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diff --git a/slideshow/source/inc/event.hxx b/slideshow/source/inc/event.hxx
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+++ b/slideshow/source/inc/event.hxx
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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 INCLUDED_SLIDESHOW_EVENT_HXX
+#define INCLUDED_SLIDESHOW_EVENT_HXX
+
+#include "disposable.hxx"
+#include "debug.hxx"
+#include <rtl/ustring.hxx>
+#include <boost/shared_ptr.hpp>
+#include <vector>
+
+namespace slideshow {
+namespace internal {
+
+/** Definition of Event interface
+ */
+class Event : public Disposable
+{
+public:
+#if OSL_DEBUG_LEVEL > 1
+    Event (const ::rtl::OUString& rsDescription) : msDescription(rsDescription) {};
+#endif
+
+    /** Execute the event.
+
+        @return true, if event was successfully executed.
+    */
+    virtual bool fire() = 0;
+
+    /** Query whether this event is still charged, i.e. able
+        to fire.
+
+        Inactive events are ignored by the normal event
+        containers (EventQueue, UserEventQueue etc.), and no
+        explicit fire() is called upon them.
+
+        @return true, if this event has already been fired.
+    */
+    virtual bool isCharged() const = 0;
+
+    /** Query the activation time instant this event shall be
+        fired, if it was inserted at instant nCurrentTime into
+        the queue.
+
+        @param nCurrentTime
+        The time from which the activation time is to be
+        calculated from.
+
+        @return the time instant in seconds, on which this
+        event is to be fired.
+    */
+    virtual double getActivationTime( double nCurrentTime ) const = 0;
+
+#if OSL_DEBUG_LEVEL > 1
+    ::rtl::OUString GetDescription (void) const { return msDescription; }
+
+private:
+    const ::rtl::OUString msDescription;
+#endif
+};
+
+typedef ::boost::shared_ptr< Event > EventSharedPtr;
+typedef ::std::vector< EventSharedPtr > VectorOfEvents;
+
+} // namespace internal
+} // namespace presentation
+
+#endif /* INCLUDED_SLIDESHOW_EVENT_HXX */