From 7c5051a356ebf0cafc1703146236dfb6991c0ffb Mon Sep 17 00:00:00 2001
From: Otmane Lahlou <otmane.lahlou@c-s.fr>
Date: Mon, 5 Sep 2011 16:41:09 +0200
Subject: [PATCH] ENH : add notifications handling to update the view

---
 .../QtWidget/otbWrapperQtWidgetModel.cxx        |  6 ++++--
 .../Wrappers/QtWidget/otbWrapperQtWidgetModel.h |  7 +++----
 .../QtWidget/otbWrapperQtWidgetView.cxx         | 17 +++++++++++++++++
 Code/Wrappers/QtWidget/otbWrapperQtWidgetView.h |  7 +++++--
 4 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.cxx b/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.cxx
index 48cadf1078..39263dfca9 100644
--- a/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.cxx
+++ b/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.cxx
@@ -29,10 +29,8 @@ namespace Wrapper
 QtWidgetModel::QtWidgetModel(Application* app)
  : m_Application(app)
 {
-
   m_Application->Init();
   m_ProgressWindow = new QWidget();
-  //m_Application->RegisterListener( this );
 }
 
 QtWidgetModel::~QtWidgetModel()
@@ -41,7 +39,11 @@ QtWidgetModel::~QtWidgetModel()
 
 void QtWidgetModel::NotifyUpdate()
 {
+  // Update the parameters
   m_Application->UpdateParameters();
+
+  // Notify all
+  this->NotifyAll("ParametersUpdated");
 }
 
 void QtWidgetModel::ExecuteAndWriteOutput()
diff --git a/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.h b/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.h
index 78ea474536..b74003d22b 100644
--- a/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.h
+++ b/Code/Wrappers/QtWidget/otbWrapperQtWidgetModel.h
@@ -21,7 +21,8 @@
 #include <QtGui>
 #include "otbWrapperApplication.h"
 #include "otbWrapperChoiceParameter.h"
-//#include "otbWrapperEventsListener.h"
+#include "otbWrapperEventsSender.h"
+#include "otbWrapperEvent.h"
 
 namespace otb
 {
@@ -55,7 +56,7 @@ private:
 /** \class
  * \brief
  */
-  class QtWidgetModel : public QObject /*, public EventsListener<std::string>*/
+class QtWidgetModel : public QObject, public EventsSender<std::string>
 {
   Q_OBJECT
 public:
@@ -75,8 +76,6 @@ protected slots:
   // slot called everytime one of the widget is updated
   void NotifyUpdate();
 
-  //void Notify();
-
 private:
   QtWidgetModel(const QtWidgetModel&); //purposely not implemented
   void operator=(const QtWidgetModel&); //purposely not implemented
diff --git a/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.cxx b/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.cxx
index d4765c2c44..69331f7cdd 100644
--- a/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.cxx
+++ b/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.cxx
@@ -34,6 +34,7 @@ QtWidgetView::QtWidgetView(Application* app)
 
   m_Model = new QtWidgetModel(app);
   m_Application = app;
+  m_Model->RegisterListener( this );
 }
 
 QtWidgetView::~QtWidgetView()
@@ -124,6 +125,7 @@ QWidget* QtWidgetView::CreateFooter()
 
   m_ExecButton = new QPushButton(footerGroup);
   m_ExecButton->setDefault(true);
+  m_ExecButton->setEnabled(false);
   m_ExecButton->setText(QObject::tr("Execute"));
   connect( m_ExecButton, SIGNAL(clicked()), this, SLOT(ExecuteAndWriteOutputSlot() ) );
 
@@ -251,6 +253,21 @@ 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);
+      }
+    }
+}
 
 }
 }
diff --git a/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.h b/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.h
index 26b4c367de..95cecc4180 100644
--- a/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.h
+++ b/Code/Wrappers/QtWidget/otbWrapperQtWidgetView.h
@@ -21,7 +21,7 @@
 #include <QtGui>
 #include "otbWrapperApplication.h"
 #include "otbWrapperQtWidgetModel.h"
-//#include "otbWrapperEventsListener.h"
+#include "otbWrapperEventsListener.h"
 
 
 namespace otb
@@ -32,7 +32,7 @@ namespace Wrapper
 /** \class
  * \brief
  */
-  class QtWidgetView : public QWidget /*, public EventsListener<std::string>*/
+  class QtWidgetView : public QWidget , public EventsListener<std::string>
 {
   Q_OBJECT
 public:
@@ -48,6 +48,9 @@ public:
   }
   */
 
+  // Get the notifications
+  void Notify(const std::string& event);
+
 public slots:
   void ExecuteAndWriteOutputSlot();
   void CloseSlot();
-- 
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