4 // Copyright (C) 2006 Matthias Braun <matze@braunis.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.
19 #ifndef __SCREEN_HPP__
20 #define __SCREEN_HPP__
25 * Abstract base class for code the MainLoop runs exclusively and full-screen.
27 * Examples of Screens are: The TitleScreen, a WorldMap, a level's
28 * GameSession, a TextScroller, ...
37 * gets called before this screen gets activated (which is at least once
38 * before the first draw or update call
42 /** gets called when the current screen is temporarily suspended */
47 * gets called once per frame. The screen should draw itself in this function.
48 * State changes should not be done in this function, but rather in update
50 virtual void draw(DrawingContext& context) = 0;
53 * gets called for once (per logical) frame. Screens should do their state
54 * updates and logic here
56 virtual void update(float elapsed_time) = 0;