/usr/share/doc/python-gtkmvc-doc/examples/converter/src/models/currencies.py is in python-gtkmvc-doc 1.99.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | # Author: Roberto Cavada <roboogle@gmail.com>
#
# Copyright (c) 2006 by Roberto Cavada
#
# pygtkmvc is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# pygtkmvc 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110, USA.
#
# For more information on pygtkmvc see <http://pygtkmvc.sourceforge.net>
# or email to the author <roboogle@gmail.com>.
# Please report bugs to <roboogle@gmail.com>.
import utils._importer
import utils.globals
from currency import CurrencyModel
from gtkmvc import ListStoreModel
import os.path
import gobject
import xml.parsers.expat
class CurrenciesModel (ListStoreModel):
"""Model the currencies set. If a model is loaded from file, the
file is kept aligned if the model is changed later"""
def __init__(self, filename=None):
ListStoreModel.__init__(self, gobject.TYPE_PYOBJECT # currency model
);
self.parser = xml.parsers.expat.ParserCreate()
self.parser.StartElementHandler = self.__start_element
self.parser.EndElementHandler = self.__end_element
self.parser.CharacterDataHandler = self.__char_data
self.__init_parser()
self.load(filename)
return
def add(self, model):
"""raises an exception if the model cannot be added"""
def foo(m, p, i):
if m[i][0].name == model.name:
raise ValueError("Model already exists")
return
# checks if already existing
self.foreach(foo)
self.append((model,))
return
def load(self, filename):
self.filename = filename
if filename is None: return
f = open(self.filename, "r")
self.parser.ParseFile(f)
return
# ----------------------------
# Private methods
# ----------------------------
def __init_parser(self):
self.__elem_stack = []
self.__curr_data = ""
self.__elems = {
"name" : None,
"rate" : None,
"notes" : None,
}
return
def __start_element(self, name, attrs):
self.__elem_stack.append(name)
self.__curr_data = ""
return
def __end_element(self, name):
top = self.__elem_stack.pop()
assert(top == name)
if name in self.__elems:
self.__elems[name] = self.__curr_data.strip()
self.__curr_data = ""
elif name == "currency":
m = CurrencyModel(self.__elems["name"],
float(self.__elems["rate"]),
self.__elems["notes"])
self.add(m)
else: assert(name == "currencies")
return
def __char_data(self, data):
self.__curr_data += data
return
pass # end of class
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