diff --git a/DestinationGLCanvas.cpp b/DestinationGLCanvas.cpp
deleted file mode 100644
index a4defce..0000000
--- a/DestinationGLCanvas.cpp
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * DestinationGLCanvas.cpp
- *
- * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
- * (c) 2013 Alexandre Quessy -- alexandre(@)quessy(.)net
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "DestinationGLCanvas.h"
-#include "MainWindow.h"
-
-DestinationGLCanvas::DestinationGLCanvas(MainWindow* mainWindow, QWidget* parent, const QGLWidget* shareWidget, QGraphicsScene* scene)
-: MapperGLCanvas(mainWindow, parent, shareWidget, scene)
-{
-}
-
-MShape::ptr DestinationGLCanvas::getShapeFromMapping(const Mapping::ptr& mapping) const
-{
-  return (mapping.isNull() ? MShape::ptr() : mapping->getShape());
-}
-
-QSharedPointer<ShapeGraphicsItem> DestinationGLCanvas::getShapeGraphicsItemFromMapping(const Mapping::ptr& mapping) const
-{
-  return (mapping.isNull() ? QSharedPointer<ShapeGraphicsItem>() : MainWindow::instance()->getMappingGuiByMappingId(mapping->getId())->getGraphicsItem());
-}
diff --git a/DestinationGLCanvas.h b/DestinationGLCanvas.h
deleted file mode 100644
index 38f70af..0000000
--- a/DestinationGLCanvas.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * DestinationGLCanvas.h
- *
- * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
- * (c) 2013 Alexandre Quessy -- alexandre(@)quessy(.)net
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef DESTINATIONGLCANVAS_H_
-#define DESTINATIONGLCANVAS_H_
-
-#include "MapperGLCanvas.h"
-#include "MappingManager.h"
-
-#include "MappingGui.h"
-
-class DestinationGLCanvas: public MapperGLCanvas
-{
-  Q_OBJECT
-
-public:
-  DestinationGLCanvas(MainWindow* mainWindow, QWidget* parent = 0, const QGLWidget* shareWidget = 0, QGraphicsScene* scene = 0);
-  virtual ~DestinationGLCanvas() {}
-
-  virtual bool isOutput() const { return true; }
-  virtual MShape::ptr getShapeFromMapping(const Mapping::ptr& mapping) const;
-  virtual QSharedPointer<ShapeGraphicsItem> getShapeGraphicsItemFromMapping(const Mapping::ptr& mapping) const;
-};
-
-#endif /* DESTINATIONGLCANVAS_H_ */
diff --git a/MainWindow.cpp b/MainWindow.cpp
index 835d163..887c918 100644
--- a/MainWindow.cpp
+++ b/MainWindow.cpp
@@ -1389,12 +1389,12 @@ void MainWindow::createLayout()
   mappingPropertyPanel->setMinimumHeight(MAPPING_PROPERTY_PANEL_MINIMUM_HEIGHT);
 
   // Create canvases.
-  sourceCanvas = new SourceGLCanvas(this);
+  sourceCanvas = new MapperGLCanvas(this, false);
   sourceCanvas->setFocusPolicy(Qt::ClickFocus);
   sourceCanvas->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
   sourceCanvas->setMinimumSize(CANVAS_MINIMUM_WIDTH, CANVAS_MINIMUM_HEIGHT);
 
-  destinationCanvas = new DestinationGLCanvas(this, 0, (QGLWidget*)sourceCanvas->viewport());
+  destinationCanvas = new MapperGLCanvas(this, true, 0, (QGLWidget*)sourceCanvas->viewport());
   destinationCanvas->setFocusPolicy(Qt::ClickFocus);
   destinationCanvas->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
   destinationCanvas->setMinimumSize(CANVAS_MINIMUM_WIDTH, CANVAS_MINIMUM_HEIGHT);
diff --git a/MainWindow.h b/MainWindow.h
index 9c03d73..fe31217 100644
--- a/MainWindow.h
+++ b/MainWindow.h
@@ -32,11 +32,10 @@
 
 #include "MM.h"
 
-#include "SourceGLCanvas.h"
+#include "MapperGLCanvas.h"
 #ifdef HAVE_OSC
 #include "OscInterface.h"
 #endif
-#include "DestinationGLCanvas.h"
 
 #include "OutputGLWindow.h"
 #include "PreferencesDialog.h"
@@ -368,8 +367,8 @@ private:
 
   QUndoView* undoView;
 
-  SourceGLCanvas* sourceCanvas;
-  DestinationGLCanvas* destinationCanvas;
+  MapperGLCanvas* sourceCanvas;
+  MapperGLCanvas* destinationCanvas;
   OutputGLWindow* outputWindow;
   ConsoleWindow* consoleWindow;
 
diff --git a/MapperGLCanvas.cpp b/MapperGLCanvas.cpp
index aa427f5..34d39c3 100644
--- a/MapperGLCanvas.cpp
+++ b/MapperGLCanvas.cpp
@@ -23,9 +23,10 @@
 #include "MainWindow.h"
 #include "Commands.h"
 
-MapperGLCanvas::MapperGLCanvas(MainWindow* mainWindow, QWidget* parent, const QGLWidget * shareWidget, QGraphicsScene* scene)
+MapperGLCanvas::MapperGLCanvas(MainWindow* mainWindow, bool isOutput, QWidget* parent, const QGLWidget * shareWidget, QGraphicsScene* scene)
   : QGraphicsView(parent),
     _mainWindow(mainWindow),
+    _isOutput(isOutput),
     _vertexGrabbed(false),
     _activeVertex(NO_VERTEX),
     _shapeGrabbed(false), // comment out?
@@ -67,6 +68,16 @@ MapperGLCanvas::MapperGLCanvas(MainWindow* mainWindow, QWidget* parent, const QG
   this->scene()->setBackgroundBrush(Qt::black);
 }
 
+MShape::ptr MapperGLCanvas::getShapeFromMapping(Mapping::ptr mapping)
+{
+  if (mapping.isNull())
+    return MShape::ptr();
+  else
+  {
+    return (isOutput() ? mapping->getShape() : mapping->getInputShape());
+  }
+}
+
 MShape::ptr MapperGLCanvas::getCurrentShape()
 {
   return getShapeFromMapping(MainWindow::instance()->getCurrentMapping());
@@ -74,7 +85,14 @@ MShape::ptr MapperGLCanvas::getCurrentShape()
 
 QSharedPointer<ShapeGraphicsItem> MapperGLCanvas::getCurrentShapeGraphicsItem()
 {
-  return getShapeGraphicsItemFromMapping(MainWindow::instance()->getCurrentMapping());
+  Mapping::ptr mapping = MainWindow::instance()->getCurrentMapping();
+  if (mapping.isNull())
+    return QSharedPointer<ShapeGraphicsItem>();
+  else
+  {
+    MappingGui::ptr mappingGui = MainWindow::instance()->getMappingGuiByMappingId(mapping->getId());
+    return (isOutput() ? mappingGui->getGraphicsItem() : mappingGui->getInputGraphicsItem());
+  }
 }
 
 // Draws foreground (displays crosshair if needed).
diff --git a/MapperGLCanvas.h b/MapperGLCanvas.h
index 2738e21..168c137 100644
--- a/MapperGLCanvas.h
+++ b/MapperGLCanvas.h
@@ -49,14 +49,13 @@ class MapperGLCanvas: public QGraphicsView
   Q_OBJECT
 public:
   /// Constructor.
-  MapperGLCanvas(MainWindow* mainWindow, QWidget* parent = 0, const QGLWidget* shareWidget = 0, QGraphicsScene* scene = 0);
+  MapperGLCanvas(MainWindow* mainWindow, bool isOutput, QWidget* parent = 0, const QGLWidget* shareWidget = 0, QGraphicsScene* scene = 0);
   virtual ~MapperGLCanvas() {}
 
   /// Returns shape associated with mapping id.
-  virtual bool isOutput() const = 0;
-  virtual MShape::ptr getShapeFromMapping(const Mapping::ptr& mapping) const = 0;
-  virtual QSharedPointer<ShapeGraphicsItem> getShapeGraphicsItemFromMapping(const Mapping::ptr& mapping) const = 0;
+  virtual bool isOutput() const { return _isOutput; }
 
+  MShape::ptr getShapeFromMapping(Mapping::ptr mapping);
   MShape::ptr getCurrentShape();
   QSharedPointer<ShapeGraphicsItem> getCurrentShapeGraphicsItem();
 
@@ -134,6 +133,9 @@ private:
   // Pointer to main window.
   MainWindow* _mainWindow;
 
+  // Is this a destination (output) or source (input) canvas.
+  bool _isOutput;
+
   // Last point pressed (in mouse/window coordinates).
   QPoint _mousePressedPosition;
 
diff --git a/OutputGLCanvas.cpp b/OutputGLCanvas.cpp
index 8bd8236..ee9fd91 100644
--- a/OutputGLCanvas.cpp
+++ b/OutputGLCanvas.cpp
@@ -22,7 +22,7 @@
 #include "MainWindow.h"
 
 OutputGLCanvas::OutputGLCanvas(MainWindow* mainWindow, QWidget* parent, const QGLWidget* shareWidget, QGraphicsScene* scene)
-: DestinationGLCanvas(mainWindow, parent, shareWidget, scene),
+: MapperGLCanvas(mainWindow, true, parent, shareWidget, scene),
   _displayCrosshair(false),
   _svg_test_signal(":/test-signal"),
   _brush_test_signal(_svg_test_signal)
@@ -128,6 +128,6 @@ void OutputGLCanvas::mouseMoveEvent(QMouseEvent *event)
   }
   else
   {
-    DestinationGLCanvas::mouseMoveEvent(event);
+    MapperGLCanvas::mouseMoveEvent(event);
   }
 }
diff --git a/OutputGLCanvas.h b/OutputGLCanvas.h
index 85d5e6e..e121c55 100644
--- a/OutputGLCanvas.h
+++ b/OutputGLCanvas.h
@@ -21,9 +21,9 @@
 #ifndef OUTPUTGLCANVAS_H_
 #define OUTPUTGLCANVAS_H_
 
-#include "DestinationGLCanvas.h"
+#include "MapperGLCanvas.h"
 
-class OutputGLCanvas: public DestinationGLCanvas
+class OutputGLCanvas: public MapperGLCanvas
 {
   Q_OBJECT
 
diff --git a/OutputGLWindow.cpp b/OutputGLWindow.cpp
index 7681983..3bd6cb0 100644
--- a/OutputGLWindow.cpp
+++ b/OutputGLWindow.cpp
@@ -23,7 +23,7 @@
 
 #include "MainWindow.h"
 
-OutputGLWindow:: OutputGLWindow(QWidget* parent, const DestinationGLCanvas* canvas_) : QDialog(parent)
+OutputGLWindow:: OutputGLWindow(QWidget* parent, const MapperGLCanvas* canvas_) : QDialog(parent)
 {
   resize(MainWindow::OUTPUT_WINDOW_MINIMUM_WIDTH, MainWindow::OUTPUT_WINDOW_MINIMUM_HEIGHT);
 
diff --git a/OutputGLWindow.h b/OutputGLWindow.h
index 50dd624..4290c96 100644
--- a/OutputGLWindow.h
+++ b/OutputGLWindow.h
@@ -39,7 +39,7 @@ class OutputGLWindow : public QDialog
   Q_OBJECT
 
 public:
-  OutputGLWindow(QWidget* parent, const DestinationGLCanvas* canvas_);
+  OutputGLWindow(QWidget* parent, const MapperGLCanvas* canvas_);
   //OutputGLWindow(MainWindow* mainWindow, QWidget* parent = 0, const QGLWidget * shareWidget = 0);
 
 public slots:
@@ -52,7 +52,7 @@ signals:
   void closed();
 
 public:
-  DestinationGLCanvas* getCanvas() const { return canvas; }
+  MapperGLCanvas* getCanvas() const { return canvas; }
   void setPointerHasMoved();
   void setCursorVisible(bool visible);
 
diff --git a/SourceGLCanvas.cpp b/SourceGLCanvas.cpp
deleted file mode 100644
index 3f244a6..0000000
--- a/SourceGLCanvas.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * SourceGLCanvas.cpp
- *
- * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
- * (c) 2013 Alexandre Quessy -- alexandre(@)quessy(.)net
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "SourceGLCanvas.h"
-
-#include "MainWindow.h"
-
-
-SourceGLCanvas::SourceGLCanvas(MainWindow* mainWindow, QWidget* parent)
-  : MapperGLCanvas(mainWindow, parent)
-{
-}
-
-MShape::ptr SourceGLCanvas::getShapeFromMapping(const Mapping::ptr& mapping) const
-{
-  return (mapping.isNull() ? MShape::ptr() : mapping->getInputShape());
-}
-
-QSharedPointer<ShapeGraphicsItem> SourceGLCanvas::getShapeGraphicsItemFromMapping(const Mapping::ptr& mapping) const
-{
-  return (mapping.isNull() ? QSharedPointer<ShapeGraphicsItem>() : MainWindow::instance()->getMappingGuiByMappingId(mapping->getId())->getInputGraphicsItem());
-}
-
-//
-
-//void SourceGLCanvas::doDraw(QPainter* painter)
-//{
-//  if (getMainWindow()->hasCurrentMapping())
-//  {
-//    uint mappingId = getMainWindow()->getCurrentMappingId();
-//    const MappingGui::ptr& mapper = getMainWindow()->getMappingGuiByMappingId(mappingId);
-//    painter->save();
-//    mapper->drawInput(painter);
-//    painter->restore();
-//    if (displayControls())
-//    {
-//      painter->save();
-//      if (hasActiveVertex()) {
-//        QList<int> selectedVertices;
-//        selectedVertices.append(getActiveVertexIndex());
-//        mapper->drawInputControls(painter, &selectedVertices);
-//      }
-//      else
-//        mapper->drawInputControls(painter);
-//      painter->restore();
-//    }
-//  }
-//}
-
diff --git a/SourceGLCanvas.h b/SourceGLCanvas.h
deleted file mode 100644
index 77a2cf0..0000000
--- a/SourceGLCanvas.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * SourceGLCanvas.h
- *
- * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef SOURCEGLCANVAS_H_
-#define SOURCEGLCANVAS_H_
-
-#include <QGLWidget>
-
-#include "MapperGLCanvas.h"
-#include "DestinationGLCanvas.h"
-
-#include "Util.h"
-
-class SourceGLCanvas: public MapperGLCanvas
-{
-  Q_OBJECT
-
-public:
-  SourceGLCanvas(MainWindow* mainWindow, QWidget* parent = 0);
-  virtual ~SourceGLCanvas() {}
-
-  virtual bool isOutput() const { return false; }
-  virtual MShape::ptr getShapeFromMapping(const Mapping::ptr& mapping) const;
-  virtual QSharedPointer<ShapeGraphicsItem> getShapeGraphicsItemFromMapping(const Mapping::ptr& mapping) const;
-
-private:
-//  virtual void doDraw(QPainter* painter);
-};
-
-
-#endif /* DESTINATIONGLCANVAS_H_ */
diff --git a/mapmap.pro b/mapmap.pro
index ef07215..d1da342 100644
--- a/mapmap.pro
+++ b/mapmap.pro
@@ -10,7 +10,6 @@ HEADERS  = \
     Commands.h \
     ConcurrentQueue.h \
     ConsoleWindow.h \
-    DestinationGLCanvas.h \
     Element.h \
     Ellipse.h \
     MM.h \
@@ -43,7 +42,6 @@ HEADERS  = \
     Shapes.h \
     ShapeControlPainter.h \
     ShapeGraphicsItem.h \
-    SourceGLCanvas.h \
     Triangle.h \
     UidAllocator.h \
     Util.h
@@ -51,7 +49,6 @@ HEADERS  = \
 SOURCES  = \
     Commands.cpp \
     ConsoleWindow.cpp \
-    DestinationGLCanvas.cpp \
     Element.cpp \
     Ellipse.cpp \
     MM.cpp \
@@ -81,7 +78,6 @@ SOURCES  = \
     Shape.cpp \
     ShapeControlPainter.cpp \
     ShapeGraphicsItem.cpp \
-    SourceGLCanvas.cpp \
     UidAllocator.cpp \
     Util.cpp \
     main.cpp