1 files changed, 77 insertions, 0 deletions
diff --git a/sd/source/ui/inc/tools/AsynchronousCall.hxx b/sd/source/ui/inc/tools/AsynchronousCall.hxx
new file mode 100644
index 000000000..fa4c18020
--- /dev/null
+++ b/sd/source/ui/inc/tools/AsynchronousCall.hxx
@@ -0,0 +1,77 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <vcl/timer.hxx>
+
+#include <memory>
+#include <functional>
+
+namespace sd::tools
+{
+/** Store a function object and execute it asynchronous.
+
+    The features of this class are:
+    a) It provides a wrapper around a VCL Timer so that generic function
+    objects can be used.
+    b) When more than one function objects are posted to be executed later
+    then the pending ones are erased and only the last one will actually be
+    executed.
+
+    Use this class like this:
+    aInstanceOfAsynchronousCall.Post(
+        ::std::bind(
+            ::std::mem_fun(&DrawViewShell::SwitchPage),
+            pDrawViewShell,
+            11));
+*/
+class AsynchronousCall
+{
+public:
+    /** Create a new asynchronous call.  Each object of this class processes
+        one (semantical) type of call.
+    */
+    AsynchronousCall();
+
+    ~AsynchronousCall();
+
+    /** Post a function object that is to be executed asynchronously.  When
+        this method is called while the current function object has not been
+        executed then the latter is destroyed and only the given function
+        object will be executed.
+        @param rFunction
+            The function object that may be called asynchronously in the
+            near future.
+    */
+    typedef ::std::function<void()> AsynchronousFunction;
+    void Post(const AsynchronousFunction& rFunction);
+
+private:
+    Timer maTimer;
+    /** The function object that will be executed when the TimerCallback
+        function is called the next time.  This pointer may be NULL.
+    */
+    ::std::unique_ptr<AsynchronousFunction> mpFunction;
+    DECL_LINK(TimerCallback, Timer*, void);
+};
+
+} // end of namespace ::sd::tools
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */