src/java.desktop/macosx/native/libawt_lwawt/awt/AWTView.m

@@ -380,21 +380,28 @@
         clickCount = 0;
     } else {
         clickCount = [event clickCount];
     }
     
+    jdouble deltaX = [event deltaX];
+    jdouble deltaY = [event deltaY];
+    if ([AWTToolkit hasPreciseScrollingDeltas: event]) {
+        deltaX = [event scrollingDeltaX] * 0.1;
+        deltaY = [event scrollingDeltaY] * 0.1;
+    }
+    
     static JNF_CLASS_CACHE(jc_NSEvent, "sun/lwawt/macosx/NSEvent");
     static JNF_CTOR_CACHE(jctor_NSEvent, jc_NSEvent, "(IIIIIIIIDDI)V");
     jobject jEvent = JNFNewObject(env, jctor_NSEvent,
                                   [event type],
                                   [event modifierFlags],
                                   clickCount,
                                   [event buttonNumber],
                                   (jint)localPoint.x, (jint)localPoint.y,
                                   (jint)absP.x, (jint)absP.y,
-                                  [event deltaY],
-                                  [event deltaX],
+                                  deltaY,
+                                  deltaX,
                                   [AWTToolkit scrollStateWithEvent: event]);
     CHECK_NULL(jEvent);
     
     static JNF_CLASS_CACHE(jc_PlatformView, "sun/lwawt/macosx/CPlatformView");
     static JNF_MEMBER_CACHE(jm_deliverMouseEvent, jc_PlatformView, "deliverMouseEvent", "(Lsun/lwawt/macosx/NSEvent;)V");