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# -*- encoding: utf-8 -*-
#
#
# Copyright (C) 2004-2006 André Wobst <wobsta@pyx-project.org>
#
# This file is part of PyX (https://pyx-project.org/).
#
# PyX 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.
#
# PyX 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 PyX; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
import datetime
from pyx.graph import style
from pyx.graph.axis import axis, rater
"""some experimental code for creating a time axis
- it needs python 2.3 to be used (it is based on the new datetime data type)
- a timeaxis is always based on the datetime data type (there is no distinction between times and dates)
"""
class timeaxis(axis.linear):
"time axis mapping based "
# TODO: how to deal with reversed timeaxis?
def __init__(self, parter=None, rater=rater.linear(), **args):
super().__init__(self, divisor=None, **args)
self.parter = parter
self.rater = rater
def convert(self, data, x):
# XXX float division of timedelta instances
def mstimedelta(td):
"return the timedelta in microseconds"
return td.microseconds + 1000000*(td.seconds + 3600*24*td.days)
return mstimedelta(x - data.min) / float(mstimedelta(data.max - data.min))
# we could store float(mstimedelta(self.dx)) instead of self.dx, but
# I prefer a different solution (not based on huge integers) for the
# future
zero = datetime.timedelta(0)
class timetick(datetime.datetime):
# TODO: http://stackoverflow.com/questions/399022/why-cant-i-subclass-datetime-date
# possible fix: make the datetime an attribute of the tick
def __new__(cls, year, month, day, ticklevel=0, labellevel=0, label=None, labelattrs=[], **kwargs):
return datetime.datetime.__new__(cls, year, month, day, **kwargs)
def __init__(self, year, month, day, ticklevel=0, labellevel=0, label=None, labelattrs=[], **kwargs):
self.ticklevel = ticklevel
self.labellevel = labellevel
self.label = label
self.labelattrs = labelattrs[:]
def merge(self, other):
if self.ticklevel is None or (other.ticklevel is not None and other.ticklevel < self.ticklevel):
self.ticklevel = other.ticklevel
if self.labellevel is None or (other.labellevel is not None and other.labellevel < self.labellevel):
self.labellevel = other.labellevel
class timetexter:
def __init__(self, format="%c"):
self.format = format
def labels(self, ticks):
for tick in ticks:
if tick.labellevel is not None and tick.label is None:
tick.label = tick.strftime(self.format)
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