1 # Simple GUI example 2

     2 

     3 # Copyright (c) 2005 Nokia Corporation

     4 #

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

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

     7 # You may obtain a copy of the License at

     8 #

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

    10 #

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

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

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

    14 # See the License for the specific language governing permissions and

    15 # limitations under the License.

    16 

    17 import socket

    18 import urllib

    19 

    20 import e32

    21 import appuifw

    22 

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

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

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

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

    27         

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

    29 tempfile = "c:\\weather.xml"

    30 

    31 def find_value(text, tag):

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

    33     begin_tag = "<" + tag + ">"

    34     begin = text.find(begin_tag)

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

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

    37         return ""

    38     begin += len(begin_tag)

    39     return text[begin:end]

    40 

    41 def handle_selection():

    42     index = lb.current()

    43     code = choices[index][1]

    44     weather_url = weather_url_base + code + ".xml"

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

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

    47     try:

    48         urllib.urlretrieve(weather_url, tempfile)

    49         f = open(tempfile, 'r')

    50         weatherinfo = f.read()

    51         f.close()

    52         weather = find_value(weatherinfo, "weather")

    53         temperature_string = find_value(weatherinfo,

    54                                         "temperature_string")

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

    56                             (u"Temperature", 

    57                              unicode(temperature_string))], 

    58                            unicode(code))

    59     except IOError:

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

    61     except:

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

    63     lb.set_list(choices_labels)

    64 

    65 def handle_add():

    66     pass

    67 

    68 def handle_delete():

    69     pass

    70 

    71 def exit_key_handler():

    72     app_lock.signal()

    73 

    74 lb = appuifw.Listbox(choices_labels, handle_selection)

    75 

    76 old_title = appuifw.app.title

    77 appuifw.app.title = u"Weather report"

    78 appuifw.app.body = lb

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

    80                     (u"Delete item", handle_delete)]

    81 appuifw.app.exit_key_handler = exit_key_handler

    82 

    83 app_lock = e32.Ao_lock()

    84 app_lock.wait()

    85 

    86 appuifw.app.title = old_title

    87