Source code for timelinelib.canvas.data.era
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Rickard Lindberg, Roger Lindberg
#
# This file is part of Timeline.
#
# Timeline 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 3 of the License, or
# (at your option) any later version.
#
# Timeline 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 Timeline. If not, see <http://www.gnu.org/licenses/>.
from timelinelib.canvas.data.base import ItemBase
from timelinelib.canvas.data.immutable import ImmutableEra
from timelinelib.canvas.data.item import TimelineItem
DEFAULT_ERA_COLOR = (200, 200, 200)
[docs]class Era(ItemBase, TimelineItem):
"""
A clearly defined period of time of arbitrary but well-defined length.
An Era is indicated in a timeline, by setting the background color
to the Era color for the Era time period. The Era name is also
drawn on the timeline within the Era time period.
"""
[docs] def __init__(self, db=None, id_=None, immutable_value=ImmutableEra()):
ItemBase.__init__(self, db, id_, immutable_value)
[docs] def save(self):
with self._db.transaction("Save era") as t:
t.save_era(self._immutable_value, self.ensure_id())
return self
[docs] def delete(self):
with self._db.transaction("Delete era") as t:
t.delete_era(self.id)
self.id = None
[docs] def __eq__(self, other):
return (isinstance(other, Era) and
self.get_id() == other.get_id() and
self.get_time_period() == other.get_time_period() and
self.get_name() == other.get_name() and
self.get_color() == other.get_color())
[docs] def __ne__(self, other):
return not (self == other)
[docs] def __gt__(self, other):
return self.get_start_time() > other.get_start_time()
[docs] def __lt__(self, other):
return self.get_start_time() < other.get_start_time()
[docs] def ends_today(self):
return self._immutable_value.ends_today
[docs] def set_ends_today(self, value):
self._immutable_value = self._immutable_value.update(ends_today=value)
_ends_today = property(ends_today, set_ends_today)
[docs] def update(self, start_time, end_time, name, color=DEFAULT_ERA_COLOR):
""" """
self.update_period(start_time, end_time)
self.name = name.strip()
self.color = color
return self
[docs] def set_name(self, name):
self._immutable_value = self._immutable_value.update(name=name.strip())
return self
[docs] def get_name(self):
return self._immutable_value.name
name = property(get_name, set_name)
[docs] def set_color(self, color):
self._immutable_value = self._immutable_value.update(color=color)
return self
[docs] def get_color(self):
return self._immutable_value.color
color = property(get_color, set_color)
[docs] def overlapping(self, era):
""" """
if era.get_start_time() >= self.get_end_time():
return 0
if era.get_start_time() == self.get_start_time():
if era.get_end_time() == self.get_end_time():
return 4
if era.get_end_time() > self.get_end_time():
return 2
else:
return 3
if era.get_end_time() == self.get_end_time():
return 5
if era.get_end_time() > self.get_end_time():
return 1
return 6