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 simple_config import SimpleConfig
   9 from util import get_resource_path as rsrc
  10 from i18n import _
  11 import decimal
  12 import exchange_rate
  13 import os.path
  14 import random
  15 import re
  16 import time
  17 import wallet
  18 import webbrowser
  19 import history_widget
  20 import util
  21
  22 import gui_qt
  23 import shutil
  24
  25 bitcoin = lambda v: v * 100000000
  26
  27 def IconButton(filename, parent=None):
  28     pixmap = QPixmap(filename)
  29     icon = QIcon(pixmap)
  30     return QPushButton(icon, "", parent)
  31
  32 class Timer(QThread):
  33     def run(self):
  34         while True:
  35             self.emit(SIGNAL('timersignal'))
  36             time.sleep(0.5)
  37
  38 def resize_line_edit_width(line_edit, text_input):
  39     metrics = QFontMetrics(qApp.font())
  40     # Create an extra character to add some space on the end
  41     text_input += "A"
  42     line_edit.setMinimumWidth(metrics.width(text_input))
  43
  44 class ElectrumGui(QObject):
  45
  46     def __init__(self, wallet):
  47         super(QObject, self).__init__()
  48
  49         self.wallet = wallet
  50         self.app = QApplication(sys.argv)
  51
  52     def main(self, url):
  53         actuator = MiniActuator(self.wallet)
  54         self.connect(self, SIGNAL("updateservers()"),
  55                      actuator.update_servers_list)
  56         # Should probably not modify the current path but instead
  57         # change the behaviour of rsrc(...)
  58         old_path = QDir.currentPath()
  59         actuator.load_theme()
  60
  61         self.mini = MiniWindow(actuator, self.expand)
  62         driver = MiniDriver(self.wallet, self.mini)
  63
  64         # Reset path back to original value now that loading the GUI
  65         # is completed.
  66         QDir.setCurrent(old_path)
  67
  68         if url:
  69             self.set_url(url)
  70
  71         timer = Timer()
  72         timer.start()
  73         self.expert = gui_qt.ElectrumWindow(self.wallet)
  74         self.expert.app = self.app
  75         self.expert.connect_slots(timer)
  76         self.expert.update_wallet()
  77
  78
  79         self.app.exec_()
  80
  81     def server_list_changed(self):
  82         self.emit(SIGNAL("updateservers()"))
  83
  84     def expand(self):
  85         """Hide the lite mode window and show pro-mode."""
  86         self.mini.hide()
  87         self.expert.show()
  88
  89     def set_url(self, url):
  90         payto, amount, label, message, signature, identity, url = \
  91             self.wallet.parse_url(url, self.show_message, self.show_question)
  92         self.mini.set_payment_fields(payto, amount)
  93
  94     def show_message(self, message):
  95         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
  96
  97     def show_question(self, message):
  98         choice = QMessageBox.question(self.mini, _("Message"), message,
  99                                       QMessageBox.Yes|QMessageBox.No,
 100                                       QMessageBox.No)
 101         return choice == QMessageBox.Yes
 102
 103     def restore_or_create(self):
 104         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 105         return qt_gui_object.restore_or_create()
 106
 107 class MiniWindow(QDialog):
 108
 109     def __init__(self, actuator, expand_callback):
 110         super(MiniWindow, self).__init__()
 111
 112         self.actuator = actuator
 113
 114         self.btc_balance = None
 115         self.quote_currencies = ["EUR", "USD", "GBP"]
 116         self.actuator.set_configured_currency(self.set_quote_currency)
 117         self.exchanger = exchange_rate.Exchanger(self)
 118         # Needed because price discovery is done in a different thread
 119         # which needs to be sent back to this main one to update the GUI
 120         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 121
 122         self.balance_label = BalanceLabel(self.change_quote_currency)
 123         self.balance_label.setObjectName("balance_label")
 124
 125         self.receive_button = QPushButton(_("&Receive"))
 126         self.receive_button.setObjectName("receive_button")
 127         self.receive_button.setDefault(True)
 128         self.receive_button.clicked.connect(self.copy_address)
 129
 130         # Bitcoin address code
 131         self.address_input = QLineEdit()
 132         self.address_input.setPlaceholderText(_("Enter a Bitcoin address..."))
 133         self.address_input.setObjectName("address_input")
 134
 135
 136         self.address_input.textEdited.connect(self.address_field_changed)
 137         resize_line_edit_width(self.address_input,
 138                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 139
 140         self.address_completions = QStringListModel()
 141         address_completer = QCompleter(self.address_input)
 142         address_completer.setCaseSensitivity(False)
 143         address_completer.setModel(self.address_completions)
 144         self.address_input.setCompleter(address_completer)
 145
 146         address_layout = QHBoxLayout()
 147         address_layout.addWidget(self.address_input)
 148
 149         self.amount_input = QLineEdit()
 150         self.amount_input.setPlaceholderText(_("... and amount"))
 151         self.amount_input.setObjectName("amount_input")
 152         # This is changed according to the user's displayed balance
 153         self.amount_validator = QDoubleValidator(self.amount_input)
 154         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 155         self.amount_validator.setDecimals(8)
 156         self.amount_input.setValidator(self.amount_validator)
 157
 158         # This removes the very ugly OSX highlighting, please leave this in :D
 159         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 160         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 161         self.amount_input.textChanged.connect(self.amount_input_changed)
 162
 163         self.send_button = QPushButton(_("&Send"))
 164         self.send_button.setObjectName("send_button")
 165         self.send_button.setDisabled(True);
 166         self.send_button.clicked.connect(self.send)
 167
 168         main_layout = QGridLayout(self)
 169
 170         main_layout.addWidget(self.balance_label, 0, 0)
 171         main_layout.addWidget(self.receive_button, 0, 1)
 172
 173         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 174
 175         main_layout.addWidget(self.amount_input, 2, 0)
 176         main_layout.addWidget(self.send_button, 2, 1)
 177
 178         self.history_list = history_widget.HistoryWidget()
 179         self.history_list.setObjectName("history")
 180         self.history_list.hide()
 181         self.history_list.setAlternatingRowColors(True)
 182         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 183
 184         menubar = QMenuBar()
 185         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 186
 187         servers_menu = electrum_menu.addMenu(_("&Servers"))
 188         servers_group = QActionGroup(self)
 189         self.actuator.set_servers_gui_stuff(servers_menu, servers_group)
 190         self.actuator.populate_servers_menu()
 191         electrum_menu.addSeparator()
 192
 193         brain_seed = electrum_menu.addAction(_("&BrainWallet Info"))
 194         brain_seed.triggered.connect(self.actuator.show_seed_dialog)
 195         quit_option = electrum_menu.addAction(_("&Quit"))
 196         quit_option.triggered.connect(self.close)
 197
 198         view_menu = menubar.addMenu(_("&View"))
 199         extra_menu = menubar.addMenu(_("&Extra"))
 200
 201         backup_wallet = extra_menu.addAction( _("&Create wallet backup"))
 202         backup_wallet.triggered.connect(self.backup_wallet)
 203
 204         expert_gui = view_menu.addAction(_("&Pro Mode"))
 205         expert_gui.triggered.connect(expand_callback)
 206         themes_menu = view_menu.addMenu(_("&Themes"))
 207         selected_theme = self.actuator.selected_theme()
 208         theme_group = QActionGroup(self)
 209         for theme_name in self.actuator.theme_names():
 210             theme_action = themes_menu.addAction(theme_name)
 211             theme_action.setCheckable(True)
 212             if selected_theme == theme_name:
 213                 theme_action.setChecked(True)
 214             class SelectThemeFunctor:
 215                 def __init__(self, theme_name, toggle_theme):
 216                     self.theme_name = theme_name
 217                     self.toggle_theme = toggle_theme
 218                 def __call__(self, checked):
 219                     if checked:
 220                         self.toggle_theme(self.theme_name)
 221             delegate = SelectThemeFunctor(theme_name, self.toggle_theme)
 222             theme_action.toggled.connect(delegate)
 223             theme_group.addAction(theme_action)
 224         view_menu.addSeparator()
 225         show_history = view_menu.addAction(_("Show History"))
 226         show_history.setCheckable(True)
 227         show_history.toggled.connect(self.show_history)
 228
 229         help_menu = menubar.addMenu(_("&Help"))
 230         the_website = help_menu.addAction(_("&Website"))
 231         the_website.triggered.connect(self.the_website)
 232         help_menu.addSeparator()
 233         report_bug = help_menu.addAction(_("&Report Bug"))
 234         report_bug.triggered.connect(self.show_report_bug)
 235         show_about = help_menu.addAction(_("&About"))
 236         show_about.triggered.connect(self.show_about)
 237         main_layout.setMenuBar(menubar)
 238
 239         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 240         quit_shortcut.activated.connect(self.close)
 241         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 242         close_shortcut.activated.connect(self.close)
 243
 244         self.cfg = SimpleConfig()
 245         g = self.cfg.config["winpos-lite"]
 246         self.setGeometry(g[0], g[1], g[2], g[3])
 247         show_history.setChecked(self.cfg.config["history"])
 248         self.show_history(self.cfg.config["history"])
 249
 250         self.setWindowIcon(QIcon(":electrum.png"))
 251         self.setWindowTitle("Electrum")
 252         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 253         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 254         self.setObjectName("main_window")
 255         self.show()
 256
 257     def toggle_theme(self, theme_name):
 258         old_path = QDir.currentPath()
 259         self.actuator.change_theme(theme_name)
 260         # Recompute style globally
 261         qApp.style().unpolish(self)
 262         qApp.style().polish(self)
 263         QDir.setCurrent(old_path)
 264
 265     def closeEvent(self, event):
 266         g = self.geometry()
 267         self.cfg.set_key("winpos-lite", [g.left(),g.top(),g.width(),g.height()])
 268         self.cfg.set_key("history", self.history_list.isVisible())
 269         self.cfg.save_config()
 270
 271         super(MiniWindow, self).closeEvent(event)
 272         qApp.quit()
 273
 274     def set_payment_fields(self, dest_address, amount):
 275         self.address_input.setText(dest_address)
 276         self.address_field_changed(dest_address)
 277         self.amount_input.setText(amount)
 278
 279     def activate(self):
 280         pass
 281
 282     def deactivate(self):
 283         pass
 284
 285     def set_quote_currency(self, currency):
 286         """Set and display the fiat currency country."""
 287         assert currency in self.quote_currencies
 288         self.quote_currencies.remove(currency)
 289         self.quote_currencies.insert(0, currency)
 290         self.refresh_balance()
 291
 292     def change_quote_currency(self):
 293         self.quote_currencies = \
 294             self.quote_currencies[1:] + self.quote_currencies[0:1]
 295         self.actuator.set_config_currency(self.quote_currencies[0])
 296         self.refresh_balance()
 297
 298     def refresh_balance(self):
 299         if self.btc_balance is None:
 300             # Price has been discovered before wallet has been loaded
 301             # and server connect... so bail.
 302             return
 303         self.set_balances(self.btc_balance)
 304         self.amount_input_changed(self.amount_input.text())
 305
 306     def set_balances(self, btc_balance):
 307         """Set the bitcoin balance and update the amount label accordingly."""
 308         self.btc_balance = btc_balance
 309         quote_text = self.create_quote_text(btc_balance)
 310         if quote_text:
 311             quote_text = "(%s)" % quote_text
 312         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 313         self.balance_label.set_balance_text(btc_balance, quote_text)
 314         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 315
 316     def amount_input_changed(self, amount_text):
 317         """Update the number of bitcoins displayed."""
 318         self.check_button_status()
 319
 320         try:
 321             amount = D(str(amount_text))
 322         except decimal.InvalidOperation:
 323             self.balance_label.show_balance()
 324         else:
 325             quote_text = self.create_quote_text(amount * bitcoin(1))
 326             if quote_text:
 327                 self.balance_label.set_amount_text(quote_text)
 328                 self.balance_label.show_amount()
 329             else:
 330                 self.balance_label.show_balance()
 331
 332     def create_quote_text(self, btc_balance):
 333         """Return a string copy of the amount fiat currency the
 334         user has in bitcoins."""
 335         quote_currency = self.quote_currencies[0]
 336         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 337         if quote_balance is None:
 338             quote_text = ""
 339         else:
 340             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 341                                       quote_currency)
 342         return quote_text
 343
 344     def send(self):
 345         if self.actuator.send(self.address_input.text(),
 346                               self.amount_input.text(), self):
 347             self.address_input.setText("")
 348             self.amount_input.setText("")
 349
 350     def check_button_status(self):
 351         """Check that the bitcoin address is valid and that something
 352         is entered in the amount before making the send button clickable."""
 353         try:
 354             value = D(str(self.amount_input.text())) * 10**8
 355         except decimal.InvalidOperation:
 356             value = None
 357         # self.address_input.property(...) returns a qVariant, not a bool.
 358         # The == is needed to properly invoke a comparison.
 359         if (self.address_input.property("isValid") == True and
 360             value is not None and 0 < value <= self.btc_balance):
 361             self.send_button.setDisabled(False)
 362         else:
 363             self.send_button.setDisabled(True)
 364
 365     def address_field_changed(self, address):
 366         if self.actuator.is_valid(address):
 367             self.check_button_status()
 368             self.address_input.setProperty("isValid", True)
 369             self.recompute_style(self.address_input)
 370         else:
 371             self.send_button.setDisabled(True)
 372             self.address_input.setProperty("isValid", False)
 373             self.recompute_style(self.address_input)
 374
 375         if len(address) == 0:
 376             self.address_input.setProperty("isValid", None)
 377             self.recompute_style(self.address_input)
 378
 379     def recompute_style(self, element):
 380         self.style().unpolish(element)
 381         self.style().polish(element)
 382
 383     def copy_address(self):
 384         receive_popup = ReceivePopup(self.receive_button)
 385         self.actuator.copy_address(receive_popup)
 386
 387     def update_completions(self, completions):
 388         self.address_completions.setStringList(completions)
 389
 390     def update_history(self, tx_history):
 391         for tx in tx_history[-10:]:
 392             address = tx["default_label"]
 393             amount = D(tx["value"]) / 10**8
 394             self.history_list.append(address, amount)
 395
 396     def acceptbit(self):
 397         self.actuator.acceptbit(self.quote_currencies[0])
 398
 399     def the_website(self):
 400         webbrowser.open("http://electrum-desktop.com")
 401
 402     def show_about(self):
 403         QMessageBox.about(self, "Electrum",
 404             _("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"))
 405
 406     def show_report_bug(self):
 407         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 408             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 409
 410     def show_history(self, toggle_state):
 411         if toggle_state:
 412             self.history_list.show()
 413         else:
 414             self.history_list.hide()
 415
 416     def backup_wallet(self):
 417         try:
 418           folderName = QFileDialog.getExistingDirectory(QWidget(), 'Select folder to save a copy of your wallet to', os.path.expanduser('~/'))
 419           if folderName:
 420             sourceFile = util.user_dir() + '/electrum.dat'
 421             shutil.copy2(sourceFile, str(folderName))
 422             QMessageBox.information(None,"Wallet backup created", "A copy of your wallet file was created in '%s'" % str(folderName))
 423         except (IOError, os.error), reason:
 424           QMessageBox.critical(None,"Unable to create backup", "Electrum was unable copy your wallet file to the specified location.\n" + str(reason))
 425
 426
 427
 428
 429 class BalanceLabel(QLabel):
 430
 431     SHOW_CONNECTING = 1
 432     SHOW_BALANCE = 2
 433     SHOW_AMOUNT = 3
 434
 435     def __init__(self, change_quote_currency, parent=None):
 436         super(QLabel, self).__init__(_("Connecting..."), parent)
 437         self.change_quote_currency = change_quote_currency
 438         self.state = self.SHOW_CONNECTING
 439         self.balance_text = ""
 440         self.amount_text = ""
 441
 442     def mousePressEvent(self, event):
 443         """Change the fiat currency selection if window background is clicked."""
 444         if self.state != self.SHOW_CONNECTING:
 445             self.change_quote_currency()
 446
 447     def set_balance_text(self, btc_balance, quote_text):
 448         """Set the amount of bitcoins in the gui."""
 449         if self.state == self.SHOW_CONNECTING:
 450             self.state = self.SHOW_BALANCE
 451         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)
 452         if self.state == self.SHOW_BALANCE:
 453             self.setText(self.balance_text)
 454
 455     def set_amount_text(self, quote_text):
 456         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 457         if self.state == self.SHOW_AMOUNT:
 458             self.setText(self.amount_text)
 459
 460     def show_balance(self):
 461         if self.state == self.SHOW_AMOUNT:
 462             self.state = self.SHOW_BALANCE
 463             self.setText(self.balance_text)
 464
 465     def show_amount(self):
 466         if self.state == self.SHOW_BALANCE:
 467             self.state = self.SHOW_AMOUNT
 468             self.setText(self.amount_text)
 469
 470 def ok_cancel_buttons(dialog):
 471     row_layout = QHBoxLayout()
 472     row_layout.addStretch(1)
 473     ok_button = QPushButton(_("OK"))
 474     row_layout.addWidget(ok_button)
 475     ok_button.clicked.connect(dialog.accept)
 476     cancel_button = QPushButton(_("Cancel"))
 477     row_layout.addWidget(cancel_button)
 478     cancel_button.clicked.connect(dialog.reject)
 479     return row_layout
 480
 481 class PasswordDialog(QDialog):
 482
 483     def __init__(self, parent):
 484         super(QDialog, self).__init__(parent)
 485
 486         self.setModal(True)
 487
 488         self.password_input = QLineEdit()
 489         self.password_input.setEchoMode(QLineEdit.Password)
 490
 491         main_layout = QVBoxLayout(self)
 492         message = _('Please enter your password')
 493         main_layout.addWidget(QLabel(message))
 494
 495         grid = QGridLayout()
 496         grid.setSpacing(8)
 497         grid.addWidget(QLabel(_('Password')), 1, 0)
 498         grid.addWidget(self.password_input, 1, 1)
 499         main_layout.addLayout(grid)
 500
 501         main_layout.addLayout(ok_cancel_buttons(self))
 502         self.setLayout(main_layout)
 503
 504     def run(self):
 505         if not self.exec_():
 506             return
 507         return unicode(self.password_input.text())
 508
 509 class ReceivePopup(QDialog):
 510
 511     def leaveEvent(self, event):
 512         self.close()
 513
 514     def setup(self, address):
 515         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 516         address_display = QLineEdit(address)
 517         address_display.setReadOnly(True)
 518         resize_line_edit_width(address_display, address)
 519
 520         main_layout = QVBoxLayout(self)
 521         main_layout.addWidget(label)
 522         main_layout.addWidget(address_display)
 523
 524         self.setMouseTracking(True)
 525         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 526         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|
 527                             Qt.MSWindowsFixedSizeDialogHint)
 528         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 529         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 530         #self.setAlignment(Qt.AlignCenter)
 531
 532     def popup(self):
 533         parent = self.parent()
 534         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 535         self.move(top_left_pos)
 536         center_mouse_pos = self.mapToGlobal(self.rect().center())
 537         QCursor.setPos(center_mouse_pos)
 538         self.show()
 539
 540 class MiniActuator:
 541     """Initialize the definitions relating to themes and
 542     sending/recieving bitcoins."""
 543
 544
 545     def __init__(self, wallet):
 546         """Retrieve the gui theme used in previous session."""
 547         self.wallet = wallet
 548         self.theme_name = self.wallet.theme
 549         self.themes = util.load_theme_paths()
 550
 551     def load_theme(self):
 552         """Load theme retrieved from wallet file."""
 553         try:
 554             theme_prefix, theme_path = self.themes[self.theme_name]
 555         except KeyError:
 556             util.print_error("Theme not found!", self.theme_name)
 557             return
 558         QDir.setCurrent(os.path.join(theme_prefix, theme_path))
 559         with open(rsrc("style.css")) as style_file:
 560             qApp.setStyleSheet(style_file.read())
 561
 562     def theme_names(self):
 563         """Sort themes."""
 564         return sorted(self.themes.keys())
 565
 566     def selected_theme(self):
 567         """Select theme."""
 568         return self.theme_name
 569
 570     def change_theme(self, theme_name):
 571         """Change theme."""
 572         self.wallet.theme = self.theme_name = theme_name
 573         self.load_theme()
 574
 575     def set_configured_currency(self, set_quote_currency):
 576         """Set the inital fiat currency conversion country (USD/EUR/GBP) in
 577         the GUI to what it was set to in the wallet."""
 578         currency = self.wallet.conversion_currency
 579         # currency can be none when Electrum is used for the first
 580         # time and no setting has been created yet.
 581         if currency is not None:
 582             set_quote_currency(currency)
 583
 584     def set_config_currency(self, conversion_currency):
 585         """Change the wallet fiat currency country."""
 586         self.wallet.conversion_currency = conversion_currency
 587
 588     def set_servers_gui_stuff(self, servers_menu, servers_group):
 589         self.servers_menu = servers_menu
 590         self.servers_group = servers_group
 591
 592     def populate_servers_menu(self):
 593         interface = self.wallet.interface
 594         if not interface.servers:
 595             print "No servers loaded yet."
 596             self.servers_list = []
 597             for server_string in DEFAULT_SERVERS:
 598                 host, port, protocol = server_string.split(':')
 599                 transports = [(protocol,port)]
 600                 self.servers_list.append((host, transports))
 601         else:
 602             print "Servers loaded."
 603             self.servers_list = interface.servers
 604         server_names = [details[0] for details in self.servers_list]
 605         current_server = self.wallet.server.split(":")[0]
 606         for server_name in server_names:
 607             server_action = self.servers_menu.addAction(server_name)
 608             server_action.setCheckable(True)
 609             if server_name == current_server:
 610                 server_action.setChecked(True)
 611             class SelectServerFunctor:
 612                 def __init__(self, server_name, server_selected):
 613                     self.server_name = server_name
 614                     self.server_selected = server_selected
 615                 def __call__(self, checked):
 616                     if checked:
 617                         # call server_selected
 618                         self.server_selected(self.server_name)
 619             delegate = SelectServerFunctor(server_name, self.server_selected)
 620             server_action.toggled.connect(delegate)
 621             self.servers_group.addAction(server_action)
 622
 623     def update_servers_list(self):
 624         # Clear servers_group
 625         for action in self.servers_group.actions():
 626             self.servers_group.removeAction(action)
 627         self.populate_servers_menu()
 628
 629     def server_selected(self, server_name):
 630         match = [transports for (host, transports) in self.servers_list
 631                  if host == server_name]
 632         assert len(match) == 1
 633         match = match[0]
 634         # Default to TCP if available else use anything
 635         # TODO: protocol should be selectable.
 636         tcp_port = [port for (protocol, port) in match if protocol == "t"]
 637         if len(tcp_port) == 0:
 638             protocol = match[0][0]
 639             port = match[0][1]
 640         else:
 641             protocol = "t"
 642             port = tcp_port[0]
 643         server_line = "%s:%s:%s" % (server_name, port, protocol)
 644
 645         # Should this have exception handling?
 646         self.cfg = SimpleConfig()
 647         self.wallet.set_server(server_line, self.cfg.config["proxy"])
 648
 649     def copy_address(self, receive_popup):
 650         """Copy the wallet addresses into the client."""
 651         addrs = [addr for addr in self.wallet.all_addresses()
 652                  if not self.wallet.is_change(addr)]
 653         # Select most recent addresses from gap limit
 654         addrs = addrs[-self.wallet.gap_limit:]
 655         copied_address = random.choice(addrs)
 656         qApp.clipboard().setText(copied_address)
 657         receive_popup.setup(copied_address)
 658         receive_popup.popup()
 659
 660     def send(self, address, amount, parent_window):
 661         """Send bitcoins to the target address."""
 662         dest_address = self.fetch_destination(address)
 663
 664         if dest_address is None or not self.wallet.is_valid(dest_address):
 665             QMessageBox.warning(parent_window, _('Error'),
 666                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 667             return False
 668
 669         convert_amount = lambda amount: \
 670             int(D(unicode(amount)) * bitcoin(1))
 671         amount = convert_amount(amount)
 672
 673         if self.wallet.use_encryption:
 674             password_dialog = PasswordDialog(parent_window)
 675             password = password_dialog.run()
 676             if not password:
 677                 return
 678         else:
 679             password = None
 680
 681         fee = 0
 682         # 0.1 BTC = 10000000
 683         if amount < bitcoin(1) / 10:
 684             # 0.001 BTC
 685             fee = bitcoin(1) / 1000
 686
 687         try:
 688             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 689         except BaseException as error:
 690             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 691             return False
 692
 693         status, message = self.wallet.sendtx(tx)
 694         if not status:
 695             import tempfile
 696             dumpf = tempfile.NamedTemporaryFile(delete=False)
 697             dumpf.write(tx)
 698             dumpf.close()
 699             print "Dumped error tx to", dumpf.name
 700             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 701             return False
 702
 703         QMessageBox.information(parent_window, '',
 704             _('Payment sent.') + '\n' + message, _('OK'))
 705         return True
 706
 707     def fetch_destination(self, address):
 708         recipient = unicode(address).strip()
 709
 710         # alias
 711         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 712                           recipient)
 713
 714         # label or alias, with address in brackets
 715         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 716                           recipient)
 717
 718         if match1:
 719             dest_address = \
 720                 self.wallet.get_alias(recipient, True,
 721                                       self.show_message, self.question)
 722             return dest_address
 723         elif match2:
 724             return match2.group(2)
 725         else:
 726             return recipient
 727
 728     def is_valid(self, address):
 729         """Check if bitcoin address is valid."""
 730         return self.wallet.is_valid(address)
 731
 732     def acceptbit(self, currency):
 733         master_pubkey = self.wallet.master_public_key.encode("hex")
 734         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 735         webbrowser.open(url)
 736
 737     def show_seed_dialog(self):
 738         gui_qt.ElectrumWindow.show_seed_dialog(self.wallet)
 739
 740 class MiniDriver(QObject):
 741
 742     INITIALIZING = 0
 743     CONNECTING = 1
 744     SYNCHRONIZING = 2
 745     READY = 3
 746
 747     def __init__(self, wallet, window):
 748         super(QObject, self).__init__()
 749
 750         self.wallet = wallet
 751         self.window = window
 752
 753         self.wallet.register_callback(self.update_callback)
 754
 755         self.state = None
 756
 757         self.initializing()
 758         self.connect(self, SIGNAL("updatesignal()"), self.update)
 759         self.update_callback()
 760
 761     # This is a hack to workaround that Qt does not like changing the
 762     # window properties from this other thread before the runloop has
 763     # been called from.
 764     def update_callback(self):
 765         self.emit(SIGNAL("updatesignal()"))
 766
 767     def update(self):
 768         if not self.wallet.interface:
 769             self.initializing()
 770         elif not self.wallet.interface.is_connected:
 771             self.connecting()
 772         elif not self.wallet.blocks == -1:
 773             self.connecting()
 774         elif not self.wallet.is_up_to_date:
 775             self.synchronizing()
 776         else:
 777             self.ready()
 778
 779         if self.wallet.up_to_date:
 780             self.update_balance()
 781             self.update_completions()
 782             self.update_history()
 783
 784     def initializing(self):
 785         if self.state == self.INITIALIZING:
 786             return
 787         self.state = self.INITIALIZING
 788         self.window.deactivate()
 789
 790     def connecting(self):
 791         if self.state == self.CONNECTING:
 792             return
 793         self.state = self.CONNECTING
 794         self.window.deactivate()
 795
 796     def synchronizing(self):
 797         if self.state == self.SYNCHRONIZING:
 798             return
 799         self.state = self.SYNCHRONIZING
 800         self.window.deactivate()
 801
 802     def ready(self):
 803         if self.state == self.READY:
 804             return
 805         self.state = self.READY
 806         self.window.activate()
 807
 808     def update_balance(self):
 809         conf_balance, unconf_balance = self.wallet.get_balance()
 810         balance = D(conf_balance + unconf_balance)
 811         self.window.set_balances(balance)
 812
 813     def update_completions(self):
 814         completions = []
 815         for addr, label in self.wallet.labels.items():
 816             if addr in self.wallet.addressbook:
 817                 completions.append("%s <%s>" % (label, addr))
 818         completions = completions + self.wallet.aliases.keys()
 819         self.window.update_completions(completions)
 820
 821     def update_history(self):
 822         tx_history = self.wallet.get_tx_history()
 823         self.window.update_history(tx_history)
 824
 825 if __name__ == "__main__":
 826     app = QApplication(sys.argv)
 827     with open(rsrc("style.css")) as style_file:
 828         app.setStyleSheet(style_file.read())
 829     mini = MiniWindow()
 830     sys.exit(app.exec_())
 831