Fix NEWT/AWT WindowClosing Unit Tests ; Review/Cleanup NEWT WindowClosing mechanism

Due to a NEWT WindowClosing event regression cause by NewtCanvasAWT changes
a review of our WindowClosing event mechanism was required.

Important cleanups are marked w/ '(*)' below.

I would have preferred to change the 'WindowListener.windowDestroyNotify(WindowEvent)'
method to pass a WindowCloseEvent object exposing more information like
toolkit or programmatic destruction and passing whether a 'closing' or 'nop' action
will be performed based on the WindowClosingMode.
For now I postponed this idea .. since it would change the API again,
but may reconsider it after merging the Android 'closing' patch.

- InputEvent.consumedTag -> NEWTEvent.consumedTag

- Window
  - (*) Promote setWindowDestroyNotifyAction(Runnable) to public,
        former WindowImpl.setHandleDestroyNotify(boolean).
    Using a Runnable action for WindowImpl.windowDestroyNotify(boolean)
    allows a setting defined alternative for destroy() and gets rid
    of [ab]using WindowListener.windowDestroyNotify(WindowEvent) for
    lifecycle actions. Used in:
      - GLWindow
      - GLAutoDrawableDelegate impl.

- WindowImpl
  - Respect NEWTEvent.consumedTag for WindowEvents as well

  - (*) Impl. setHandleDestroyNotify(boolean) (see above)

  - (*) destroy() simply sends out pre- and post- destruction Window events,
    where windowDestroyNotify(boolean) sends out the pre-destruction event if NOP.

  - (*) windowDestroyNotify(boolean) is public now, allowing other impl. details
    to follow proper destruction using handleDestroyNotify Runnable (-> NewtCanvasAWT).

- AWTWindowClosingProtocol:
  - addClosingListenerOneShot() -> addClosingListener()
    - calling addClosingListener() at addNotify()
    - calling removeClosingListener() at removeNotify()

  - AWTWindowClosingProtocol ctor taking NOP runnable,
    allowing to send WindowEvent.EVENT_WINDOW_DESTROY_NOTIFY at WindowClosingMode.DO_NOTHING_ON_CLOSE

  - add/remove listener on AWT-EDT

- AWTWindowAdapter
  - Add 'removeWindowClosingFrom(..)',
    allowing to remove window closing event fwd.

  - Also fwd windowClosed in window closing fwd'ing.

- NewtCanvasAWT
  - (*) Utilize AWTWindowClosingProtocol NOP runnable (see above)
    to fwd closing-NOP event to NEWT

  - (*) Unify remove/destroy code in destroyImpl(..)
    - !removeNotify -> destroy NEWT child programatic or as toolkit event
    - removeNotify || windowClosing -> destroy jawtWindow

  - (*) Remove AWTWindowAdapter/AWTParentWindowAdapter's windowClosingListener,
    since we utilize AWTWindowClosingProtocol

- DisplayImpl
  - Adding 'final void dispatchMessage(final NEWTEvent event)'
    allowing to remove the NEWTEventTask wrapping for no reason
    in enqueueEvent(..) if on EDT and waiting.

29 files changed, 536 insertions, 221 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/GLAutoDrawableDelegate.java b/src/jogl/classes/com/jogamp/opengl/GLAutoDrawableDelegate.java
index 206331ac0..0f0f03ac4 100644
--- a/src/jogl/classes/com/jogamp/opengl/GLAutoDrawableDelegate.java
+++ b/src/jogl/classes/com/jogamp/opengl/GLAutoDrawableDelegate.java
@@ -51,12 +51,12 @@ import jogamp.opengl.GLDrawableImpl;
  * utilizing already created {@link GLDrawable} and {@link GLContext} instances.
  * <p>
  * Since no native windowing system events are being processed, it is recommended
- * to handle at least:
+ * to handle at least the {@link com.jogamp.newt.event.WindowEvent window events}:
  * <ul>
  *   <li>{@link com.jogamp.newt.event.WindowListener#windowRepaint(com.jogamp.newt.event.WindowUpdateEvent) repaint} using {@link #windowRepaintOp()}</li>
  *   <li>{@link com.jogamp.newt.event.WindowListener#windowResized(com.jogamp.newt.event.WindowEvent) resize} using {@link #windowResizedOp()}</li>
- *   <li>{@link com.jogamp.newt.event.WindowListener#windowDestroyNotify(com.jogamp.newt.event.WindowEvent) destroy-notify}  using {@link #windowDestroyNotifyOp()}</li> 
- * </ul> 
+ * </ul>
+ * and setup a {@link com.jogamp.newt.Window#setWindowDestroyNotifyAction(Runnable) custom toolkit destruction} issuing {@link #windowDestroyNotifyOp()}.
  * </p>
  * <p> 
  * See example {@link com.jogamp.opengl.test.junit.jogl.acore.TestGLAutoDrawableDelegateNEWT TestGLAutoDrawableDelegateNEWT}.
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
index dc4fe955c..94e123b3e 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
@@ -176,7 +176,7 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable, WindowClosing
                 public void run() {
                     GLCanvas.this.destroyImpl( true );
                 }
-            });
+            }, null);
 
   /** Creates a new GLCanvas component with a default set of OpenGL
       capabilities, using the default OpenGL capabilities selection
@@ -460,7 +460,6 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable, WindowClosing
     if( isVisible() ) {
         Threading.invoke(true, displayOnEDTAction, getTreeLock());
     }
-    awtWindowClosingProtocol.addClosingListenerOneShot();
   }
 
   /**
@@ -568,7 +567,8 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable, WindowClosing
             // for all launch flavors (applet/javaws/..)
             // validateGLDrawable();            
         }
-    
+        awtWindowClosingProtocol.addClosingListener();
+
         if(DEBUG) {
             System.err.println(getThreadName()+": Info: addNotify - end: peer: "+getPeer());
         }
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
index 2b99bb570..6c28c75ab 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
@@ -174,7 +174,7 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable, WindowClosing
                 public void run() {
                     GLJPanel.this.destroy();
                 }
-            });
+            }, null);
 
   static {
     // Force eager initialization of part of the Java2D class since
@@ -369,6 +369,7 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable, WindowClosing
   @Override
   public void addNotify() {
     super.addNotify();
+    awtWindowClosingProtocol.addClosingListener();
     if (DEBUG) {
       System.err.println(getThreadName()+": GLJPanel.addNotify()");
     }
@@ -677,8 +678,6 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable, WindowClosing
     if (!isInitialized) {
         backend.initialize();
     }
-
-    awtWindowClosingProtocol.addClosingListenerOneShot();
   }
 
   @Override
diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/awt/AWTWindowClosingProtocol.java b/src/nativewindow/classes/com/jogamp/nativewindow/awt/AWTWindowClosingProtocol.java
index d78b4ac15..e3f85b948 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/awt/AWTWindowClosingProtocol.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/awt/AWTWindowClosingProtocol.java
@@ -33,22 +33,31 @@ import java.awt.Window;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.awt.event.WindowListener;
+
 import javax.media.nativewindow.WindowClosingProtocol;
 
+import jogamp.common.awt.AWTEDTExecutor;
 import jogamp.nativewindow.awt.AWTMisc;
 
 public class AWTWindowClosingProtocol implements WindowClosingProtocol {
 
   private Component comp;
-  private Runnable closingOperation;
-  private volatile boolean closingListenerSet = false;
+  private Runnable closingOperationClose;
+  private Runnable closingOperationNOP;
+  private boolean closingListenerSet = false;
   private Object closingListenerLock = new Object();
   private WindowClosingMode defaultCloseOperation = WindowClosingMode.DISPOSE_ON_CLOSE;
   private boolean defaultCloseOperationSetByUser = false;
 
-  public AWTWindowClosingProtocol(Component comp, Runnable closingOperation) {
+  /**
+   * @param comp mandatory AWT component which AWT Window is being queried by parent traversal
+   * @param closingOperationClose mandatory closing operation, triggered if windowClosing and {@link WindowClosingMode#DISPOSE_ON_CLOSE}
+   * @param closingOperationNOP optional closing operation, triggered if windowClosing and {@link WindowClosingMode#DO_NOTHING_ON_CLOSE}
+   */
+  public AWTWindowClosingProtocol(Component comp, Runnable closingOperationClose, Runnable closingOperationNOP) {
       this.comp = comp;
-      this.closingOperation = closingOperation;
+      this.closingOperationClose = closingOperationClose;
+      this.closingOperationNOP = closingOperationNOP;
   }
 
   class WindowClosingAdapter extends WindowAdapter {
@@ -59,54 +68,56 @@ public class AWTWindowClosingProtocol implements WindowClosingProtocol {
       if( WindowClosingMode.DISPOSE_ON_CLOSE == op ) {
           // we have to issue this call right away,
           // otherwise the window gets destroyed
-          closingOperation.run();
+          closingOperationClose.run();
+      } else if( null != closingOperationNOP ){
+          closingOperationNOP.run();
       }
     }
   }
   WindowListener windowClosingAdapter = new WindowClosingAdapter();
 
-  final boolean addClosingListenerImpl() {
-    Window w = AWTMisc.getWindow(comp);
-    if(null!=w) {
-        w.addWindowListener(windowClosingAdapter);
-        return true;
-    }
-    return false;
-  }
-
   /**
-   * Adds this closing listener to the components Window if exist and only one time.<br>
-   * Hence you may call this method every time to ensure it has been set,
-   * ie in case the Window parent is not available yet.
+   * Adds this closing listener to the components Window if exist and only one time.
+   * <p>
+   * If the closing listener is already added, and {@link IllegalStateException} is thrown. 
+   * </p>
    *
-   * @return
+   * @return true if added, otherwise false.
+   * @throws IllegalStateException
    */
-  public final boolean addClosingListenerOneShot() {
-    if(!closingListenerSet) { // volatile: ok
+  public final boolean addClosingListener() throws IllegalStateException {
       synchronized(closingListenerLock) {
-        if(!closingListenerSet) {
-            closingListenerSet=addClosingListenerImpl();
-            return closingListenerSet;
-        }
+          if(closingListenerSet) {
+              throw new IllegalStateException("WindowClosingListener already set");
+          }
+          final Window w = AWTMisc.getWindow(comp);
+          if(null!=w) {
+              AWTEDTExecutor.singleton.invoke(true, new Runnable() {
+                public void run() {
+                    w.addWindowListener(windowClosingAdapter);
+                } } );
+              closingListenerSet = true;
+              return true;
+          }
       }
-    }
-    return false;
+      return false;
   }
 
   public final boolean removeClosingListener() {
-    if(closingListenerSet) { // volatile: ok
       synchronized(closingListenerLock) {
-        if(closingListenerSet) {
-            Window w = AWTMisc.getWindow(comp);
-            if(null!=w) {
-                w.removeWindowListener(windowClosingAdapter);
-                closingListenerSet = false;
-                return true;
-            }
-        }
+          if(closingListenerSet) {
+              final Window w = AWTMisc.getWindow(comp);
+              if(null!=w) {
+                  AWTEDTExecutor.singleton.invoke(true, new Runnable() {
+                    public void run() {
+                        w.removeWindowListener(windowClosingAdapter);
+                    } } );
+                  closingListenerSet = false;
+                  return true;
+              }
+          }
       }
-    }
-    return false;
+      return false;
   }
 
   /**
diff --git a/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java b/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java
index 12e202975..a740ebbe0 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java
@@ -54,8 +54,7 @@ import javax.media.nativewindow.util.Point;
 public interface NativeWindow extends NativeSurface {
 
   /**
-   * destroys the window and releases
-   * windowing related resources.
+   * Destroys this window incl. releasing all related resources.
    */
   public void destroy();
 
diff --git a/src/nativewindow/classes/javax/media/nativewindow/WindowClosingProtocol.java b/src/nativewindow/classes/javax/media/nativewindow/WindowClosingProtocol.java
index 884c916e4..02f68f442 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/WindowClosingProtocol.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/WindowClosingProtocol.java
@@ -37,6 +37,10 @@ package javax.media.nativewindow;
  * this protocol default behavior {@link WindowClosingMode#DISPOSE_ON_CLOSE DISPOSE_ON_CLOSE} shall be used.</p>
  */
 public interface WindowClosingProtocol {
+    
+    /**
+     * Window closing mode if triggered by toolkit close operation.
+     */
     public enum WindowClosingMode {
         /**
          * Do nothing on native window close operation.<br>
diff --git a/src/newt/classes/com/jogamp/newt/Window.java b/src/newt/classes/com/jogamp/newt/Window.java
index cc42465f1..ab1eef308 100644
--- a/src/newt/classes/com/jogamp/newt/Window.java
+++ b/src/newt/classes/com/jogamp/newt/Window.java
@@ -28,12 +28,15 @@
 
 package com.jogamp.newt;
 
+import com.jogamp.newt.event.WindowEvent;
 import com.jogamp.newt.event.WindowListener;
 import com.jogamp.newt.event.KeyListener;
 import com.jogamp.newt.event.KeyEvent;
 import com.jogamp.newt.event.InputEvent;
 import com.jogamp.newt.event.MouseListener;
 import jogamp.newt.Debug;
+import jogamp.newt.WindowImpl;
+
 import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.NativeWindow;
@@ -104,14 +107,26 @@ public interface Window extends NativeWindow, WindowClosingProtocol {
     CapabilitiesImmutable getChosenCapabilities();
 
     /**
-     * Destroy the Window and it's children, incl. native destruction.<br>
-     * The Window can be recreate via {@link #setVisible(boolean) setVisible(true)}.
-     * <p>Visibility is set to false.</p>
+     * {@inheritDoc}
+     * <p>
+     * Also iterates through this window's children and destroys them.
+     * </p>
+     * <p>
+     * Visibility is set to false.
+     * </p>
+     * <p>
+     * Method sends out {@link WindowEvent#EVENT_WINDOW_DESTROY_NOTIFY pre-} and 
+     * {@link WindowEvent#EVENT_WINDOW_DESTROYED post-} destruction events
+     * to all of it's {@link WindowListener}.
+     * </p>
      * <p>
      * This method invokes {@link Screen#removeReference()} after it's own destruction,<br>
      * which will issue {@link Screen#destroy()} if the reference count becomes 0.<br>
      * This destruction sequence shall end up in {@link Display#destroy()}, if all reference counts become 0.
      * </p>
+     * <p>
+     * The Window can be recreate via {@link #setVisible(boolean) setVisible(true)}.
+     * </p>
      * @see #destroy()
      * @see #setVisible(boolean)
      */
@@ -119,6 +134,16 @@ public interface Window extends NativeWindow, WindowClosingProtocol {
     void destroy();
 
     /**
+     * Set a custom action handling destruction issued by a {@link WindowImpl#windowDestroyNotify(boolean) toolkit triggered window destroy}
+     * replacing the default {@link #destroy()} action.
+     * <p>
+     * The custom action shall call {@link #destroy()} 
+     * but may perform further tasks before and after.
+     * </p>
+     */
+    void setWindowDestroyNotifyAction(Runnable r);
+
+    /**
      * <code>setVisible</code> makes the window and children visible if <code>visible</code> is true,
      * otherwise the window and children becomes invisible.
      * <p>
@@ -383,10 +408,13 @@ public interface Window extends NativeWindow, WindowClosingProtocol {
     // WindowListener
     //
 
+    /**
+     * Send a {@link WindowEvent} to all {@link WindowListener}.
+     * @param eventType a {@link WindowEvent} type, e.g. {@link WindowEvent#EVENT_WINDOW_REPAINT}. 
+     */
     public void sendWindowEvent(int eventType);
 
     /**
-     *
      * Appends the given {@link com.jogamp.newt.event.WindowListener} to the end of
      * the list.
      */
diff --git a/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java b/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java
index 3503dabd5..3c10859bf 100644
--- a/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java
+++ b/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java
@@ -51,6 +51,7 @@ import javax.swing.MenuSelectionManager;
 
 import jogamp.nativewindow.awt.AWTMisc;
 import jogamp.newt.Debug;
+import jogamp.newt.WindowImpl;
 import jogamp.newt.awt.NewtFactoryAWT;
 import jogamp.newt.awt.event.AWTParentWindowAdapter;
 import jogamp.newt.driver.DriverClearFocus;
@@ -59,9 +60,9 @@ import com.jogamp.nativewindow.awt.AWTWindowClosingProtocol;
 import com.jogamp.nativewindow.awt.JAWTWindow;
 import com.jogamp.newt.Display;
 import com.jogamp.newt.Window;
-import com.jogamp.newt.event.InputEvent;
 import com.jogamp.newt.event.KeyEvent;
 import com.jogamp.newt.event.KeyListener;
+import com.jogamp.newt.event.NEWTEvent;
 import com.jogamp.newt.event.WindowAdapter;
 import com.jogamp.newt.event.WindowEvent;
 import com.jogamp.newt.event.WindowListener;
@@ -88,16 +89,22 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
     private boolean newtChildAttached = false;
     private boolean isOnscreen = true;
     private WindowClosingMode newtChildCloseOp;
-    private AWTAdapter awtAdapter = null;
+    private AWTParentWindowAdapter awtAdapter = null;
     private AWTAdapter awtMouseAdapter = null;
     private AWTAdapter awtKeyAdapter = null;
     
     private AWTWindowClosingProtocol awtWindowClosingProtocol =
           new AWTWindowClosingProtocol(this, new Runnable() {
                 public void run() {
-                    NewtCanvasAWT.this.destroy();
+                    NewtCanvasAWT.this.destroyImpl(false /* removeNotify */, true /* windowClosing */);
                 }
-            });
+            }, new Runnable() {
+                public void run() {
+                    if( newtChild != null ) {
+                        newtChild.sendWindowEvent(WindowEvent.EVENT_WINDOW_DESTROY_NOTIFY);
+                    }
+                }                
+            } );
 
     /**
      * Instantiates a NewtCanvas without a NEWT child.<br>
@@ -209,7 +216,7 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
          }
          public void keyTyped(KeyEvent e) {
              if(suppress) {
-                 e.setAttachment(InputEvent.consumedTag);
+                 e.setAttachment(NEWTEvent.consumedTag);
                  suppress = false; // reset
              }             
          }
@@ -239,7 +246,7 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
                  }
              }
              if(suppress) {
-                 evt.setAttachment(InputEvent.consumedTag);                 
+                 evt.setAttachment(NEWTEvent.consumedTag);                 
              }
              if(DEBUG) {
                  System.err.println("NewtCanvasAWT.focusKey: XXX: "+ks);
@@ -361,27 +368,17 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
                                    ", displayable "+isDisplayable()+", cont "+AWTMisc.getContainer(this));
             }
         }
+        awtWindowClosingProtocol.addClosingListener();
     }
 
     @Override
     public void removeNotify() {
+        awtWindowClosingProtocol.removeClosingListener();
+        
         if( Beans.isDesignTime() ) {
             super.removeNotify();
         } else {
-            java.awt.Container cont = AWTMisc.getContainer(this);
-            if(DEBUG) {
-                System.err.println("NewtCanvasAWT.removeNotify: "+newtChild+", from "+cont);
-            }
-            // Detach OLS early..
-            final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(newtChild, true);
-            if(null != ols && ols.isSurfaceLayerAttached()) {
-                ols.detachSurfaceLayer();
-            }    
-            detachNewtChild(cont); // will destroy context (offscreen -> onscreen) and implicit detachSurfaceLayer (if still attached)
-            
-            NewtFactoryAWT.destroyNativeWindow(jawtWindow);
-            jawtWindow=null;
-            
+            destroyImpl(true /* removeNotify */, false /* windowClosing */);
             super.removeNotify();
         }
     }
@@ -397,20 +394,32 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
      * @see Window#destroy()
      */
     public final void destroy() {
+        destroyImpl(false /* removeNotify */, false /* windowClosing */);
+    }
+    
+    private final void destroyImpl(boolean removeNotify, boolean windowClosing) {
         if( null !=newtChild ) {
             java.awt.Container cont = AWTMisc.getContainer(this);
             if(DEBUG) {
-                System.err.println("NewtCanvasAWT.destroy(): "+newtChild+", from "+cont);
+                System.err.println("NewtCanvasAWT.destroy(removeNotify "+removeNotify+", windowClosing "+windowClosing+"): nw "+newtWinHandleToHexString(newtChild)+", from "+cont);
             }
-            // Detach OLS early..
-            final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(newtChild, true);
-            if(null != ols && ols.isSurfaceLayerAttached()) {
-                ols.detachSurfaceLayer();
-            }    
-            detachNewtChild(cont); // will destroy context (offscreen -> onscreen) and implicit detachSurfaceLayer (if still attached)
-            newtChild.destroy();
-            newtChild=null;
+            detachNewtChild(cont);
+            
+            if( !removeNotify ) {
+                final Window cWin = newtChild;
+                final Window dWin = cWin.getDelegatedWindow();
+                newtChild=null;
+                if( windowClosing && dWin instanceof WindowImpl ) {
+                    ((WindowImpl)dWin).windowDestroyNotify(true);
+                } else {
+                    cWin.destroy();
+                }
+            }            
         }
+        if( ( removeNotify || windowClosing ) && null!=jawtWindow) {
+            NewtFactoryAWT.destroyNativeWindow(jawtWindow);
+            jawtWindow=null;
+        }        
     }
     
     @Override
@@ -501,8 +510,6 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
             return false;
         }
         
-        awtWindowClosingProtocol.addClosingListenerOneShot();
-        
         if( attachNewtChild && !newtChildAttached && null != newtChild ) {
             attachNewtChild(cont);
         }
@@ -535,11 +542,11 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
                     throw new InternalError("XXX");
                 }                
                 isOnscreen = jawtWindow.getGraphicsConfiguration().getChosenCapabilities().isOnscreen();
-                awtAdapter = new AWTParentWindowAdapter(jawtWindow, newtChild).addTo(this);
+                awtAdapter = (AWTParentWindowAdapter) new AWTParentWindowAdapter(jawtWindow, newtChild).addTo(this);
+                awtAdapter.removeWindowClosingFrom(this); // we utilize AWTWindowClosingProtocol triggered destruction!
                 newtChild.addWindowListener(clearAWTMenusOnNewtFocus);
                 newtChild.setFocusAction(focusAction); // enable AWT focus traversal
                 newtChildCloseOp = newtChild.setDefaultCloseOperation(WindowClosingMode.DO_NOTHING_ON_CLOSE);
-                awtWindowClosingProtocol.addClosingListenerOneShot();
                 keyboardFocusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
                 keyboardFocusManager.addPropertyChangeListener("focusOwner", focusPropertyChangeListener);
                 if(isOnscreen) {
@@ -554,7 +561,6 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
                 newtChild.removeWindowListener(clearAWTMenusOnNewtFocus);
                 newtChild.setFocusAction(null);
                 newtChild.setDefaultCloseOperation(newtChildCloseOp);
-                awtWindowClosingProtocol.removeClosingListener();
             }
         }
     }
@@ -611,7 +617,14 @@ public class NewtCanvasAWT extends java.awt.Canvas implements WindowClosingProto
       newtChild.setFocusAction(null); // no AWT focus traversal ..
       configureNewtChild(false);
       newtChild.setVisible(false);
-      newtChild.reparentWindow(null);
+      
+      // Detach OLS early..
+      final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(newtChild, true);
+      if(null != ols && ols.isSurfaceLayerAttached()) {
+          ols.detachSurfaceLayer();
+      }                  
+      newtChild.reparentWindow(null); // will destroy context (offscreen -> onscreen) and implicit detachSurfaceLayer (if still attached)
+      
       if(DEBUG) {
           System.err.println("NewtCanvasAWT.detachNewtChild.X: win "+newtWinHandleToHexString(newtChild)+", EDTUtil: cur "+newtChild.getScreen().getDisplay().getEDTUtil()+", comp "+this);
       }
diff --git a/src/newt/classes/com/jogamp/newt/awt/applet/JOGLNewtAppletBase.java b/src/newt/classes/com/jogamp/newt/awt/applet/JOGLNewtAppletBase.java
index 07004503e..c3ad51c96 100755
--- a/src/newt/classes/com/jogamp/newt/awt/applet/JOGLNewtAppletBase.java
+++ b/src/newt/classes/com/jogamp/newt/awt/applet/JOGLNewtAppletBase.java
@@ -300,9 +300,7 @@ public class JOGLNewtAppletBase implements KeyListener, GLEventListener {
                 glWindow.reparentWindow(awtParent);
             } else {
                 glWindow.reparentWindow(null);
-                if(glClosable) {
-                    glWindow.setDefaultCloseOperation(WindowClosingMode.DISPOSE_ON_CLOSE);
-                }
+                glWindow.setDefaultCloseOperation( glClosable ? WindowClosingMode.DISPOSE_ON_CLOSE : WindowClosingMode.DO_NOTHING_ON_CLOSE );
             }
        }
     }
diff --git a/src/newt/classes/com/jogamp/newt/event/InputEvent.java b/src/newt/classes/com/jogamp/newt/event/InputEvent.java
index 9ef4de2b6..4920b59ea 100644
--- a/src/newt/classes/com/jogamp/newt/event/InputEvent.java
+++ b/src/newt/classes/com/jogamp/newt/event/InputEvent.java
@@ -81,11 +81,6 @@ public abstract class InputEvent extends NEWTEvent
      return 0;
  }
  
- /** Object when attached via {@link #setAttachment(Object)} marks the event consumed,
-  * ie. stops propagating the event any further to the event listener. 
-  */
- public static final Object consumedTag = new Object();
- 
  protected InputEvent(short eventType, Object source, long when, int modifiers) {
     super(eventType, source, when);
     this.modifiers=modifiers;
diff --git a/src/newt/classes/com/jogamp/newt/event/NEWTEvent.java b/src/newt/classes/com/jogamp/newt/event/NEWTEvent.java
index b8de6eb18..6f4561ce6 100644
--- a/src/newt/classes/com/jogamp/newt/event/NEWTEvent.java
+++ b/src/newt/classes/com/jogamp/newt/event/NEWTEvent.java
@@ -48,6 +48,12 @@ package com.jogamp.newt.event;
  */
 @SuppressWarnings("serial")
 public class NEWTEvent extends java.util.EventObject {
+    /** 
+     * Object when attached via {@link #setAttachment(Object)} marks the event consumed,
+     * ie. stops propagating the event any further to the <i>other</i> event listener. 
+     */
+    public static final Object consumedTag = new Object();
+
     private final short eventType;
     private final long when;
     private Object attachment;
diff --git a/src/newt/classes/com/jogamp/newt/event/WindowListener.java b/src/newt/classes/com/jogamp/newt/event/WindowListener.java
index 011e1f654..dde182510 100644
--- a/src/newt/classes/com/jogamp/newt/event/WindowListener.java
+++ b/src/newt/classes/com/jogamp/newt/event/WindowListener.java
@@ -36,6 +36,7 @@ package com.jogamp.newt.event;
 
 import javax.media.nativewindow.WindowClosingProtocol;
 
+/** NEWT {@link WindowEvent} listener. */
 public interface WindowListener extends NEWTEventListener {
     /** Window is resized, your application shall respect the new window dimension. A repaint is recommended. */
     public void windowResized(WindowEvent e);
@@ -53,7 +54,9 @@ public interface WindowListener extends NEWTEventListener {
      **/
     public void windowDestroyNotify(WindowEvent e);
 
-    /** Window has been destroyed.*/
+    /** 
+     * Window has been destroyed.
+     */
     public void windowDestroyed(WindowEvent e);
 
     /** Window gained focus. */
diff --git a/src/newt/classes/com/jogamp/newt/event/awt/AWTAdapter.java b/src/newt/classes/com/jogamp/newt/event/awt/AWTAdapter.java
index 8991203d5..6de2eee45 100644
--- a/src/newt/classes/com/jogamp/newt/event/awt/AWTAdapter.java
+++ b/src/newt/classes/com/jogamp/newt/event/awt/AWTAdapter.java
@@ -181,8 +181,13 @@ public abstract class AWTAdapter implements java.util.EventListener
     /** @see #addTo(java.awt.Component) */
     public abstract AWTAdapter removeFrom(java.awt.Component awtComponent);
 
+    /**
+     * Enqueues the event to the {@link #getNewtWindow()} is not null.
+     */
     void enqueueEvent(boolean wait, com.jogamp.newt.event.NEWTEvent event) {
-        newtWindow.enqueueEvent(wait, event);
+        if( null != newtWindow ) {
+            newtWindow.enqueueEvent(wait, event);
+        }
     }
 }
 
diff --git a/src/newt/classes/com/jogamp/newt/event/awt/AWTWindowAdapter.java b/src/newt/classes/com/jogamp/newt/event/awt/AWTWindowAdapter.java
index 2d63ca455..e91bb2f82 100644
--- a/src/newt/classes/com/jogamp/newt/event/awt/AWTWindowAdapter.java
+++ b/src/newt/classes/com/jogamp/newt/event/awt/AWTWindowAdapter.java
@@ -66,13 +66,18 @@ public class AWTWindowAdapter
         return this;        
     }
     
-    public AWTAdapter removeFrom(java.awt.Component awtComponent) {
-        awtComponent.removeFocusListener(this);
-        awtComponent.removeComponentListener(this);
+    public AWTAdapter removeWindowClosingFrom(java.awt.Component awtComponent) {
         java.awt.Window win = getWindow(awtComponent);
         if( null != win && null != windowClosingListener ) {
             win.removeWindowListener(windowClosingListener);
         }
+        return this;        
+    }
+    
+    public AWTAdapter removeFrom(java.awt.Component awtComponent) {
+        awtComponent.removeFocusListener(this);
+        awtComponent.removeComponentListener(this);
+        removeWindowClosingFrom(awtComponent);
         if(awtComponent instanceof java.awt.Window) {
             ((java.awt.Window)awtComponent).removeWindowListener(this);
         }
@@ -220,9 +225,16 @@ public class AWTWindowAdapter
                 enqueueEvent(true, event);
             }
         }
+        public void windowClosed(java.awt.event.WindowEvent e) { 
+            com.jogamp.newt.event.WindowEvent event = AWTNewtEventFactory.createWindowEvent(e, newtWindow);
+            if(null!=newtListener) {
+                ((com.jogamp.newt.event.WindowListener)newtListener).windowDestroyed(event);
+            } else {
+                enqueueEvent(true, event);
+            }
+        }
 
         public void windowActivated(java.awt.event.WindowEvent e) { }
-        public void windowClosed(java.awt.event.WindowEvent e) { }
         public void windowDeactivated(java.awt.event.WindowEvent e) { }
         public void windowDeiconified(java.awt.event.WindowEvent e) { }
         public void windowIconified(java.awt.event.WindowEvent e) { }
diff --git a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
index 7fccb6622..ce50d95dd 100644
--- a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
+++ b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
@@ -100,7 +100,10 @@ public class GLWindow extends GLAutoDrawableBase implements GLAutoDrawable, Wind
     protected GLWindow(Window window) {
         super(null, null, false /* always handle device lifecycle ourselves */);
         this.window = (WindowImpl) window;
-        this.window.setHandleDestroyNotify(false);
+        this.window.setWindowDestroyNotifyAction( new Runnable() {
+            public void run() {
+                defaultWindowDestroyNotifyOp();
+            } } );
         window.addWindowListener(new WindowAdapter() {
                 @Override
                 public void windowRepaint(WindowUpdateEvent e) {
@@ -112,10 +115,6 @@ public class GLWindow extends GLAutoDrawableBase implements GLAutoDrawable, Wind
                     defaultWindowResizedOp(getWidth(), getHeight());
                 }
 
-                @Override
-                public void windowDestroyNotify(WindowEvent e) {
-                    defaultWindowDestroyNotifyOp();
-                }
             });
         this.window.setLifecycleHook(new GLLifecycleHook());
     }
@@ -390,6 +389,11 @@ public class GLWindow extends GLAutoDrawableBase implements GLAutoDrawable, Wind
     }
 
     @Override
+    public void setWindowDestroyNotifyAction(Runnable r) {
+        window.setWindowDestroyNotifyAction(r);
+    }
+    
+    @Override
     public final void setVisible(boolean visible) {
         window.setVisible(visible);
     }
diff --git a/src/newt/classes/jogamp/newt/DisplayImpl.java b/src/newt/classes/jogamp/newt/DisplayImpl.java
index 20b915cae..d4842ba2f 100644
--- a/src/newt/classes/jogamp/newt/DisplayImpl.java
+++ b/src/newt/classes/jogamp/newt/DisplayImpl.java
@@ -370,15 +370,8 @@ public abstract class DisplayImpl extends Display {
             DisplayImpl.this.dispatchMessages();
         } };
 
-    final void dispatchMessage(final NEWTEventTask eventTask) {
-        final NEWTEvent event = eventTask.get();
+    final void dispatchMessage(final NEWTEvent event) {
         try { 
-            if(null == event) {
-                // Ooops ?
-                System.err.println("Warning: event of eventTask is NULL");
-                Thread.dumpStack();
-                return;
-            }
             final Object source = event.getSource();        
             if(source instanceof NEWTEventConsumer) {
                 final NEWTEventConsumer consumer = (NEWTEventConsumer) source ;
@@ -396,6 +389,21 @@ public abstract class DisplayImpl extends Display {
             } else {
                 re = new RuntimeException(t);
             }
+            throw re;
+        }
+    }
+    
+    final void dispatchMessage(final NEWTEventTask eventTask) {
+        final NEWTEvent event = eventTask.get();
+        try { 
+            if(null == event) {
+                // Ooops ?
+                System.err.println("Warning: event of eventTask is NULL");
+                Thread.dumpStack();
+                return;
+            }
+            dispatchMessage(event);
+        } catch (RuntimeException re) {
             if( eventTask.isCallerWaiting() ) {
                 // propagate exception to caller
                 eventTask.setException(re);
@@ -451,7 +459,7 @@ public abstract class DisplayImpl extends Display {
         
         // can't wait if we are on EDT or NEDT -> consume right away
         if(wait && edtUtil.isCurrentThreadEDTorNEDT() ) {
-            dispatchMessage(new NEWTEventTask(e, null));
+            dispatchMessage(e);
             return;
         }
         
diff --git a/src/newt/classes/jogamp/newt/WindowImpl.java b/src/newt/classes/jogamp/newt/WindowImpl.java
index 222a1173c..66ca3e07d 100644
--- a/src/newt/classes/jogamp/newt/WindowImpl.java
+++ b/src/newt/classes/jogamp/newt/WindowImpl.java
@@ -110,7 +110,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
     private boolean pointerConfined = false;
     private LifecycleHook lifecycleHook = null;
 
-    private boolean handleDestroyNotify = true;
+    private Runnable windowDestroyNotifyAction = null;
 
     private FocusRunnable focusAction = null;
     private KeyListener keyboardFocusHandler = null;
@@ -864,8 +864,12 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
             _lock.lock();
             try {
                 if(DEBUG_IMPLEMENTATION) {
-                    System.err.println("Window DestroyAction() "+getThreadName());
+                    System.err.println("Window DestroyAction() hasScreen "+(null != screen)+", isNativeValid "+isNativeValid()+" - "+getThreadName());
                 }
+                
+                // send synced destroy-notify notification
+                sendWindowEvent(WindowEvent.EVENT_WINDOW_DESTROY_NOTIFY);
+                
                 // Childs first ..
                 synchronized(childWindowsLock) {
                   if(childWindows.size()>0) {
@@ -875,8 +879,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
                     while( clonedChildWindows.size() > 0 ) {
                       NativeWindow nw = clonedChildWindows.remove(0);
                       if(nw instanceof WindowImpl) {
-                          ((WindowImpl)nw).sendWindowEvent(WindowEvent.EVENT_WINDOW_DESTROY_NOTIFY);
-                          ((WindowImpl)nw).destroy();
+                          ((WindowImpl)nw).windowDestroyNotify(true);
                       } else {
                           nw.destroy();
                       }
@@ -1549,14 +1552,10 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
     public Object getWrappedWindow() {
         return null;
     }
-    
-    /**
-     * If set to true, the default value, this NEWT Window implementation will
-     * handle the destruction (ie {@link #destroy()} call) within {@link #windowDestroyNotify(boolean)} implementation.<br>
-     * If set to false, it's up to the caller/owner to handle destruction within {@link #windowDestroyNotify(boolean)}.
-     */
-    public void setHandleDestroyNotify(boolean b) {
-        handleDestroyNotify = b;
+
+    @Override
+    public void setWindowDestroyNotifyAction(Runnable r) {
+        windowDestroyNotifyAction = r;
     }
 
     /** 
@@ -2211,7 +2210,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
                 default:
                     throw new NativeWindowException("Unexpected mouse event type " + e.getEventType());
             }
-            consumed = InputEvent.consumedTag == e.getAttachment();
+            consumed = NEWTEvent.consumedTag == e.getAttachment();
         }
     }
 
@@ -2340,7 +2339,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
             default:
                 throw new NativeWindowException("Unexpected key event type " + e.getEventType());
         }
-        return InputEvent.consumedTag == e.getAttachment();
+        return NEWTEvent.consumedTag == e.getAttachment();
     }
     
     @SuppressWarnings("deprecation")
@@ -2446,7 +2445,8 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
         if(DEBUG_IMPLEMENTATION) {
             System.err.println("consumeWindowEvent: "+e+", visible "+isVisible()+" "+getX()+"/"+getY()+" "+getWidth()+"x"+getHeight());
         }
-        for(int i = 0; i < windowListeners.size(); i++ ) {
+        boolean consumed = false;
+        for(int i = 0; !consumed && i < windowListeners.size(); i++ ) {
             WindowListener l = windowListeners.get(i);
             switch(e.getEventType()) {
                 case WindowEvent.EVENT_WINDOW_RESIZED:
@@ -2475,6 +2475,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
                         new NativeWindowException("Unexpected window event type "
                                                   + e.getEventType());
             }
+            consumed = NEWTEvent.consumedTag == e.getAttachment();
         }
     }
 
@@ -2615,32 +2616,45 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
     }
     
     /**
-     * Triggered by implementation's WM events or programmatically
+     * Triggered by implementation's WM events or programmatic while respecting {@link #getDefaultCloseOperation()}.
      * 
      * @param force if true, overrides {@link #setDefaultCloseOperation(WindowClosingMode)} with {@link WindowClosingProtocol#DISPOSE_ON_CLOSE}
      *              and hence force destruction. Otherwise is follows the user settings.
      * @return true if this window is no more valid and hence has been destroyed, otherwise false.
      */
-    protected boolean windowDestroyNotify(boolean force) {
+    public boolean windowDestroyNotify(boolean force) {
+        final WindowClosingMode defMode = getDefaultCloseOperation();
+        final WindowClosingMode mode = force ? WindowClosingMode.DISPOSE_ON_CLOSE : defMode;
         if(DEBUG_IMPLEMENTATION) {
-            System.err.println("Window.windowDestroyNotify(force: "+force+") START "+getThreadName()+": "+this);
-        }
-        if(force) {
-            setDefaultCloseOperation(WindowClosingMode.DISPOSE_ON_CLOSE);
+            System.err.println("Window.windowDestroyNotify(force: "+force+", mode "+defMode+" -> "+mode+") "+getThreadName()+": "+this);
         }
-
-        // send synced destroy notifications
-        enqueueWindowEvent(true, WindowEvent.EVENT_WINDOW_DESTROY_NOTIFY);
-
-        if(handleDestroyNotify && WindowClosingMode.DISPOSE_ON_CLOSE == getDefaultCloseOperation()) {
-            destroy();
+        
+        if( WindowClosingMode.DISPOSE_ON_CLOSE == mode ) {
+            if(force) {
+                setDefaultCloseOperation(mode);
+            }
+            try {
+                if( null == windowDestroyNotifyAction ) {
+                    destroy();
+                } else {
+                    windowDestroyNotifyAction.run();
+                }
+            } finally {
+                if(force) {
+                    setDefaultCloseOperation(defMode);
+                }
+            }
+        } else {
+            // send synced destroy notifications
+            sendWindowEvent(WindowEvent.EVENT_WINDOW_DESTROY_NOTIFY);
         }
         
         final boolean destroyed = !isNativeValid();
 
         if(DEBUG_IMPLEMENTATION) {
-            System.err.println("Window.windowDestroyNotify(force: "+force+") END "+getThreadName()+": destroyed "+destroyed+", "+this);
-        }
+            System.err.println("Window.windowDestroyNotify(force: "+force+", mode "+mode+") END "+getThreadName()+": destroyed "+destroyed+", "+this);
+        }        
+        
         return destroyed;
     }
 
diff --git a/src/newt/classes/jogamp/newt/awt/event/AWTParentWindowAdapter.java b/src/newt/classes/jogamp/newt/awt/event/AWTParentWindowAdapter.java
index 701d9d60a..b348220d6 100644
--- a/src/newt/classes/jogamp/newt/awt/event/AWTParentWindowAdapter.java
+++ b/src/newt/classes/jogamp/newt/awt/event/AWTParentWindowAdapter.java
@@ -42,9 +42,7 @@ import com.jogamp.newt.event.awt.AWTWindowAdapter;
  * Specialized parent/client adapter,
  * where the NEWT child window really gets resized,
  * and the parent move window event gets discarded. */
-public class AWTParentWindowAdapter 
-    extends AWTWindowAdapter 
-    implements java.awt.event.HierarchyListener
+public class AWTParentWindowAdapter extends AWTWindowAdapter implements java.awt.event.HierarchyListener
 {
     NativeWindow downstreamParent;
     
diff --git a/src/newt/classes/jogamp/newt/driver/awt/WindowDriver.java b/src/newt/classes/jogamp/newt/driver/awt/WindowDriver.java
index bee43a95e..0172309fb 100644
--- a/src/newt/classes/jogamp/newt/driver/awt/WindowDriver.java
+++ b/src/newt/classes/jogamp/newt/driver/awt/WindowDriver.java
@@ -256,10 +256,7 @@ public class WindowDriver extends WindowImpl {
         }
         @Override
         public void windowDestroyed(WindowEvent e) {
-            if(isNativeValid()) {
-                WindowDriver.this.windowDestroyNotify(true);
-            }
-            
+            // Not fwd by AWTWindowAdapter, synthesized by NEWT
         }
         @Override
         public void windowGainedFocus(WindowEvent e) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateNEWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateNEWT.java
new file mode 100644
index 000000000..2729d6a5d
--- /dev/null
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateNEWT.java
@@ -0,0 +1,160 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+ 
+package com.jogamp.opengl.test.junit.jogl.acore;
+
+import java.io.IOException;
+
+import javax.media.opengl.GLCapabilities;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLEventListener;
+import javax.media.opengl.GLProfile;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.jogamp.newt.NewtFactory;
+import com.jogamp.newt.Window;
+import com.jogamp.newt.event.WindowAdapter;
+import com.jogamp.newt.event.WindowEvent;
+import com.jogamp.newt.event.WindowUpdateEvent;
+import com.jogamp.opengl.GLAutoDrawableDelegate;
+import com.jogamp.opengl.test.junit.jogl.demos.es2.GearsES2;
+import com.jogamp.opengl.test.junit.util.AWTRobotUtil;
+import com.jogamp.opengl.test.junit.util.MiscUtils;
+import com.jogamp.opengl.test.junit.util.QuitAdapter;
+import com.jogamp.opengl.test.junit.util.UITestCase;
+import com.jogamp.opengl.util.Animator;
+
+/**
+ * Test using a NEWT {@link Window} for onscreen case.
+ * <p>
+ * Creates a {@link GLDrawable} using the 
+ * {@link GLDrawableFactory#createGLDrawable(javax.media.nativewindow.NativeSurface) factory model}.
+ * The {@link GLContext} is derived {@link GLDrawable#createContext(GLContext) from the drawable}.
+ * </p>
+ * <p>
+ * Finally a {@link GLAutoDrawableDelegate} is created with the just created {@link GLDrawable} and {@link GLContext}.
+ * It is being used to run the {@link GLEventListener}.  
+ * </p> 
+ */
+public class TestGLAutoDrawableDelegateNEWT extends UITestCase {
+    static long duration = 500; // ms
+    
+    void doTest(GLCapabilitiesImmutable reqGLCaps, GLEventListener demo) throws InterruptedException {
+        final GLDrawableFactory factory = GLDrawableFactory.getFactory(reqGLCaps.getGLProfile());
+        
+        //
+        // Create native windowing resources .. X11/Win/OSX
+        // 
+        final Window window = NewtFactory.createWindow(reqGLCaps);
+        Assert.assertNotNull(window);
+        window.setSize(640, 400);
+        window.setVisible(true);
+        Assert.assertTrue(AWTRobotUtil.waitForVisible(window, true));
+        Assert.assertTrue(AWTRobotUtil.waitForRealized(window, true));
+        System.out.println("Window: "+window.getClass().getName());
+        
+        final GLDrawable drawable = factory.createGLDrawable(window);
+        Assert.assertNotNull(drawable);
+        drawable.setRealized(true);
+        
+        final GLAutoDrawableDelegate glad = new GLAutoDrawableDelegate(drawable, drawable.createContext(null), window, false, null) {
+                @Override
+                protected void destroyImplInLock() {
+                    super.destroyImplInLock();  // destroys drawable/context
+                    window.destroy(); // destroys the actual window, incl. the device
+                }
+            };
+        
+        window.setWindowDestroyNotifyAction( new Runnable() {
+            public void run() {
+                glad.windowDestroyNotifyOp();
+            } } );
+                
+        window.addWindowListener(new WindowAdapter() {
+                @Override
+                public void windowRepaint(WindowUpdateEvent e) {
+                    glad.windowRepaintOp();
+                }
+
+                @Override
+                public void windowResized(WindowEvent e) {
+                    glad.windowResizedOp(window.getWidth(), window.getHeight());
+                }
+            });
+
+        glad.addGLEventListener(demo);
+                
+        QuitAdapter quitAdapter = new QuitAdapter();
+        //glWindow.addKeyListener(new TraceKeyAdapter(quitAdapter));
+        //glWindow.addWindowListener(new TraceWindowAdapter(quitAdapter));
+        window.addKeyListener(quitAdapter);
+        window.addWindowListener(quitAdapter);
+        
+        Animator animator = new Animator();
+        animator.setUpdateFPSFrames(60, System.err);
+        animator.setModeBits(false, Animator.MODE_EXPECT_AWT_RENDERING_THREAD);
+        animator.add(glad);
+        animator.start();
+        Assert.assertTrue(animator.isStarted());
+        Assert.assertTrue(animator.isAnimating());
+        
+        while(!quitAdapter.shouldQuit() && animator.isAnimating() && animator.getTotalFPSDuration()<duration) {
+            Thread.sleep(100);
+        }        
+        System.out.println("Fin start ...");
+        
+        animator.stop();
+        Assert.assertFalse(animator.isAnimating());
+        Assert.assertFalse(animator.isStarted());
+        glad.destroy();
+        System.out.println("Fin Drawable: "+drawable);        
+        System.out.println("Fin Window: "+window);
+    }
+
+    @Test
+    public void testOnScreenDblBuf() throws InterruptedException {
+        final GLCapabilities reqGLCaps = new GLCapabilities( GLProfile.getGL2ES2() );
+        doTest(reqGLCaps, new GearsES2(1));
+    }
+    
+    public static void main(String args[]) throws IOException {
+        for(int i=0; i<args.length; i++) {
+            if(args[i].equals("-time")) {
+                i++;
+                duration = MiscUtils.atol(args[i], duration);
+            }
+        }
+        org.junit.runner.JUnitCore.main(TestGLAutoDrawableDelegateNEWT.class.getName());
+    }
+
+}
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateOnOffscrnCapsNEWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateOnOffscrnCapsNEWT.java
index c5b4227c2..050e596cf 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateOnOffscrnCapsNEWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLAutoDrawableDelegateOnOffscrnCapsNEWT.java
@@ -55,6 +55,7 @@ import com.jogamp.opengl.test.junit.jogl.demos.es2.GearsES2;
 import com.jogamp.opengl.test.junit.jogl.demos.gl2.Gears;
 import com.jogamp.opengl.test.junit.util.AWTRobotUtil;
 import com.jogamp.opengl.test.junit.util.UITestCase;
+import jogamp.newt.WindowImpl;
 
 /**
  * Tests using a NEWT {@link Window} for on- and offscreen cases.
@@ -169,6 +170,11 @@ public class TestGLAutoDrawableDelegateOnOffscrnCapsNEWT extends UITestCase {
                 }
             };
         
+        window.setWindowDestroyNotifyAction( new Runnable() {
+            public void run() {
+                glad.windowDestroyNotifyOp();
+            } } );
+                
         window.addWindowListener(new WindowAdapter() {
                 @Override
                 public void windowRepaint(WindowUpdateEvent e) {
@@ -179,11 +185,6 @@ public class TestGLAutoDrawableDelegateOnOffscrnCapsNEWT extends UITestCase {
                 public void windowResized(WindowEvent e) {
                     glad.windowResizedOp(window.getWidth(), window.getHeight());
                 }
-
-                @Override
-                public void windowDestroyNotify(WindowEvent e) {
-                    glad.windowDestroyNotifyOp();
-                }
             });
 
         glad.addGLEventListener(demo);
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch01NEWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch01NEWT.java
index 8b1449493..cce4149ba 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch01NEWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch01NEWT.java
@@ -107,6 +107,11 @@ public class TestGLContextDrawableSwitch01NEWT extends UITestCase {
             }            
         };
         
+        window.setWindowDestroyNotifyAction( new Runnable() {
+            public void run() {
+                glad.windowDestroyNotifyOp();
+            } } );
+        
         // add basic window interaction
         window.addWindowListener(new WindowAdapter() {
             @Override
@@ -117,10 +122,6 @@ public class TestGLContextDrawableSwitch01NEWT extends UITestCase {
             public void windowResized(WindowEvent e) {
                 glad.windowResizedOp(window.getWidth(), window.getHeight());
             }
-            @Override
-            public void windowDestroyNotify(WindowEvent e) {
-                glad.windowDestroyNotifyOp();
-            }
         });
         window.addWindowListener(wl);
         
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch11NEWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch11NEWT.java
index 4af9a3932..2ef797fba 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch11NEWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLContextDrawableSwitch11NEWT.java
@@ -109,6 +109,11 @@ public class TestGLContextDrawableSwitch11NEWT extends UITestCase {
             }            
         };
         
+        window.setWindowDestroyNotifyAction( new Runnable() {
+            public void run() {
+                glad.windowDestroyNotifyOp();
+            } } );
+        
         // add basic window interaction
         window.addWindowListener(new WindowAdapter() {
             @Override
@@ -119,10 +124,6 @@ public class TestGLContextDrawableSwitch11NEWT extends UITestCase {
             public void windowResized(WindowEvent e) {
                 glad.windowResizedOp(window.getWidth(), window.getHeight());
             }
-            @Override
-            public void windowDestroyNotify(WindowEvent e) {
-                glad.windowDestroyNotifyOp();
-            }
         });
         window.addWindowListener(wl);
         
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestSharedContextNewtAWTBug523.java b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestSharedContextNewtAWTBug523.java
index 7894f3e86..fbea81a54 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestSharedContextNewtAWTBug523.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestSharedContextNewtAWTBug523.java
@@ -68,6 +68,7 @@ import com.jogamp.newt.awt.NewtCanvasAWT;
 import com.jogamp.newt.opengl.GLWindow;
 import com.jogamp.opengl.test.junit.util.AWTRobotUtil;
 import com.jogamp.opengl.test.junit.util.UITestCase;
+import com.jogamp.opengl.test.junit.util.AWTRobotUtil.WindowClosingListener;
 import com.jogamp.opengl.util.Animator;
 import com.jogamp.opengl.util.GLBuffers;
 
@@ -507,6 +508,8 @@ public class TestSharedContextNewtAWTBug523 extends UITestCase {
      */
     public void testContextSharingCreateVisibleDestroy(final boolean useNewt, final boolean shareContext) throws InterruptedException, InvocationTargetException {
         final JFrame frame = new JFrame("Simple JOGL App for testing context sharing");
+        final WindowClosingListener awtClosingListener = AWTRobotUtil.addClosingListener(frame);
+
         //
         // GLDrawableFactory factory = GLDrawableFactory.getFactory(GLProfile.get(GLProfile.GL2));
         // GLContext sharedContext = factory.getOrCreateSharedContext(factory.getDefaultDevice());
@@ -699,7 +702,7 @@ public class TestSharedContextNewtAWTBug523 extends UITestCase {
             while(animator.isAnimating() && animator.getTotalFPSDuration() < durationPerTest) {
                 Thread.sleep(100);
             }
-            AWTRobotUtil.closeWindow(frame, true);
+            AWTRobotUtil.closeWindow(frame, true, awtClosingListener);
             boolean windowClosed = closingSemaphore.tryAcquire(5000, TimeUnit.MILLISECONDS);
             Assert.assertEquals(true, windowClosed);
         } catch (InterruptedException e) {
diff --git a/src/test/com/jogamp/opengl/test/junit/newt/TestCloseNewtAWT.java b/src/test/com/jogamp/opengl/test/junit/newt/TestCloseNewtAWT.java
index 4ebb7dddd..d63193445 100644
--- a/src/test/com/jogamp/opengl/test/junit/newt/TestCloseNewtAWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/newt/TestCloseNewtAWT.java
@@ -45,6 +45,7 @@ import com.jogamp.newt.awt.NewtCanvasAWT;
 import com.jogamp.newt.opengl.GLWindow;
 import com.jogamp.opengl.test.junit.util.AWTRobotUtil;
 import com.jogamp.opengl.test.junit.util.UITestCase;
+import com.jogamp.opengl.test.junit.util.AWTRobotUtil.WindowClosingListener;
 
 public class TestCloseNewtAWT extends UITestCase {
 
@@ -107,9 +108,11 @@ public class TestCloseNewtAWT extends UITestCase {
                 frame.setVisible(true);
             }
         });
-        Thread.sleep(500);
+        Assert.assertEquals(true, AWTRobotUtil.waitForVisible(frame, true));
+        Assert.assertEquals(true,  AWTRobotUtil.waitForRealized(newtWindow, true));
+        final WindowClosingListener closingListener = AWTRobotUtil.addClosingListener(frame);
 
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, true));
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, true, closingListener));
     }
 
     public static void main(String[] args) {
diff --git a/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol01AWT.java b/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol01AWT.java
index 6aedb8433..5b7986f4d 100644
--- a/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol01AWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol01AWT.java
@@ -46,13 +46,14 @@ import com.jogamp.opengl.test.junit.jogl.demos.es2.GearsES2;
 
 import com.jogamp.opengl.test.junit.util.AWTRobotUtil;
 import com.jogamp.opengl.test.junit.util.UITestCase;
+import com.jogamp.opengl.test.junit.util.AWTRobotUtil.WindowClosingListener;
 
 public class TestWindowClosingProtocol01AWT extends UITestCase {
 
     @Test
     public void testCloseFrameGLCanvas() throws InterruptedException, InvocationTargetException {
         final Frame frame = new Frame("testCloseFrameGLCanvas AWT");
-
+        final WindowClosingListener closingListener = AWTRobotUtil.addClosingListener(frame);
         GLProfile glp = GLProfile.getGL2ES2();
         GLCapabilities caps = new GLCapabilities(glp);
         final GLCanvas glCanvas = new GLCanvas(caps);
@@ -74,12 +75,14 @@ public class TestWindowClosingProtocol01AWT extends UITestCase {
         WindowClosingMode op = glCanvas.getDefaultCloseOperation();
         Assert.assertEquals(WindowClosingMode.DO_NOTHING_ON_CLOSE, op);
 
-        Assert.assertEquals(true, AWTRobotUtil.closeWindow(frame, false)); // nop
+        Assert.assertEquals(true, AWTRobotUtil.closeWindow(frame, false, closingListener)); // nop
         Thread.sleep(100);
-        Assert.assertEquals(true, frame.isDisplayable());
+        Assert.assertEquals(true,  frame.isDisplayable());
         Assert.assertEquals(true,  frame.isVisible());
-        Assert.assertEquals(true, glCanvas.isValid());
-        Assert.assertEquals(true, glCanvas.isDisplayable());
+        Assert.assertEquals(true,  glCanvas.isValid());
+        Assert.assertEquals(true,  glCanvas.isDisplayable());
+        Assert.assertEquals(true,  closingListener.isWindowClosing());
+        Assert.assertEquals(false, closingListener.isWindowClosed());
 
         //
         // close with op (GLCanvas): DISPOSE_ON_CLOSE -> dispose
@@ -90,10 +93,12 @@ public class TestWindowClosingProtocol01AWT extends UITestCase {
         
         Thread.sleep(300);
 
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, false)); // no frame close, but GLCanvas's GL resources will be destroyed
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, false, closingListener)); // no frame close, but GLCanvas's GL resources will be destroyed
         Thread.sleep(100);
         Assert.assertEquals(true,  frame.isDisplayable());
         Assert.assertEquals(true,  frame.isVisible());
+        Assert.assertEquals(true,  closingListener.isWindowClosing());
+        Assert.assertEquals(false, closingListener.isWindowClosed());
         for (int wait=0; wait<AWTRobotUtil.POLL_DIVIDER && glCanvas.isRealized(); wait++) {
             Thread.sleep(AWTRobotUtil.TIME_SLICE);
         }
@@ -108,7 +113,8 @@ public class TestWindowClosingProtocol01AWT extends UITestCase {
     @Test
     public void testCloseJFrameGLCanvas() throws InterruptedException, InvocationTargetException {
         final JFrame frame = new JFrame("testCloseJFrameGLCanvas AWT");
-
+        final WindowClosingListener closingListener = AWTRobotUtil.addClosingListener(frame);
+        
         GLProfile glp = GLProfile.getGL2ES2();
         GLCapabilities caps = new GLCapabilities(glp);
         GLCanvas glCanvas = new GLCanvas(caps);
@@ -133,7 +139,7 @@ public class TestWindowClosingProtocol01AWT extends UITestCase {
 
         Thread.sleep(300);
         
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, false)); // nop
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, false, closingListener)); // nop
         Thread.sleep(100);
         Assert.assertEquals(true,  frame.isDisplayable());
         Assert.assertEquals(true,  glCanvas.isValid());
@@ -154,7 +160,7 @@ public class TestWindowClosingProtocol01AWT extends UITestCase {
         op = glCanvas.getDefaultCloseOperation();
         Assert.assertEquals(WindowClosingMode.DISPOSE_ON_CLOSE, op);
 
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, true));
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, true, closingListener));
         Assert.assertEquals(true,  AWTRobotUtil.waitForRealized(glCanvas, false));
         Assert.assertEquals(false, frame.isDisplayable());
         Assert.assertEquals(false, glCanvas.isValid());
diff --git a/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol02NEWT.java b/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol02NEWT.java
index 8cd44b82c..8d32beea3 100644
--- a/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol02NEWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol02NEWT.java
@@ -52,7 +52,7 @@ public class TestWindowClosingProtocol02NEWT extends UITestCase {
         GLProfile glp = GLProfile.getGL2ES2();
         GLCapabilities caps = new GLCapabilities(glp);
         final GLWindow glWindow = GLWindow.create(caps);
-        final AWTRobotUtil.WindowClosingListener windowClosingListener = AWTRobotUtil.addClosingListener(glWindow);
+        final AWTRobotUtil.WindowClosingListener closingListener = AWTRobotUtil.addClosingListener(glWindow);
 
         glWindow.addGLEventListener(new GearsES2());
         glWindow.setSize(512, 512);
@@ -72,10 +72,10 @@ public class TestWindowClosingProtocol02NEWT extends UITestCase {
         
         Thread.sleep(300);
 
-        Assert.assertEquals(true, AWTRobotUtil.closeWindow(glWindow, false)); // nop
+        Assert.assertEquals(true, AWTRobotUtil.closeWindow(glWindow, false, closingListener)); // nop
         Assert.assertEquals(true, glWindow.isNativeValid());
-        Assert.assertEquals(true, windowClosingListener.isWindowClosing());
-        windowClosingListener.reset();
+        Assert.assertEquals(true, closingListener.isWindowClosing());
+        closingListener.reset();
 
         //
         // close with op (GLCanvas): DISPOSE_ON_CLOSE -> dispose
@@ -84,9 +84,9 @@ public class TestWindowClosingProtocol02NEWT extends UITestCase {
         op = glWindow.getDefaultCloseOperation();
         Assert.assertEquals(WindowClosingMode.DISPOSE_ON_CLOSE, op);
 
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(glWindow, true));
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(glWindow, true, closingListener));
         Assert.assertEquals(false, glWindow.isNativeValid());
-        Assert.assertEquals(true,  windowClosingListener.isWindowClosing());
+        Assert.assertEquals(true,  closingListener.isWindowClosing());
     }
 
     public static void main(String[] args) {
diff --git a/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol03NewtAWT.java b/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol03NewtAWT.java
index be3c48fb6..b0a222a5a 100644
--- a/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol03NewtAWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/newt/TestWindowClosingProtocol03NewtAWT.java
@@ -46,17 +46,19 @@ import com.jogamp.opengl.test.junit.jogl.demos.es2.GearsES2;
 
 import com.jogamp.opengl.test.junit.util.AWTRobotUtil;
 import com.jogamp.opengl.test.junit.util.UITestCase;
+import com.jogamp.opengl.test.junit.util.AWTRobotUtil.WindowClosingListener;
 
 public class TestWindowClosingProtocol03NewtAWT extends UITestCase {
 
     @Test
     public void testCloseJFrameNewtCanvasAWT() throws InterruptedException, InvocationTargetException {
         final JFrame frame = new JFrame("testCloseJFrameNewtCanvasAWT");
-
+        final WindowClosingListener awtClosingListener = AWTRobotUtil.addClosingListener(frame);
+        
         GLProfile glp = GLProfile.getGL2ES2();
         GLCapabilities caps = new GLCapabilities(glp);
         final GLWindow glWindow = GLWindow.create(caps);
-        final AWTRobotUtil.WindowClosingListener windowClosingListener = AWTRobotUtil.addClosingListener(glWindow);
+        final AWTRobotUtil.WindowClosingListener newtClosingListener = AWTRobotUtil.addClosingListener(glWindow);
 
         glWindow.addGLEventListener(new GearsES2());
 
@@ -81,20 +83,26 @@ public class TestWindowClosingProtocol03NewtAWT extends UITestCase {
         //
         // close with op: DO_NOTHING_ON_CLOSE -> NOP / HIDE (default)
         //
-        Assert.assertEquals(JFrame.HIDE_ON_CLOSE, frame.getDefaultCloseOperation());
-        WindowClosingMode op = newtCanvas.getDefaultCloseOperation();
-        Assert.assertEquals(WindowClosingMode.DO_NOTHING_ON_CLOSE, op);
+        {
+            Assert.assertEquals(JFrame.HIDE_ON_CLOSE, frame.getDefaultCloseOperation());
+            WindowClosingMode op = newtCanvas.getDefaultCloseOperation();
+            Assert.assertEquals(WindowClosingMode.DO_NOTHING_ON_CLOSE, op);
+        }
 
         Thread.sleep(300);
         
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, false));
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, false, awtClosingListener));
         Assert.assertEquals(true,  frame.isDisplayable());
         Assert.assertEquals(false, frame.isVisible());
         Assert.assertEquals(true,  newtCanvas.isValid());
         Assert.assertEquals(true,  newtCanvas.isDisplayable());
         Assert.assertEquals(true,  glWindow.isNativeValid());
-        Assert.assertEquals(true,  windowClosingListener.isWindowClosing());
-        windowClosingListener.reset();
+        Assert.assertEquals(true,  awtClosingListener.isWindowClosing());
+        Assert.assertEquals(false, awtClosingListener.isWindowClosed());
+        Assert.assertEquals(true,  newtClosingListener.isWindowClosing());
+        Assert.assertEquals(false, newtClosingListener.isWindowClosed());
+        awtClosingListener.reset();
+        newtClosingListener.reset();
 
         SwingUtilities.invokeAndWait(new Runnable() {
             public void run() {
@@ -107,20 +115,25 @@ public class TestWindowClosingProtocol03NewtAWT extends UITestCase {
         //
         // close with op (JFrame): DISPOSE_ON_CLOSE -- newtCanvas -- glWindow --> dispose
         //
-        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-        Assert.assertEquals(JFrame.DISPOSE_ON_CLOSE, frame.getDefaultCloseOperation());
-        op = newtCanvas.getDefaultCloseOperation();
-        Assert.assertEquals(WindowClosingMode.DISPOSE_ON_CLOSE, op);
+        {
+            frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+            Assert.assertEquals(JFrame.DISPOSE_ON_CLOSE, frame.getDefaultCloseOperation());
+            WindowClosingMode op = newtCanvas.getDefaultCloseOperation();
+            Assert.assertEquals(WindowClosingMode.DISPOSE_ON_CLOSE, op);
+        }
         
         Thread.sleep(300);
 
-        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, true));
+        Assert.assertEquals(true,  AWTRobotUtil.closeWindow(frame, true, awtClosingListener));
         Assert.assertEquals(false, frame.isDisplayable());
         Assert.assertEquals(false, frame.isVisible());
         Assert.assertEquals(false, newtCanvas.isValid());
         Assert.assertEquals(false, newtCanvas.isDisplayable());
         Assert.assertEquals(false, glWindow.isNativeValid());
-        Assert.assertEquals(true,  windowClosingListener.isWindowClosing());
+        Assert.assertEquals(true,  awtClosingListener.isWindowClosing());
+        Assert.assertEquals(true,  awtClosingListener.isWindowClosed());
+        Assert.assertEquals(true,  newtClosingListener.isWindowClosing());
+        Assert.assertEquals(true,  newtClosingListener.isWindowClosed());
     }
 
     public static void main(String[] args) {
diff --git a/src/test/com/jogamp/opengl/test/junit/util/AWTRobotUtil.java b/src/test/com/jogamp/opengl/test/junit/util/AWTRobotUtil.java
index ffc42e318..8b46760e1 100644
--- a/src/test/com/jogamp/opengl/test/junit/util/AWTRobotUtil.java
+++ b/src/test/com/jogamp/opengl/test/junit/util/AWTRobotUtil.java
@@ -28,6 +28,7 @@
  
 package com.jogamp.opengl.test.junit.util;
 
+import jogamp.common.awt.AWTEDTExecutor;
 import jogamp.newt.WindowImplAccess;
 
 import java.lang.reflect.InvocationTargetException;
@@ -41,6 +42,8 @@ import javax.media.opengl.awt.GLCanvas;
 
 import org.junit.Assert;
 
+import com.jogamp.newt.event.WindowEvent;
+
 public class AWTRobotUtil {
 
     static final boolean DEBUG = false;
@@ -646,16 +649,19 @@ public class AWTRobotUtil {
      *
      * @param obj either an AWT Window (Frame, JFrame) or NEWT Window
      * @param willClose indicating that the window will close, hence this method waits for the window to be closed
+     * @param wcl the WindowClosingListener to determine whether the AWT or NEWT widget has been closed. It should be attached 
+     *            to the widget ASAP before any other listener, e.g. via {@link #addClosingListener(Object)}. 
+     *            The WindowClosingListener will be reset before attempting to close the widget.   
      * @return True if the Window is closing and closed (if willClose is true), each within TIME_OUT
      * @throws InterruptedException
      */
-    public static boolean closeWindow(Object obj, boolean willClose) throws InterruptedException, InvocationTargetException {
-        WindowClosingListener closingListener = addClosingListener(obj);
+    public static boolean closeWindow(Object obj, boolean willClose, WindowClosingListener closingListener) throws InterruptedException {
+        closingListener.reset();
         if(obj instanceof java.awt.Window) {
             final java.awt.Window win = (java.awt.Window) obj;
             java.awt.Toolkit tk = java.awt.Toolkit.getDefaultToolkit();
             final java.awt.EventQueue evtQ = tk.getSystemEventQueue();
-            java.awt.EventQueue.invokeAndWait(new Runnable() {
+            AWTEDTExecutor.singleton.invoke(true, new Runnable() {
                 public void run() {
                     evtQ.postEvent(new java.awt.event.WindowEvent(win, java.awt.event.WindowEvent.WINDOW_CLOSING));
                 } });
@@ -675,12 +681,15 @@ public class AWTRobotUtil {
         return wait<POLL_DIVIDER;
     }
 
-    public static WindowClosingListener addClosingListener(Object obj) throws InterruptedException {
+    public static WindowClosingListener addClosingListener(Object obj) {
         WindowClosingListener cl = null;
         if(obj instanceof java.awt.Window) {
-            java.awt.Window win = (java.awt.Window) obj;
-            AWTWindowClosingAdapter acl = new AWTWindowClosingAdapter();
-            win.addWindowListener(acl);
+            final java.awt.Window win = (java.awt.Window) obj;
+            final AWTWindowClosingAdapter acl = new AWTWindowClosingAdapter();
+            AWTEDTExecutor.singleton.invoke(true, new Runnable() {
+                public void run() {
+                    win.addWindowListener(acl);
+                } } );
             cl = acl;
         } else if(obj instanceof com.jogamp.newt.Window) {
             com.jogamp.newt.Window win = (com.jogamp.newt.Window) obj;
@@ -694,53 +703,77 @@ public class AWTRobotUtil {
     }
     public static interface WindowClosingListener {
         void reset();
+        public int getWindowClosingCount();
+        public int getWindowClosedCount();
         public boolean isWindowClosing();
         public boolean isWindowClosed();
     }
     static class AWTWindowClosingAdapter
             extends java.awt.event.WindowAdapter implements WindowClosingListener
     {
-        volatile boolean closing = false;
-        volatile boolean closed = false;
+        volatile int closing = 0;
+        volatile int closed = 0;
 
         public void reset() {
-            closing = false;
-            closed = false;
+            closing = 0;
+            closed = 0;
         }
-        public boolean isWindowClosing() {
+        public int getWindowClosingCount() {
             return closing;
         }
-        public boolean isWindowClosed() {
+        public int getWindowClosedCount() {
             return closed;
         }
+        public boolean isWindowClosing() {
+            return 0 < closing;
+        }
+        public boolean isWindowClosed() {
+            return 0 < closed;
+        }
         public void windowClosing(java.awt.event.WindowEvent e) {
-            closing = true;
+            closing++;
+            System.err.println("AWTWindowClosingAdapter.windowClosing: "+this);
         }
         public void windowClosed(java.awt.event.WindowEvent e) {
-            closed = true;
+            closed++;
+            System.err.println("AWTWindowClosingAdapter.windowClosed: "+this);
+        }
+        public String toString() {
+            return "AWTWindowClosingAdapter[closing "+closing+", closed "+closed+"]";
         }
     }
     static class NEWTWindowClosingAdapter
             extends com.jogamp.newt.event.WindowAdapter implements WindowClosingListener
     {
-        volatile boolean closing = false;
-        volatile boolean closed = false;
+        volatile int closing = 0;
+        volatile int closed = 0;
 
         public void reset() {
-            closing = false;
-            closed = false;
+            closing = 0;
+            closed = 0;
         }
-        public boolean isWindowClosing() {
+        public int getWindowClosingCount() {
             return closing;
         }
-        public boolean isWindowClosed() {
+        public int getWindowClosedCount() {
             return closed;
         }
-        public void windowDestroyNotify(com.jogamp.newt.event.WindowEvent e) {
-            closing = true;
+        public boolean isWindowClosing() {
+            return 0 < closing;
+        }
+        public boolean isWindowClosed() {
+            return 0 < closed;
+        }
+        public void windowDestroyNotify(WindowEvent e) {
+            closing++;
+            System.err.println("NEWTWindowClosingAdapter.windowDestroyNotify: "+this);
+        }
+        public void windowDestroyed(WindowEvent e) {
+            closed++;
+            System.err.println("NEWTWindowClosingAdapter.windowDestroyed: "+this);
         }
-        public void windowDestroyed(com.jogamp.newt.event.WindowEvent e) {
-            closed = true;
+        public String toString() {
+            return "NEWTWindowClosingAdapter[closing "+closing+", closed "+closed+"]";
         }
     }