# Copyright (C) 2007, Red Hat, Inc.
# Copyright (C) 2009, Tomeu Vizoso
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.

import os
import logging

def _compute_zoom_factor():
    if os.environ.has_key('SUGAR_SCALING'):
        try:
            scaling = int(os.environ['SUGAR_SCALING'])
            return scaling / 100.0
        except ValueError:
            logging.error('Invalid SUGAR_SCALING.')

    return 1.0

def zoom(units):
    return int(ZOOM_FACTOR * units)

ZOOM_FACTOR = _compute_zoom_factor()

GRID_CELL_SIZE = zoom(75)

STANDARD_ICON_SIZE = zoom(55)
SMALL_ICON_SIZE = zoom(55 * 0.5)
MEDIUM_ICON_SIZE = zoom(55 * 1.5)
LARGE_ICON_SIZE = zoom(55 * 2.0)
XLARGE_ICON_SIZE = zoom(55 * 2.75)