[CHANGE] pressing a ctrl key while picking an object with the mouse ignores...

[CHANGE] pressing a ctrl key while picking an object with the mouse ignores the first picked object, this lets the user pick something behind nav slices for instance

src/graphicsEngine/WPickHandler.cpp

@@ -34,6 +34,7 @@ WPickHandler::WPickHandler()
     : m_hitResult( WPickInfo() ),
       m_startPick( WPickInfo() ),
       m_shift( false ),
+      m_ctrl( false ),
       m_viewerName( "" )
 {
 }
@@ -42,6 +43,7 @@ WPickHandler::WPickHandler( std::string viewerName )
     : m_hitResult( WPickInfo() ),
       m_startPick( WPickInfo() ),
       m_shift( false ),
+      m_ctrl( false ),
       m_viewerName( viewerName )
 {
 }
@@ -90,6 +92,7 @@ bool WPickHandler::handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAda
         case osgGA::GUIEventAdapter::KEYUP : // Key on keyboard released.
         {
             m_shift = false;
+            m_ctrl = false;
             return false;
         }
         case osgGA::GUIEventAdapter::KEYDOWN : // Key on keyboard pushed.
@@ -109,6 +112,10 @@ bool WPickHandler::handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAda
             {
                 m_shift = true;
             }
+            if ( ea.getKey() == osgGA::GUIEventAdapter::KEY_Control_L ||  ea.getKey() == osgGA::GUIEventAdapter::KEY_Control_R )
+            {
+                m_ctrl = true;
+            }
             return false;
         }
         default:
@@ -179,6 +186,11 @@ void WPickHandler::pick( osgViewer::View* view, const osgGA::GUIEventAdapter& ea
             ++hitr;
         }
 
+        if ( m_ctrl && ( hitr != intersections.end() ) )
+        {
+            ++hitr;
+        }
+
         // if we have a previous pick we search for it in the list
         if( m_startPick.getName() != ""  && m_startPick.getName() != "unpick" )
         {

src/graphicsEngine/WPickHandler.h

@@ -113,6 +113,7 @@ protected:
     WPickInfo m_hitResult; //!< Textual representation of the result of a pick.
     WPickInfo m_startPick; //!< indicates what was first picked. Should be "" after unpick.
     bool m_shift; //!< is shift pressed?
+    bool m_ctrl; //!< is ctrl pressed?
     std::string m_viewerName; //!< which viewer sends the signal
 
 private: