1 files changed, 56 insertions, 0 deletions
diff --git a/xbmc/input/InertialScrollingHandler.h b/xbmc/input/InertialScrollingHandler.h
new file mode 100644
index 0000000..cff8516
--- /dev/null
+++ b/xbmc/input/InertialScrollingHandler.h
@@ -0,0 +1,56 @@
+/*
+ *  Copyright (C) 2011-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "utils/Geometry.h"
+#include "utils/Vector.h"
+
+#include <deque>
+
+class CApplication;
+class CAction;
+
+class CInertialScrollingHandler
+{
+  friend class CApplication;
+
+public:
+  CInertialScrollingHandler();
+
+  bool IsScrolling() { return m_bScrolling; }
+
+private:
+  bool CheckForInertialScrolling(const CAction* action);
+  bool ProcessInertialScroll(float frameTime);
+
+  /*
+   * vars for inertial scrolling animation with gestures
+   */
+
+  // flag indicating that we currently do the inertial scrolling emulation
+  bool m_bScrolling = false;
+
+  // flag indicating an abort of scrolling
+  bool m_bAborting = false;
+
+  CVector m_iFlickVelocity;
+
+  struct PanPoint
+  {
+    unsigned int time;
+    CVector velocity;
+    PanPoint(unsigned int time, CVector velocity) : time(time), velocity(velocity) {}
+    unsigned int TimeElapsed() const;
+  };
+  std::deque<PanPoint> m_panPoints;
+  CPoint m_iLastGesturePoint;
+  CVector m_inertialDeacceleration;
+  unsigned int m_inertialStartTime = 0;
+  float m_timeToZero = 0.0f;
+};