Added extra access methods on osgProducer::KeyboardMouseCallback, and added

support for reading and writing keyboard/mouse events in osgcluster.

examples/osgcluster/receiver.cpp

@@ -17,6 +17,8 @@
 
 #include "receiver.h"
 
+#include <iostream>
+
 Receiver::Receiver( void )
 {
     _port = 0;
@@ -132,14 +134,21 @@ void Receiver::sync( void )
         }
     }
 #else
+    std::cout<<"A"<<std::endl;
     recvfrom( _so, (caddr_t)_buffer, _buffer_size, 0, 0, &size );
+    std::cout<<" B"<<std::endl;
     while( select( _so+1, &fdset, 0L, 0L, &tv ) )
     {
+        std::cout<<"  C"<<std::endl;
+    
         if( FD_ISSET( _so, &fdset ) )
         {
+            std::cout<<"   D"<<std::endl;
+
             recvfrom( _so, (caddr_t)_buffer, _buffer_size, 0, 0, &size );
         }
     }
+    std::cout<<"  E"<<std::endl;
 #endif
 }