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140 lines
4.1 KiB
140 lines
4.1 KiB
from PyQt4.QtGui import *
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from PyQt4.QtCore import *
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import decimal
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import httplib
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import json
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import threading
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import re
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from decimal import Decimal
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from electrum.plugins import BasePlugin
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from electrum.i18n import _
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from electrum_gui.qt.util import *
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class Exchanger(threading.Thread):
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def __init__(self, parent):
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threading.Thread.__init__(self)
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self.daemon = True
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self.parent = parent
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self.quote_currencies = None
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self.lock = threading.Lock()
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def exchange(self, btc_amount, quote_currency):
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with self.lock:
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if self.quote_currencies is None:
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return None
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quote_currencies = self.quote_currencies.copy()
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if quote_currency not in quote_currencies:
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return None
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return btc_amount * quote_currencies[quote_currency]
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def run(self):
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try:
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connection = httplib.HTTPConnection('blockchain.info')
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connection.request("GET", "/ticker")
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except:
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return
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response = connection.getresponse()
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if response.reason == httplib.responses[httplib.NOT_FOUND]:
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return
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try:
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response = json.loads(response.read())
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except:
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return
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quote_currencies = {}
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try:
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for r in response:
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quote_currencies[r] = self._lookup_rate(response, r)
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with self.lock:
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self.quote_currencies = quote_currencies
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self.parent.set_currencies(quote_currencies)
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except KeyError:
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pass
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def get_currencies(self):
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return [] if self.quote_currencies == None else sorted(self.quote_currencies.keys())
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def _lookup_rate(self, response, quote_id):
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return decimal.Decimal(str(response[str(quote_id)]["15m"]))
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class Plugin(BasePlugin):
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def fullname(self):
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return "Exchange rates"
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def description(self):
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return """exchange rates, retrieved from blockchain.info"""
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def __init__(self,a,b):
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BasePlugin.__init__(self,a,b)
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self.currencies = [self.config.get('currency', "EUR")]
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def init(self):
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self.win = self.gui.main_window
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self.win.connect(self.win, SIGNAL("refresh_currencies()"), self.win.update_status)
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# Do price discovery
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self.exchanger = Exchanger(self)
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self.exchanger.start()
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self.gui.exchanger = self.exchanger #
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def set_currencies(self, quote_currencies):
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self.currencies = sorted(quote_currencies.keys())
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self.win.emit(SIGNAL("refresh_currencies()"))
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self.win.emit(SIGNAL("refresh_currencies_combo()"))
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def set_quote_text(self, btc_balance, r):
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r[0] = self.create_quote_text(Decimal(btc_balance) / 100000000)
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def create_quote_text(self, btc_balance):
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quote_currency = self.config.get("currency", "EUR")
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quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
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if quote_balance is None:
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quote_text = ""
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else:
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quote_text = "%.2f %s" % (quote_balance, quote_currency)
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return quote_text
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def requires_settings(self):
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return True
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def toggle(self):
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out = BasePlugin.toggle(self)
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self.win.update_status()
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return out
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def settings_widget(self, window):
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combo = QComboBox()
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def on_change(x):
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cur_request = str(self.currencies[x])
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if cur_request != self.config.get('currency', "EUR"):
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self.config.set_key('currency', cur_request, True)
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self.win.update_status()
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def set_currencies(combo):
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try:
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combo.clear()
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except:
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return
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combo.addItems(self.currencies)
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try:
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index = self.currencies.index(self.config.get('currency', "EUR"))
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except:
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index = 0
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combo.setCurrentIndex(index)
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set_currencies(combo)
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combo.currentIndexChanged.connect(on_change)
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combo.connect(window, SIGNAL('refresh_currencies_combo()'), lambda: set_currencies(combo))
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return combo
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