** find one "<<std::endl;
-	s.replace(pos,1,cr,1);
+	s.replace(pos,1,cr.c_str(),1);
 	pos = s.find(ss, pos);
       } 
     ss = ">";
@@ -734,7 +1083,7 @@ namespace bbtk
     while ( pos != std::string::npos )
       {
 	//	std::cout << "*** find one "<<std::endl;
-	s.replace(pos,1,cr,1);
+	s.replace(pos,1,cr.c_str(),1);
 	pos = s.find(ss, pos);
       } 
     ss = ",";
@@ -744,7 +1093,7 @@ namespace bbtk
     while ( pos != std::string::npos )
       {
 	//	std::cout << "*** find one "<<std::endl;
-	s.replace(pos,1,cr,1);
+	s.replace(pos,1,cr.c_str(),1);
 	pos = s.find(ss, pos);
       }     //    std::cout << "AFTER=["<<s<<"]"<<std::endl;
   }
@@ -753,7 +1102,7 @@ namespace bbtk
   //=========================================================================
   /// Write Graphviz-dot description in file
   void BlackBox::bbWriteDotFileBlackBox(FILE *ff,
-					BlackBox *parentblackbox, 
+					BlackBox::Pointer parentblackbox, 
 					int detail, int level,
 					bool instanceOrtype,
 					bool relative_link )
@@ -836,26 +1185,26 @@ namespace bbtk
     //    std::cout  << labelStr << std::endl;
 
     // Relation Input
-    if (this!=parentblackbox){
+    if (GetThisPointer<BlackBox>()!=parentblackbox){
       for ( i = mInputConnectorMap.begin(); i != mInputConnectorMap.end(); ++i ) 
 	{
 	  if (i->second)
 	    {
 	      Connection* con = i->second->GetConnection();
 	      if (con!=NULL){
-		BlackBox *a=con->GetBlackBoxFrom();
-		BlackBox *b=con->GetBlackBoxTo();
+		BlackBox::Pointer a=con->GetOriginalBlackBoxFrom();
+		BlackBox::Pointer b=con->GetOriginalBlackBoxTo();
 		fprintf(ff,"  ");
 		a->bbWriteDotInputOutputName(ff,false,detail,level);
 		if (detail==1)
 		  {
-		    fprintf(ff,":%s",con->GetBlackBoxFromOutput().c_str());
+		    fprintf(ff,":%s",con->GetOriginalBlackBoxFromOutput().c_str());
 		  }
 		fprintf(ff,"->");
 		b->bbWriteDotInputOutputName(ff,true,detail,level);
 		if (detail==1)
 		  {
-		    fprintf(ff,":%s",con->GetBlackBoxToInput().c_str());
+		    fprintf(ff,":%s",con->GetOriginalBlackBoxToInput().c_str());
 		  }
 		fprintf(ff,"%s\n",";");
 	      }  // if con
@@ -869,32 +1218,45 @@ namespace bbtk
 
 
   //=========================================================================
-  void BlackBox::bbShowRelations(BlackBox *parentblackbox, 
+  void BlackBox::bbPrintHelp(BlackBox::Pointer parentblackbox, 
 				 int detail, int level
 				 /*,Factory *factory*/ )
   {
      
     if (this->bbGetDescriptor()->GetPackage()) 
       {
-	bbtkMessage("Help",1,"Black Box '"<<bbGetName()<<"' <"<<
+	bbtkBlackBoxMessage("help",1,"Black Box '"<<bbGetName()<<"' <"<<
 		    this->bbGetDescriptor()->GetPackage()->GetName()
 		    <<"::"<<this->bbGetDescriptor()->GetTypeName()<<">"<<std::endl);
       }
     else 
       {
-	bbtkMessage("Help",1,"Black Box <::"<<this->bbGetDescriptor()->GetTypeName()<<">"<<std::endl);
+	bbtkBlackBoxMessage("help",1,"Black Box <::"<<this->bbGetDescriptor()->GetTypeName()<<">"<<std::endl);
       }
-    //    bbtkMessage("Help",1," "<<GetDescription()<<std::endl);
-    //    bbtkMessage("Help",1," By : "<<GetAuthor()<<std::endl);
+    /*
+    if (bbIsUpToDate())
+      {
+	bbtkBlackBoxMessage("help",1,"Up-to-date ["<<mMaxInputChangeTime<<","
+		    <<mMinOutputChangeTime<<"]"<<std::endl);
+      }
+    else 
+      {
+	bbtkBlackBoxMessage("help",1,"Out-of-date ["<<mMaxInputChangeTime<<","
+		    <<mMinOutputChangeTime<<"]"<<std::endl);
+      }
+    */
+    //    bbtkBlackBoxMessage("help",1," "<<GetDescription()<<std::endl);
+    //    bbtkBlackBoxMessage("help",1," By : "<<GetAuthor()<<std::endl);
 
     std::vector<std::string> iname;
     std::vector<std::string> ivalue;
     std::vector<std::string> iconn;
+    std::vector<std::string> istatus;
 
     InputConnectorMapType::iterator i;
     unsigned int namelmax = 0;
     unsigned int valuelmax = 0;
-    unsigned int connlmax = 0;
+    //   unsigned int connlmax = 0;
     for ( i = mInputConnectorMap.begin(); i != mInputConnectorMap.end(); ++i ) 
       {
 	iname.push_back(i->first);
@@ -904,16 +1266,18 @@ namespace bbtk
 	std::string s("");
 	Connection* con = i->second->GetConnection();
 	if (con!=0){
-	  s = con->GetBlackBoxFrom()->bbGetName();
+	  s = con->GetOriginalBlackBoxFrom()->bbGetName();
 	  s += ".";
-	  s += con->GetBlackBoxFromOutput();
+	  s += con->GetOriginalBlackBoxFromOutput();
 	}  // if con
 	iconn.push_back(s);
+	istatus.push_back(GetIOStatusString(i->second->GetStatus()));
       }
     OutputConnectorMapType::iterator o;
     std::vector<std::string> oname;
     std::vector<std::string> ovalue;
     std::vector<std::vector<std::string> > oconn;
+    std::vector<std::string> ostatus;
     for ( o = mOutputConnectorMap.begin(); o != mOutputConnectorMap.end(); ++o ) 
       {
 	oname.push_back(o->first);
@@ -921,28 +1285,30 @@ namespace bbtk
 	ovalue.push_back(bbGetOutputAsString(o->first));
 	if (ovalue.back().size()>valuelmax) valuelmax = ovalue.back().size();
 	std::vector<std::string> ss;
-	const std::vector<Connection*>& con = o->second->GetConnectionVector();
+	const std::vector<Connection*>& con 
+	  = o->second->GetConnectionVector();
 	std::vector<Connection*>::const_iterator c;
 	for (c=con.begin();c!=con.end();++c) 
 	  {
 	    std::string s;
-	    s = (*c)->GetBlackBoxTo()->bbGetName();
+	    s = (*c)->GetOriginalBlackBoxTo()->bbGetName();
 	    s += ".";
-	    s += (*c)->GetBlackBoxToInput();
+	    s += (*c)->GetOriginalBlackBoxToInput();
 	    ss.push_back(s);
 	}  // if con
 	oconn.push_back(ss);
+	ostatus.push_back(GetIOStatusString(o->second->GetStatus()));
       }
 
     if (iname.size()) 
-      bbtkMessage("Help",1," * Inputs : "<<std::endl);
+      bbtkBlackBoxMessage("help",1," * Inputs : "<<std::endl);
     else 
-      bbtkMessage("Help",1," * No inputs"<<std::endl);
+      bbtkBlackBoxMessage("help",1," * No inputs"<<std::endl);
 
-    std::vector<std::string>::iterator i1,i2,i3;
-    for (i1=iname.begin(),i2=ivalue.begin(),i3=iconn.begin();
-	 i1!=iname.end(),i2!=ivalue.end(),i3!=iconn.end();
-	 ++i1,++i2,++i3)
+    std::vector<std::string>::iterator i1,i2,i3,i4;
+    for (i1=iname.begin(),i2=ivalue.begin(),i3=iconn.begin(),i4=istatus.begin();
+	 i1!=iname.end(),i2!=ivalue.end(),i3!=iconn.end(),i4!=istatus.end();
+	 ++i1,++i2,++i3,++i4)
       {
 	std::string name(*i1);
 	name += "'";
@@ -951,21 +1317,23 @@ namespace bbtk
 	value += "'";
 	value.append(1+valuelmax-value.size(),' ');
 	if (i3->size()) 
-	  bbtkMessage("Help",1,"    '"<<name<<" = '"<<value<<" <-- '"<<*i3<<"'"<<std::endl);
+	  bbtkBlackBoxMessage("help",1,"    '"<<name<<" = '"<<value<<" <-- '"
+		      <<*i3<<"'");
 	else 
-	  bbtkMessage("Help",1,"    '"<<name<<" = '"<<value<<std::endl);
+	  bbtkBlackBoxMessage("help",1,"    '"<<name<<" = '"<<value);
+	bbtkBlackBoxMessage("help",1," ["<<*i4<<"]"<<std::endl);
       }
 
     if (oname.size()) 
-      bbtkMessage("Help",1," * Outputs : "<<std::endl);
+      bbtkBlackBoxMessage("help",1," * Outputs : "<<std::endl);
     else 
-      bbtkMessage("Help",1," * No outputs"<<std::endl);
+      bbtkBlackBoxMessage("help",1," * No outputs"<<std::endl);
 
-    std::vector<std::vector<std::string> >::iterator i4;
+    std::vector<std::vector<std::string> >::iterator i5;
 
-    for (i1=oname.begin(),i2=ovalue.begin(),i4=oconn.begin();
-	 i1!=oname.end(),i2!=ovalue.end(),i4!=oconn.end();
-	 ++i1,++i2,++i4)
+    for (i1=oname.begin(),i2=ovalue.begin(),i5=oconn.begin(),i4=ostatus.begin();
+	 i1!=oname.end(),i2!=ovalue.end(),i5!=oconn.end(),i4!=ostatus.end();
+	 ++i1,++i2,++i4,++i5)
       {
 	std::string name(*i1);
 	name += "'";
@@ -973,56 +1341,127 @@ namespace bbtk
 	std::string value(*i2);
 	value += "'";
 	value.append(1+valuelmax-value.size(),' ');
-	if (!(*i4).size())
-	  bbtkMessage("Help",1,"    '"<<name<<" = '"<<value<<std::endl);
+	if (!(*i5).size())
+	  bbtkBlackBoxMessage("help",1,"    '"<<name<<" = '"<<value);
 	else 
 	  {
 	    std::string pref = "    '"+name+" = '"+value;
-	    for (i3=i4->begin();i3!=i4->end();++i3)
+	    for (i3=i5->begin();i3!=i5->end();++i3)
 	      {
-		bbtkMessage("Help",1,pref<<" --> '"<<*i3<<"'"<<std::endl);
+		bbtkBlackBoxMessage("help",1,pref<<" --> '"<<*i3<<"'");
 		pref.replace(0,pref.size(),pref.size(),' ');
 	      }
 	  }
+	bbtkBlackBoxMessage("help",1," ["<<*i4<<"]"<<std::endl);
       }
 
    }
   //=========================================================================
 
 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  static bool bbmgGlobalProcessingExecutionList = false;
+
   //=========================================================================
    void BlackBox::bbGlobalProcessExecutionList()
    {   
-     bbtkDebugMessageInc("Process",1,
-			 "=> BlackBox::bbGlobalProcessExecutionList()"
-			 <<std::endl);     
-     
-     std::set<BlackBox*>::iterator i;
-     for (i=bbmgExecutionList.begin();
-	  i!=bbmgExecutionList.end();
-	  ++i)
+     bbtkDebugMessage("process",3,
+		      "=> BlackBox::bbGlobalProcessExecutionList()"
+		      <<std::endl);    
+     if (bbmgGlobalProcessingExecutionList) 
+       {
+	 bbtkDebugMessage("process",3,"BlackBox::bbGlobalProcessExecutionList() reentered !");
+	 return;
+       }
+     bbmgGlobalProcessingExecutionList = true;
+
+     std::set<BlackBox::WeakPointer>::iterator i; 
+     while (bbmgExecutionList.size()>0)
        {
-	 bbtkDebugMessage("Process",2,
-			  " -> Executing "<<(*i)->bbGetFullName()<<std::endl);
-	 (*i)->bbExecute(true);
+	 i = bbmgExecutionList.begin();
+	 BlackBox::WeakPointer p = *i;
+	 bbmgExecutionList.erase(i);
+	 if (p.lock())
+	   {
+	     bbtkDebugMessage("process",4,
+			      " -> Executing '"<<
+			      p.lock()->bbGetName()<<"'"<<std::endl);
+	     p.lock()->bbExecute(true);
+	   }
+	 else 
+	   {
+	     bbtkGlobalError("Strange error in BlackBox::bbGlobalProcessExecutionList() : Weak bb pointer in bbmgExecutionList is no more valid...");
+	   }
        }
      
      bbmgExecutionList.clear();
-     bbtkDebugMessageDec("Process",1,
+     bbtkDebugMessage("process",3,
 			 "<= BlackBox::bbGlobalProcessExecutionList()"
 			 <<std::endl);     
      
+     bbmgGlobalProcessingExecutionList = false;
      
    }
   //=========================================================================
 
-  //=========================================================================
-  // Static members initialization
-  bool BlackBox::bbmgSomeBoxExecuting = false;
-  bool BlackBox::bbmgFreezeExecution = false;
-  std::set<BlackBox*> BlackBox::bbmgExecutionList;
+    bool BlackBox::bbGlobalGetSomeBoxExecuting()
+	{ 
+		return bbmgSomeBoxExecuting; 
+	}
+
+    void BlackBox::bbGlobalSetSomeBoxExecuting(bool b) 
+	{ 
+		bbmgSomeBoxExecuting = b; 
+	}
+
+    void BlackBox::bbGlobalSetFreezeExecution(bool b) 
+	{ 
+		bbmgFreezeExecution = b;
+	}
+
+    bool BlackBox::bbGlobalGetFreezeExecution() 
+	{ 
+		return bbmgFreezeExecution; 
+	}
+
+  void BlackBox::bbGlobalAddToExecutionList( BlackBox::Pointer b )
+  {  
+    bbtkDebugMessage("process",3,"* bbGlobalAddToExecutionList("<<b->bbGetName()<<")"<<std::endl);
+    if (bbmgGlobalProcessingExecutionList) 
+      {
+	bbtkDebugMessage("process",3,"bbGlobalAddToExecutionList called inside bbGlobalProcessExecutionList !");
+      }
+    bbmgExecutionList.insert(b); 
+  } 
+
+
    //=========================================================================
 
+  //=========================================================================
+  void BlackBox::Check(bool recursive)
+  {
+    bbtkBlackBoxMessage("debug",1,"*** Checking"
+			<<" ... OK"<<std::endl);
+  }
+  //=========================================================================
+
+
+
 
 }  // EO namespace bbtk