ENH : Don't use the WrapperEvent{Listener,Sender}, use qt signals ans slots instead

Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.cxx

@@ -43,7 +43,8 @@ void QtWidgetModel::NotifyUpdate()
   m_Application->UpdateParameters();
 
   // Notify all
-  this->NotifyAll("ParametersUpdated");
+  bool applicationStatus = m_Application->IsApplicationReady();
+  emit SetApplicationReady(applicationStatus);
 }
 
 void QtWidgetModel::ExecuteAndWriteOutput()

Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.h

@@ -42,7 +42,7 @@ class AppliThread : public QThread
   void run()
   {
     m_Application->ExecuteAndWriteOutput();
- }
+  }
 
 private:
   AppliThread(const AppliThread&); //purposely not implemented
@@ -56,7 +56,7 @@ private:
 /** \class
  * \brief
  */
-class QtWidgetModel : public QObject, public EventsSender<std::string>
+class QtWidgetModel : public QObject
 {
   Q_OBJECT
 public:
@@ -72,6 +72,9 @@ public:
   // slot called when execution is requested
   void ExecuteAndWriteOutput();
 
+signals:
+  void SetApplicationReady(bool);
+
 protected slots:
   // slot called everytime one of the widget is updated
   void NotifyUpdate();

Code/Wrappers/QtWidget/otbWrapperQtWidgetView.cxx

@@ -34,7 +34,6 @@ QtWidgetView::QtWidgetView(Application* app)
 
   m_Model = new QtWidgetModel(app);
   m_Application = app;
-  m_Model->RegisterListener( this );
 }
 
 QtWidgetView::~QtWidgetView()
@@ -128,6 +127,7 @@ QWidget* QtWidgetView::CreateFooter()
   m_ExecButton->setEnabled(false);
   m_ExecButton->setText(QObject::tr("Execute"));
   connect( m_ExecButton, SIGNAL(clicked()), this, SLOT(ExecuteAndWriteOutputSlot() ) );
+  connect( m_Model, SIGNAL(SetApplicationReady(bool)), m_ExecButton, SLOT(setEnabled(bool)) );
 
   m_QuitButton = new QPushButton(footerGroup);
   m_QuitButton->setText(QObject::tr("Quit"));
@@ -253,21 +253,6 @@ void QtWidgetView::CloseSlot()
 {
   this->close();
 }
-void QtWidgetView::Notify(const std::string& event)
-{
-  if(event == "ParametersUpdated")
-    {
-    // "Execute" button activation depends on the application status
-    if(m_Model->GetApplication()->IsApplicationReady())
-      {
-      m_ExecButton->setEnabled(true);
-      }
-    else
-      {
-      m_ExecButton->setEnabled(false);
-      }
-    }
-}
 
 }
 }

Code/Wrappers/QtWidget/otbWrapperQtWidgetView.h

@@ -32,7 +32,7 @@ namespace Wrapper
 /** \class
  * \brief
  */
-  class QtWidgetView : public QWidget , public EventsListener<std::string>
+class QtWidgetView : public QWidget
 {
   Q_OBJECT
 public:
@@ -48,9 +48,6 @@ public:
   }
   */
 
-  // Get the notifications
-  void Notify(const std::string& event);
-
 public slots:
   void ExecuteAndWriteOutputSlot();
   void CloseSlot();