//  $Id: inverted_scroller.cpp 3059 2007-09-02 03:48:52Z grumbel $
//
//  Pingus - A free Lemmings clone
//  Copyright (C) 2000 Ingo Ruhnke <grumbel@gmx.de>
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 2
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#include "inverted_scroller.hpp"

namespace Input {
namespace Scrollers {

InvertedScroller::InvertedScroller (Scroller* scroller_, bool invert_x_, bool invert_y_)
  : scroller(scroller_),
    invert_x(invert_x_),
    invert_y(invert_y_)
{
}

InvertedScroller::~InvertedScroller ()
{
  delete scroller;
}

const float&
InvertedScroller::get_x_delta () const
{
  return x_pos;
}

const float&
InvertedScroller::get_y_delta () const
{
  return y_pos;
}

void
InvertedScroller::get_delta (float& x, float& y) const
{
  x = x_pos;
  y = y_pos;
}

void
InvertedScroller::update (float delta)
{
  scroller->update(delta);

  (invert_x) ? x_pos = -(scroller->get_x_delta()) : x_pos = scroller->get_x_delta();
  (invert_y) ? y_pos = -(scroller->get_y_delta()) : x_pos = scroller->get_y_delta();
}

} // namespace Scroller
} // namespace Input

/* EOF */