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

@@ -428,13 +428,10 @@
         }
     }
 
     @Override // PlatformWindow
     public void dispose() {
-        if (owner != null) {
-            CWrapper.NSWindow.removeChildWindow(owner.getNSWindowPtr(), getNSWindowPtr());
-        }
         contentView.dispose();
         nativeDispose(getNSWindowPtr());
         CPlatformWindow.super.dispose();
     }
 

@@ -525,30 +522,10 @@
 
     @Override // PlatformWindow
     public void setVisible(boolean visible) {
         final long nsWindowPtr = getNSWindowPtr();
 
-        // Process parent-child relationship when hiding
-        final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
-        if (!visible) {
-            // Unparent my children
-            for (Window w : target.getOwnedWindows()) {
-                WindowPeer p = acc.getPeer(w);
-                if (p instanceof LWWindowPeer) {
-                    CPlatformWindow pw = (CPlatformWindow)((LWWindowPeer)p).getPlatformWindow();
-                    if (pw != null && pw.isVisible()) {
-                        CWrapper.NSWindow.removeChildWindow(nsWindowPtr, pw.getNSWindowPtr());
-                    }
-                }
-            }
-
-            // Unparent myself
-            if (owner != null && owner.isVisible()) {
-                CWrapper.NSWindow.removeChildWindow(owner.getNSWindowPtr(), nsWindowPtr);
-            }
-        }
-
         // Configure stuff
         updateIconImages();
         updateFocusabilityForAutoRequestFocus(false);
 
         boolean wasMaximized = isMaximized();

@@ -617,24 +594,26 @@
 
         // Configure stuff #2
         updateFocusabilityForAutoRequestFocus(true);
 
         // Manage parent-child relationship when showing
+        final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
+
         if (visible) {
-            // Add myself as a child
+            // Order myself above my parent
             if (owner != null && owner.isVisible()) {
-                CWrapper.NSWindow.addChildWindow(owner.getNSWindowPtr(), nsWindowPtr, CWrapper.NSWindow.NSWindowAbove);
+                CWrapper.NSWindow.orderWindow(nsWindowPtr, CWrapper.NSWindow.NSWindowAbove, owner.getNSWindowPtr());
                 applyWindowLevel(target);
             }
 
-            // Add my own children to myself
+            // Order my own children above myself
             for (Window w : target.getOwnedWindows()) {
                 final Object p = acc.getPeer(w);
                 if (p instanceof LWWindowPeer) {
                     CPlatformWindow pw = (CPlatformWindow)((LWWindowPeer)p).getPlatformWindow();
                     if (pw != null && pw.isVisible()) {
-                        CWrapper.NSWindow.addChildWindow(nsWindowPtr, pw.getNSWindowPtr(), CWrapper.NSWindow.NSWindowAbove);
+                        CWrapper.NSWindow.orderWindow(pw.getNSWindowPtr(), CWrapper.NSWindow.NSWindowAbove, nsWindowPtr);
                         pw.applyWindowLevel(w);
                     }
                 }
             }
         }

@@ -1056,12 +1035,12 @@
             owner.orderAboveSiblings();
 
             // Order the window to front of the stack of child windows
             final long nsWindowSelfPtr = getNSWindowPtr();
             final long nsWindowOwnerPtr = owner.getNSWindowPtr();
-            CWrapper.NSWindow.removeChildWindow(nsWindowOwnerPtr, nsWindowSelfPtr);
-            CWrapper.NSWindow.addChildWindow(nsWindowOwnerPtr, nsWindowSelfPtr, CWrapper.NSWindow.NSWindowAbove);
+            CWrapper.NSWindow.orderFront(nsWindowOwnerPtr);
+            CWrapper.NSWindow.orderWindow(nsWindowSelfPtr, CWrapper.NSWindow.NSWindowAbove, nsWindowOwnerPtr);
         }
 
         applyWindowLevel(target);
     }