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/*
* active_screen.cc -- 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
*/
#include "screen.h"
#include "picture_data.h"
#include "picture.h"
#include "active_screen.h"
namespace ePiX {
screen_broker::screen_broker()
{
m_screens.push_front(&the_picture().the_canvas);
}
screen* screen_broker::active() const
{
return *(m_screens.begin());
}
void screen_broker::push(screen& scr)
{
m_screens.push_front(&scr);
}
screen* screen_broker::pop()
{
std::list<screen*>::const_iterator sp(m_screens.begin());
screen* val(*sp);
if (++sp != m_screens.end())
m_screens.pop_front();
return val;
}
// global functions
screen_broker& the_screen_stack()
{
static screen_broker* the_screen_broker(new screen_broker());
return *the_screen_broker;
}
screen* active_screen()
{
return the_screen_stack().active();
}
} // end of namespace
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