diff --git a/src/Main/FGEventHandler.cxx b/src/Main/FGEventHandler.cxx index 5599723fa..91d830e6d 100644 --- a/src/Main/FGEventHandler.cxx +++ b/src/Main/FGEventHandler.cxx @@ -205,7 +205,12 @@ bool FGEventHandler::handle(const osgGA::GUIEventAdapter& ea, return true; #endif int button; - if (ea.getScrollingMotion() == osgGA::GUIEventAdapter::SCROLL_UP) + if (ea.getScrollingMotion() == osgGA::GUIEventAdapter::SCROLL_2D) { + if (ea.getScrollingDeltaY() > 0) + button = 3; + else + button = 4; + } else if (ea.getScrollingMotion() == osgGA::GUIEventAdapter::SCROLL_UP) button = 3; else button = 4;