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diff --git a/include/svx/orienthelper.hxx b/include/svx/orienthelper.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef SVX_ORIENTHELPER_HXX
+#define SVX_ORIENTHELPER_HXX
+
+#include <memory>
+#include <vcl/window.hxx>
+#include <sfx2/itemconnect.hxx>
+#include "svx/svxdllapi.h"
+
+class NumericField;
+class CheckBox;
+
+namespace svx {
+
+class DialControl;
+
+// ============================================================================
+
+struct OrientationHelper_Impl;
+
+/** A helper class that manages a DialControl and a "Stacked text" check box.
+
+    This helper remembers a DialControl for entering a rotation angle, and a
+    check box for stacked text, that enables/disables other controls dependent
+    on its state.
+
+    It is possible to register more controls that have to be enabled/disabled
+    together with this helper object (optionally dependent on the stacked text
+    check box), using the function AddDependentWindow(). All registered windows
+    are handled on a call of Enable(), or Show(), or on changing the state of
+    the "Stacked text" check box.
+
+    Note: The member function SetStackedState() should be used instead of
+    direct modifications of the "Stacked text" check box. Otherwise the update
+    mechanism of registered controls will not work.
+ */
+class SVX_DLLPUBLIC OrientationHelper
+{
+public:
+    /** @param rNfRotation  A numeric field that will be connected to the DialControl. */
+    explicit            OrientationHelper(
+                            DialControl& rCtrlDial,
+                            NumericField& rNfRotation,
+                            CheckBox& rCbStacked );
+
+    virtual             ~OrientationHelper();
+
+    /** Registers the passed window to be enabled/disabled on call of Enable().
+        @param eDisableIfStacked
+        STATE_CHECK:    Window always disabled, if stacked text is turned on.
+        STATE_NOCHECK:  Window always disabled, if stacked text is turned off.
+        STATE_DONTKNOW: Window will be enabled/disabled independent from stacked text. */
+    void                AddDependentWindow( Window& rWindow, TriState eDisableIfStacked = STATE_DONTKNOW );
+
+    /** Enables or disables the dial control and all dependent windows. */
+    void                Enable( bool bEnable = true );
+    /** Disables the dial control and all dependent windows. */
+    inline void         Disable() { Enable( false ); }
+
+    /** Shows or hides the dial control and all dependent windows. */
+    void                Show( bool bShow = true );
+    /** Hides the dial control and all dependent windows. */
+    inline void         Hide() { Show( false ); }
+
+    /** Sets the "stacked" check box to the passed state and updates dependent controls. */
+    void                SetStackedState( TriState eState );
+    /** Returns the state of the "stacked" check box. */
+    TriState            GetStackedState() const;
+
+    /** Enables/disables the "don't know" state of the "Stacked text" check box. */
+    void                EnableStackedTriState( bool bEnable = true );
+
+private:
+    std::auto_ptr< OrientationHelper_Impl > mpImpl;
+};
+
+// ============================================================================
+
+/** Wrapper for usage of the stacked attribute of an OrientationHelper in item connections. */
+class SVX_DLLPUBLIC OrientStackedWrapper : public sfx::SingleControlWrapper< OrientationHelper, bool >
+{
+public:
+    explicit            OrientStackedWrapper( OrientationHelper& rOrientHlp );
+
+    virtual bool        IsControlDontKnow() const;
+    virtual void        SetControlDontKnow( bool bSet );
+
+    virtual bool        GetControlValue() const;
+    virtual void        SetControlValue( bool bValue );
+};
+
+// ----------------------------------------------------------------------------
+
+/** An item<->control connection for the stacked attribute of an OrientationHelper. */
+typedef sfx::ItemControlConnection< sfx::BoolItemWrapper, OrientStackedWrapper > OrientStackedConnection;
+
+// ============================================================================
+
+} // namespace
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */