--- old/modules/graphics/src/main/native-glass/gtk/GlassWindow.cpp	2014-11-14 18:51:48.652864633 +0300
+++ new/modules/graphics/src/main/native-glass/gtk/GlassWindow.cpp	2014-11-14 18:51:48.528864630 +0300
@@ -55,6 +55,22 @@
     return NORMAL;
 }
 
+static GdkWMFunction glass_mask_to_wm_function(jint mask) {
+    int func = GDK_FUNC_RESIZE | GDK_FUNC_MOVE;
+
+    if (mask & com_sun_glass_ui_gtk_GtkWindow_CLOSABLE) {
+        func |= GDK_FUNC_CLOSE;
+    }
+    if (mask & com_sun_glass_ui_gtk_GtkWindow_MAXIMIZABLE) {
+        func |= GDK_FUNC_MAXIMIZE;
+    }
+    if (mask & com_sun_glass_ui_gtk_GtkWindow_MINIMIZABLE) {
+        func |= GDK_FUNC_MINIMIZE;
+    }
+
+    return (GdkWMFunction) func;
+}
+
 extern "C" {
 
 /*
@@ -71,7 +87,9 @@
             (WindowContext*)JLONG_TO_PTR(owner),
             screen,
             glass_mask_to_window_frame_type(mask),
-            glass_mask_to_window_type(mask));
+            glass_mask_to_window_type(mask),
+            glass_mask_to_wm_function(mask)
+            );
 
     return PTR_TO_JLONG(ctx);
 }
--- old/modules/graphics/src/main/native-glass/gtk/glass_window.cpp	2014-11-14 18:51:49.036864643 +0300
+++ new/modules/graphics/src/main/native-glass/gtk/glass_window.cpp	2014-11-14 18:51:48.912864639 +0300
@@ -626,7 +626,7 @@
 
 
 WindowContextTop::WindowContextTop(jobject _jwindow, WindowContext* _owner, long _screen,
-        WindowFrameType _frame_type, WindowType type) :
+        WindowFrameType _frame_type, WindowType type, GdkWMFunction wmf) :
             WindowContextBase(),
             screen(_screen),
             frame_type(_frame_type),
@@ -685,6 +685,10 @@
 
     gdk_window_register_dnd(gdk_window);
 
+    if (wmf) {
+        gdk_window_set_functions(gdk_window, wmf);
+    }
+
     if (frame_type == TITLED) {
         request_frame_extents();
     }
@@ -1750,7 +1754,8 @@
         return;
     }
 
-    full_screen_window = new WindowContextTop(jwindow, NULL, 0L, UNTITLED, NORMAL);
+    full_screen_window = new WindowContextTop(jwindow, NULL, 0L, UNTITLED,
+                                                NORMAL, (GdkWMFunction) 0);
     int x, y, w, h;
     gdk_window_get_origin(gdk_window, &x, &y);
     gdk_window_get_geometry(gdk_window, NULL, NULL, &w, &h, NULL);
--- old/modules/graphics/src/main/native-glass/gtk/glass_window.h	2014-11-14 18:51:49.444864653 +0300
+++ new/modules/graphics/src/main/native-glass/gtk/glass_window.h	2014-11-14 18:51:49.316864650 +0300
@@ -382,7 +382,7 @@
     bool size_assigned;
     bool on_top;
 public:
-    WindowContextTop(jobject, WindowContext*, long, WindowFrameType, WindowType);
+    WindowContextTop(jobject, WindowContext*, long, WindowFrameType, WindowType, GdkWMFunction);
     void process_map();
     void process_property_notify(GdkEventProperty*);
     void process_configure(GdkEventConfigure*);