ENH: support progress reporting from Python

Code/ApplicationEngine/otbWrapperApplication.cxx

@@ -762,11 +762,25 @@ Application::IsApplicationReady()
 void
 Application::AddProcess(itk::ProcessObject* object, std::string description)
 {
+  m_ProgressSource = object;
+  m_ProgressSourceDescription = description;
+
   AddProcessToWatchEvent event;
   event.SetProcess(object);
   event.SetProcessDescription(description);
   this->InvokeEvent(event);
 }
 
+itk::ProcessObject* Application::GetProgressSource() const
+{
+  return m_ProgressSource;
+}
+
+std::string Application::GetProgressDescription() const
+{
+  return m_ProgressSourceDescription;
+}
+
+
 }
 }

Code/ApplicationEngine/otbWrapperApplication.h

@@ -337,7 +337,10 @@ public:
 
   itk::Logger* GetLogger();
 
-  void AddProcess(itk::ProcessObject* object, std::string description);
+  itk::ProcessObject* GetProgressSource() const;
+
+  std::string GetProgressDescription() const;
+
 
 protected:
   /** Constructor */
@@ -346,6 +349,9 @@ protected:
   /** Destructor */
   virtual ~Application();
 
+  /* Register a ProcessObject as a new progress source */
+  void AddProcess(itk::ProcessObject* object, std::string description);
+
   /** Add a new choice value to an existing choice parameter */
   void AddChoice(std::string paramKey, std::string paramName);
 
@@ -388,6 +394,9 @@ private:
 
   itk::Logger::Pointer              m_Logger;
 
+  itk::ProcessObject::Pointer       m_ProgressSource;
+  std::string                       m_ProgressSourceDescription;
+
 }; //end class
 
 } // end namespace Wrapper

Code/Wrappers/SWIG/itkBase.i

@@ -166,6 +166,7 @@ class itkIndent {
    public:
      //static itkProcessObject_Pointer New();
      virtual itkLightObject_Pointer CreateAnother() const;
+     const float& GetProgress();
    private:
      itkProcessObject(itkProcessObject const & arg0);
      void operator=(itkProcessObject const & arg0);

Code/Wrappers/SWIG/otbApplication.i

@@ -134,6 +134,10 @@ public:
   
   std::string GetParameterAsString(std::string paramKey);
   
+  itkProcessObject* GetProgressSource() const;
+
+  std::string GetProgressDescription() const;
+
 protected:
   Application();
   //virtual ~Application();