src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

*** 44,54 ****
  
  import com.apple.laf.*;
  import com.apple.laf.ClientPropertyApplicator.Property;
  import com.sun.awt.AWTUtilities;
  
! public class CPlatformWindow extends CFRetainedResource implements PlatformWindow {
      private native long nativeCreateNSWindow(long nsViewPtr, long styleBits, double x, double y, double w, double h);
      private static native void nativeSetNSWindowStyleBits(long nsWindowPtr, int mask, int data);
      private static native void nativeSetNSWindowMenuBar(long nsWindowPtr, long menuBarPtr);
      private static native Insets nativeGetNSWindowInsets(long nsWindowPtr);
      private static native void nativeSetNSWindowBounds(long nsWindowPtr, double x, double y, double w, double h);
--- 44,54 ----
  
  import com.apple.laf.*;
  import com.apple.laf.ClientPropertyApplicator.Property;
  import com.sun.awt.AWTUtilities;
  
! public final class CPlatformWindow extends CFRetainedResource implements PlatformWindow {
      private native long nativeCreateNSWindow(long nsViewPtr, long styleBits, double x, double y, double w, double h);
      private static native void nativeSetNSWindowStyleBits(long nsWindowPtr, int mask, int data);
      private static native void nativeSetNSWindowMenuBar(long nsWindowPtr, long menuBarPtr);
      private static native Insets nativeGetNSWindowInsets(long nsWindowPtr);
      private static native void nativeSetNSWindowBounds(long nsWindowPtr, double x, double y, double w, double h);
*** 197,207 ****
  
      // Bounds of the native widget but in the Java coordinate system.
      // In order to keep it up-to-date we will update them on
      // 1) setting native bounds via nativeSetBounds() call
      // 2) getting notification from the native level via deliverMoveResizeEvent()
!     private Rectangle nativeBounds;
      private volatile boolean isFullScreenMode = false;
  
      private Window target;
      private LWWindowPeer peer;
      private CPlatformView contentView;
--- 197,207 ----
  
      // Bounds of the native widget but in the Java coordinate system.
      // In order to keep it up-to-date we will update them on
      // 1) setting native bounds via nativeSetBounds() call
      // 2) getting notification from the native level via deliverMoveResizeEvent()
!     private Rectangle nativeBounds = new Rectangle(0, 0, 0, 0);
      private volatile boolean isFullScreenMode = false;
  
      private Window target;
      private LWWindowPeer peer;
      private CPlatformView contentView;
*** 867,876 ****
--- 867,882 ----
          if (surfaceData instanceof CGLSurfaceData) {
              ((CGLSurfaceData)surfaceData).validate();
          }
      }
  
+     private void flushBuffers() {
+         if (isVisible() && !nativeBounds.isEmpty()) {
+             LWCToolkit.getLWCToolkit().flushPendingEventsOnAppkit(target);
+         }
+     }
+ 
      /*************************************************************
       * Callbacks from the AWTWindow and AWTView objc classes.
       *************************************************************/
      private void deliverWindowFocusEvent(boolean gained){
          // Fix for 7150349: ingore "gained" notifications when the app is inactive.
*** 884,897 ****
      private void deliverMoveResizeEvent(int x, int y, int width, int height) {
          // when the content view enters the full-screen mode, the native
          // move/resize notifications contain a bounds smaller than
          // the whole screen and therefore we ignore the native notifications
          // and the content view itself creates correct synthetic notifications
!         if (isFullScreenMode) return;
  
          nativeBounds = new Rectangle(x, y, width, height);
          peer.notifyReshape(x, y, width, height);
          //TODO validateSurface already called from notifyReshape
          validateSurface();
      }
  
      private void deliverWindowClosingEvent() {
--- 890,909 ----
      private void deliverMoveResizeEvent(int x, int y, int width, int height) {
          // when the content view enters the full-screen mode, the native
          // move/resize notifications contain a bounds smaller than
          // the whole screen and therefore we ignore the native notifications
          // and the content view itself creates correct synthetic notifications
!         if (isFullScreenMode) {
!             return;
!         }
  
+         final Rectangle oldB = nativeBounds;
          nativeBounds = new Rectangle(x, y, width, height);
          peer.notifyReshape(x, y, width, height);
+         if (!oldB.getSize().equals(nativeBounds.getSize()) ) {
+             flushBuffers();
+         }
          //TODO validateSurface already called from notifyReshape
          validateSurface();
      }
  
      private void deliverWindowClosingEvent() {