- Corrected get_front() issues.

- Widget tests are now working properly.



git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@990 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/concrete_history.cc

@@ -122,7 +122,7 @@ ConcreteHistory::get_last_environment() const
 {
   // Should always be true:
   assert(_snapshots.size() > 0);
-  return *_snapshots.back();
+  return get_environment_at(get_front());
 }
 
 
@@ -487,6 +487,16 @@ ConcreteHistory::edit_subrequest(SubRequest& subrequest,
   reset(true);
 }
 
+
+void
+ConcreteHistory::step_front(position p)
+{
+  _front = p;
+  if (p > _snapshots.size())
+    _front = _snapshots.size();
+  notify_change();
+}
+
 void
 ConcreteHistory::reset(bool notify)
 {
@@ -496,6 +506,7 @@ ConcreteHistory::reset(bool notify)
 
   for_each(it, _snapshots.end(), deletor<ConcreteEnvironment>());
   _snapshots.resize(1); // Truncate to keep only our "model"
+  _front = 0;
 
   if (notify)
     notify_change();

src/backend/concrete_history.hh

@@ -110,6 +110,7 @@ namespace sgpem
                                                time_t  duration);
 
 
+    virtual void step_front(position p);
 
     virtual void reset(bool notify = true);
 

src/backend/concrete_simulation.cc

@@ -65,7 +65,6 @@ ConcreteSimulation::jump_to(History::position p) throw(UserInterruptException, N
  		break;
   case state_stopped:
     _history.reset(true);
-		_front = 0;
     break;
   default:
     break;
@@ -81,12 +80,15 @@ ConcreteSimulation::jump_to(History::position p) throw(UserInterruptException, N
   _history.set_notify_enabled(false);
 
 	bool yet_to_finish = true;
-	while (yet_to_finish && p > _front)
+  History::position increment = 0;
+	while (yet_to_finish && p > _history.get_front() + increment)
+  {
 		yet_to_finish = step();
-
+    increment++;
+  }
+  get_history().step_front(p);
 	if (!yet_to_finish)
 		stop();
-	_front = std::min(p, _front);
 
   // Reenables updates to registered observers. 
   // Calls _history.notify_change() on reactivation.
@@ -125,7 +127,6 @@ ConcreteSimulation::run() throw(UserInterruptException, NullPolicyException, Mal
   {
   case state_stopped:
     _history.reset(true);
-		_front = 0;
     break;
   default:
     break;
@@ -135,6 +136,7 @@ ConcreteSimulation::run() throw(UserInterruptException, NullPolicyException, Mal
 
   //step forward
   bool yet_to_finish = step();
+  get_history().step_front(get_history().get_front() + 1);
   if (yet_to_finish)
     {
       if(_mode == mode_step_by_step) 
@@ -173,9 +175,8 @@ ConcreteSimulation::step()
     {
       //step forward
       bool yet_to_finish = true;
-			if (_front == get_history().get_size() - 1)
+			if (get_history().get_front() == get_history().get_size() - 1)
 				yet_to_finish = Scheduler::get_instance().step_forward(_history, *get_policy(), *get_resource_policy());
-			_front++;
 			return yet_to_finish;
     }
   catch (const CPUPolicyException& e)

src/backend/history.cc

@@ -30,7 +30,7 @@ using namespace std;
 
 
 History::History()
-    : _notify(true)
+    : _front(0), _notify(true)
 {}
 
 
@@ -65,6 +65,11 @@ History::notify_change()
 }
 
 
+unsigned int History::get_front() const
+{
+	return _front;
+}
+
 bool
 History::set_notify_enabled(bool enabled)
 {

src/backend/history.hh

@@ -128,6 +128,7 @@ namespace sgpem
                                         resource_key_t resource_key,
                                         time_t  duration) = 0;
 
+		virtual position get_front() const;
 
     virtual void  attach(HistoryObserver& observer);
     virtual void  detach(const HistoryObserver& observer);
@@ -148,7 +149,11 @@ namespace sgpem
 
     virtual void notify_change();
 
+		position _front;
+
   private:
+
+
     bool _notify;
 
   }

src/backend/simulation.cc

@@ -36,7 +36,7 @@ using namespace sgpem;
 template class SG_DLLEXPORT Singleton<ConcreteSimulation>;
 
 Simulation::Simulation()
-  : _notify(true), _front(0)
+  : _notify(true)
 {
 }
 
@@ -65,11 +65,6 @@ Simulation::detach(const SimulationObserver& observer)
                              &observer));
 }
 
-unsigned int Simulation::get_front() const
-{
-	return _front;
-}
-
 void
 Simulation::notify_change()
 {

src/backend/simulation.hh

@@ -159,8 +159,6 @@ namespace sgpem
 
     virtual const History& get_history() const = 0;
 
-		virtual unsigned int get_front() const;
-
     /**
      * Small kludge to avoid the need for declaration of ConcreteSimulation
      * by the calling code of Simulation::get_instance()
@@ -186,9 +184,6 @@ namespace sgpem
     typedef std::vector<SimulationObserver*> RegisteredObservers;
     RegisteredObservers _observers;
 
-		// since no constructor is available, these fields must be defined in concrete subclasses.
-		History::position _front;
-
     Simulation(); // Constructor
 
     virtual void notify_change();