lib/gui_lite.py

   1 import sys
   2
   3 from PyQt4.QtCore import *
   4 from PyQt4.QtGui import *
   5
   6 from decimal import Decimal as D
   7 from interface import DEFAULT_SERVERS
   8 from util import get_resource_path as rsrc
   9 from i18n import _
  10 import decimal
  11 import exchange_rate
  12 import os.path
  13 import random
  14 import re
  15 import time
  16 import wallet
  17 import webbrowser
  18 import history_widget
  19 import util
  20
  21 import gui_qt
  22
  23 bitcoin = lambda v: v * 100000000
  24
  25 def IconButton(filename, parent=None):
  26     pixmap = QPixmap(filename)
  27     icon = QIcon(pixmap)
  28     return QPushButton(icon, "", parent)
  29
  30 class Timer(QThread):
  31     def run(self):
  32         while True:
  33             self.emit(SIGNAL('timersignal'))
  34             time.sleep(0.5)
  35
  36 def resize_line_edit_width(line_edit, text_input):
  37     metrics = QFontMetrics(qApp.font())
  38     # Create an extra character to add some space on the end
  39     text_input += "A"
  40     line_edit.setMinimumWidth(metrics.width(text_input))
  41
  42 class ElectrumGui(QObject):
  43
  44     def __init__(self, wallet):
  45         super(QObject, self).__init__()
  46
  47         self.wallet = wallet
  48         self.app = QApplication(sys.argv)
  49
  50     def main(self, url):
  51         actuator = MiniActuator(self.wallet)
  52         self.connect(self, SIGNAL("updateservers()"),
  53                      actuator.update_servers_list)
  54         # Should probably not modify the current path but instead
  55         # change the behaviour of rsrc(...)
  56         old_path = QDir.currentPath()
  57         actuator.load_theme()
  58
  59         self.mini = MiniWindow(actuator, self.expand)
  60         driver = MiniDriver(self.wallet, self.mini)
  61
  62         # Reset path back to original value now that loading the GUI
  63         # is completed.
  64         QDir.setCurrent(old_path)
  65
  66         if url:
  67             self.set_url(url)
  68
  69         timer = Timer()
  70         timer.start()
  71         self.expert = gui_qt.ElectrumWindow(self.wallet)
  72         self.expert.app = self.app
  73         self.expert.connect_slots(timer)
  74         self.expert.update_wallet()
  75
  76         self.app.exec_()
  77
  78     def server_list_changed(self):
  79         self.emit(SIGNAL("updateservers()"))
  80
  81     def expand(self):
  82         """Hide the lite mode window and show pro-mode."""
  83         self.mini.hide()
  84         self.expert.show()
  85
  86     def set_url(self, url):
  87         payto, amount, label, message, signature, identity, url = \
  88             self.wallet.parse_url(url, self.show_message, self.show_question)
  89         self.mini.set_payment_fields(payto, amount)
  90
  91     def show_message(self, message):
  92         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
  93
  94     def show_question(self, message):
  95         choice = QMessageBox.question(self.mini, _("Message"), message,
  96                                       QMessageBox.Yes|QMessageBox.No,
  97                                       QMessageBox.No)
  98         return choice == QMessageBox.Yes
  99
 100     def restore_or_create(self):
 101         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 102         return qt_gui_object.restore_or_create()
 103
 104 class MiniWindow(QDialog):
 105
 106     def __init__(self, actuator, expand_callback):
 107         super(MiniWindow, self).__init__()
 108
 109         self.actuator = actuator
 110
 111         self.btc_balance = None
 112         self.quote_currencies = ["EUR", "USD", "GBP"]
 113         self.actuator.set_configured_currency(self.set_quote_currency)
 114         self.exchanger = exchange_rate.Exchanger(self)
 115         # Needed because price discovery is done in a different thread
 116         # which needs to be sent back to this main one to update the GUI
 117         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 118
 119         self.balance_label = BalanceLabel(self.change_quote_currency)
 120         self.balance_label.setObjectName("balance_label")
 121
 122         self.receive_button = QPushButton(_("&Receive"))
 123         self.receive_button.setObjectName("receive_button")
 124         self.receive_button.setDefault(True)
 125         self.receive_button.clicked.connect(self.copy_address)
 126
 127         # Bitcoin address code
 128         self.address_input = QLineEdit()
 129         self.address_input.setPlaceholderText(_("Enter a Bitcoin address..."))
 130         self.address_input.setObjectName("address_input")
 131
 132
 133         self.address_input.textEdited.connect(self.address_field_changed)
 134         resize_line_edit_width(self.address_input,
 135                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 136
 137         self.address_completions = QStringListModel()
 138         address_completer = QCompleter(self.address_input)
 139         address_completer.setCaseSensitivity(False)
 140         address_completer.setModel(self.address_completions)
 141         self.address_input.setCompleter(address_completer)
 142
 143         address_layout = QHBoxLayout()
 144         address_layout.addWidget(self.address_input)
 145
 146         self.amount_input = QLineEdit()
 147         self.amount_input.setPlaceholderText(_("... and amount"))
 148         self.amount_input.setObjectName("amount_input")
 149         # This is changed according to the user's displayed balance
 150         self.amount_validator = QDoubleValidator(self.amount_input)
 151         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 152         self.amount_validator.setDecimals(8)
 153         self.amount_input.setValidator(self.amount_validator)
 154
 155         # This removes the very ugly OSX highlighting, please leave this in :D
 156         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 157         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 158         self.amount_input.textChanged.connect(self.amount_input_changed)
 159
 160         self.send_button = QPushButton(_("&Send"))
 161         self.send_button.setObjectName("send_button")
 162         self.send_button.setDisabled(True);
 163         self.send_button.clicked.connect(self.send)
 164
 165         main_layout = QGridLayout(self)
 166
 167         main_layout.addWidget(self.balance_label, 0, 0)
 168         main_layout.addWidget(self.receive_button, 0, 1)
 169
 170         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 171
 172         main_layout.addWidget(self.amount_input, 2, 0)
 173         main_layout.addWidget(self.send_button, 2, 1)
 174
 175         self.history_list = history_widget.HistoryWidget()
 176         self.history_list.setObjectName("history")
 177         self.history_list.hide()
 178         self.history_list.setAlternatingRowColors(True)
 179         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 180
 181         menubar = QMenuBar()
 182         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 183         servers_menu = electrum_menu.addMenu(_("&Servers"))
 184         servers_group = QActionGroup(self)
 185         self.actuator.set_servers_gui_stuff(servers_menu, servers_group)
 186         self.actuator.populate_servers_menu()
 187         electrum_menu.addSeparator()
 188         brain_seed = electrum_menu.addAction(_("&BrainWallet Info"))
 189         brain_seed.triggered.connect(self.actuator.show_seed_dialog)
 190         quit_option = electrum_menu.addAction(_("&Quit"))
 191         quit_option.triggered.connect(self.close)
 192
 193         view_menu = menubar.addMenu(_("&View"))
 194         expert_gui = view_menu.addAction(_("&Pro Mode"))
 195         expert_gui.triggered.connect(expand_callback)
 196         themes_menu = view_menu.addMenu(_("&Themes"))
 197         selected_theme = self.actuator.selected_theme()
 198         theme_group = QActionGroup(self)
 199         for theme_name in self.actuator.theme_names():
 200             theme_action = themes_menu.addAction(theme_name)
 201             theme_action.setCheckable(True)
 202             if selected_theme == theme_name:
 203                 theme_action.setChecked(True)
 204             class SelectThemeFunctor:
 205                 def __init__(self, theme_name, toggle_theme):
 206                     self.theme_name = theme_name
 207                     self.toggle_theme = toggle_theme
 208                 def __call__(self, checked):
 209                     if checked:
 210                         self.toggle_theme(self.theme_name)
 211             delegate = SelectThemeFunctor(theme_name, self.toggle_theme)
 212             theme_action.toggled.connect(delegate)
 213             theme_group.addAction(theme_action)
 214         view_menu.addSeparator()
 215         show_history = view_menu.addAction(_("Show History"))
 216         show_history.setCheckable(True)
 217         show_history.toggled.connect(self.show_history)
 218
 219         help_menu = menubar.addMenu(_("&Help"))
 220         the_website = help_menu.addAction(_("&Website"))
 221         the_website.triggered.connect(self.the_website)
 222         help_menu.addSeparator()
 223         report_bug = help_menu.addAction(_("&Report Bug"))
 224         report_bug.triggered.connect(self.show_report_bug)
 225         show_about = help_menu.addAction(_("&About"))
 226         show_about.triggered.connect(self.show_about)
 227         main_layout.setMenuBar(menubar)
 228
 229         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 230         quit_shortcut.activated.connect(self.close)
 231         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 232         close_shortcut.activated.connect(self.close)
 233
 234         self.setWindowIcon(QIcon(":electrum.png"))
 235         self.setWindowTitle("Electrum")
 236         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 237         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 238         self.setObjectName("main_window")
 239         self.show()
 240
 241     def toggle_theme(self, theme_name):
 242         old_path = QDir.currentPath()
 243         self.actuator.change_theme(theme_name)
 244         # Recompute style globally
 245         qApp.style().unpolish(self)
 246         qApp.style().polish(self)
 247         QDir.setCurrent(old_path)
 248
 249     def closeEvent(self, event):
 250         super(MiniWindow, self).closeEvent(event)
 251         qApp.quit()
 252
 253     def set_payment_fields(self, dest_address, amount):
 254         self.address_input.setText(dest_address)
 255         self.address_field_changed(dest_address)
 256         self.amount_input.setText(amount)
 257
 258     def activate(self):
 259         pass
 260
 261     def deactivate(self):
 262         pass
 263
 264     def set_quote_currency(self, currency):
 265         """Set and display the fiat currency country."""
 266         assert currency in self.quote_currencies
 267         self.quote_currencies.remove(currency)
 268         self.quote_currencies.insert(0, currency)
 269         self.refresh_balance()
 270
 271     def change_quote_currency(self):
 272         self.quote_currencies = \
 273             self.quote_currencies[1:] + self.quote_currencies[0:1]
 274         self.actuator.set_config_currency(self.quote_currencies[0])
 275         self.refresh_balance()
 276
 277     def refresh_balance(self):
 278         if self.btc_balance is None:
 279             # Price has been discovered before wallet has been loaded
 280             # and server connect... so bail.
 281             return
 282         self.set_balances(self.btc_balance)
 283         self.amount_input_changed(self.amount_input.text())
 284
 285     def set_balances(self, btc_balance):
 286         """Set the bitcoin balance and update the amount label accordingly."""
 287         self.btc_balance = btc_balance
 288         quote_text = self.create_quote_text(btc_balance)
 289         if quote_text:
 290             quote_text = "(%s)" % quote_text
 291         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 292         self.balance_label.set_balance_text(btc_balance, quote_text)
 293         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 294
 295     def amount_input_changed(self, amount_text):
 296         """Update the number of bitcoins displayed."""
 297         self.check_button_status()
 298
 299         try:
 300             amount = D(str(amount_text))
 301         except decimal.InvalidOperation:
 302             self.balance_label.show_balance()
 303         else:
 304             quote_text = self.create_quote_text(amount * bitcoin(1))
 305             if quote_text:
 306                 self.balance_label.set_amount_text(quote_text)
 307                 self.balance_label.show_amount()
 308             else:
 309                 self.balance_label.show_balance()
 310
 311     def create_quote_text(self, btc_balance):
 312         """Return a string copy of the amount fiat currency the
 313         user has in bitcoins."""
 314         quote_currency = self.quote_currencies[0]
 315         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 316         if quote_balance is None:
 317             quote_text = ""
 318         else:
 319             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 320                                       quote_currency)
 321         return quote_text
 322
 323     def send(self):
 324         if self.actuator.send(self.address_input.text(),
 325                               self.amount_input.text(), self):
 326             self.address_input.setText("")
 327             self.amount_input.setText("")
 328
 329     def check_button_status(self):
 330         """Check that the bitcoin address is valid and that something
 331         is entered in the amount before making the send button clickable."""
 332         try:
 333             value = D(str(self.amount_input.text())) * 10**8
 334         except decimal.InvalidOperation:
 335             value = None
 336         # self.address_input.property(...) returns a qVariant, not a bool.
 337         # The == is needed to properly invoke a comparison.
 338         if (self.address_input.property("isValid") == True and
 339             value is not None and 0 < value <= self.btc_balance):
 340             self.send_button.setDisabled(False)
 341         else:
 342             self.send_button.setDisabled(True)
 343
 344     def address_field_changed(self, address):
 345         if self.actuator.is_valid(address):
 346             self.check_button_status()
 347             self.address_input.setProperty("isValid", True)
 348             self.recompute_style(self.address_input)
 349         else:
 350             self.send_button.setDisabled(True)
 351             self.address_input.setProperty("isValid", False)
 352             self.recompute_style(self.address_input)
 353
 354         if len(address) == 0:
 355             self.address_input.setProperty("isValid", None)
 356             self.recompute_style(self.address_input)
 357
 358     def recompute_style(self, element):
 359         self.style().unpolish(element)
 360         self.style().polish(element)
 361
 362     def copy_address(self):
 363         receive_popup = ReceivePopup(self.receive_button)
 364         self.actuator.copy_address(receive_popup)
 365
 366     def update_completions(self, completions):
 367         self.address_completions.setStringList(completions)
 368
 369     def update_history(self, tx_history):
 370         for tx in tx_history[-10:]:
 371             address = tx["default_label"]
 372             amount = D(tx["value"]) / 10**8
 373             self.history_list.append(address, amount)
 374
 375     def acceptbit(self):
 376         self.actuator.acceptbit(self.quote_currencies[0])
 377
 378     def the_website(self):
 379         webbrowser.open("http://electrum-desktop.com")
 380
 381     def show_about(self):
 382         QMessageBox.about(self, "Electrum",
 383             _("Electrum's focus is speed, with low resource usage and simplifying Bitcoin. You do not need to perform regular backups, because your wallet can be recovered from a secret phrase that you can memorize or write on paper. Startup times are instant because it operates in conjuction with high-performance servers that handle the most complicated parts of the Bitcoin system.\n\nSend donations to 1JwTMv4GWaPdf931N6LNPJeZBfZgZJ3zX1"))
 384
 385     def show_report_bug(self):
 386         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 387             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 388
 389     def show_history(self, toggle_state):
 390         if toggle_state:
 391             self.history_list.show()
 392         else:
 393             self.history_list.hide()
 394
 395 class BalanceLabel(QLabel):
 396
 397     SHOW_CONNECTING = 1
 398     SHOW_BALANCE = 2
 399     SHOW_AMOUNT = 3
 400
 401     def __init__(self, change_quote_currency, parent=None):
 402         super(QLabel, self).__init__(_("Connecting..."), parent)
 403         self.change_quote_currency = change_quote_currency
 404         self.state = self.SHOW_CONNECTING
 405         self.balance_text = ""
 406         self.amount_text = ""
 407
 408     def mousePressEvent(self, event):
 409         """Change the fiat currency selection if window background is clicked."""
 410         if self.state != self.SHOW_CONNECTING:
 411             self.change_quote_currency()
 412
 413     def set_balance_text(self, btc_balance, quote_text):
 414         """Set the amount of bitcoins in the gui."""
 415         if self.state == self.SHOW_CONNECTING:
 416             self.state = self.SHOW_BALANCE
 417         self.balance_text = "<span style='font-size: 18pt'>%s</span> <span style='font-size: 10pt'>BTC</span> <span style='font-size: 10pt'>%s</span>" % (btc_balance, quote_text)
 418         if self.state == self.SHOW_BALANCE:
 419             self.setText(self.balance_text)
 420
 421     def set_amount_text(self, quote_text):
 422         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 423         if self.state == self.SHOW_AMOUNT:
 424             self.setText(self.amount_text)
 425
 426     def show_balance(self):
 427         if self.state == self.SHOW_AMOUNT:
 428             self.state = self.SHOW_BALANCE
 429             self.setText(self.balance_text)
 430
 431     def show_amount(self):
 432         if self.state == self.SHOW_BALANCE:
 433             self.state = self.SHOW_AMOUNT
 434             self.setText(self.amount_text)
 435
 436 def ok_cancel_buttons(dialog):
 437     row_layout = QHBoxLayout()
 438     row_layout.addStretch(1)
 439     ok_button = QPushButton(_("OK"))
 440     row_layout.addWidget(ok_button)
 441     ok_button.clicked.connect(dialog.accept)
 442     cancel_button = QPushButton(_("Cancel"))
 443     row_layout.addWidget(cancel_button)
 444     cancel_button.clicked.connect(dialog.reject)
 445     return row_layout
 446
 447 class PasswordDialog(QDialog):
 448
 449     def __init__(self, parent):
 450         super(QDialog, self).__init__(parent)
 451
 452         self.setModal(True)
 453
 454         self.password_input = QLineEdit()
 455         self.password_input.setEchoMode(QLineEdit.Password)
 456
 457         main_layout = QVBoxLayout(self)
 458         message = _('Please enter your password')
 459         main_layout.addWidget(QLabel(message))
 460
 461         grid = QGridLayout()
 462         grid.setSpacing(8)
 463         grid.addWidget(QLabel(_('Password')), 1, 0)
 464         grid.addWidget(self.password_input, 1, 1)
 465         main_layout.addLayout(grid)
 466
 467         main_layout.addLayout(ok_cancel_buttons(self))
 468         self.setLayout(main_layout)
 469
 470     def run(self):
 471         if not self.exec_():
 472             return
 473         return unicode(self.password_input.text())
 474
 475 class ReceivePopup(QDialog):
 476
 477     def leaveEvent(self, event):
 478         self.close()
 479
 480     def setup(self, address):
 481         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 482         address_display = QLineEdit(address)
 483         address_display.setReadOnly(True)
 484         resize_line_edit_width(address_display, address)
 485
 486         main_layout = QVBoxLayout(self)
 487         main_layout.addWidget(label)
 488         main_layout.addWidget(address_display)
 489
 490         self.setMouseTracking(True)
 491         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 492         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|
 493                             Qt.MSWindowsFixedSizeDialogHint)
 494         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 495         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 496         #self.setAlignment(Qt.AlignCenter)
 497
 498     def popup(self):
 499         parent = self.parent()
 500         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 501         self.move(top_left_pos)
 502         center_mouse_pos = self.mapToGlobal(self.rect().center())
 503         QCursor.setPos(center_mouse_pos)
 504         self.show()
 505
 506 class MiniActuator:
 507     """Initialize the definitions relating to themes and
 508     sending/recieving bitcoins."""
 509
 510
 511     def __init__(self, wallet):
 512         """Retrieve the gui theme used in previous session."""
 513         self.wallet = wallet
 514         self.theme_name = self.wallet.theme
 515         self.themes = util.load_theme_paths()
 516
 517     def load_theme(self):
 518         """Load theme retrieved from wallet file."""
 519         try:
 520             theme_prefix, theme_path = self.themes[self.theme_name]
 521         except KeyError:
 522             util.print_error("Theme not found!", self.theme_name)
 523             return
 524         QDir.setCurrent(os.path.join(theme_prefix, theme_path))
 525         with open(rsrc("style.css")) as style_file:
 526             qApp.setStyleSheet(style_file.read())
 527
 528     def theme_names(self):
 529         """Sort themes."""
 530         return sorted(self.themes.keys())
 531
 532     def selected_theme(self):
 533         """Select theme."""
 534         return self.theme_name
 535
 536     def change_theme(self, theme_name):
 537         """Change theme."""
 538         self.wallet.theme = self.theme_name = theme_name
 539         self.load_theme()
 540
 541     def set_configured_currency(self, set_quote_currency):
 542         """Set the inital fiat currency conversion country (USD/EUR/GBP) in
 543         the GUI to what it was set to in the wallet."""
 544         currency = self.wallet.conversion_currency
 545         # currency can be none when Electrum is used for the first
 546         # time and no setting has been created yet.
 547         if currency is not None:
 548             set_quote_currency(currency)
 549
 550     def set_config_currency(self, conversion_currency):
 551         """Change the wallet fiat currency country."""
 552         self.wallet.conversion_currency = conversion_currency
 553
 554     def set_servers_gui_stuff(self, servers_menu, servers_group):
 555         self.servers_menu = servers_menu
 556         self.servers_group = servers_group
 557
 558     def populate_servers_menu(self):
 559         interface = self.wallet.interface
 560         if not interface.servers:
 561             print "No servers loaded yet."
 562             self.servers_list = []
 563             for server_string in DEFAULT_SERVERS:
 564                 host, port, protocol = server_string.split(':')
 565                 transports = [(protocol,port)]
 566                 self.servers_list.append((host, transports))
 567         else:
 568             print "Servers loaded."
 569             self.servers_list = interface.servers
 570         server_names = [details[0] for details in self.servers_list]
 571         current_server = self.wallet.server.split(":")[0]
 572         for server_name in server_names:
 573             server_action = self.servers_menu.addAction(server_name)
 574             server_action.setCheckable(True)
 575             if server_name == current_server:
 576                 server_action.setChecked(True)
 577             class SelectServerFunctor:
 578                 def __init__(self, server_name, server_selected):
 579                     self.server_name = server_name
 580                     self.server_selected = server_selected
 581                 def __call__(self, checked):
 582                     if checked:
 583                         # call server_selected
 584                         self.server_selected(self.server_name)
 585             delegate = SelectServerFunctor(server_name, self.server_selected)
 586             server_action.toggled.connect(delegate)
 587             self.servers_group.addAction(server_action)
 588
 589     def update_servers_list(self):
 590         # Clear servers_group
 591         for action in self.servers_group.actions():
 592             self.servers_group.removeAction(action)
 593         self.populate_servers_menu()
 594
 595     def server_selected(self, server_name):
 596         match = [transports for (host, transports) in self.servers_list
 597                  if host == server_name]
 598         assert len(match) == 1
 599         match = match[0]
 600         # Default to TCP if available else use anything
 601         # TODO: protocol should be selectable.
 602         tcp_port = [port for (protocol, port) in match if protocol == "t"]
 603         if len(tcp_port) == 0:
 604             protocol = match[0][0]
 605             port = match[0][1]
 606         else:
 607             protocol = "t"
 608             port = tcp_port[0]
 609         server_line = "%s:%s:%s" % (server_name, port, protocol)
 610         # Should this have exception handling?
 611         self.wallet.set_server(server_line)
 612
 613     def copy_address(self, receive_popup):
 614         """Copy the wallet addresses into the client."""
 615         addrs = [addr for addr in self.wallet.all_addresses()
 616                  if not self.wallet.is_change(addr)]
 617         # Select most recent addresses from gap limit
 618         addrs = addrs[-self.wallet.gap_limit:]
 619         copied_address = random.choice(addrs)
 620         qApp.clipboard().setText(copied_address)
 621         receive_popup.setup(copied_address)
 622         receive_popup.popup()
 623
 624     def send(self, address, amount, parent_window):
 625         """Send bitcoins to the target address."""
 626         dest_address = self.fetch_destination(address)
 627
 628         if dest_address is None or not self.wallet.is_valid(dest_address):
 629             QMessageBox.warning(parent_window, _('Error'),
 630                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 631             return False
 632
 633         convert_amount = lambda amount: \
 634             int(D(unicode(amount)) * bitcoin(1))
 635         amount = convert_amount(amount)
 636
 637         if self.wallet.use_encryption:
 638             password_dialog = PasswordDialog(parent_window)
 639             password = password_dialog.run()
 640             if not password:
 641                 return
 642         else:
 643             password = None
 644
 645         fee = 0
 646         # 0.1 BTC = 10000000
 647         if amount < bitcoin(1) / 10:
 648             # 0.001 BTC
 649             fee = bitcoin(1) / 1000
 650
 651         try:
 652             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 653         except BaseException as error:
 654             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 655             return False
 656
 657         status, message = self.wallet.sendtx(tx)
 658         if not status:
 659             import tempfile
 660             dumpf = tempfile.NamedTemporaryFile(delete=False)
 661             dumpf.write(tx)
 662             dumpf.close()
 663             print "Dumped error tx to", dumpf.name
 664             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 665             return False
 666
 667         QMessageBox.information(parent_window, '',
 668             _('Payment sent.') + '\n' + message, _('OK'))
 669         return True
 670
 671     def fetch_destination(self, address):
 672         recipient = unicode(address).strip()
 673
 674         # alias
 675         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 676                           recipient)
 677
 678         # label or alias, with address in brackets
 679         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 680                           recipient)
 681
 682         if match1:
 683             dest_address = \
 684                 self.wallet.get_alias(recipient, True,
 685                                       self.show_message, self.question)
 686             return dest_address
 687         elif match2:
 688             return match2.group(2)
 689         else:
 690             return recipient
 691
 692     def is_valid(self, address):
 693         """Check if bitcoin address is valid."""
 694         return self.wallet.is_valid(address)
 695
 696     def acceptbit(self, currency):
 697         master_pubkey = self.wallet.master_public_key.encode("hex")
 698         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 699         webbrowser.open(url)
 700
 701     def show_seed_dialog(self):
 702         gui_qt.ElectrumWindow.show_seed_dialog(self.wallet)
 703
 704 class MiniDriver(QObject):
 705
 706     INITIALIZING = 0
 707     CONNECTING = 1
 708     SYNCHRONIZING = 2
 709     READY = 3
 710
 711     def __init__(self, wallet, window):
 712         super(QObject, self).__init__()
 713
 714         self.wallet = wallet
 715         self.window = window
 716
 717         self.wallet.register_callback(self.update_callback)
 718
 719         self.state = None
 720
 721         self.initializing()
 722         self.connect(self, SIGNAL("updatesignal()"), self.update)
 723         self.update_callback()
 724
 725     # This is a hack to workaround that Qt does not like changing the
 726     # window properties from this other thread before the runloop has
 727     # been called from.
 728     def update_callback(self):
 729         self.emit(SIGNAL("updatesignal()"))
 730
 731     def update(self):
 732         if not self.wallet.interface:
 733             self.initializing()
 734         elif not self.wallet.interface.is_connected:
 735             self.connecting()
 736         elif not self.wallet.blocks == -1:
 737             self.connecting()
 738         elif not self.wallet.is_up_to_date:
 739             self.synchronizing()
 740         else:
 741             self.ready()
 742
 743         if self.wallet.up_to_date:
 744             self.update_balance()
 745             self.update_completions()
 746             self.update_history()
 747
 748     def initializing(self):
 749         if self.state == self.INITIALIZING:
 750             return
 751         self.state = self.INITIALIZING
 752         self.window.deactivate()
 753
 754     def connecting(self):
 755         if self.state == self.CONNECTING:
 756             return
 757         self.state = self.CONNECTING
 758         self.window.deactivate()
 759
 760     def synchronizing(self):
 761         if self.state == self.SYNCHRONIZING:
 762             return
 763         self.state = self.SYNCHRONIZING
 764         self.window.deactivate()
 765
 766     def ready(self):
 767         if self.state == self.READY:
 768             return
 769         self.state = self.READY
 770         self.window.activate()
 771
 772     def update_balance(self):
 773         conf_balance, unconf_balance = self.wallet.get_balance()
 774         balance = D(conf_balance + unconf_balance)
 775         self.window.set_balances(balance)
 776
 777     def update_completions(self):
 778         completions = []
 779         for addr, label in self.wallet.labels.items():
 780             if addr in self.wallet.addressbook:
 781                 completions.append("%s <%s>" % (label, addr))
 782         completions = completions + self.wallet.aliases.keys()
 783         self.window.update_completions(completions)
 784
 785     def update_history(self):
 786         tx_history = self.wallet.get_tx_history()
 787         self.window.update_history(tx_history)
 788
 789 if __name__ == "__main__":
 790     app = QApplication(sys.argv)
 791     with open(rsrc("style.css")) as style_file:
 792         app.setStyleSheet(style_file.read())
 793     mini = MiniWindow()
 794     sys.exit(app.exec_())
 795