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