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/*
* active_screen.h -- ePiX screen_broker class
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.11
* Last Change: August 15, 2007
*/
/*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
* Andrew D. Hwang <ahwang -at- holycross -dot- edu>
* Department of Mathematics and Computer Science
* College of the Holy Cross
* Worcester, MA, 01610-2395, USA
*/
/*
* ePiX 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.
*
* ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* A screen_broker is a simple stack of screen*, permitting client code
* to activate a screen then restore the state later. No attempt is made
* to handle concurrent threads, but the global "deactivate" function
* in picture.h prints a warning if its argument is not active.
*/
#ifndef EPIX_ACTIVE_SCREEN
#define EPIX_ACTIVE_SCREEN
#include <list>
namespace ePiX {
class screen;
class screen_broker {
public:
screen_broker();
// no need for destructor; we don't manage resources
screen* active() const;
void push(screen&);
screen* pop();
private:
std::list<screen*> m_screens;
// forbid copying
screen_broker(const screen_broker&);
screen_broker& operator= (const screen_broker&);
};
screen_broker& the_screen_stack();
screen* active_screen();
} // end of namespace
#endif /* EPIX_ACTIVE_SCREEN */
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