# -*- coding: iso-8859-1 -*- # ----------------------------------------------------------------------- # weather.py - IdleBarplugin for weather # ----------------------------------------------------------------------- # $Id: weather.py 11243 2009-01-14 16:10:43Z duncan $ # # ----------------------------------------------------------------------- # Freevo - A Home Theater PC framework # Copyright (C) 2003 Krister Lagerstrom, et al. # Please see the file freevo/Docs/CREDITS for a complete list of authors. # # 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 MER- # CHANTABILITY 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 # # ----------------------------------------------------------------------- # python modules import os import time import string from threading import Thread, Condition import kaa.imlib2 as imlib2 import config import plugin from plugins.idlebar import IdleBarPlugin import util.pymetar as pymetar class WeatherFetcher(Thread): """ Class to fetch the weather in a thread """ def __init__(self, refreshinterval, metarcode, tempunits, cachefile): """ Initialise the thread """ Thread.__init__(self) _debug_('WeatherFetcher.__init__(refreshinterval=%r, metarcode=%r, tempunits=%r, cachefile=%r)' % ( refreshinterval, metarcode, tempunits, cachefile), 2) self.refreshinterval = refreshinterval self.metarcode = metarcode self.tempunits = tempunits self.cachefile = cachefile self.stopping = False self.temperature = '?' self.icon = 'na.png' def run(self): """ Thread to fetch the weather and write the results to a cache file """ _debug_('WeatherFetcher(%r) thread started' % (self.metarcode,), 1) while not self.stopping: refreshtime = time.time() + self.refreshinterval _debug_('WeatherFetcher(%r).run' % (self.metarcode,), 1) try: rf = pymetar.WeatherFetcher(self.metarcode) rp = pymetar.ReportParser() rep = rf.FetchReport() pr = rp.ParseReport(rep) if pr.getTemperatureCelsius(): if self.tempunits == 'F': self.temperature = '%2d' % pr.getTemperatureFahrenheit() elif self.tempunits == 'K': self.temperature = '%3d' % pr.getTemperatureCelsius() + 273 else: self.temperature = '%2d' % pr.getTemperatureCelsius() else: self.temperature = '?' if pr.getPixmap(): self.icon = pr.getPixmap() + '.png' else: self.icon = 'na.png' try: cachefile = open(self.cachefile, 'w+') cachefile.write(self.temperature + '\n') cachefile.write(self.icon + '\n') cachefile.close() _debug_('WeatherFetcher cache (%s %s)' % (self.temperature, self.icon), 1) except IOError, why: _debug_('Failed to create %r: %s' % (self.cachefile, why), DWARNING) except Exception, why: _debug_(why, DERROR) _debug_('WeatherFetcher(%r).ran' % (self.metarcode,), 1) while time.time() < refreshtime: if self.stopping: break time.sleep(1) _debug_('WeatherFetcher(%r) thread finished' % (self.metarcode,), 1) class PluginInterface(IdleBarPlugin): """ Shows the current weather. Activate with: | plugin.activate('idlebar.weather', level=30, args=('4-letter code', )) For weather station codes see: http://www.nws.noaa.gov/tg/siteloc.shtml You can also set the unit as second parameter in args ('C', 'F', or 'K') """ def __init__(self, zone='CYYZ', units='C'): """ Initialise an instance of the PluginInterface """ _debug_('PluginInterface.__init__(zone=%r, units=%r)' % (zone, units), 2) if not config.SYS_USE_NETWORK: self.reason = 'SYS_USE_NETWORK not enabled' return IdleBarPlugin.__init__(self) self.plugin_name = 'idlebar.weather' self.tempunits = units self.metarcode = zone self.cachefile = config.FREEVO_CACHEDIR + '/weather' self.cachetime = 0 self.fetcher = WeatherFetcher(config.IDLEBAR_WEATHER_REFRESH, self.metarcode, self.tempunits, self.cachefile) self.fetcher.start() def config(self): return [ ('IDLEBAR_WEATHER_REFRESH', 3600, 'The time to refresh the weather cache'), ] def shutdown(self): """ System Shutdown; stop the fetcher thread and wait for it to finish """ _debug_('shutdown()', 2) self.fetcher.stopping = True self.fetcher.join() def checkweather(self): """ We don't want to do this every 30 seconds, so we need to cache the date somewhere. """ _debug_('checkweather()', 2) try: temperature, icon = '?', 'na.png' if os.path.isfile(self.cachefile): cachefd = open(self.cachefile, 'r') newlist = map(string.rstrip, cachefd.readlines()) temperature, icon = newlist cachefd.close() return temperature, icon except Exception, why: _debug_(why, DERROR) def calc_positions(self, osd, image_w, image_h, text_w, text_h): """ Calculate the position of the image and text @returns: tuple of positions and width """ if image_w >= text_w: image_x = 0 text_x = ((image_w - text_w) / 2) else: image_x = ((text_w - image_w) / 2) text_x = 0 image_y = osd.y + 7 text_y = osd.y + 55 - text_h width = image_w > text_w and image_w or text_w return (image_x, image_y, text_x, text_y, width) def draw(self, (type, object), x, osd): """ Draw the icon and temperature on the idlebar @returns: width of the icon """ _debug_('draw((type=%r, object=%r), x=%r, osd=%r)' % (type, object, x, osd), 2) temp, icon = self.checkweather() image_file = os.path.join(config.ICON_DIR, 'weather', icon) w, h = imlib2.open(image_file).size temperature = u'%s\xb0' % temp font = osd.get_font(config.OSD_IDLEBAR_FONT) widthtxt = font.stringsize(temperature) (image_x, image_y, text_x, text_y, width) = self.calc_positions(osd, w, h, widthtxt, font.h) osd.draw_image(image_file, (x+image_x, image_y, -1, -1)) osd.write_text(temperature, font, None, x+text_x, text_y, widthtxt, font.h, 'center', 'top') return width