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# Copyright (C) 2008 Jimmy Do <jimmydo@users.sourceforge.net>
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from gettext import gettext as _
import math
import gobject
import gtk
class DurationChooser(gtk.VBox):
__gsignals__ = {'duration-changed': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ())}
MAX_HOURS = 48
MAX_MINUTES = 999
MAX_SECONDS = 999
def __init__(self, size_group):
gtk.VBox.__init__(self, False, 6)
self._hours_spin = self._add_row(_('_Hours:'),
size_group,
DurationChooser.MAX_HOURS)
self._minutes_spin = self._add_row(_('_Minutes:'),
size_group,
DurationChooser.MAX_MINUTES)
self._seconds_spin = self._add_row(_('_Seconds:'),
size_group,
DurationChooser.MAX_SECONDS)
def get_duration(self):
"""Return numerical representations of the values in the spinbuttons.
This method does not just call get_value_as_int() on each spinbutton because
get_value_as_int() does not return the most up-to-date value if the user is
in the middle of editing the value in a spinbutton. Instead, it actually
returns the value previously "confirmed" for the spinbutton (for example,
by moving focus to another widget).
Example: User starts with all spinboxes set to 0. He types 5 in 'Minutes' and
immediately uses the keyboard to activate the 'Save as Preset' button. Because
the user never moved focus out of the spinbutton, get_value_as_int() will report
the previous value of 0, and the saved preset will not have the expected duration
of 5 minutes.
If a particular spinbutton is empty or contains a non-float value, then this method
will report its value as zero.
Returns a tuple in this format: (hours, minutes, seconds)
"""
hours_str = self._hours_spin.props.text
minutes_str = self._minutes_spin.props.text
seconds_str = self._seconds_spin.props.text
hours = 0
minutes = 0
seconds = 0
try:
hours = float(hours_str)
except TypeError:
pass
except ValueError:
pass
try:
minutes = float(minutes_str)
except TypeError:
pass
except ValueError:
pass
try:
seconds = float(seconds_str)
except TypeError:
pass
except ValueError:
pass
minutes_fraction = minutes - int(minutes)
hours_fraction = hours - int(hours)
# Distribute overflow from seconds to minutes to hours.
if seconds > 59:
minutes = math.floor(seconds / 60)
seconds = seconds % 60
if minutes > 59:
hours = math.floor(minutes / 60)
minutes = minutes % 60
if hours > DurationChooser.MAX_HOURS:
hours = DurationChooser.MAX_HOURS
# Distribute fractions.
if hours_fraction > 0:
minutes = int(hours_fraction * 60)
if minutes_fraction > 0:
seconds = int(minutes_fraction * 60)
return (int(hours), int(minutes), int(seconds))
def set_duration(self, hours, minutes, seconds):
self._hours_spin.set_value(hours)
self._minutes_spin.set_value(minutes)
self._seconds_spin.set_value(seconds)
def normalize_fields(self):
(hours, minutes, seconds) = self.get_duration()
self._hours_spin.set_value(hours)
self._minutes_spin.set_value(minutes)
self._seconds_spin.set_value(seconds)
def clear(self):
self._hours_spin.set_value(0)
self._minutes_spin.set_value(0)
self._seconds_spin.set_value(0)
def focus_hours(self):
self._hours_spin.grab_focus()
def _add_row(self, row_label_str, size_group, max_spin_val):
row_hbox = gtk.HBox(False, 6)
label = gtk.Label(row_label_str)
label.set_property('xalign', 0.0)
label.set_property('use-underline', True)
size_group.add_widget(label)
spin_adj = gtk.Adjustment(0, 0, max_spin_val, 1, 1, 0)
spin_button = gtk.SpinButton(spin_adj, 1.0, 0)
spin_button.props.activates_default = True
spin_button.props.numeric = False
spin_button.props.update_policy = gtk.UPDATE_IF_VALID
label.set_mnemonic_widget(spin_button)
row_hbox.pack_start(label, False, False, 0)
row_hbox.pack_start(spin_button, True, True, 0)
self.pack_start(row_hbox, False, False, 0)
spin_button.connect('changed', self._on_spin_button_val_changed)
spin_button.connect('focus-out-event', self._on_spin_button_focus_out)
spin_button.connect('activate', self._on_spin_button_activate)
label.show()
spin_button.show()
row_hbox.show()
return spin_button
def _on_spin_button_val_changed(self, spin_button):
self.emit('duration-changed')
def _on_spin_button_focus_out(self, spin_button, event):
self.normalize_fields()
def _on_spin_button_activate(self, entry):
self.normalize_fields()
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