1 files changed, 94 insertions, 0 deletions
diff --git a/sd/source/ui/slideshow/SlideShowRestarter.hxx b/sd/source/ui/slideshow/SlideShowRestarter.hxx
new file mode 100644
index 000000000000..d23758275a82
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+++ b/sd/source/ui/slideshow/SlideShowRestarter.hxx
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * 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.
+ *
+ ************************************************************************/
+
+#include "precompiled_sd.hxx"
+
+#include "slideshow.hxx"
+#include "ViewShellBase.hxx"
+#include <rtl/ref.hxx>
+#include <tools/link.hxx>
+#include <boost/enable_shared_from_this.hpp>
+
+namespace sd {
+
+/** This class is used when a display is removed or added to restart the
+    slide show.  This is necessary at least with DirectX because
+    deactivating a display invalidates DirectX resources.  Accessing those
+    leads to a crash.
+
+    During a restart a possibly installed presenter extension is given the
+    oportunity to show or hide depending on the number of available displays.
+*/
+class SlideShowRestarter
+    : public boost::enable_shared_from_this<SlideShowRestarter>
+{
+public:
+    /** Create a new SlideShowRestarter object.
+        @param rpSlideShow
+            The slide show is used to determine the current slide, which is
+            restored after the restart, and of course to stop and start the
+            slide show.
+        @param pViewShellBase
+            Used to get access to a slot dispatcher.
+    */
+    SlideShowRestarter (
+        const ::rtl::Reference<SlideShow>& rpSlideShow,
+        ViewShellBase* pViewShellBase);
+    virtual ~SlideShowRestarter (void);
+
+    /** Restarting the slide show is an asynchronous multi step process
+        which is started by calling this method.
+    */
+    void Restart (void);
+
+private:
+    sal_Int32 mnEventId;
+    ::rtl::Reference<SlideShow> mpSlideShow;
+    ViewShellBase* mpViewShellBase;
+    ::boost::shared_ptr<SlideShowRestarter> mpSelf;
+    sal_Int32 mnDisplayCount;
+    SfxDispatcher* mpDispatcher;
+    sal_Int32 mnCurrentSlideNumber;
+
+    /** The display count is used to determine whether the number of
+        displays has changed and thus whether restarting the slide show is
+        really necessary.
+    */
+    sal_Int32 GetDisplayCount (void);
+
+    DECL_LINK(EndPresentation, void*);
+
+    /** Restart the presentation on the slide last shown before the restart
+        was initiated.
+    */
+    void StartPresentation (void);
+};
+
+} // end of namespace sd
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */