# Simple GUI example 2

# Copyright (c) 2005 Nokia Corporation

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#     http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

import socket

import urllib

import e32

import appuifw

choices =[(u"Los Angeles Intl Airport", "KLAX"),

          (u"Dallas/Fort Forth", "KDFW"),

          (u"New York/John F. Kennedy", "KJFK")]

choices_labels = [x[0] for x in choices]

weather_url_base = "http://weather.gov/data/current_obs/"

tempfile = "c:\\weather.xml"

def find_value(text, tag):

    "Find the value between <tag> and </tag> in text. Always returns a string"

    begin_tag = "<" + tag + ">"

    begin = text.find(begin_tag)

    end = text.find("</" + tag + ">")

    if begin == -1 or end == -1:

        return ""

    begin += len(begin_tag)

    return text[begin:end]

def handle_selection():

    index = lb.current()

    code = choices[index][1]

    weather_url = weather_url_base + code + ".xml"

    lb.set_list([u"Please wait..."])

    appuifw.note(u"Fetching "+ weather_url, 'info')

    try:

        urllib.urlretrieve(weather_url, tempfile)

        f = open(tempfile, 'r')

        weatherinfo = f.read()

        f.close()

        weather = find_value(weatherinfo, "weather")

        temperature_string = find_value(weatherinfo, "temperature_string")

        appuifw.popup_menu([(u"Weather", unicode(weather)), 

                            (u"Temperature", unicode(temperature_string))], 

                            unicode(code))

    except IOError:

        appuifw.note(u"Connection error to server", 'error')

    except:

        appuifw.note(u"Could not fetch information", 'error')

    lb.set_list(choices_labels)

def handle_add():

    pass

def handle_delete():

    pass

def exit_key_handler():

    app_lock.signal()

lb = appuifw.Listbox(choices_labels, handle_selection)

old_title = appuifw.app.title

appuifw.app.title = u"Weather report"

appuifw.app.body = lb

appuifw.app.menu = [(u"Add new item", handle_add),

                    (u"Delete item", handle_delete)]

appuifw.app.exit_key_handler = exit_key_handler

app_lock = e32.Ao_lock()

app_lock.wait()

appuifw.app.title = old_title