modules/javafx.graphics/src/main/native-glass/mac/GlassWindow.m

@@ -512,13 +512,13 @@
         window->isResizable = NO;
         window->isDecorated = (jStyleMask&com_sun_glass_ui_Window_TITLED) != 0;
         /* 10.7 full screen window support */
         if ([NSWindow instancesRespondToSelector:@selector(toggleFullScreen:)]) {
             NSWindowCollectionBehavior behavior = [window->nsWindow collectionBehavior];
-            if (window->isDecorated && !window->owner)
+            if ((jStyleMask&com_sun_glass_ui_Window_POPUP) == 0 && !window->owner)
             {
-                // Only titled ownerless windows should have the Full Screen Toggle control
+                // Only ownerless windows should have the Full Screen Toggle control
                 behavior |= (1 << 7) /* NSWindowCollectionBehaviorFullScreenPrimary */;
             }
             else
             {
                 // Other windows are only allowed to be shown together with a primary