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#Copyright (C) 2008, OLPC
#
# 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
import gobject
import pango
import pygtk
from gettext import gettext as _
from sugar.graphics import style
from jarabe.controlpanel.sectionview import SectionView
from jarabe.controlpanel.inlinealert import InlineAlert
_Small = _('8')
_Default =_('10')
_Large = _('24')
_seconds_label = _('%s ')
_MAX_DELAY = 1
class Font(SectionView):
def __init__(self, model, alerts):
SectionView.__init__(self)
self._model = model
self._font_size_sid = 0
self._font_size_change_is_valid = True
self._font_size_change_handler = None
self._makechange = True
self.restart_alerts = alerts
self.set_border_width(style.DEFAULT_SPACING * 2)
self.set_spacing(style.DEFAULT_SPACING)
self._group = gtk.SizeGroup(gtk.SIZE_GROUP_HORIZONTAL)
separator = gtk.HSeparator()
self.pack_start(separator, expand=False)
separator.show()
label_activation = gtk.Label(_('Font'))
label_activation.set_alignment(0, 0)
self.pack_start(label_activation, expand=False)
label_activation.show()
self._box_sliders = gtk.VBox()
self._box_sliders.set_border_width(style.DEFAULT_SPACING)
self._box_sliders.set_spacing(style.DEFAULT_SPACING * 2)
self._font_size_slider = None
self._font_size_alert = None
self._setup_font()
self.pack_start(self._box_sliders, expand=False)
self._box_sliders.show()
self.box_prevw = gtk.HBox()
self.box_prevw.set_border_width(style.DEFAULT_SPACING)
self.box_prevw.set_spacing(style.DEFAULT_SPACING * 2)
self._setup_preview()
self.pack_start(self.box_prevw, expand =False)
self.box_prevw.show()
self.setup()
def _setup_font(self):
"""Here we create a HBox and in that we pack both the font size label and the scale with the marks as small, default and large """
box_size = gtk.HBox(spacing=style.DEFAULT_SPACING)
label_size = gtk.Label(_('Font size'))
self._group.add_widget(label_size)
label_size.set_alignment(1, 0.35)
label_size.modify_fg(gtk.STATE_NORMAL,
style.COLOR_SELECTION_GREY.get_gdk_color())
box_size.pack_start(label_size, expand=False)
self._group.add_widget(label_size)
label_size.show()
adj = gtk.Adjustment(value=1, lower=8, upper=24, step_incr=1, page_incr=100, page_size=0)
self._font_size_slider = gtk.HScale(adj)
self._font_size_slider.set_digits(0)
self._font_size_slider.connect('value_changed', self._font_size_delay_format_cb,gtk.UPDATE_CONTINUOUS )
self._font_size_slider.connect('value_changed', self.cb_font_size,gtk.UPDATE_CONTINUOUS )
self._font_size_slider.add_mark(0.0,gtk.POS_BOTTOM,_('Small'))
self._font_size_slider.add_mark(10.0,gtk.POS_BOTTOM,_('Default'))
self._font_size_slider.add_mark(24.0,gtk.POS_BOTTOM,_('Large'))
box_size.pack_start(self._font_size_slider)
self._font_size_slider.show()
self._box_sliders.pack_start(box_size, expand =False)
box_size.show()
self._font_size_alert = InlineAlert()
label_size_error = gtk.Label()
self._group.add_widget(label_size_error)
delay_alert_box = gtk.HBox(spacing=style.DEFAULT_SPACING)
delay_alert_box.pack_start(label_size_error, expand=False)
label_size_error.show()
delay_alert_box.pack_start(self._font_size_alert, expand=False)
self._box_sliders.pack_start(delay_alert_box,expand=False)
delay_alert_box.show()
if 'font_size' in self.restart_alerts:
self._font_size_alert.props.msg = self.restart_msg
self._font_size_alert.show()
def _setup_preview(self):
""" Here we create another HBox within which we have font preview label and the text """
box_preview=gtk.HBox(spacing=style.DEFAULT_SPACING)
label_activation = gtk.Label(_('Font preview:'))
label_activation.set_alignment(1, 0.35)
label_activation.modify_fg(gtk.STATE_NORMAL,style.COLOR_SELECTION_GREY.get_gdk_color())
box_preview.pack_start(label_activation, expand=False)
self._group.add_widget(label_activation)
label_activation.show()
self.label_font_activation = gtk.Label(_('The quick brown fox jumps over the lazy dog'))
self.label_font_activation.set_alignment(1.5, 0.35)
box_preview.pack_start(self.label_font_activation)
self.label_font_activation.show()
self.box_prevw.pack_start(box_preview, expand=False)
box_preview.show()
def setup(self):
""" now we get the value of the slider with a restriction that it has to be integer and connect the handler to the _font_size_changed_cb(which will show the values on the scale at a point on the scale"""
self._font_size_slider.set_value(self._model.get_font_size())
self._font_size_change_is_valid=True
self.needs_restart=False
self._font_size_change_handler = self._font_size_slider.connect('value-changed', self._font_size_changed_cb)
def undo(self):
self._font_size_slider.disconnect(self._font_size_change_handler)
self._model.undo()
self._font_size_alert.hide()
def _validate(self):
if self._font_size_change_is_valid:
self.props.is_valid =True
else:
self.props.is_valid = False
def cb_font_size(self,label_font_activation,pos):
self.label_font_activation.set_value_pos(pos)
def _font_size_changed_cb(self, scale ,data=None):
""" It will remove the event of restart if the value remains same and if different value then _font_size_sid will be reset"""
if self._font_size_sid:
gobject.source_remove(self._font_size_sid)
self._font_size_sid = gobject.timeout_add(self._APPLY_TIMEOUT,self._font_size_timeout_cb, scale)
def _font_size_timeout_cb(self,scale):
"""text will remain unchanged if the scale value and the model integer value remains same else it will show the restart message"""
self._font_size_sid = 0
if scale.get_value() == self._model.get_font_size():
return
try:
self._model.set_font_size(scale.get_value())
except ValueError, detail:
self._font_size_alert.props.msg = detail
self._font_size_change_is_valid = False
else:
self._font_size_alert.props.msg = self.restart_msg
self._font_size_change_is_valid = True
self.needs_restart=True
self.restart_alerts.append('font_size')
self._validate()
self._font_size_alert.show()
return False
def _font_size_delay_format_cb(self, scale, value):
""" It's value will be returned to setup(self) to place the slider position on the value returned by this"""
if value == _MAX_DELAY:
return _large
elif value == 0:
return _small
elif value == 500:
return _default
else:
return _seconds_label % (value / _MAX_DELAY)
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