diff -r b72c6db6890b -r 5dc02b23752f src/gui/widgets/qdockarealayout_p.h
--- a/src/gui/widgets/qdockarealayout_p.h	Wed Jun 23 19:07:03 2010 +0300
+++ b/src/gui/widgets/qdockarealayout_p.h	Tue Jul 06 15:10:48 2010 +0300
@@ -128,7 +128,7 @@
 {
 public:
     QDockAreaLayoutInfo();
-    QDockAreaLayoutInfo(int _sep, QInternal::DockPosition _dockPos, Qt::Orientation _o,
+    QDockAreaLayoutInfo(const int *_sep, QInternal::DockPosition _dockPos, Qt::Orientation _o,
                         int tbhape, QMainWindow *window);
 
     QSize minimumSize() const;
@@ -189,7 +189,7 @@
 
     QMainWindowLayout *mainWindowLayout() const;
 
-    int sep;
+    const int *sep;
     mutable QVector<QWidget*> separatorWidgets;
     QInternal::DockPosition dockPos;
     Qt::Orientation o;
@@ -208,11 +208,9 @@
     QRect tabContentRect() const;
     bool tabbed;
     QTabBar *tabBar;
-    QSize tabBarMin, tabBarHint;
     int tabBarShape;
-    bool tabBarVisible;
 
-    void updateTabBar() const;
+    bool updateTabBar() const;
     void setTabBarShape(int shape);
     QSize tabBarMinimumSize() const;
     QSize tabBarSizeHint() const;
@@ -300,6 +298,7 @@
     QSet<QTabBar*> usedTabBars() const;
     QSet<QWidget*> usedSeparatorWidgets() const;
 #endif //QT_NO_TABBAR
+    void styleChangedEvent();
 };
 
 QT_END_NAMESPACE