Prepare on the wheelEvent Onclick select visu mode and drag schema.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2112 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/diagramview.cpp

@@ -414,6 +414,7 @@ void DiagramView::pasteHere() {
 	 *  click to add an independent text field
 */
 void DiagramView::mousePressEvent(QMouseEvent *e) {
+	FlagMouseButtons_ = e -> buttons();
 	if (fresh_focus_in_) {
 		switchToVisualisationModeIfNeeded(e);
 		fresh_focus_in_ = false;
@@ -424,9 +425,31 @@ void DiagramView::mousePressEvent(QMouseEvent *e) {
 			is_adding_text = false;
 		}
 	}
+	// Select visualisation
+	if (FlagMouseButtons_ == Qt::MidButton){
+		if (!is_moving_view_) {
+			setVisualisationMode();
+			is_moving_view_ = true;
+			//TODO: Find a way to simulate the left click without generate a bug in the Events
+		}
+	}
 	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::mouseReleaseEvent(e);
+}
+
 /**
 	Manage wheel event of mouse
 	@param e QWheelEvent

sources/diagramview.h

@@ -52,6 +52,7 @@ class DiagramView : public QGraphicsView {
 	bool fresh_focus_in_;               ///< Indicate the focus was freshly gained
 	ElementsLocation next_location_;
 	QPoint next_position_;
+	int FlagMouseButtons_;
 	
 	// methods
 	public:
@@ -86,6 +87,7 @@ class DiagramView : public QGraphicsView {
 	
 	private:
 	void mousePressEvent(QMouseEvent *);
+	void mouseReleaseEvent(QMouseEvent *e);
 	void dragEnterEvent(QDragEnterEvent *);
 	void dragLeaveEvent(QDragLeaveEvent *);
 	void dragMoveEvent(QDragMoveEvent *);