1
// $Id: scroller.hpp 3059 2007-09-02 03:48:52Z grumbel $
3
// Pingus - A free Lemmings clone
4
// Copyright (C) 2000 Ingo Ruhnke <grumbel@gmx.de>
6
// This program is free software; you can redistribute it and/or
7
// modify it under the terms of the GNU General Public License
8
// as published by the Free Software Foundation; either version 2
9
// of the License, or (at your option) any later version.
11
// This program is distributed in the hope that it will be useful,
12
// but WITHOUT ANY WARRANTY; without even the implied warranty of
13
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14
// GNU General Public License for more details.
16
// You should have received a copy of the GNU General Public License
17
// along with this program; if not, write to the Free Software
18
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20
#ifndef HEADER_PINGUS_INPUT_SCROLLER_HXX
21
#define HEADER_PINGUS_INPUT_SCROLLER_HXX
23
#include "../pingus.hpp"
27
/// abstract base class defining the scroller interface
31
virtual ~Scroller() { }
33
/// returns the scroll delta in X direction
34
virtual const float& get_x_delta() const =0;
36
/// returns the scroll delta in Y direction
37
virtual const float& get_y_delta() const =0;
39
/// writes the X/Y scroll delta into it's parameters
40
virtual void get_delta(float&, float&) const =0;
42
virtual void update(float) =0;
45
Scroller(const Scroller&);
46
Scroller& operator= (const Scroller&);