Desktop/sourceforge/geometria/src/kernel/geo_line.cpp

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/*
This file is part of geometria.

geometria 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.

geometria 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 geometria; if not, write to the Free Software 
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

(c) Philipp Moritz, 2006
*/

#include "geo_line.hpp"


geo_line::geo_line(const std::string& name, boost::shared_ptr<line_algorithm> algo, 
                                   boost::shared_ptr<line_formater_strategy> paint_strategy)
:       m_parent_algorithm(algo), 
        m_paint_strategy(paint_strategy),
        geo_element(name)
{
        m_parent_algorithm->register_observer(this);
        m_parent_algorithm->update();
}

geo_line::~geo_line(void)
{
        m_parent_algorithm->unregister_observer(this);
}

std::ostream& geo_line::put(std::ostream& s)
{
        return s << "Line: " << "T = " << get_line().get_t() 
                << "; M = " << get_line().get_m() << std::endl;
}

line geo_line::get_line() const
{
        return m_parent_algorithm->get_line();
}

void geo_line::change_parent_algo(boost::shared_ptr<line_algorithm> new_algo)
{
        m_parent_algorithm = new_algo;
        m_parent_algorithm->update();
        notice_all_observers();
}

void geo_line::update()
{
        notice_all_observers();
}

void geo_line::draw(boost::shared_ptr<drawing_context> context)
{
        m_paint_strategy->draw(get_line(), context);
}

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