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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_LISTENER_HXX
+#define _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_LISTENER_HXX
+
+#include <sal/types.h>
+#include <tools/gen.hxx>
+
+
+namespace accessibility {
+
+class IAccessibleViewForwarder;
+
+/** <p>The purpose of this interface is to notify a user of an
+    IAccessibleViewForwarder when that view forwarder changes its
+    properties.  Such a change may be one of the following:
+    <ul>
+    <li>Change of the coordinate transformation.</li>
+    <li>Change of the visible area (which in turn results in a change of the
+    coordinate transformation.</li>
+    <li>Change of the validity state of the view forwarder.</li>
+*/
+class IAccessibleViewForwarderListener
+{
+public:
+    /** Enumeration of the different change types.
+    */
+    enum ChangeType {TRANSFORMATION, VISIBLE_AREA, STATE};
+
+    /** This method is called to indicate a change of the specified view
+        forwarder.
+        @param aChangeType
+            The type of the change.  TRANSFORMATION indicates a change of
+            the coordinate transformation with a constant visible area.  If
+            the visible area changes, just use VISIBLE_AREA.  This changes
+            the transformation implicitly.  The value STATE indicates a
+            change of the validity state.  Check the IsValid method of the
+            view forwarder before doing further calls.
+        @param pViewForwarder
+            The modified view forwarder.  It is specified just in case that
+            there is more than one view forwarder in use at the same time.
+    */
+    virtual void ViewForwarderChanged (ChangeType aChangeType,
+        const IAccessibleViewForwarder* pViewForwarder) = 0;
+};
+
+} // end of namespace accessibility
+
+#endif