diff --git a/app/SubWindowHandle.h b/app/SubWindowHandle.h
index 7390e60..82e7013 100644
--- a/app/SubWindowHandle.h
+++ b/app/SubWindowHandle.h
@@ -81,6 +81,10 @@ public:
   {
     return m_uiCategory;
   }
+
+Q_SIGNALS:
+  void zoomChanged();
+
 };
 
 }  // NAMESPACE
diff --git a/app/VideoSubWindow.cpp b/app/VideoSubWindow.cpp
index ce00285..c56c84e 100644
--- a/app/VideoSubWindow.cpp
+++ b/app/VideoSubWindow.cpp
@@ -93,7 +93,8 @@ VideoSubWindow::VideoSubWindow( QWidget * parent, Bool isModule ) :
 
   // Create a new interface to show images
   m_cViewArea = new ViewArea( m_cScrollArea );
-  connect( m_cViewArea, SIGNAL( zoomFactorChanged( double , QPoint) ), this, SLOT( adjustScrollBarByZoom(double, QPoint) ) );
+  connect( m_cViewArea, SIGNAL( zoomFactorChanged( double , QPoint) ), this, SLOT( processZoomChanged(double, QPoint) ) );
+
   connect( m_cViewArea, SIGNAL( moveScroll( QPoint ) ), this, SLOT( adjustScrollBarByOffset(QPoint) ) );
   connect( m_cViewArea, SIGNAL( selectionChanged( QRect ) ), this, SLOT( updateSelectedArea( QRect ) ) );
   connect( m_cScrollArea->horizontalScrollBar(), SIGNAL( actionTriggered( int ) ), this, SLOT( updateLastScrollValue() ) );
@@ -406,6 +407,12 @@ Void VideoSubWindow::scaleView( const QSize & size )
   updateLastScrollValue();
 }
 
+Void VideoSubWindow::processZoomChanged( Double factor, QPoint center )
+{
+  adjustScrollBarByZoom( factor, center );
+  emit zoomChanged();
+}
+
 void VideoSubWindow::adjustScrollBarByOffset( QPoint Offset )
 {
   QScrollBar *scrollBar = m_cScrollArea->horizontalScrollBar();
@@ -420,7 +427,7 @@ void VideoSubWindow::adjustScrollBarByOffset( QPoint Offset )
 
 // This function was developed with help of the schematics presented in
 // http://stackoverflow.com/questions/13155382/jscrollpane-zoom-relative-to-mouse-position
-void VideoSubWindow::adjustScrollBarByZoom( double factor, QPoint center )
+Void VideoSubWindow::adjustScrollBarByZoom( Double factor, QPoint center )
 {
   QScrollBar *scrollBar = m_cScrollArea->horizontalScrollBar();
   if( center.isNull() )
diff --git a/app/VideoSubWindow.h b/app/VideoSubWindow.h
index c98fdd9..2bb5ca4 100644
--- a/app/VideoSubWindow.h
+++ b/app/VideoSubWindow.h
@@ -159,18 +159,19 @@ public:
   Void applyModuleAllFrames();
 
   /**
-   * Reimplemented function from SubWindowHandle
+   * Virtual functions from SubWindowHandle
    */
   Void normalSize();
   Void zoomToFit();
   Void scaleView( Double scale );
 
-  Void scaleViewByRatio( Double ratio );
   Double getScaleFactor()
   {
     return m_cViewArea->getZoomFactor();
   }
 
+  Void adjustScrollBarByZoom( Double factor, QPoint center );
+
   QSize sizeHint() const;
 
   QString getWindowShortName()
@@ -200,7 +201,7 @@ protected:
 
 public Q_SLOTS:
   void updateSelectedArea( QRect area );
-  void adjustScrollBarByZoom( double factor, QPoint center );
+  void processZoomChanged( double , QPoint );
   void adjustScrollBarByOffset( QPoint Offset );
   void updateLastScrollValue();
 };
diff --git a/app/plaYUVerApp.cpp b/app/plaYUVerApp.cpp
index 3e3fc25..e96bd15 100644
--- a/app/plaYUVerApp.cpp
+++ b/app/plaYUVerApp.cpp
@@ -169,6 +169,7 @@ Void plaYUVerApp::loadFile( QString fileName, PlaYUVerStreamInfo* pStreamInfo )
     return;
   }
   videoSubWindow = new VideoSubWindow( this );  //createSubWindow();
+  SubWindowHandle *subWindow = videoSubWindow;
   if( !pStreamInfo )
   {
     Int idx = findPlaYUVerStreamInfo( m_aRecentFileStreamInfo, fileName );
@@ -192,7 +193,8 @@ Void plaYUVerApp::loadFile( QString fileName, PlaYUVerStreamInfo* pStreamInfo )
       connect( videoSubWindow->getViewArea(), SIGNAL( positionChanged(const QPoint &, PlaYUVerFrame *) ), this,
           SLOT( updatePixelValueStatusBar(const QPoint &, PlaYUVerFrame *) ) );
       connect( videoSubWindow->getViewArea(), SIGNAL( selectionChanged( QRect ) ), this, SLOT( updatePropertiesSelectedArea( QRect ) ) );
-      connect( videoSubWindow->getViewArea(), SIGNAL( zoomFactorChanged( double , QPoint ) ), this, SLOT( updateZoomFactorSBox() ) );
+
+      connect( subWindow, SIGNAL( zoomChanged() ), this, SLOT( updateZoomFactorSBox() ) );
 
       videoSubWindow->zoomToFit();
       videoSubWindow->getViewArea()->setTool( m_appTool );
@@ -744,7 +746,6 @@ Void plaYUVerApp::scaleFrame( int ratio )
   if( m_pcCurrentSubWindow )
   {
     m_pcCurrentSubWindow->scaleView( ( Double )( ratio ) / 100.0 );
-    updateZoomFactorSBox();
   }
 }