1 files changed, 127 insertions, 0 deletions
diff --git a/sd/source/ui/presenter/CanvasUpdateRequester.cxx b/sd/source/ui/presenter/CanvasUpdateRequester.cxx
new file mode 100644
index 000000000000..4435c265e989
--- /dev/null
+++ b/sd/source/ui/presenter/CanvasUpdateRequester.cxx
@@ -0,0 +1,127 @@
+/*************************************************************************
+ *
+ * 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 "CanvasUpdateRequester.hxx"
+#include <vcl/svapp.hxx>
+#include <com/sun/star/lang/XComponent.hpp>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using ::rtl::OUString;
+
+namespace sd { namespace presenter {
+
+//===== CanvasUpdateRequester::Deleter ========================================
+
+class CanvasUpdateRequester::Deleter
+{
+public:
+    void operator() (CanvasUpdateRequester* pObject) { delete pObject; }
+};
+
+
+
+
+//===== CanvasUpdateRequester =================================================
+
+CanvasUpdateRequester::RequesterMap CanvasUpdateRequester::maRequesterMap;
+
+::boost::shared_ptr<CanvasUpdateRequester> CanvasUpdateRequester::Instance (
+    const Reference<rendering::XSpriteCanvas>& rxSharedCanvas)
+{
+    RequesterMap::const_iterator iRequester;
+    for (iRequester=maRequesterMap.begin(); iRequester!=maRequesterMap.end(); ++iRequester)
+    {
+        if (iRequester->first == rxSharedCanvas)
+            return iRequester->second;
+    }
+
+    // No requester for the given canvas found.  Create a new one.
+    ::boost::shared_ptr<CanvasUpdateRequester> pRequester (
+        new CanvasUpdateRequester(rxSharedCanvas), Deleter());
+    maRequesterMap.push_back(RequesterMap::value_type(rxSharedCanvas,pRequester));
+    return pRequester;
+}
+
+
+
+
+CanvasUpdateRequester::CanvasUpdateRequester (
+    const Reference<rendering::XSpriteCanvas>& rxCanvas)
+    : mxCanvas(rxCanvas),
+      mnUserEventId(0),
+      mbUpdateFlag(sal_False)
+{
+    Reference<lang::XComponent> xComponent (mxCanvas, UNO_QUERY);
+    if (xComponent.is())
+    {
+        //xComponent->addEventListener(this);
+    }
+}
+
+
+
+
+CanvasUpdateRequester::~CanvasUpdateRequester (void)
+{
+    if (mnUserEventId != 0)
+        Application::RemoveUserEvent(mnUserEventId);
+}
+
+
+
+
+void CanvasUpdateRequester::RequestUpdate (const sal_Bool bUpdateAll)
+{
+    if (mnUserEventId == 0)
+    {
+        mbUpdateFlag = bUpdateAll;
+        mnUserEventId = Application::PostUserEvent(LINK(this, CanvasUpdateRequester, Callback));
+    }
+    else
+    {
+        mbUpdateFlag |= bUpdateAll;
+    }
+}
+
+
+
+IMPL_LINK(CanvasUpdateRequester, Callback, void*, EMPTYARG)
+{
+    mnUserEventId = 0;
+    if (mxCanvas.is())
+    {
+        mxCanvas->updateScreen(mbUpdateFlag);
+        mbUpdateFlag = sal_False;
+    }
+    return 0;
+}
+
+
+} } // end of namespace ::sd::presenter