LUMIERA.clone/src/gui/util/rectangle.cpp

/*
  rectangle.cpp  -  Implements utility functions for GDK rects

  Copyright (C)         Lumiera.org
    2008,               Joel Holdsworth <joel@airwebreathe.org.uk>

  This program 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.

  This program 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 this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/

#include "rectangle.hpp"
#include <algorithm>

using namespace std;

namespace gui {
namespace util {

bool
pt_in_rect(const Gdk::Point &point, const Gdk::Rectangle &rect)
{
  return (point.get_x() >= rect.get_x() &&
    point.get_x() < rect.get_x() + rect.get_width() &&
    point.get_y() >= rect.get_y() &&
    point.get_y() < rect.get_y() + rect.get_height());
}

bool
rects_overlap(const Gdk::Rectangle &a, const Gdk::Rectangle &b)
{ 
  return (
    max(a.get_x(), b.get_x()) <
    min(a.get_x() + a.get_width(), b.get_x() + b.get_width())
    &&
    max(a.get_y(), b.get_y()) <
    min(a.get_y() + a.get_height(), b.get_y() + b.get_height())
    );
}

}   // namespace util
}   // namespace gui