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# Copyright (C) 2008 Jimmy Do <jimmydo@users.sourceforge.net>
# Copyright (C) 2010 Kenny Meyer <knny.myer@gmail.com>
#
# 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
import datetime
import time
import gobject
class Timer(gobject.GObject):
(STATE_IDLE, STATE_RUNNING, STATE_PAUSED, STATE_FINISHED) = xrange(4)
__gsignals__ = {'time-changed':
(gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ()),
'state-changed':
(gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, ())}
def __init__(self):
gobject.GObject.__init__(self)
self._state = Timer.STATE_IDLE
self._duration_seconds = 0
self._remaining_seconds = 0
self._end_time = 0
self._name = ''
self._command = ''
self._next_timer = ''
self._auto_start = False
def set_duration(self, seconds):
"""Set the duration of the timer in seconds."""
assert self._state == Timer.STATE_IDLE
self._duration_seconds = seconds
def get_duration(self):
"""Return the duration of the timer in seconds."""
return self._duration_seconds
def set_name(self, name):
"""Set the name of the timer."""
assert self._state == Timer.STATE_IDLE
self._name = name
def get_name(self):
"""Return the name of the timer."""
return self._name
def set_command(self, command):
"""Set the command to run of the timer."""
assert self._state == Timer.STATE_IDLE
self._command = command
def get_command(self):
"""Return the name of the command of the timer."""
return self._command
def set_next_timer(self, timer):
"""Set the next timeer of the timer."""
assert self._state == Timer.STATE_IDLE
self._next_timer = timer
def get_next_timer(self):
"""Get the next timer of the timer."""
return self._next_timer
def set_auto_start(self, auto_start):
"""Set the auto-start value of the timer."""
assert self._state == Timer.STATE_IDLE
self._auto_start = auto_start
def get_auto_start(self):
"""Get the auto-start value."""
return self._auto_start
def start(self):
"""Start or resume the timer.
This method should only be called when the timer is IDLE or PAUSED.
"""
assert self._state == Timer.STATE_IDLE or self._state == Timer.STATE_PAUSED
self._timer_transition_to_state(Timer.STATE_RUNNING)
def stop(self):
"""Pause the timer.
This method should only be called when the timer is RUNNING.
"""
assert self._state == Timer.STATE_RUNNING
self._timer_transition_to_state(Timer.STATE_PAUSED)
def reset(self):
"""Reset the timer.
This method should only be called when the timer is not IDLE.
"""
assert self._state != Timer.STATE_IDLE
self._timer_transition_to_state(Timer.STATE_IDLE)
def get_state(self):
"""Return the current state."""
return self._state
def get_remaining_time(self):
"""Return the remaining time in seconds."""
return min(self._duration_seconds, max(0, self._remaining_seconds))
def get_end_time(self):
"""Return a datetime object representing the end time.
This method should only be called when the timer is RUNNING or FINISHED.
"""
assert self._state == Timer.STATE_RUNNING or self._state == Timer.STATE_FINISHED
return datetime.datetime.fromtimestamp(self._end_time)
def _timer_set_state(self, state):
self._state = state
self.emit('state-changed')
def _timer_transition_to_state(self, dest_state):
cur_time = int(time.time())
if dest_state == Timer.STATE_IDLE:
self._end_time = 0
self._set_remaining_time(self._duration_seconds)
elif dest_state == Timer.STATE_RUNNING:
assert self._duration_seconds >= 0
if self._state == Timer.STATE_IDLE:
self._end_time = cur_time + self._duration_seconds
self._set_remaining_time(self._duration_seconds)
elif self._state == Timer.STATE_PAUSED:
self._end_time = cur_time + self._remaining_seconds
gobject.timeout_add(500, self._on_timeout)
elif dest_state == Timer.STATE_PAUSED:
self._set_remaining_time(self._end_time - cur_time)
self._end_time = 0
elif dest_state == Timer.STATE_FINISHED:
pass
else:
assert False
self._timer_set_state(dest_state)
def _on_timeout(self):
if self._state != Timer.STATE_RUNNING:
return False # remove timeout source
new_remaining = self._end_time - int(time.time())
if self._remaining_seconds != new_remaining:
self._set_remaining_time(new_remaining)
if self._remaining_seconds < 0:
self._timer_transition_to_state(Timer.STATE_FINISHED)
return False # remove timeout source
return True # keep timeout source
def _set_remaining_time(self, new_remaining):
self._remaining_seconds = new_remaining
self.emit('time-changed')
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