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

*** 41,50 ****
--- 41,57 ----
  
  #import "sizecalc.h"
  
  #import <JavaRuntimeSupport/JavaRuntimeSupport.h>
  
+ // SCROLL PHASE STATE
+ #define SCROLL_PHASE_UNSUPPORTED 1
+ #define SCROLL_PHASE_BEGAN 2
+ #define SCROLL_PHASE_CONTINUED 3
+ #define SCROLL_PHASE_CANCELLED 4
+ #define SCROLL_PHASE_ENDED 5
+ 
  int gNumberOfButtons;
  jint* gButtonDownMasks;
  
  // Indicates that the app has been started with -XstartOnFirstThread
  // (directly or via WebStart settings), and AWT should not run its
*** 70,79 ****
--- 77,103 ----
  
  + (void) eventCountPlusPlus{
      eventCount++;
  }
  
+ + (jint) scrollStateWithEvent: (NSEvent*) event {
+ 
+     if ([event type] != NSScrollWheel) {
+         return 0;
+     }
+     
+     NSEventPhase phase = [event phase];
+     NSEventPhase momentumPhase = [event momentumPhase];
+     
+     if (!phase && !momentumPhase) return SCROLL_PHASE_UNSUPPORTED;
+     switch (phase) {
+         case NSEventPhaseBegan: return SCROLL_PHASE_BEGAN;
+         case NSEventPhaseCancelled: return SCROLL_PHASE_CANCELLED;
+         case NSEventPhaseEnded: return SCROLL_PHASE_ENDED;
+     }
+     return SCROLL_PHASE_CONTINUED;
+ }
  @end
  
  
  @interface AWTRunLoopObject : NSObject {
      BOOL _shouldEndRunLoop;