OSX/NEWT: Following CALayer streaming design, i.e. issue NSWindow/NSView Ops on main-thread w/o blocking; NEWT/WindowImpl: Volatile multithreaded mutable values

Similar to commits:
  28c6472335b924080d638b33a28f8f4eedb459b1
  f354fb204d8973453c538dda78a2c82c87be61dc

main-thread operations cannot block main-thread.

Luckily we are able to create the NSWindow and NSView instance uninitialized (deferred) on the current thread,
while issuing their initialization on the main-thread w/o blocking.

Further more a size glitch is fixed, which didn't take the title bar into account.

+++

NEWT/WindowImpl: Volatile multithreaded mutable values

Since position, size and other attributes might get changes off-thread, these fields needs to be volatile.

6 files changed, 373 insertions, 230 deletions

diff --git a/src/newt/classes/jogamp/newt/DefaultEDTUtil.java b/src/newt/classes/jogamp/newt/DefaultEDTUtil.java
index 3c015d3ec..651522799 100644
--- a/src/newt/classes/jogamp/newt/DefaultEDTUtil.java
+++ b/src/newt/classes/jogamp/newt/DefaultEDTUtil.java
@@ -332,6 +332,7 @@ public class DefaultEDTUtil implements EDTUtil {
                         validateNoRecursiveLocksHold();
                         if(!task.hasWaiter() && null != task.getThrowable()) {
                             // at least dump stack-trace in case nobody waits for result
+                            System.err.println("DefaultEDT.run(): Catched exception occured on thread "+Thread.currentThread().getName()+": "+task.toString());
                             task.getThrowable().printStackTrace();
                         }
                     }
diff --git a/src/newt/classes/jogamp/newt/WindowImpl.java b/src/newt/classes/jogamp/newt/WindowImpl.java
index 448b192a2..c01f880fc 100644
--- a/src/newt/classes/jogamp/newt/WindowImpl.java
+++ b/src/newt/classes/jogamp/newt/WindowImpl.java
@@ -82,9 +82,17 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
     
     /** Timeout of queued events (repaint and resize) */
     static final long QUEUED_EVENT_TO = 1200; // ms    
-    
+
+    //
+    // Volatile: Multithread Mutable Access
+    //    
     private volatile long windowHandle = 0; // lifecycle critical
     private volatile boolean visible = false; // lifecycle critical
+    private volatile boolean hasFocus = false;    
+    private volatile int width = 128, height = 128; // client-area size w/o insets, default: may be overwritten by user
+    private volatile int x = 64, y = 64; // client-area pos w/o insets
+    private volatile Insets insets = new Insets(); // insets of decoration (if top-level && decorated)
+        
     private RecursiveLock windowLock = LockFactory.createRecursiveLock();  // Window instance wide lock
     private int surfaceLockCount = 0; // surface lock recursion count
     
@@ -95,12 +103,9 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
     private AbstractGraphicsConfiguration config = null; // control access due to delegation
     protected CapabilitiesImmutable capsRequested = null;
     protected CapabilitiesChooser capabilitiesChooser = null; // default null -> default
-    private boolean fullscreen = false, hasFocus = false, brokenFocusChange = false;    
-    private int width = 128, height = 128; // client-area size w/o insets, default: may be overwritten by user
-    private int x = 64, y = 64; // client-area pos w/o insets
+    private boolean fullscreen = false, brokenFocusChange = false;    
     private boolean autoPosition = true; // default: true (allow WM to choose top-level position, if not set by user)
-    private Insets insets = new Insets(); // insets of decoration (if top-level && decorated)
-        
+    
     private int nfs_width, nfs_height, nfs_x, nfs_y; // non fullscreen client-area size/pos w/o insets
     private NativeWindow nfs_parent = null;          // non fullscreen parent, in case explicit reparenting is performed (offscreen)
     private String title = "Newt Window";
diff --git a/src/newt/classes/jogamp/newt/driver/macosx/WindowDriver.java b/src/newt/classes/jogamp/newt/driver/macosx/WindowDriver.java
index 6e9335f08..d3a92e023 100644
--- a/src/newt/classes/jogamp/newt/driver/macosx/WindowDriver.java
+++ b/src/newt/classes/jogamp/newt/driver/macosx/WindowDriver.java
@@ -49,7 +49,6 @@ import jogamp.newt.WindowImpl;
 import jogamp.newt.driver.DriverClearFocus;
 import jogamp.newt.driver.DriverUpdatePosition;
 
-import com.jogamp.common.util.Function;
 import com.jogamp.newt.event.InputEvent;
 import com.jogamp.newt.event.KeyEvent;
 
@@ -86,7 +85,7 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
             sscSurfaceHandle = 0;
             isOffscreenInstance = false;            
             if (0 != handle) {
-                OSXUtil.RunOnMainThread(true, new Runnable() {
+                OSXUtil.RunOnMainThread(false, new Runnable() {
                    public void run() {
                        close0( handle );
                    } } );
@@ -101,18 +100,31 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
     
     @Override
     protected int lockSurfaceImpl() {
-        if(!isOffscreenInstance) {
-            return lockSurface0(getWindowHandle()) ? LOCK_SUCCESS : LOCK_SURFACE_NOT_READY;
+        /** 
+         * if( isOffscreenInstance ) {
+         *    return LOCK_SUCCESS;
+         * }
+         */
+        final long w = getWindowHandle();
+        final long v = surfaceHandle;
+        if( 0 != v && 0 != w ) {
+            return lockSurface0(w, v) ? LOCK_SUCCESS : LOCK_SURFACE_NOT_READY;
         }
-        return LOCK_SUCCESS;
+        return LOCK_SURFACE_NOT_READY;
     }
 
     @Override
     protected void unlockSurfaceImpl() {
-        if(!isOffscreenInstance) {
-            final long h = getWindowHandle();
-            if(0 != h) {
-                unlockSurface0(h);
+        /** 
+         * if( isOffscreenInstance ) {
+         *    return;
+         * }
+         */
+        final long w = getWindowHandle();
+        final long v = surfaceHandle;
+        if(0 != w && 0 != v) {
+            if( !unlockSurface0(w, v) ) {
+                throw new NativeWindowException("Failed to unlock surface, probably not locked!");
             }
         }
     }
@@ -130,7 +142,7 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
         sscSurfaceHandle = surfaceHandle;
         if (isNativeValid()) {
             if (0 != sscSurfaceHandle) {
-                orderOut0( 0!=getParentWindowHandle() ? getParentWindowHandle() : getWindowHandle() );
+                orderOut0( 0 != getParentWindowHandle() ? getParentWindowHandle() : getWindowHandle() );
             } /** this is done by recreation! 
               else if (isVisible()){
                 orderFront0( 0!=getParentWindowHandle() ? getParentWindowHandle() : getWindowHandle() );
@@ -172,7 +184,10 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
             if(DEBUG_IMPLEMENTATION) {
                 System.err.println("MacWindow: updatePosition() ->  abs child-client-pos: "+pS);
             }
-            setWindowClientTopLeftPoint0(handle, pS.getX(), pS.getY());
+            OSXUtil.RunOnMainThread(false, new Runnable() {
+                public void run() {
+                    setWindowClientTopLeftPoint0(handle, pS.getX(), pS.getY());
+                } } );
             // no native event (fullscreen, some reparenting)
             positionChanged(true, pS.getX(), pS.getY());
         }
@@ -189,14 +204,17 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
                 if(DEBUG_IMPLEMENTATION) {
                     System.err.println("MacWindow: sizeChanged() "+newWidth+"x"+newHeight+" -> abs child-client-pos "+p0S);
                 }
-                setWindowClientTopLeftPoint0(getWindowHandle(), p0S.getX(), p0S.getY());
+                OSXUtil.RunOnMainThread(false, new Runnable() {
+                    public void run() {
+                        setWindowClientTopLeftPoint0(getWindowHandle(), p0S.getX(), p0S.getY());
+                    } } );
             }
         }
         super.sizeChanged(defer, newWidth, newHeight, force);
     }
    
     @Override
-    protected boolean reconfigureWindowImpl(int x, int y, int width, int height, int flags) {
+    protected boolean reconfigureWindowImpl(final int x, final int y, final int width, final int height, int flags) {
         final boolean _isOffscreenInstance = isOffscreenInstance(this, this.getParent());
         isOffscreenInstance = 0 != sscSurfaceHandle || _isOffscreenInstance;
         final PointImmutable pClientLevelOnSreen;
@@ -224,7 +242,7 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
                                ", ioi: "+_isOffscreenInstance+
                                ") -> "+isOffscreenInstance+
                                "\n\t, "+getReconfigureFlagsAsString(null, flags));
-            Thread.dumpStack();
+            // Thread.dumpStack();
         }
         
         if( 0 != ( FLAG_CHANGE_VISIBILITY & flags) && 0 == ( FLAG_IS_VISIBLE & flags) ) {
@@ -244,11 +262,12 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
                 createWindow(false, 0 != getWindowHandle(), pClientLevelOnSreen, width, height, 0 != ( FLAG_IS_FULLSCREEN & flags));
             }
             if(isVisible()) { flags |= FLAG_CHANGE_VISIBILITY; } 
-        }
-        if( width>0 && height>0 && x>=0 && y>=0 ) {
-            if( !isOffscreenInstance ) {                
-                // setContentSize0(getWindowHandle(), width, height);
-                setWindowClientTopLeftPointAndSize0(getWindowHandle(), pClientLevelOnSreen.getX(), pClientLevelOnSreen.getY(), width, height);
+        } else if( width>0 && height>0 ) {
+            if( !isOffscreenInstance ) {
+                OSXUtil.RunOnMainThread(false, new Runnable() {
+                    public void run() {
+                        setWindowClientTopLeftPointAndSize0(getWindowHandle(), pClientLevelOnSreen.getX(), pClientLevelOnSreen.getY(), width, height);
+                    } } );
             } // else offscreen size is realized via recreation
             // no native event (fullscreen, some reparenting)
             positionChanged(true,  x, y);
@@ -297,19 +316,25 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
     /** Callback for native screen position change event of the client area. */
     protected void screenPositionChanged(boolean defer, int newX, int newY) {        
         // passed coordinates are in screen position of the client area
-        if(DEBUG_IMPLEMENTATION) {
-            System.err.println("MacWindow.positionChanged (Screen Pos): ("+getThreadName()+"): (defer: "+defer+") "+getX()+"/"+getY()+" -> "+newX+"/"+newY);
-        }
         if(getWindowHandle()!=0) {            
             final NativeWindow parent = getParent();
-            if(null == parent) { 
+            if( null == parent || isOffscreenInstance ) {
+                if(DEBUG_IMPLEMENTATION) {
+                    System.err.println("MacWindow.positionChanged.0 (Screen Pos - TOP): ("+getThreadName()+"): (defer: "+defer+") "+getX()+"/"+getY()+" -> "+newX+"/"+newY);
+                }
                 positionChanged(defer, newX, newY);
             } else {
                 // screen position -> rel child window position
                 Point absPos = new Point(newX, newY);            
-                absPos.translate( parent.getLocationOnScreen(null).scale(-1, -1) );
+                Point parentOnScreen = parent.getLocationOnScreen(null);
+                absPos.translate( parentOnScreen.scale(-1, -1) );
+                if(DEBUG_IMPLEMENTATION) {
+                    System.err.println("MacWindow.positionChanged.1 (Screen Pos - CHILD): ("+getThreadName()+"): (defer: "+defer+") "+getX()+"/"+getY()+" -> absPos "+newX+"/"+newY+", parentOnScreen "+parentOnScreen+" -> "+absPos);
+                }
                 positionChanged(defer, absPos.getX(), absPos.getY());
             }
+        } else if(DEBUG_IMPLEMENTATION) {
+            System.err.println("MacWindow.positionChanged.2 (Screen Pos - IGN): ("+getThreadName()+"): (defer: "+defer+") "+getX()+"/"+getY()+" -> "+newX+"/"+newY);
         }
     }
     
@@ -383,65 +408,69 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
                               final PointImmutable pS, final int width, final int height, 
                               final boolean fullscreen) {
 
-        if(0!=getWindowHandle() && !recreate) {
+        if( 0 != getWindowHandle() && !recreate ) {
             return;
         }
 
         try {
-            if(0!=getWindowHandle()) {
-                // save the view .. close the window
-                surfaceHandle = OSXUtil.RunOnMainThread(true, new Function<Long, Object>() {
-                    public Long eval(Object... args) {
-                        return Long.valueOf( 
-                                changeContentView0(getParentWindowHandle(), getWindowHandle(), 0) );
-                    } } ).longValue();
-                if(recreate && 0==surfaceHandle) {
-                    throw new NativeWindowException("Internal Error - recreate, window but no view");
-                }
-                OSXUtil.RunOnMainThread(true, new Runnable() {
-                   public void run() {
-                       close0( getWindowHandle() );
-                   } } );
+            final long parentWin = getParentWindowHandle();
+            if( 0 != getWindowHandle() ) {                
+                final long thisWin = getWindowHandle();
                 setWindowHandle(0);
+                
+                if( 0 == surfaceHandle ) {
+                    throw new NativeWindowException("Internal Error - create w/ window, but no Newt NSView");
+                }                
+                OSXUtil.RunOnMainThread(false, new Runnable() {
+                    public void run() {
+                        changeContentView0(parentWin, thisWin, 0);
+                        close0( thisWin );
+                    } } );
             } else {
-                surfaceHandle = 0;
+                if( 0 != surfaceHandle ) {
+                    throw new NativeWindowException("Internal Error - create w/o window, but has Newt NSView");
+                }                
+                surfaceHandle = createView0(pS.getX(), pS.getY(), width, height, fullscreen, getScreen().getIndex());
+                if( 0 == surfaceHandle ) {
+                    throw new NativeWindowException("Could not create native view "+Thread.currentThread().getName()+" "+this);
+                }
             }
             
-            setWindowHandle( OSXUtil.RunOnMainThread(true, new Function<Long, Object>() {
-                public Long eval(Object... args) {
-                    return Long.valueOf(
-                            createWindow0( getParentWindowHandle(),
-                                    pS.getX(), pS.getY(), width, height,
-                                    (getGraphicsConfiguration().getChosenCapabilities().isBackgroundOpaque() && !offscreenInstance),
-                                    fullscreen,
-                                    ( (isUndecorated() || offscreenInstance) ? NSBorderlessWindowMask :
-                                      NSTitledWindowMask|NSClosableWindowMask|NSMiniaturizableWindowMask|NSResizableWindowMask ),
-                                    NSBackingStoreBuffered, 
-                                    getScreen().getIndex(), surfaceHandle) );
-                } } ).longValue() );                
-            
-            if (getWindowHandle() == 0) {
-                throw new NativeWindowException("Could create native window "+Thread.currentThread().getName()+" "+this);
-            }
-            surfaceHandle = contentView0(getWindowHandle());
-            if( offscreenInstance ) {
-                orderOut0(0!=getParentWindowHandle() ? getParentWindowHandle() : getWindowHandle());
-            } else {
-                setTitle0(getWindowHandle(), getTitle());
+            final long newWin = createWindow0( pS.getX(), pS.getY(), width, height, fullscreen, 
+                                               ( isUndecorated() || offscreenInstance ) ? NSBorderlessWindowMask :
+                                               NSTitledWindowMask|NSClosableWindowMask|NSMiniaturizableWindowMask|NSResizableWindowMask,
+                                               NSBackingStoreBuffered, getScreen().getIndex(), surfaceHandle);
+            if ( newWin == 0 ) {
+                throw new NativeWindowException("Could not create native window "+Thread.currentThread().getName()+" "+this);
             }
+            setWindowHandle( newWin );
+            
+            final boolean isOpaque = getGraphicsConfiguration().getChosenCapabilities().isBackgroundOpaque() && !offscreenInstance;
+            // Non blocking initialization on main-thread!                
+            OSXUtil.RunOnMainThread(false, new Runnable() {
+                public void run() {
+                    initWindow0( parentWin, newWin,
+                                 pS.getX(), pS.getY(), width, height,
+                                 isOpaque, fullscreen, offscreenInstance, getScreen().getIndex(), surfaceHandle); 
+                    if( offscreenInstance ) {
+                        orderOut0(0!=parentWin ? parentWin : newWin);
+                    } else {
+                        setTitle0(newWin, getTitle());
+                    }
+                } } );
         } catch (Exception ie) {
             ie.printStackTrace();
         }
     }
     
     protected static native boolean initIDs0();
+    private native long createView0(int x, int y, int w, int h, boolean fullscreen, int screen_idx);
+    private native long createWindow0(int x, int y, int w, int h, boolean fullscreen, int windowStyle, int backingStoreType, int screen_idx, long view);
     /** Must be called on Main-Thread */
-    private native long createWindow0(long parentWindowHandle, int x, int y, int w, int h,
-                                     boolean opaque, boolean fullscreen, int windowStyle,
-                                     int backingStoreType,
-                                     int screen_idx, long view);
-    private native boolean lockSurface0(long window);
-    private native void unlockSurface0(long window);
+    private native void initWindow0(long parentWindow, long window, int x, int y, int w, int h,
+                                    boolean opaque, boolean fullscreen, boolean offscreen, int screen_idx, long view);
+    private native boolean lockSurface0(long window, long view);
+    private native boolean unlockSurface0(long window, long view);
     private native void requestFocus0(long window, boolean force);
     private native void resignFocus0(long window);
     /** in case of a child window, it actually only issues orderBack(..) */
@@ -452,7 +481,7 @@ public class WindowDriver extends WindowImpl implements MutableSurface, DriverCl
     private native void setTitle0(long window, String title);
     private native long contentView0(long window);
     /** Must be called on Main-Thread */
-    private native long changeContentView0(long parentWindowOrViewHandle, long window, long view);
+    private native void changeContentView0(long parentWindowOrView, long window, long view);
     private native void setWindowClientTopLeftPointAndSize0(long window, int x, int y, int w, int h);
     private native void setWindowClientTopLeftPoint0(long window, int x, int y);
     private native void setAlwaysOnTop0(long window, boolean atop);
diff --git a/src/newt/native/MacWindow.m b/src/newt/native/MacWindow.m
index 1895b98a5..db4420b49 100644
--- a/src/newt/native/MacWindow.m
+++ b/src/newt/native/MacWindow.m
@@ -70,11 +70,18 @@ static void setWindowClientTopLeftPoint(NewtMacWindow* mWin, jint x, jint y) {
     [mWin invalidateCursorRectsForView: mView];
 }
 
-static void setWindowClientTopLeftPointAndSize(NewtMacWindow* mWin, jint x, jint y, jint width, jint height) {
-    NSSize sz = NSMakeSize(width, height);
-    NSPoint pS = [mWin newtAbsClientTLWinPos2AbsBLScreenPos: NSMakePoint(x, y) size: sz];
-    NSRect rect = { pS, sz };
-    [mWin setFrame: rect display:YES];
+static void setWindowClientTopLeftPointAndSize(NewtMacWindow* mWin, jint x, jint y, jint width, jint height, BOOL doDisplay) {
+    DBG_PRINT( "setWindowClientTopLeftPointAndSize.0 - window: %p %d/%d %dx%d\n", 
+        mWin, (int)x, (int)y, (int)width, (int)height);
+    NSSize clientSZ = NSMakeSize(width, height);
+    NSPoint pS = [mWin newtAbsClientTLWinPos2AbsBLScreenPos: NSMakePoint(x, y) size: clientSZ];
+    NSSize topSZ = [mWin newtClientSize2TLSize: clientSZ];
+    NSRect rect = { pS, topSZ };
+
+    DBG_PRINT( "setWindowClientTopLeftPointAndSize.X: %d/%d %dx%d\n", 
+        (int)rect.origin.x, (int)rect.origin.y, (int)rect.size.width, (int)rect.size.height);
+
+    [mWin setFrame: rect display:doDisplay];
 
     // -> display:YES
     // NSView* mView = [mWin contentView];
@@ -88,21 +95,20 @@ static int getRetainCount(NSObject * obj) {
 #endif
 
 static void changeContentView(JNIEnv *env, jobject javaWindowObject, NSView *pview, NewtMacWindow *win, NewtView *newView) {
-    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
     NSView* oldNSView = [win contentView];
-    NewtView* oldView = NULL;
+    NewtView* oldNewtView = NULL;
 #ifdef VERBOSE_ON
     int dbgIdx = 1;
 #endif
 
-    if( [oldNSView isMemberOfClass:[NewtView class]] ) {
-        oldView = (NewtView *) oldNSView;
+    if( [oldNSView isKindOfClass:[NewtView class]] ) {
+        oldNewtView = (NewtView *) oldNSView;
     }
 
     DBG_PRINT( "changeContentView.%d win %p, view (%p,%d (%d) -> %p,%d), parent view %p\n", 
-        dbgIdx++, win, oldNSView, getRetainCount(oldNSView), NULL!=oldView, newView, getRetainCount(newView), pview);
+        dbgIdx++, win, oldNSView, getRetainCount(oldNSView), NULL!=oldNewtView, newView, getRetainCount(newView), pview);
 
-    if(NULL!=oldNSView) {
+    if( NULL!=oldNSView ) {
 NS_DURING
         // Available >= 10.5 - Makes the menubar disapear
         BOOL iifs;
@@ -117,20 +123,20 @@ NS_DURING
 NS_HANDLER
 NS_ENDHANDLER
         DBG_PRINT( "changeContentView.%d win %p, view (%p,%d (%d) -> %p,%d)\n", 
-            dbgIdx++, win, oldNSView, getRetainCount(oldNSView), NULL!=oldView, newView, getRetainCount(newView));
+            dbgIdx++, win, oldNSView, getRetainCount(oldNSView), NULL!=oldNewtView, newView, getRetainCount(newView));
 
-        if( NULL != oldView ) {
-            jobject globJavaWindowObject = [oldView getJavaWindowObject];
+        if( NULL != oldNewtView ) {
+            jobject globJavaWindowObject = [oldNewtView getJavaWindowObject];
             (*env)->DeleteGlobalRef(env, globJavaWindowObject);
-            [oldView setJavaWindowObject: NULL];
-            [oldView setDestroyNotifySent: false];
+            [oldNewtView setJavaWindowObject: NULL];
+            [oldNewtView setDestroyNotifySent: false];
         }
         [oldNSView removeFromSuperviewWithoutNeedingDisplay];
     }
     DBG_PRINT( "changeContentView.%d win %p, view (%p,%d -> %p,%d), isHidden %d, isHiddenOrHasHiddenAncestor: %d\n", 
         dbgIdx++, win, oldNSView, getRetainCount(oldNSView), newView, getRetainCount(newView), [newView isHidden], [newView isHiddenOrHasHiddenAncestor]);
 
-    if(NULL!=newView) {
+    if( NULL!=newView ) {
         jobject globJavaWindowObject = (*env)->NewGlobalRef(env, javaWindowObject);
         [newView setJavaWindowObject: globJavaWindowObject];
         [newView setDestroyNotifySent: false];
@@ -163,12 +169,10 @@ NS_ENDHANDLER
         dbgIdx++, win, oldNSView, getRetainCount(oldNSView), newView, getRetainCount(newView), [newView isHidden], [newView isHiddenOrHasHiddenAncestor]);
 
     // make sure the insets are updated in the java object
-    [win updateInsets: env];
+    [win updateInsets: env jwin:javaWindowObject];
 
     DBG_PRINT( "changeContentView.X win %p, view (%p,%d -> %p,%d)\n", 
         win, oldNSView, getRetainCount(oldNSView), newView, getRetainCount(newView));
-
-    [pool release];
 }
 
 /*
@@ -565,29 +569,69 @@ JNIEXPORT jboolean JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_initIDs0
 }
 
 /**
- * Method is called on Main-Thread, hence no special invocation required inside method.
+ * Class:     jogamp_newt_driver_macosx_WindowDriver
+ * Method:    createView0
+ * Signature: (IIIIZI)J
+ */
+JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_createView0
+  (JNIEnv *env, jobject jthis, jint x, jint y, jint w, jint h, 
+   jboolean fullscreen, jint screen_idx)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+
+    DBG_PRINT( "createView0 - %p (this), %d/%d %dx%d, fs %d, screenidx %d (START)\n",
+        (void*)(intptr_t)jthis, (int)x, (int)y, (int)w, (int)h, (int)fullscreen, (int)screen_idx);
+
+    NSArray *screens = [NSScreen screens];
+    if(screen_idx<0) screen_idx=0;
+    if(screen_idx>=[screens count]) screen_idx=0;
+    NSScreen *myScreen = (NSScreen *) [screens objectAtIndex: screen_idx];
+    NSRect rectWin;
+
+    if (fullscreen) {
+        rectWin = [myScreen frame];
+        x = 0;
+        y = 0;
+        w = (jint) (rectWin.size.width);
+        h = (jint) (rectWin.size.height);
+    } else {
+        rectWin = NSMakeRect(x, y, w, h);
+    }
+
+    NSRect rectView = NSMakeRect(0, 0, w, h);
+    NewtView *myView = [[NewtView alloc] initWithFrame: rectView] ;
+    DBG_PRINT( "createView0.X.%d - new view: %p\n", myView);
+
+    [pool release];
+
+    return (jlong) ((intptr_t) myView);
+}
+
+/**
+ * Method creates a deferred un-initialized Window, hence no special invocation required inside method.
  *
  * Class:     jogamp_newt_driver_macosx_WindowDriver
  * Method:    createWindow0
- * Signature: (JIIIIZIIIJ)J
+ * Signature: (IIIIZIIIJ)J
  */
 JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_createWindow0
-  (JNIEnv *env, jobject jthis, jlong parent, jint x, jint y, jint w, jint h, jboolean opaque, jboolean fullscreen, jint styleMask, 
-   jint bufferingType, jint screen_idx, jlong jview)
+  (JNIEnv *env, jobject jthis, jint x, jint y, jint w, jint h, 
+   jboolean fullscreen, jint styleMask, jint bufferingType, jint screen_idx, jlong jview)
 {
     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
     NewtView* myView = (NewtView*) (intptr_t) jview ;
 
-    DBG_PRINT( "createWindow0 - %p (this), %p (parent), %d/%d %dx%d, opaque %d, fs %d, style %X, buffType %X, screenidx %d, view %p (START)\n",
-        (void*)(intptr_t)jthis, (void*)(intptr_t)parent, (int)x, (int)y, (int)w, (int)h, (int) opaque, (int)fullscreen, 
+    DBG_PRINT( "createWindow0 - %p (this), %d/%d %dx%d, fs %d, style %X, buffType %X, screenidx %d, view %p (START)\n",
+        (void*)(intptr_t)jthis, (int)x, (int)y, (int)w, (int)h, (int)fullscreen, 
         (int)styleMask, (int)bufferingType, (int)screen_idx, myView);
+    (void)myView;
 
     NSArray *screens = [NSScreen screens];
     if(screen_idx<0) screen_idx=0;
     if(screen_idx>=[screens count]) screen_idx=0;
     NSScreen *myScreen = (NSScreen *) [screens objectAtIndex: screen_idx];
-    NSRect rectWin;
 
+    NSRect rectWin;
     if (fullscreen) {
         styleMask = NSBorderlessWindowMask;
         rectWin = [myScreen frame];
@@ -603,9 +647,54 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_createWindow
     NewtMacWindow* myWindow = [[NewtMacWindow alloc] initWithContentRect: rectWin
                                                styleMask: (NSUInteger) styleMask
                                                backing: (NSBackingStoreType) bufferingType
-                                               defer: NO
+                                               defer: YES
                                                screen: myScreen
                                                isFullscreenWindow: fullscreen];
+
+    // DBG_PRINT( "createWindow0.1 - %p, isVisible %d\n", myWindow, [myWindow isVisible]);
+
+    DBG_PRINT( "createWindow0.X - %p, isVisible %d\n", myWindow, [myWindow isVisible]);
+
+    [pool release];
+
+    return (jlong) ((intptr_t) myWindow);
+}
+
+/**
+ * Method is called on Main-Thread, hence no special invocation required inside method.
+ *
+ * Class:     jogamp_newt_driver_macosx_WindowDriver
+ * Method:    initWindow0
+ * Signature: (JJIIIIZZZIIJ)V
+ */
+JNIEXPORT void JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_initWindow0
+  (JNIEnv *env, jobject jthis, jlong parent, jlong window, jint x, jint y, jint w, jint h, 
+   jboolean opaque, jboolean fullscreen, jboolean offscreen, jint screen_idx, jlong jview)
+{
+    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+    NewtMacWindow* myWindow = (NewtMacWindow*) ((intptr_t) window);
+    NewtView* myView = (NewtView*) (intptr_t) jview ;
+
+    DBG_PRINT( "initWindow0 - %p (this), %p (parent), %p (window), %d/%d %dx%d, opaque %d, fs %d, offscreen %d, screenidx %d, view %p (START)\n",
+        (void*)(intptr_t)jthis, (void*)(intptr_t)parent, myWindow, (int)x, (int)y, (int)w, (int)h, (int) opaque, (int)fullscreen, 
+        (int)offscreen, (int)screen_idx, myView);
+
+    NSArray *screens = [NSScreen screens];
+    if(screen_idx<0) screen_idx=0;
+    if(screen_idx>=[screens count]) screen_idx=0;
+    NSScreen *myScreen = (NSScreen *) [screens objectAtIndex: screen_idx];
+    NSRect rectWin;
+
+    if (fullscreen) {
+        rectWin = [myScreen frame];
+        x = 0;
+        y = 0;
+        w = (jint) (rectWin.size.width);
+        h = (jint) (rectWin.size.height);
+    } else {
+        rectWin = NSMakeRect(x, y, w, h);
+    }
+
     [myWindow setReleasedWhenClosed: YES]; // default
     [myWindow setPreservesContentDuringLiveResize: NO];
 
@@ -615,15 +704,15 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_createWindow
     if( nsParentObj != NULL && [nsParentObj isKindOfClass:[NSWindow class]] ) {
         parentWindow = (NSWindow*) nsParentObj;
         parentView = [parentWindow contentView];
-        DBG_PRINT( "createWindow0 - Parent is NSWindow : %p (win) -> %p (view) \n", parentWindow, parentView);
+        DBG_PRINT( "initWindow0 - Parent is NSWindow : %p (win) -> %p (view) \n", parentWindow, parentView);
     } else if( nsParentObj != NULL && [nsParentObj isKindOfClass:[NSView class]] ) {
         parentView = (NSView*) nsParentObj;
         parentWindow = [parentView window];
-        DBG_PRINT( "createWindow0 - Parent is NSView : %p -(view) > %p (win) \n", parentView, parentWindow);
+        DBG_PRINT( "initWindow0 - Parent is NSView : %p -(view) > %p (win) \n", parentView, parentWindow);
     } else {
-        DBG_PRINT( "createWindow0 - Parent is neither NSWindow nor NSView : %p\n", nsParentObj);
+        DBG_PRINT( "initWindow0 - Parent is neither NSWindow nor NSView : %p\n", nsParentObj);
     }
-    DBG_PRINT( "createWindow0 - is visible.1: %d\n", [myWindow isVisible]);
+    DBG_PRINT( "initWindow0 - is visible.1: %d\n", [myWindow isVisible]);
 
     // Remove animations for child windows
     if(NULL != parentWindow) {
@@ -641,11 +730,11 @@ NS_ENDHANDLER
 #endif
     if(opaque) {
         [myWindow setOpaque: YES];
-        DBG_PRINT( "createWindow0.%d\n", dbgIdx++);
+        DBG_PRINT( "initWindow0.%d\n", dbgIdx++);
         if (!fullscreen) {
             [myWindow setShowsResizeIndicator: YES];
         }
-        DBG_PRINT( "createWindow0.%d\n", dbgIdx++);
+        DBG_PRINT( "initWindow0.%d\n", dbgIdx++);
     } else {
         [myWindow setOpaque: NO];
         [myWindow setBackgroundColor: [NSColor clearColor]];
@@ -653,36 +742,25 @@ NS_ENDHANDLER
 
     // specify we want mouse-moved events
     [myWindow setAcceptsMouseMovedEvents:YES];
-    DBG_PRINT( "createWindow0.%d\n", dbgIdx++);
 
-    // Use given NewtView or allocate an NewtView if NULL
-    if(NULL == myView) {
-        NSRect rectView = NSMakeRect(0, 0, w, h);
-        myView = [[NewtView alloc] initWithFrame: rectView] ;
-        DBG_PRINT( "createWindow0.%d - use new view: %p,%d\n", dbgIdx++, myView, getRetainCount(myView));
-    } else {
-        DBG_PRINT( "createWindow0.%d - use given view: %p,%d\n", dbgIdx++, myView, getRetainCount(myView));
-    }
-
-    DBG_PRINT( "createWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
+    DBG_PRINT( "initWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
         dbgIdx++, myWindow, getRetainCount(myWindow), myView, getRetainCount(myView), [myWindow isVisible]);
 
     // Set the content view
     changeContentView(env, jthis, parentView, myWindow, myView);
 
-    DBG_PRINT( "createWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
+    DBG_PRINT( "initWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
         dbgIdx++, myWindow, getRetainCount(myWindow), myView, getRetainCount(myView), [myWindow isVisible]);
 
     if(NULL!=parentWindow) {
         [myWindow attachToParent: parentWindow];
     }
 
-    // Immediately re-position the window based on an upper-left coordinate system
-    setWindowClientTopLeftPoint(myWindow, x, y);
+    DBG_PRINT( "initWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
+        dbgIdx++, myWindow, getRetainCount(myWindow), myView, getRetainCount(myView), [myWindow isVisible]);
 
-    // force surface creation
-    [myView lockFocus];
-    [myView unlockFocus];
+    // Immediately re-position the window based on an upper-left coordinate system
+    setWindowClientTopLeftPointAndSize(myWindow, x, y, w, h, NO);
 
 NS_DURING
     // concurrent view rendering
@@ -696,12 +774,24 @@ NS_DURING
 NS_HANDLER
 NS_ENDHANDLER
 
+    DBG_PRINT( "initWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
+        dbgIdx++, myWindow, getRetainCount(myWindow), myView, getRetainCount(myView), [myWindow isVisible]);
+
     // visible on front
-    [myWindow orderFront: myWindow];
+    if( JNI_FALSE == offscreen ) {
+        [myWindow orderFront: myWindow];
+    }
+
+    DBG_PRINT( "initWindow0.%d - %p,%d view %p,%d, isVisible %d\n", 
+        dbgIdx++, myWindow, getRetainCount(myWindow), myView, getRetainCount(myView), [myWindow isVisible]);
+
+    // force surface creation
+    // [myView lockFocus];
+    // [myView unlockFocus];
 
 NS_DURING
     // Available >= 10.5 - Makes the menubar disapear
-    if(fullscreen) {
+    if( fullscreen ) {
         if ( [myView respondsToSelector:@selector(enterFullScreenMode:withOptions:)] ) {
             [myView enterFullScreenMode: myScreen withOptions:NULL];
         }
@@ -713,12 +803,10 @@ NS_ENDHANDLER
     // right mouse button down events
     [myView setNextResponder: myWindow];
 
-    DBG_PRINT( "createWindow0 - %p (this), %p (parent): new window: %p, view %p,%d (END)\n",
+    DBG_PRINT( "initWindow0.X - %p (this), %p (parent): new window: %p, view %p,%d\n",
         (void*)(intptr_t)jthis, (void*)(intptr_t)parent, myWindow, myView, getRetainCount(myView));
 
     [pool release];
-
-    return (jlong) ((intptr_t) myWindow);
 }
 
 /**
@@ -740,7 +828,7 @@ JNIEXPORT void JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_close0
     DBG_PRINT( "windowClose.0 - %p,%d, destroyNotifySent %d, view %p,%d, parent %p\n", 
         mWin, getRetainCount(mWin), destroyNotifySent, mView, getRetainCount(mView), pWin);
 
-    [mWin setUnrealized];
+    [mWin setRealized: NO];
 
     if(NULL!=mView) {
         // cleanup view
@@ -786,8 +874,7 @@ NS_ENDHANDLER
         [mWin release];
     }
 
-    DBG_PRINT( "windowClose.X - %p,%d, released %d, view %p,%d, parent %p\n", 
-        mWin, getRetainCount(mWin), !destroyNotifySent, mView, getRetainCount(mView), pWin);
+    DBG_PRINT( "windowClose.Xp\n");
 
     [pool release];
 }
@@ -795,16 +882,16 @@ NS_ENDHANDLER
 /*
  * Class:     Java_jogamp_newt_driver_macosx_WindowDriver
  * Method:    lockSurface0
- * Signature: (J)Z
+ * Signature: (JJ)Z
  */
 JNIEXPORT jboolean JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_lockSurface0
-  (JNIEnv *env, jclass clazz, jlong window)
+  (JNIEnv *env, jclass clazz, jlong window, jlong view)
 {
     NewtMacWindow *mWin = (NewtMacWindow*) ((intptr_t) window);
     if(NO == [mWin isRealized]) {
         return JNI_FALSE;
     }
-    NewtView * mView = (NewtView *) [mWin contentView];
+    NewtView * mView = (NewtView *) ((intptr_t) view);
     return [mView softLock] == YES ? JNI_TRUE : JNI_FALSE;
     /** deadlocks, since we render independent of focus
     return [mView lockFocusIfCanDraw] == YES ? JNI_TRUE : JNI_FALSE; */
@@ -813,14 +900,15 @@ JNIEXPORT jboolean JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_lockSurfa
 /*
  * Class:     Java_jogamp_newt_driver_macosx_WindowDriver
  * Method:    unlockSurface0
- * Signature: (J)V
+ * Signature: (JJ)Z
  */
-JNIEXPORT void JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_unlockSurface0
-  (JNIEnv *env, jclass clazz, jlong window)
+JNIEXPORT jboolean JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_unlockSurface0
+  (JNIEnv *env, jclass clazz, jlong window, jlong view)
 {
-    NewtMacWindow *mWin = (NewtMacWindow*) ((intptr_t) window);
-    NewtView * mView = (NewtView *) [mWin contentView];
-    [mView softUnlock];
+    // NewtMacWindow *mWin = (NewtMacWindow*) ((intptr_t) window);
+    (void) window;
+    NewtView * mView = (NewtView *) ((intptr_t) view);
+    return [mView softUnlock] == YES ? JNI_TRUE : JNI_FALSE;
     /** deadlocks, since we render independent of focus
     [mView unlockFocus]; */
 }
@@ -946,7 +1034,7 @@ JNIEXPORT void JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_setTitle0
 
 /*
  * Class:     jogamp_newt_driver_macosx_WindowDriver
- * Method:    contentView
+ * Method:    contentView0
  * Signature: (J)J
  */
 JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_contentView0
@@ -954,12 +1042,16 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_contentView0
 {
     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
     NSWindow* win = (NSWindow*) ((intptr_t) window);
+    NSView* nsView = [win contentView];
+    NewtView* newtView = NULL;
 
-    DBG_PRINT( "contentView0 - window: %p (START)\n", win);
+    if( [nsView isKindOfClass:[NewtView class]] ) {
+        newtView = (NewtView *) nsView;
+    }
 
-    jlong res = (jlong) ((intptr_t) [win contentView]);
+    DBG_PRINT( "contentView0 - window: %p, view: %p, newtView %p\n", win, nsView, newtView);
 
-    DBG_PRINT( "contentView0 - window: %p (END)\n", win);
+    jlong res = (jlong) ((intptr_t) nsView);
 
     [pool release];
     return res;
@@ -970,24 +1062,18 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_contentView0
  *
  * Class:     jogamp_newt_driver_macosx_WindowDriver
  * Method:    changeContentView
- * Signature: (J)J
+ * Signature: (J)V
  */
-JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_changeContentView0
+JNIEXPORT void JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_changeContentView0
   (JNIEnv *env, jobject jthis, jlong parentWindowOrView, jlong window, jlong jview)
 {
     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 
     NewtView* newView = (NewtView *) ((intptr_t) jview);
     NewtMacWindow* win = (NewtMacWindow*) ((intptr_t) window);
-    NSView* oldNSView = [win contentView];
-    NewtView* oldView = NULL;
 
-    if( [oldNSView isMemberOfClass:[NewtView class]] ) {
-        oldView = (NewtView *) oldNSView;
-    }
-
-    DBG_PRINT( "changeContentView0.0 -  win %p, view (%p,%d (%d) -> %p,%d)\n", 
-        win, oldNSView, getRetainCount(oldNSView), NULL!=oldView, newView, getRetainCount(newView));
+    DBG_PRINT( "changeContentView0.0 -  win %p, view (%p,%d)\n", 
+        win, newView, getRetainCount(newView));
 
     NSObject *nsParentObj = (NSObject*) ((intptr_t) parentWindowOrView);
     NSView* pView = NULL;
@@ -1002,12 +1088,9 @@ JNIEXPORT jlong JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_changeConten
 
     changeContentView(env, jthis, pView, win, newView);
 
-    DBG_PRINT( "changeContentView0.X -  win %p, view (%p,%d (%d) -> %p,%d)\n", 
-        win, oldNSView, getRetainCount(oldNSView), NULL!=oldView, newView, getRetainCount(newView));
+    DBG_PRINT( "changeContentView0.X\n");
 
     [pool release];
-
-    return (jlong) ((intptr_t) oldView);
 }
 
 /*
@@ -1023,7 +1106,7 @@ JNIEXPORT void JNICALL Java_jogamp_newt_driver_macosx_WindowDriver_setWindowClie
 
     DBG_PRINT( "setWindowClientTopLeftPointAndSize - window: %p (START)\n", mWin);
 
-    setWindowClientTopLeftPointAndSize(mWin, x, y, w, h);
+    setWindowClientTopLeftPointAndSize(mWin, x, y, w, h, YES);
 
     DBG_PRINT( "setWindowClientTopLeftPointAndSize - window: %p (END)\n", mWin);
 
diff --git a/src/newt/native/NewtMacWindow.h b/src/newt/native/NewtMacWindow.h
index 6d1bcca00..09f4a1fd3 100644
--- a/src/newt/native/NewtMacWindow.h
+++ b/src/newt/native/NewtMacWindow.h
@@ -47,6 +47,8 @@
     #define DBG_PRINT(...)
 #endif
 
+// #define DBG_LIFECYCLE 1
+
 @interface NewtView : NSView
 {
     jobject javaWindowObject;
@@ -56,16 +58,19 @@
     int jvmVersion;
 
     volatile BOOL destroyNotifySent;
-    volatile BOOL softLocked;
+    volatile int softLockCount;
     pthread_mutex_t softLockSync;
 
-    NSTrackingRectTag ptrTrackingTag;
+    volatile NSTrackingRectTag ptrTrackingTag;
     NSRect ptrRect;
     NSCursor * myCursor;
 }
 
 - (id)initWithFrame:(NSRect)frameRect;
+
+#ifdef DBG_LIFECYCLE
 - (void) release;
+#endif
 - (void) dealloc;
 
 /* Set during event dispatching cycle */
@@ -87,7 +92,7 @@
 - (BOOL) getDestroyNotifySent;
 
 - (BOOL) softLock;
-- (void) softUnlock;
+- (BOOL) softUnlock;
 
 - (BOOL) needsDisplay;
 - (void) displayIfNeeded;
@@ -125,18 +130,21 @@
        defer: (BOOL) deferCreation
        screen:(NSScreen *)screen
        isFullscreenWindow:(BOOL)isfs;
+#ifdef DBG_LIFECYCLE
 - (void) release;
+#endif
 - (void) dealloc;
-- (void) setUnrealized;
+- (void) setRealized: (BOOL)v;
 - (BOOL) isRealized;
 
-- (void) updateInsets: (JNIEnv*) env;
+- (void) updateInsets: (JNIEnv*) env jwin: (jobject) javaWin;
 - (void) attachToParent: (NSWindow*) parent;
 - (void) detachFromParent: (NSWindow*) parent;
 
 - (NSPoint) newtAbsClientTLWinPos2AbsBLScreenPos: (NSPoint) p;
 - (NSPoint) newtAbsClientTLWinPos2AbsBLScreenPos: (NSPoint) p size: (NSSize) nsz;
 - (NSPoint) newtRelClientTLWinPos2AbsBLScreenPos: (NSPoint) p;
+- (NSSize) newtClientSize2TLSize: (NSSize) nsz;
 - (NSPoint) getLocationOnScreen: (NSPoint) p;
 - (NSPoint) screenPos2NewtClientWinPos: (NSPoint) p;
 
diff --git a/src/newt/native/NewtMacWindow.m b/src/newt/native/NewtMacWindow.m
index 282c13fd3..d7b357349 100644
--- a/src/newt/native/NewtMacWindow.m
+++ b/src/newt/native/NewtMacWindow.m
@@ -113,7 +113,7 @@ static jmethodID windowRepaintID = NULL;
     jvmHandle = NULL;
     jvmVersion = 0;
     destroyNotifySent = NO;
-    softLocked = NO;
+    softLockCount = 0;
 
     pthread_mutexattr_t softLockSyncAttr;
     pthread_mutexattr_init(&softLockSyncAttr);
@@ -134,19 +134,21 @@ static jmethodID windowRepaintID = NULL;
     return res;
 }
 
+#ifdef DBG_LIFECYCLE
 - (void) release
 {
     DBG_PRINT("NewtView::release.0: %p (refcnt %d)\n", self, (int)[self retainCount]);
-#ifdef VERBOSE_ON
-    // NSLog(@"%@",[NSThread callStackSymbols]);
-#endif
     [super release];
 }
+#endif
 
 - (void) dealloc
 {
     DBG_PRINT("NewtView::dealloc.0: %p (refcnt %d), ptrTrackingTag %d\n", self, (int)[self retainCount], (int)ptrTrackingTag);
-    if(softLocked) {
+#ifdef DBG_LIFECYCLE
+    NSLog(@"%@",[NSThread callStackSymbols]);
+#endif
+    if( 0 < softLockCount ) {
         NSLog(@"NewtView::dealloc: softLock still hold @ dealloc!\n");
     }
     if(0 != ptrTrackingTag) {
@@ -155,9 +157,6 @@ static jmethodID windowRepaintID = NULL;
         ptrTrackingTag = 0;
     }
     pthread_mutex_destroy(&softLockSync);
-#ifdef VERBOSE_ON
-    //NSLog(@"%@",[NSThread callStackSymbols]);
-#endif
     DBG_PRINT("NewtView::dealloc.X: %p\n", self);
     [super dealloc];
 }
@@ -206,6 +205,7 @@ static jmethodID windowRepaintID = NULL;
     if(0 != ptrTrackingTag) {
         // [self removeCursorRect: ptrRect cursor: myCursor];
         [self removeTrackingRect: ptrTrackingTag];
+        ptrTrackingTag = 0;
     }
     ptrRect = [self bounds]; 
     // [self addCursorRect: ptrRect cursor: myCursor];
@@ -230,18 +230,27 @@ static jmethodID windowRepaintID = NULL;
 - (BOOL) softLock
 {
     // DBG_PRINT("*************** softLock.0: %p\n", (void*)pthread_self());
-    // NSLog(@"NewtView::softLock: %@",[NSThread callStackSymbols]);
-    pthread_mutex_lock(&softLockSync);
-    softLocked = YES;
+    int err;
+    if( 0 != ( err = pthread_mutex_lock(&softLockSync) ) ) {
+        NSLog(@"NewtView::softLock failed: errCode %d - %@", err, [NSThread callStackSymbols]);
+        return NO;
+    }
+    softLockCount++;
     // DBG_PRINT("*************** softLock.X: %p\n", (void*)pthread_self());
-    return softLocked;
+    return 0 < softLockCount;
 }
 
-- (void) softUnlock
+- (BOOL) softUnlock
 {
     // DBG_PRINT("*************** softUnlock: %p\n", (void*)pthread_self());
-    softLocked = NO;
-    pthread_mutex_unlock(&softLockSync);
+    softLockCount--;
+    int err;
+    if( 0 != ( err = pthread_mutex_unlock(&softLockSync) ) ) {
+        softLockCount++;
+        NSLog(@"NewtView::softUnlock failed: Not locked by current thread - errCode %d -  %@", err, [NSThread callStackSymbols]);
+        return NO;
+    }
+    return YES;
 }
 
 - (BOOL) needsDisplay
@@ -398,25 +407,26 @@ static jmethodID windowRepaintID = NULL;
     mouseInside = NO;
     cursorIsHidden = NO;
     realized = YES;
-    DBG_PRINT("NewtWindow::create: %p (refcnt %d)\n", res, (int)[res retainCount]);
+    DBG_PRINT("NewtWindow::create: %p, realized %d (refcnt %d)\n", res, realized, (int)[res retainCount]);
     return res;
 }
 
+#ifdef DBG_LIFECYCLE
 - (void) release
 {
     DBG_PRINT("NewtWindow::release.0: %p (refcnt %d)\n", self, (int)[self retainCount]);
-#ifdef VERBOSE_ON
     // NSLog(@"%@",[NSThread callStackSymbols]);
-#endif
     [super release];
 }
+#endif
 
 - (void) dealloc
 {
     DBG_PRINT("NewtWindow::dealloc.0: %p (refcnt %d)\n", self, (int)[self retainCount]);
-#ifdef VERBOSE_ON
-    // NSLog(@"%@",[NSThread callStackSymbols]);
+#ifdef DBG_LIFECYCLE
+    NSLog(@"%@",[NSThread callStackSymbols]);
 #endif
+
     NewtView* mView = (NewtView *)[self contentView];
     if( NULL != mView ) {
         [mView release];
@@ -425,9 +435,9 @@ static jmethodID windowRepaintID = NULL;
     DBG_PRINT("NewtWindow::dealloc.X: %p\n", self);
 }
 
-- (void) setUnrealized
+- (void) setRealized: (BOOL)v
 {
-    realized = NO;
+    realized = v;
 }
 
 - (BOOL) isRealized
@@ -435,18 +445,8 @@ static jmethodID windowRepaintID = NULL;
     return realized;
 }
 
-- (void) updateInsets: (JNIEnv*) env
+- (void) updateInsets: (JNIEnv*) env jwin: (jobject) javaWin
 {
-    NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
-        return;
-    }
-    NewtView* view = (NewtView *) nsview;
-    jobject javaWindowObject = [view getJavaWindowObject];
-    if (env==NULL || javaWindowObject == NULL) {
-        return;
-    }
-    
     NSRect frameRect = [self frame];
     NSRect contentRect = [self contentRectForFrameRect: frameRect];
 
@@ -460,7 +460,9 @@ static jmethodID windowRepaintID = NULL;
 
     DBG_PRINT( "updateInsets: [ l %d, r %d, t %d, b %d ]\n", cachedInsets[0], cachedInsets[1], cachedInsets[2], cachedInsets[3]);
 
-    (*env)->CallVoidMethod(env, javaWindowObject, insetsChangedID, JNI_FALSE, cachedInsets[0], cachedInsets[1], cachedInsets[2], cachedInsets[3]);
+    if( NULL != env && NULL != javaWin ) {
+        (*env)->CallVoidMethod(env, javaWin, insetsChangedID, JNI_FALSE, cachedInsets[0], cachedInsets[1], cachedInsets[2], cachedInsets[3]);
+    }
 }
 
 - (void) attachToParent: (NSWindow*) parent
@@ -502,11 +504,21 @@ static jmethodID windowRepaintID = NULL;
 {
     int totalHeight = nsz.height + cachedInsets[3]; // height + insets.bottom
 
+    DBG_PRINT( "newtAbsClientTLWinPos2AbsBLScreenPos: given %d/%d %dx%d, insets bottom %d -> totalHeight %d\n", 
+        (int)p.x, (int)p.y, (int)nsz.width, (int)nsz.height, cachedInsets[3], totalHeight);
+
     NSScreen* screen = [self screen];
     NSRect screenFrame = [screen frame];
 
-    return NSMakePoint(screenFrame.origin.x + p.x,
-                       screenFrame.origin.y + screenFrame.size.height - p.y - totalHeight);
+    DBG_PRINT( "newtAbsClientTLWinPos2AbsBLScreenPos: screen %d/%d %dx%d\n", 
+        (int)screenFrame.origin.x, (int)screenFrame.origin.y, (int)screenFrame.size.width, (int)screenFrame.size.height);
+
+    NSPoint r = NSMakePoint(screenFrame.origin.x + p.x,
+                            screenFrame.origin.y + screenFrame.size.height - p.y - totalHeight);
+
+    DBG_PRINT( "newtAbsClientTLWinPos2AbsBLScreenPos: result %d/%d\n", (int)r.x, (int)r.y); 
+
+    return r;
 }
 
 /**
@@ -524,6 +536,12 @@ static jmethodID windowRepaintID = NULL;
                        winFrame.origin.y + ( mViewFrame.size.height - p.y ) ); // y-flip in view
 }
 
+- (NSSize) newtClientSize2TLSize: (NSSize) nsz
+{
+    NSSize topSZ = { nsz.width, nsz.height + cachedInsets[2] + cachedInsets[3] }; // height + insets.top + insets.bottom
+    return topSZ;
+}
+
 /**
  * y-flips input / output
  * p rel client window position w/ top-left origin
@@ -646,7 +664,7 @@ static jint mods2JavaMods(NSUInteger mods)
 - (void) sendKeyEvent: (jshort) keyCode characters: (NSString*) chars modifiers: (NSUInteger)mods eventType: (jshort) evType
 {
     NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
+    if( ! [nsview isKindOfClass:[NewtView class]] ) {
         return;
     }
     NewtView* view = (NewtView *) nsview;
@@ -706,7 +724,7 @@ static jint mods2JavaMods(NSUInteger mods)
 - (void) sendMouseEvent: (NSEvent*) event eventType: (jshort) evType
 {
     NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
+    if( ! [nsview isKindOfClass:[NewtView class]] ) {
         return;
     }
     NewtView* view = (NewtView *) nsview;
@@ -783,7 +801,7 @@ static jint mods2JavaMods(NSUInteger mods)
 {
     DBG_PRINT( "focusChanged: gained %d\n", gained);
     NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
+    if( ! [nsview isKindOfClass:[NewtView class]] ) {
         return;
     }
     NewtView* view = (NewtView *) nsview;
@@ -981,43 +999,42 @@ static jint mods2JavaMods(NSUInteger mods)
 
 - (void)windowDidResize: (NSNotification*) notification
 {
-    NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
-        return;
-    }
-    NewtView* view = (NewtView *) nsview;
-    jobject javaWindowObject = [view getJavaWindowObject];
-    if (javaWindowObject == NULL) {
-        DBG_PRINT("windowDidResize: null javaWindowObject\n");
-        return;
-    }
+    JNIEnv* env = NULL;
+    jobject javaWindowObject = NULL;
     int shallBeDetached = 0;
-    JavaVM *jvmHandle = [view getJVMHandle];
-    JNIEnv* env = NewtCommon_GetJNIEnv(jvmHandle, [view getJVMVersion], &shallBeDetached);
-    if(NULL==env) {
-        DBG_PRINT("windowDidResize: null JNIEnv\n");
-        return;
+    JavaVM *jvmHandle = NULL;
+
+    NSView* nsview = [self contentView];
+    if( [nsview isKindOfClass:[NewtView class]] ) {
+        NewtView* view = (NewtView *) nsview;
+        javaWindowObject = [view getJavaWindowObject];
+        if (javaWindowObject != NULL) {
+            jvmHandle = [view getJVMHandle];
+            env = NewtCommon_GetJNIEnv(jvmHandle, [view getJVMVersion], &shallBeDetached);
+        }
     }
 
     // update insets on every window resize for lack of better hook place
-    [self updateInsets: env];
+    [self updateInsets: env jwin:javaWindowObject];
 
-    NSRect frameRect = [self frame];
-    NSRect contentRect = [self contentRectForFrameRect: frameRect];
+    if( NULL != env && NULL != javaWindowObject ) {
+        NSRect frameRect = [self frame];
+        NSRect contentRect = [self contentRectForFrameRect: frameRect];
 
-    (*env)->CallVoidMethod(env, javaWindowObject, sizeChangedID, JNI_FALSE,
-                           (jint) contentRect.size.width,
-                           (jint) contentRect.size.height, JNI_FALSE);
+        (*env)->CallVoidMethod(env, javaWindowObject, sizeChangedID, JNI_FALSE,
+                               (jint) contentRect.size.width,
+                               (jint) contentRect.size.height, JNI_FALSE);
 
-    if (shallBeDetached) {
-        (*jvmHandle)->DetachCurrentThread(jvmHandle);
+        if (shallBeDetached) {
+            (*jvmHandle)->DetachCurrentThread(jvmHandle);
+        }
     }
 }
 
 - (void)windowDidMove: (NSNotification*) notification
 {
     NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
+    if( ! [nsview isKindOfClass:[NewtView class]] ) {
         return;
     }
     NewtView* view = (NewtView *) nsview;
@@ -1061,7 +1078,7 @@ static jint mods2JavaMods(NSUInteger mods)
     [self cursorHide: NO];
 
     NSView* nsview = [self contentView];
-    if( ! [nsview isMemberOfClass:[NewtView class]] ) {
+    if( ! [nsview isKindOfClass:[NewtView class]] ) {
         return NO;
     }
     NewtView* view = (NewtView *) nsview;