Introduced new scheme for handling mouse events with osgViewer. The new scheme enables robust event handling even when using distortion correction render to texture Cameras.

src/osgViewer/GraphicsWindowWin32.cpp

@@ -1184,6 +1184,9 @@ void GraphicsWindowWin32::init()
 
     _initialized = _ownsWindow ? createWindow() : setWindow(windowHandle);
     _valid       = _initialized;
+    
+    // make sure the event queue has the correct window rectangle size and input range
+    getEventQueue()->syncWindowRectangleWithGraphcisContext();
 
     // 2008/10/03
     // Few days ago NVidia released WHQL certified drivers ver 178.13.
@@ -1986,6 +1989,9 @@ bool GraphicsWindowWin32::realizeImplementation()
 
     _realized = true;
 
+    // make sure the event queue has the correct window rectangle size and input range
+    getEventQueue()->syncWindowRectangleWithGraphcisContext();
+
     return true;
 }