From Eric Sokolowsky, support for mouse scroll wheel in osgGA/osgProducer.

include/osgGA/GUIEventAdapter

@@ -39,6 +39,7 @@ public:
         };
 
         enum EventType {
+            NONE=0,
             PUSH,
             RELEASE,
             DOUBLECLICK,
@@ -48,7 +49,10 @@ public:
             KEYUP,
             FRAME,
             RESIZE,
-            NONE
+            SCROLLUP,
+            SCROLLDOWN,
+            SCROLLLEFT,
+            SCROLLRIGHT
         };
 
         enum KeySymbol

include/osgProducer/EventAdapter

@@ -75,6 +75,9 @@ class OSGPRODUCER_EXPORT EventAdapter : public osgGA::GUIEventAdapter
         /** method for adapting resize events. */
         void adaptResize(double t, float Xmin, float Ymin, float Xmax, float Ymax);
 
+        /** method for adapting mouse scroll wheel events. */
+	void adaptMouseScroll(double t, Producer::KeyboardMouseCallback::ScrollingMotion sm);
+
         /** method for adapting mouse motion events whilst mouse buttons are pressed.*/
         void adaptMouseMotion(double t, float x, float y);
 

include/osgProducer/KeyboardMouseCallback

@@ -41,6 +41,7 @@ class OSGPRODUCER_EXPORT KeyboardMouseCallback : public Producer::KeyboardMouseC
         virtual ~KeyboardMouseCallback() {}
 
         // override KeyboardMouseCallback methods.
+        virtual void mouseScroll( Producer::KeyboardMouseCallback::ScrollingMotion sm );
         virtual void mouseMotion( float mx, float my);
         virtual void passiveMouseMotion( float mx, float my);