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from PyQt4.QtGui import *
from PyQt4.QtCore import *
from electrum_gui.qt.util import *
from electrum_gui.qt.amountedit import AmountEdit
from electrum.bitcoin import COIN
from electrum.i18n import _
from decimal import Decimal
from functools import partial
from electrum.plugins import hook
from exchange_rate import FxPlugin
class Plugin(FxPlugin):
def connect_fields(self, window, btc_e, fiat_e, fee_e):
def edit_changed(edit):
edit.setStyleSheet(BLACK_FG)
fiat_e.is_last_edited = (edit == fiat_e)
amount = edit.get_amount()
rate = self.exchange_rate()
if rate is None or amount is None:
if edit is fiat_e:
btc_e.setText("")
if fee_e:
fee_e.setText("")
else:
fiat_e.setText("")
else:
if edit is fiat_e:
btc_e.setAmount(int(amount / Decimal(rate) * COIN))
if fee_e: window.update_fee()
btc_e.setStyleSheet(BLUE_FG)
else:
fiat_e.setText(self.ccy_amount_str(
amount * Decimal(rate) / COIN, False))
fiat_e.setStyleSheet(BLUE_FG)
fiat_e.textEdited.connect(partial(edit_changed, fiat_e))
btc_e.textEdited.connect(partial(edit_changed, btc_e))
fiat_e.is_last_edited = False
@hook
def init_qt(self, gui):
self.app = gui.app
@hook
def do_clear(self, window):
window.fiat_send_e.setText('')
def on_close(self):
self.app.emit(SIGNAL('close_fx_plugin'))
def restore_window(self, window):
window.update_status()
window.history_list.refresh_headers()
window.fiat_send_e.hide()
window.fiat_receive_e.hide()
def on_quotes(self):
self.app.emit(SIGNAL('new_fx_quotes'))
def on_history(self):
self.app.emit(SIGNAL('new_fx_history'))
def on_fx_history(self, window):
'''Called when historical fx quotes are updated'''
window.history_list.update()
def on_fx_quotes(self, window):
'''Called when fresh spot fx quotes come in'''
window.update_status()
self.populate_ccy_combo()
# Refresh edits with the new rate
edit = window.fiat_send_e if window.fiat_send_e.is_last_edited else window.amount_e
edit.textEdited.emit(edit.text())
edit = window.fiat_receive_e if window.fiat_receive_e.is_last_edited else window.receive_amount_e
edit.textEdited.emit(edit.text())
# History tab needs updating if it used spot
if self.history_used_spot:
self.on_fx_history(window)
def on_ccy_combo_change(self):
'''Called when the chosen currency changes'''
ccy = str(self.ccy_combo.currentText())
if ccy and ccy != self.ccy:
self.ccy = ccy
self.config.set_key('currency', ccy, True)
self.app.emit(SIGNAL('new_fx_quotes'))
self.get_historical_rates() # Because self.ccy changes
self.hist_checkbox_update()
def hist_checkbox_update(self):
if self.hist_checkbox:
self.hist_checkbox.setEnabled(self.ccy in self.exchange.history_ccys())
self.hist_checkbox.setChecked(self.config_history())
def populate_ccy_combo(self):
# There should be at most one instance of the settings dialog
combo = self.ccy_combo
# NOTE: bool(combo) is False if it is empty. Nuts.
if combo is not None:
combo.blockSignals(True)
combo.clear()
combo.addItems(sorted(self.exchange.quotes.keys()))
combo.blockSignals(False)
combo.setCurrentIndex(combo.findText(self.ccy))
@hook
def on_new_window(self, window):
# Additional send and receive edit boxes
send_e = AmountEdit(self.config_ccy)
window.send_grid.addWidget(send_e, 4, 2, Qt.AlignLeft)
window.amount_e.frozen.connect(
lambda: send_e.setFrozen(window.amount_e.isReadOnly()))
receive_e = AmountEdit(self.config_ccy)
window.receive_grid.addWidget(receive_e, 2, 2, Qt.AlignLeft)
window.fiat_send_e = send_e
window.fiat_receive_e = receive_e
self.connect_fields(window, window.amount_e, send_e, window.fee_e)
self.connect_fields(window, window.receive_amount_e, receive_e, None)
window.history_list.refresh_headers()
window.update_status()
window.connect(window.app, SIGNAL('new_fx_quotes'), lambda: self.on_fx_quotes(window))
window.connect(window.app, SIGNAL('new_fx_history'), lambda: self.on_fx_history(window))
window.connect(window.app, SIGNAL('close_fx_plugin'), lambda: self.restore_window(window))
window.connect(window.app, SIGNAL('refresh_headers'), window.history_list.refresh_headers)
def settings_widget(self, window):
return EnterButton(_('Settings'), partial(self.settings_dialog, window))
def settings_dialog(self, window):
d = WindowModalDialog(window, _("Exchange Rate Settings"))
layout = QGridLayout(d)
layout.addWidget(QLabel(_('Exchange rate API: ')), 0, 0)
layout.addWidget(QLabel(_('Currency: ')), 1, 0)
layout.addWidget(QLabel(_('History Rates: ')), 2, 0)
# Currency list
self.ccy_combo = QComboBox()
self.ccy_combo.currentIndexChanged.connect(self.on_ccy_combo_change)
self.populate_ccy_combo()
def on_change_ex(idx):
exchange = str(combo_ex.currentText())
if exchange != self.exchange.name():
self.set_exchange(exchange)
self.hist_checkbox_update()
def on_change_hist(checked):
if checked:
self.config.set_key('history_rates', 'checked')
self.get_historical_rates()
else:
self.config.set_key('history_rates', 'unchecked')
self.app.emit(SIGNAL('refresh_headers'))
def ok_clicked():
self.timeout = 0
self.ccy_combo = None
d.accept()
combo_ex = QComboBox()
combo_ex.addItems(sorted(self.exchanges.keys()))
combo_ex.setCurrentIndex(combo_ex.findText(self.config_exchange()))
combo_ex.currentIndexChanged.connect(on_change_ex)
self.hist_checkbox = QCheckBox()
self.hist_checkbox.stateChanged.connect(on_change_hist)
self.hist_checkbox_update()
ok_button = QPushButton(_("OK"))
ok_button.clicked.connect(lambda: ok_clicked())
layout.addWidget(self.ccy_combo,1,1)
layout.addWidget(combo_ex,0,1)
layout.addWidget(self.hist_checkbox,2,1)
layout.addWidget(ok_button,3,1)
return d.exec_()