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# Copyright 2007 Benjamin M. Schwartz
# Copyright 2011 Walter Bender
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import gtk
from gettext import gettext as _
from sugar.graphics.combobox import ComboBox
from sugar.graphics.toolcombobox import ToolComboBox
METERS = 0
CENTIMETERS = 1
INCHES = 2
FEET = 3
YARDS = 4
CUSTOM = 5
UNITS = [_('meters'), _('centimeters'),
# TRANS: English units of measure
_('inches'), _('feet'), _('yards'),
_('custom units')]
UNIT_DICTIONARY = {METERS: (_('meters'), 1.0),
CENTIMETERS: (_('centimeters'), 100.0),
INCHES: (_('inches'), 39.37),
FEET: (_('feet'), 3.28),
YARDS: (_('yards'), 1.09),
CUSTOM: (_('custom units'), None)}
def _label_factory(label, toolbar):
''' Factory for adding a label to a toolbar '''
my_label = gtk.Label(label)
my_label.set_line_wrap(True)
my_label.show()
_toolitem = gtk.ToolItem()
_toolitem.add(my_label)
toolbar.insert(_toolitem, -1)
_toolitem.show()
return my_label
def _combo_factory(combo_array, default, tooltip, callback, toolbar):
'''Factory for making a toolbar combo box'''
my_combo = ComboBox()
if hasattr(my_combo, 'set_tooltip_text'):
my_combo.set_tooltip_text(tooltip)
my_combo.connect('changed', callback)
for i, s in enumerate(combo_array):
my_combo.append_item(i, s, None)
toolbar.insert(ToolComboBox(my_combo), -1)
my_combo.set_active(default)
return my_combo
class SmootToolbar(gtk.Toolbar):
''' Defines a toolbar for specifying units of measure '''
def __init__(self, parent):
gtk.Toolbar.__init__(self)
self._parent = parent
self._unit_name = _('meters')
# Conversion factor between meters and custom units
self._unit_scale = 1.0
label = _label_factory(_('Choose a unit of measure:'), self)
label.show()
self._unit_combo = _combo_factory(UNITS, METERS, _('select units'),
self._unit_combo_cb, self)
self._unit_combo.show()
self._factor_label = _label_factory(' ', self)
self._factor_label.show()
def get_name(self):
return self._unit_name
def set_name(self, name):
self._unit_name = name
if hasattr(self._parent, 'fr'):
self._parent.fr.set_label(
_('Measured distance in %s') % (self._unit_name))
if name == _('meters'):
self._factor_label.set_label(' ')
else:
self._factor_label.set_label(_('%(20.2)f %(1)s per meter') % (
self._unit_scale, name))
def get_scale(self):
return self._unit_scale
def set_scale(self, scale):
if scale is None:
if self._parent.current_distance > 0:
self._unit_scale = (1.0 / self._parent.current_distance)
else:
self._unit_scale = 1.0
else:
self._unit_scale = scale
def _unit_combo_cb(self, arg=None):
''' Read value of predefined conversion factors from combo box '''
try:
self.set_scale(
UNIT_DICTIONARY[self._unit_combo.get_active()][1])
self.set_name(
UNIT_DICTIONARY[self._unit_combo.get_active()][0])
except KeyError:
pass
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