1 files changed, 79 insertions, 0 deletions
diff --git a/slideshow/source/engine/activities/simplecontinuousactivitybase.hxx b/slideshow/source/engine/activities/simplecontinuousactivitybase.hxx
new file mode 100644
index 000000000..fb4f74605
--- /dev/null
+++ b/slideshow/source/engine/activities/simplecontinuousactivitybase.hxx
@@ -0,0 +1,79 @@
+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
+
+#include "activitybase.hxx"
+#include <canvas/elapsedtime.hxx>
+
+namespace slideshow::internal
+    {
+        /** Simple, continuous animation.
+
+            This class implements a simple, continuous animation
+            without considering repeats or acceleration on the
+            perform call. Only useful as a base class, you
+            probably want to use ContinuousActivityBase.
+        */
+        class SimpleContinuousActivityBase : public ActivityBase
+        {
+        public:
+            explicit SimpleContinuousActivityBase( const ActivityParameters& rParms );
+
+            virtual double calcTimeLag() const override;
+            virtual bool perform() override;
+
+        protected:
+            /** Hook for derived classes
+
+                This method will be called from perform().
+
+                @param nSimpleTime
+                Simple animation time, without repeat,
+                acceleration or deceleration applied. This value
+                is always in the [0,1] range, the repeat is
+                accounted for with the nRepeatCount parameter.
+
+                @param nRepeatCount
+                Number of full repeats already performed
+            */
+            virtual void simplePerform( double nSimpleTime, sal_uInt32 nRepeatCount ) const = 0;
+
+            virtual void startAnimation() override;
+
+        private:
+            /// Time elapsed since activity started
+            ::canvas::tools::ElapsedTime    maTimer;
+
+            /// Simple duration of activity
+            const double                    mnMinSimpleDuration;
+
+            /// Minimal number of frames to show (see ActivityParameters)
+            const sal_uInt32                mnMinNumberOfFrames;
+
+            /// Actual number of frames shown until now.
+            sal_uInt32                      mnCurrPerformCalls;
+        };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */