Some cleanup in switching of image source

MainWindow.cpp

@@ -55,8 +55,10 @@ void MainWindow::handleSourceItemSelectionChanged()
   QListWidgetItem* item = sourceList->currentItem();
   int idx = item->data(Qt::UserRole).toInt();
   std::cout << "idx=" << idx << std::endl;
-  sourceCanvas->switchImage(idx);
-  sourceCanvas->repaint();
+  setCurrentPaint(idx);
+  sourceCanvas->updateCanvas();
+  //sourceCanvas->switchImage(idx);
+  //sourceCanvas->repaint();
   destinationCanvas->repaint();
 }
 
@@ -179,8 +181,8 @@ void MainWindow::createLayout()
   connect(sourceCanvas,      SIGNAL(quadChanged()),
           destinationCanvas, SLOT(updateCanvas()));
 
-  connect(destinationCanvas, SIGNAL(imageChanged()),
-          sourceCanvas,      SLOT(updateCanvas()));
+//  connect(destinationCanvas, SIGNAL(imageChanged()),
+//          sourceCanvas,      SLOT(updateCanvas()));
 
   sourceCanvas->setFocusPolicy(Qt::ClickFocus);
   destinationCanvas->setFocusPolicy(Qt::ClickFocus);

MainWindow.h

@@ -127,7 +127,7 @@ private:
 public:
   MappingManager& getMappingManager() { return *mappingManager; }
   int getCurrentPaintId() const { return currentPaintId; }
-  void setPaint(int id)
+  void setCurrentPaint(int id)
   {
     currentPaintId = id;
   }

MapperGLCanvas.cpp

@@ -192,11 +192,11 @@ void MapperGLCanvas::paintEvent(QPaintEvent* /* event */)
   updateGL();
 }
 
-void MapperGLCanvas::switchImage(int imageId)
-{
-  MainWindow::getInstance().setPaint(imageId);
-  emit imageChanged();
-}
+//void MapperGLCanvas::switchImage(int imageId)
+//{
+//  MainWindow::getInstance().setCurrentPaint(imageId);
+//  emit imageChanged();
+//}
 
 //QSize MapperGLCanvas::sizeHint() const
 //{