ENH: (Visu Refactoring) Adding a widget controller

Code/VisuRefac/otbImageWidgetController.cxx

+/*=========================================================================
+
+  Program:   ORFEO Toolbox
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
+  See OTBCopyright.txt 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.
+
+=========================================================================*/
+#ifndef __otbImageWidgetController_cxx
+#define __otbImageWidgetController_cxx
+
+#include "otbImageWidgetController.h"
+
+namespace otb
+{
+ImageWidgetController::ImageWidgetController()
+{
+  // Instantiate action handlers list
+  m_ActionHandlersList = ActionHandlerListType::New();
+}
+
+ImageWidgetController::~ImageWidgetController()
+{}
+
+void ImageWidgetController::AddActionHandler(ActionHandlerType * handler)
+{
+  // Add the handler to the list
+  m_ActionHandlersList->PushBack(handler);
+}
+
+void ImageWidgetController::RemoveActionHandler(unsigned int index)
+{
+  // Remove the given handler
+  m_ActionHandlersList->Erase(index);
+}
+
+void ImageWidgetController::ClearAllActionHandlers()
+{
+  // Clear the handlers list
+  m_ActionHandlersList->Clear();
+}
+
+int ImageWidgetController::HandleWidgetEvent(std::string widgetId, int event)
+{
+  // Define an iterator on the action handlers list
+  ActionHandlerListType::Iterator it = m_ActionHandlersList->Begin();
+
+  // Found indicates if a handler was found to respond to this event
+  bool found = false;
+
+  // The action handler found
+  ActionHandlerType * handler;
+
+  while(!found && it!=m_ActionHandlersList->End())
+    {
+    // Get the current handler
+    handler = it.Get();
+    // Check if it listens to (widget,event)
+    found   = handler->ListenToEvent(widgetId,event);
+    ++it;
+    }
+  // If an handler was found, use it
+  if(found)
+    {
+    return handler->HandleWidgetEvent(widgetId,event);
+    }
+  else
+    {
+    return 0;
+    }
+}
+
+void ImageWidgetController::HandleWidgetResize(std::string widgetId, int x, int y, int w, int h)
+{
+  // Define an iterator on the action handlers list
+  ActionHandlerListType::Iterator it = m_ActionHandlersList->Begin();
+  
+  // Found indicates if a handler was found to respond to this event
+  bool found = false;
+
+  // The action handler found
+  ActionHandlerType * handler;
+
+  while(!found && it!=m_ActionHandlersList->End())
+    {
+    // Get the current handler
+    handler = it.Get();
+    // Check if it listens to (widget,event)
+    found   = handler->ListenToResize(widgetId);
+    ++it;
+    }
+  // If an handler was found, use it
+  if(found)
+    {
+    handler->HandleWidgetResize(widgetId,x,y,w,h);
+    }
+}
+
+void ImageWidgetController::PrintSelf(std::ostream& os, itk::Indent indent) const
+{
+  Superclass::PrintSelf(os,indent);
+  os<<indent<<"Number of action handlers: "<<m_ActionHandlersList->Size()<<std::endl;
+}
+
+
+} // end namespace otb
+ 
+#endif

Code/VisuRefac/otbImageWidgetController.h

+/*=========================================================================
+
+  Program:   ORFEO Toolbox
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+
+  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
+  See OTBCopyright.txt 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.
+
+=========================================================================*/
+#ifndef __otbImageWidgetController_h
+#define __otbImageWidgetController_h
+
+#include "otbImageWidgetActionHandler.h"
+#include "otbObjectList.h"
+
+namespace otb
+{
+/** \class ImageWidgetController
+*   \brief This controller processes the events from a set of image
+*   widget.
+*   Events are procesed by instances of the ImageWidgetActionHandler
+*   class which are registered dynamically via the AddActionHandler
+*   method.
+*  \sa ImageWidget
+*  \sa ImageWidgetActionHandler
+*/
+
+class ImageWidgetController
+  : public itk::Object
+{
+public:
+  /** Standard class typedefs */
+  typedef ImageWidgetController             Self;
+  typedef itk::Object                       Superclass;
+  typedef itk::SmartPointer<Self>           Pointer;
+  typedef itk::SmartPointer<const Self>     ConstPointer;
+  
+  /** Method for creation through the object factory */
+  itkNewMacro(Self);
+  
+  /** Runtime information */
+  itkTypeMacro(ImageWidgetController,Object);
+
+  /** Handler typedef */
+  typedef otb::ImageWidgetActionHandler      ActionHandlerType;
+  typedef otb::ObjectList<ActionHandlerType> ActionHandlerListType;
+  typedef ActionHandlerListType::Pointer     ActionHandlerListPointerType;
+
+  /** Add an action handler
+   *  \param handler The action handler.
+   **/
+  virtual void AddActionHandler(ActionHandlerType * handler);
+
+  /** Remove an action handler if it exists
+   *  \param index The index of the action handler.
+   **/
+  virtual void RemoveActionHandler(unsigned int index);
+
+  /** Remove all actions handler
+   */
+  virtual void ClearAllActionHandlers();
+
+  /** Handle an event from a widget 
+   * \param widgetId The id of the widget the event comes from
+   * \param event The event code
+   */
+  int HandleWidgetEvent(std::string widgetId, int event);
+
+  /** Handle widget resizing
+   * \param widgetId The id of the resized widget
+   * \param x new x location
+   * \param y new y location
+   * \param w new width
+   * \param h new height
+   */
+  void HandleWidgetResize(std::string widgetId,int x,int y, int w, int h);
+
+protected:
+  /** Constructor */
+  ImageWidgetController();
+  /** Destructor */
+  ~ImageWidgetController();
+  /** Printself method */
+  void PrintSelf(std::ostream& os, itk::Indent indent) const;
+ 
+private:
+  ImageWidgetController(const Self&);    // purposely not implemented
+  void operator=(const Self&); // purposely not implemented
+
+  /** Action handlers list */
+  ActionHandlerListPointerType m_ActionHandlersList;
+
+}; // end class 
+} // end namespace otb
+#endif
+
+