diff --git a/sources/diagramview.cpp b/sources/diagramview.cpp
index cc106bb5b..54f0a2208 100644
--- a/sources/diagramview.cpp
+++ b/sources/diagramview.cpp
@@ -410,12 +410,10 @@ void DiagramView::pasteHere() {
 }
 
 /**
-	Manage the press events click mouse :
+	Manage the events click mouse :
 	 *  click to add an independent text field
 */
 void DiagramView::mousePressEvent(QMouseEvent *e) {
-	// Save the button in flag
-	FlagMouseButtons_ = e->buttons();
 	if (fresh_focus_in_) {
 		switchToVisualisationModeIfNeeded(e);
 		fresh_focus_in_ = false;
@@ -426,47 +424,34 @@ void DiagramView::mousePressEvent(QMouseEvent *e) {
 			is_adding_text = false;
 		}
 	}
-	// Select visualisation
-	if (e->buttons() == Qt::MidButton){
-		if (!is_moving_view_) {
-			setVisualisationMode();
-			is_moving_view_ = true;
-			// And Simulate the left click
-			QGraphicsView::mousePressEvent( new QMouseEvent(QEvent::MouseButtonPress, e->pos(), Qt::LeftButton, Qt::LeftButton, Qt::NoModifier) );
-		}
-	}
 	QGraphicsView::mousePressEvent(e);
 }
 
 /**
-	Manage the release events click mouse :
-*/
-void DiagramView::mouseReleaseEvent(QMouseEvent *e) {
-	// Selection mode
-	if (FlagMouseButtons_ == Qt::MidButton){
-		if (is_moving_view_) {
-			setSelectionMode();
-			is_moving_view_ = false;
-		}
-	}
-	QGraphicsView::mousePressEvent(e);
-}
-
-/**
-	Manage wheel event of mouse for Zoom and scrolling
+	Manage wheel event of mouse
 	@param e QWheelEvent
 */
 void DiagramView::wheelEvent(QWheelEvent *e) {
-	if (!(e -> modifiers() & Qt::ControlModifier)) {
-		if (e -> delta() > 0) {
-			zoomIn();
+	//Zoom and scrolling
+	if (e->buttons() != Qt::MidButton) {
+		if (!(e -> modifiers() & Qt::ControlModifier)) {
+			if (e -> delta() > 0)	zoomIn();
+			else					zoomOut();
 		}
 		else {
-			zoomOut();
+			QAbstractScrollArea::wheelEvent(e);
 		}
 	}
-	else {
-		QAbstractScrollArea::wheelEvent(e);
+	// Or select visualisation or selection mode
+	else{
+		if (!is_moving_view_) {
+			setVisualisationMode();
+			is_moving_view_ = true;
+		}
+		else{
+			setSelectionMode();
+			is_moving_view_ = false;
+		}
 	}
 }
 
diff --git a/sources/diagramview.h b/sources/diagramview.h
index 148be9a19..da18124c4 100644
--- a/sources/diagramview.h
+++ b/sources/diagramview.h
@@ -52,7 +52,6 @@ class DiagramView : public QGraphicsView {
 	bool fresh_focus_in_;               ///< Indicate the focus was freshly gained
 	ElementsLocation next_location_;
 	QPoint next_position_;
-	int FlagMouseButtons_;               ///< save the buttons of mouse
 	
 	// methods
 	public:
@@ -87,7 +86,6 @@ class DiagramView : public QGraphicsView {
 	
 	private:
 	void mousePressEvent(QMouseEvent *);
-	void mouseReleaseEvent(QMouseEvent *);
 	void dragEnterEvent(QDragEnterEvent *);
 	void dragLeaveEvent(QDragLeaveEvent *);
 	void dragMoveEvent(QDragMoveEvent *);