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+/* -*- 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_CONTINUOUSKEYTIMEACTIVITYBASE_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_CONTINUOUSKEYTIMEACTIVITYBASE_HXX
+
+#include "simplecontinuousactivitybase.hxx"
+
+#include <basegfx/utils/keystoplerp.hxx>
+
+
+namespace slideshow::internal
+ {
+ /** Interpolated, key-times animation.
+
+ This class implements an interpolated key-times
+ animation, with continuous time.
+ */
+ class ContinuousKeyTimeActivityBase : public SimpleContinuousActivityBase
+ {
+ public:
+ explicit ContinuousKeyTimeActivityBase( const ActivityParameters& rParms );
+
+ using SimpleContinuousActivityBase::perform;
+
+ /** Hook for derived classes
+
+ This method will be called from perform(), already
+ equipped with the modified time (nMinNumberOfFrames, repeat,
+ acceleration and deceleration taken into account).
+
+ @param nIndex
+ Current index of the key times/key values.
+
+ @param nFractionalIndex
+ Fractional value from the [0,1] range, specifying
+ the position between nIndex and nIndex+1.
+
+ @param nRepeatCount
+ Number of full repeats already performed
+ */
+ virtual void perform( sal_uInt32 nIndex,
+ double nFractionalIndex,
+ sal_uInt32 nRepeatCount ) const = 0;
+
+ /// From SimpleContinuousActivityBase class
+ virtual void simplePerform( double nSimpleTime,
+ sal_uInt32 nRepeatCount ) const override;
+
+ private:
+ const ::basegfx::utils::KeyStopLerp maLerper;
+ };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_CONTINUOUSKEYTIMEACTIVITYBASE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */