ENH: add ArrowKeyMoveActionHandler

Code/Visualization/otbArrowKeyMoveActionHandler.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 __otbArrowKeyMoveActionHandler_h
+#define __otbArrowKeyMoveActionHandler_h
+
+#include "otbImageWidgetActionHandler.h"
+
+namespace otb
+{
+/** \class ArrowKeyMoveActionHandler
+   *   \brief Handle moving in the image with the arrow key.
+   *
+   *   \sa ImageWidgetController
+   *   \sa ImageWidgetActionHandler
+ */
+
+template <class TModel, class TView>
+    class ArrowKeyMoveActionHandler
+: public ImageWidgetActionHandler
+{
+  public:
+    /** Standard class typedefs */
+    typedef ArrowKeyMoveActionHandler       Self;
+    typedef ImageWidgetActionHandler          Superclass;
+    typedef itk::SmartPointer<Self>           Pointer;
+    typedef itk::SmartPointer<const Self>     ConstPointer;
+
+    /** Method for creation through the object factory */
+    itkNewMacro(Self);
+
+    /** Runtime information */
+    itkTypeMacro(ArrowKeyMoveActionHandler,ImageWidgetActionHandler);
+
+    /** Model typedefs */
+    typedef TModel                         ModelType;
+    typedef typename ModelType::Pointer    ModelPointerType;
+    typedef typename ModelType::IndexType  IndexType;
+
+    /** View typedef */
+    typedef TView                                     ViewType;
+    typedef typename ViewType::Pointer                ViewPointerType;
+    typedef typename ViewType::ImageWidgetPointerType WidgetPointerType;
+
+    /** Handle widget event
+      */
+    virtual bool HandleWidgetEvent(std::string widgetId, int event)
+    {
+      if(m_Model.IsNotNull() &&  m_View.IsNotNull())
+      {
+        // Find the source widget
+        WidgetPointerType sourceWidget;
+        bool handle = false;
+        if(widgetId == m_View->GetScrollWidget()->GetIdentifier() )
+        {
+          sourceWidget = m_View->GetScrollWidget();
+          handle = true;
+        }
+        else if(widgetId == m_View->GetFullWidget()->GetIdentifier() )
+        {
+          sourceWidget = m_View->GetFullWidget();
+          handle = true;
+        }
+        else if(widgetId == m_View->GetZoomWidget()->GetIdentifier() )
+        {
+          sourceWidget = m_View->GetZoomWidget();
+          handle = true;
+        }
+        if ((handle)
+             && ((event == FL_KEYBOARD) || (event == FL_SHORTCUT)))
+        {
+          switch(Fl::event_key())
+          {
+            case FL_Up:
+            {
+              typename ViewType::SizeType size;
+              size = m_View->GetFullWidget()->GetExtent().GetSize();
+
+              // Get the current position
+              typename ViewType::ImageWidgetType::PointType screenPoint, imagePoint;
+              screenPoint[0] = size[0]/2;
+              screenPoint[1] = size[1]/2;
+
+              // Transform to image point
+              imagePoint = m_View->GetFullWidget()->GetScreenToImageTransform()->TransformPoint(screenPoint);
+
+              // Transform to index
+              typename ViewType::IndexType index;
+              index[0]=static_cast<int>(imagePoint[0]);
+              index[1]=static_cast<int>(imagePoint[1]);
+
+              // Move
+              index[1] -= size[1];
+
+              // Change scaled extract region center
+              m_Model->SetExtractRegionCenter(index);
+              // Update model
+              m_Model->Update();
+              return true;
+              break;
+            }
+            case FL_Down:
+            {
+              typename ViewType::SizeType size;
+              size = m_View->GetFullWidget()->GetExtent().GetSize();
+
+              // Get the current position
+              typename ViewType::ImageWidgetType::PointType screenPoint, imagePoint;
+              screenPoint[0] = size[0]/2;
+              screenPoint[1] = size[1]/2;
+
+              // Transform to image point
+              imagePoint = m_View->GetFullWidget()->GetScreenToImageTransform()->TransformPoint(screenPoint);
+
+              // Transform to index
+              typename ViewType::IndexType index;
+              index[0]=static_cast<int>(imagePoint[0]);
+              index[1]=static_cast<int>(imagePoint[1]);
+
+              // Move
+              index[1] += size[1];
+
+              // Change scaled extract region center
+              m_Model->SetExtractRegionCenter(index);
+              // Update model
+              m_Model->Update();
+              return true;
+              break;
+            }
+            case FL_Left:
+            {
+              typename ViewType::SizeType size;
+              size = m_View->GetFullWidget()->GetExtent().GetSize();
+
+              // Get the current position
+              typename ViewType::ImageWidgetType::PointType screenPoint, imagePoint;
+              screenPoint[0] = size[0]/2;
+              screenPoint[1] = size[1]/2;
+
+              // Transform to image point
+              imagePoint = m_View->GetFullWidget()->GetScreenToImageTransform()->TransformPoint(screenPoint);
+
+              // Transform to index
+              typename ViewType::IndexType index;
+              index[0]=static_cast<int>(imagePoint[0]);
+              index[1]=static_cast<int>(imagePoint[1]);
+
+              // Move
+              index[0] -= size[0];
+
+              // Change scaled extract region center
+              m_Model->SetExtractRegionCenter(index);
+              // Update model
+              m_Model->Update();
+              return true;
+              break;
+            }
+            case FL_Right:
+            {
+              typename ViewType::SizeType size;
+              size = m_View->GetFullWidget()->GetExtent().GetSize();
+
+              // Get the current position
+              typename ViewType::ImageWidgetType::PointType screenPoint, imagePoint;
+              screenPoint[0] = size[0]/2;
+              screenPoint[1] = size[1]/2;
+
+              // Transform to image point
+              imagePoint = m_View->GetFullWidget()->GetScreenToImageTransform()->TransformPoint(screenPoint);
+
+              // Transform to index
+              typename ViewType::IndexType index;
+              index[0]=static_cast<int>(imagePoint[0]);
+              index[1]=static_cast<int>(imagePoint[1]);
+
+              // Move
+              index[0] += size[0];
+
+              // Change scaled extract region center
+              m_Model->SetExtractRegionCenter(index);
+              // Update model
+              m_Model->Update();
+              return true;
+              break;
+            }
+            default:
+            {
+              return false;
+              break;
+            }
+          }
+        }
+      }
+      return false;
+    }
+
+    /** Set/Get the pointer to the model */
+    itkSetObjectMacro(Model,ModelType);
+    itkGetObjectMacro(Model,ModelType);
+
+    /** Set/Get the pointer to the view */
+    itkSetObjectMacro(View,ViewType);
+    itkGetObjectMacro(View,ViewType);
+
+  protected:
+    /** Constructor */
+    ArrowKeyMoveActionHandler() : m_View(), m_Model()
+    {}
+
+    /** Destructor */
+    virtual ~ArrowKeyMoveActionHandler(){}
+    /** Printself method */
+    void PrintSelf(std::ostream& os, itk::Indent indent) const
+    {
+      Superclass::PrintSelf(os,indent);
+    }
+
+  private:
+    ArrowKeyMoveActionHandler(const Self&);    // purposely not implemented
+    void operator=(const Self&); // purposely not implemented
+
+    // Pointer to the view
+    ViewPointerType m_View;
+
+    // Pointer to the model
+    ModelPointerType m_Model;
+
+}; // end class
+} // end namespace otb
+#endif
+
+

Code/Visualization/otbImageWidget.h

@@ -61,11 +61,11 @@ public:
   /** Region size & index typedef */
   typedef typename RegionType::SizeType       SizeType;
   typedef typename RegionType::IndexType      IndexType;
-  
+
   /** GlComponent typedef */
   typedef GlComponent                                   GlComponentType;
   typedef typename GlComponentType::Pointer             GlComponentPointerType;
-  typedef typename GlComponentType::ColorType           ColorType;     
+  typedef typename GlComponentType::ColorType           ColorType;
   typedef typename GlComponentType::AffineTransformType AffineTransformType;
   typedef typename AffineTransformType::Pointer         AffineTransformPointerType;
   typedef typename GlComponentType::VectorType          VectorType;
@@ -99,6 +99,8 @@ public:
   itkGetObjectMacro(ImageToScreenTransform,AffineTransformType);
   itkGetObjectMacro(ScreenToImageTransform,AffineTransformType);
 
+  /** Get the Extent region */
+  itkGetMacro(Extent, RegionType);
 
   /** Add a GlComponent */
   unsigned int AddGlComponent(GlComponent * glComponent)
@@ -175,7 +177,7 @@ private:
 
   /** OpenGl buffered region */
   RegionType m_OpenGlBufferedRegion;
-  
+
   /** The display extent */
   RegionType m_Extent;