xbmc/input/InertialScrollingHandler.h

   1 #pragma once
   2
   3 /*
   4  *      Copyright (C) 2011-2013 Team XBMC
   5  *      http://xbmc.org
   6  *
   7  *  This Program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2, or (at your option)
  10  *  any later version.
  11  *
  12  *  This Program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with XBMC; see the file COPYING.  If not, see
  19  *  <http://www.gnu.org/licenses/>.
  20  *
  21  */
  22
  23 #include "guilib/Geometry.h"
  24
  25 class CApplication;
  26 class CAction;
  27
  28 class CInertialScrollingHandler
  29 {
  30   friend class CApplication;
  31   public:
  32     CInertialScrollingHandler();
  33
  34     bool IsScrolling(){return m_bScrolling;}
  35
  36   private:
  37     bool CheckForInertialScrolling(const CAction* action);
  38     bool ProcessInertialScroll(float frameTime);
  39
  40     //-------------------------------------------vars for inertial scrolling animation with gestures
  41     bool          m_bScrolling;        //flag indicating that we currently do the inertial scrolling emulation
  42     bool          m_bAborting;         //flag indicating an abort of scrolling
  43     CPoint        m_iFlickVelocity;
  44     CPoint        m_iLastGesturePoint;
  45     CPoint        m_inertialDeacceleration;
  46     unsigned int  m_inertialStartTime;
  47 };