Selection tool displayed only when cursor is inside the GLViewer widget.

GLViewer/GLViewer.cpp

@@ -1019,7 +1019,7 @@ void GLViewer::paintGL()
     }
 
     // Display the selection tool, if selection mode is enabled.
-    if( isSelectionEnabled() )
+    if( isSelectionEnabled()  &&  m_IsCursorInside )
     {
         m_SelectionCurrentTool->displaySelectionState();
         m_SelectionCurrentTool->display();
@@ -1577,10 +1577,20 @@ bool GLViewer::imageOfCurrentDisplay( const GenericUIData *m, QImage &renderResu
 void GLViewer::enterEvent( QEvent* evt )
 {
     setFocus();
+    m_IsCursorInside = true;
+    update();
     QOpenGLWidget::enterEvent( evt );
 }
 
 
+void GLViewer::leaveEvent( QEvent* evt )
+{
+    m_IsCursorInside = false;
+    update();
+    QOpenGLWidget::leaveEvent( evt );
+}
+
+
 void GLViewer::mousePressEvent( QMouseEvent *evt )
 {
     if( dof() == DISPLAY_DOF_2D )

GLViewer/GLViewer.h

@@ -177,6 +177,8 @@ protected:
 
     bool                            m_IsSelectionAllowed;
 
+    bool                            m_IsCursorInside;
+
     /*****************************\
     | Constructor(s) / destructor |
     \*****************************/
@@ -197,6 +199,7 @@ protected:
     void                                        initMetricGrids();
 
     virtual void                                enterEvent( QEvent *evt );
+    virtual void                                leaveEvent( QEvent* evt );
     virtual void	                            mousePressEvent( QMouseEvent *evt );
     virtual void                                mouseReleaseEvent( QMouseEvent *evt );
 	virtual void	                            mouseMoveEvent( QMouseEvent *evt );