lib/gui_lite.py

   1 import sys
   2
   3 # Let's do some dep checking and handle missing ones gracefully
   4 try:
   5     from PyQt4.QtCore import *
   6     from PyQt4.QtGui import *
   7     import PyQt4.QtCore as QtCore
   8
   9 except ImportError:
  10     print "You need to have PyQT installed to run Electrum in graphical mode."
  11     print "If you have pip installed try 'sudo pip install pyqt' if you are on Debian/Ubuntu try 'sudo apt-get install python-qt4'."
  12     sys.exit(0)
  13
  14
  15
  16
  17 from decimal import Decimal as D
  18 from util import get_resource_path as rsrc
  19 from i18n import _
  20 import decimal
  21 import exchange_rate
  22 import os.path
  23 import random
  24 import re
  25 import time
  26 import wallet
  27 import webbrowser
  28 import history_widget
  29 import util
  30
  31 import gui_qt
  32 import shutil
  33
  34 bitcoin = lambda v: v * 100000000
  35
  36 def IconButton(filename, parent=None):
  37     pixmap = QPixmap(filename)
  38     icon = QIcon(pixmap)
  39     return QPushButton(icon, "", parent)
  40
  41 class Timer(QThread):
  42     def run(self):
  43         while True:
  44             self.emit(SIGNAL('timersignal'))
  45             time.sleep(0.5)
  46
  47 def resize_line_edit_width(line_edit, text_input):
  48     metrics = QFontMetrics(qApp.font())
  49     # Create an extra character to add some space on the end
  50     text_input += "A"
  51     line_edit.setMinimumWidth(metrics.width(text_input))
  52
  53 def load_theme_name(theme_path):
  54     try:
  55         with open(os.path.join(theme_path, "name.cfg")) as name_cfg_file:
  56             return name_cfg_file.read().rstrip("\n").strip()
  57     except IOError:
  58         return None
  59
  60
  61 def theme_dirs_from_prefix(prefix):
  62     if not os.path.exists(prefix):
  63         return []
  64     theme_paths = {}
  65     for potential_theme in os.listdir(prefix):
  66         theme_full_path = os.path.join(prefix, potential_theme)
  67         theme_css = os.path.join(theme_full_path, "style.css")
  68         if not os.path.exists(theme_css):
  69             continue
  70         theme_name = load_theme_name(theme_full_path)
  71         if theme_name is None:
  72             continue
  73         theme_paths[theme_name] = prefix, potential_theme
  74     return theme_paths
  75
  76 def load_theme_paths():
  77     theme_paths = {}
  78     prefixes = (util.local_data_dir(), util.appdata_dir())
  79     for prefix in prefixes:
  80         theme_paths.update(theme_dirs_from_prefix(prefix))
  81     return theme_paths
  82
  83
  84 class ElectrumGui(QObject):
  85
  86     def __init__(self, wallet, config):
  87         super(QObject, self).__init__()
  88
  89         self.wallet = wallet
  90         self.config = config
  91         self.check_qt_version()
  92         self.app = QApplication(sys.argv)
  93
  94
  95     def check_qt_version(self):
  96         qtVersion = qVersion()
  97         if not(int(qtVersion[0]) >= 4 and int(qtVersion[2]) >= 7):
  98             app = QApplication(sys.argv)
  99             QMessageBox.warning(None,"Could not start Lite GUI.", "Electrum was unable to load the 'Lite GUI' because it needs Qt version >= 4.7.\nChanging your config to use the 'Classic' GUI")
 100             self.config.set_key('gui','classic',True)
 101             sys.exit(0)
 102
 103
 104     def main(self, url):
 105         actuator = MiniActuator(self.wallet)
 106         # Should probably not modify the current path but instead
 107         # change the behaviour of rsrc(...)
 108         old_path = QDir.currentPath()
 109         actuator.load_theme()
 110
 111         self.mini = MiniWindow(actuator, self.expand, self.config)
 112         driver = MiniDriver(self.wallet, self.mini)
 113
 114         # Reset path back to original value now that loading the GUI
 115         # is completed.
 116         QDir.setCurrent(old_path)
 117
 118         if url:
 119             self.set_url(url)
 120
 121         timer = Timer()
 122         timer.start()
 123         self.expert = gui_qt.ElectrumWindow(self.wallet, self.config)
 124         self.expert.app = self.app
 125         self.expert.connect_slots(timer)
 126         self.expert.update_wallet()
 127         self.app.exec_()
 128
 129     def expand(self):
 130         """Hide the lite mode window and show pro-mode."""
 131         self.mini.hide()
 132         self.expert.show()
 133
 134     def set_url(self, url):
 135         payto, amount, label, message, signature, identity, url = \
 136             self.wallet.parse_url(url, self.show_message, self.show_question)
 137         self.mini.set_payment_fields(payto, amount)
 138
 139     def show_message(self, message):
 140         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
 141
 142     def show_question(self, message):
 143         choice = QMessageBox.question(self.mini, _("Message"), message,
 144                                       QMessageBox.Yes|QMessageBox.No,
 145                                       QMessageBox.No)
 146         return choice == QMessageBox.Yes
 147
 148     def restore_or_create(self):
 149         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 150         return qt_gui_object.restore_or_create()
 151
 152 class MiniWindow(QDialog):
 153
 154     def __init__(self, actuator, expand_callback, config):
 155         super(MiniWindow, self).__init__()
 156
 157         self.actuator = actuator
 158         self.config = config
 159
 160         self.btc_balance = None
 161         self.quote_currencies = ["EUR", "USD", "GBP"]
 162         self.actuator.set_configured_currency(self.set_quote_currency)
 163         self.exchanger = exchange_rate.Exchanger(self)
 164         # Needed because price discovery is done in a different thread
 165         # which needs to be sent back to this main one to update the GUI
 166         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 167
 168         self.balance_label = BalanceLabel(self.change_quote_currency)
 169         self.balance_label.setObjectName("balance_label")
 170
 171         self.receive_button = QPushButton(_("&Receive"))
 172         self.receive_button.setObjectName("receive_button")
 173         self.receive_button.setDefault(True)
 174         self.receive_button.clicked.connect(self.copy_address)
 175
 176         # Bitcoin address code
 177         self.address_input = QLineEdit()
 178         self.address_input.setPlaceholderText(_("Enter a Bitcoin address..."))
 179         self.address_input.setObjectName("address_input")
 180
 181
 182         self.address_input.textEdited.connect(self.address_field_changed)
 183         resize_line_edit_width(self.address_input,
 184                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 185
 186         self.address_completions = QStringListModel()
 187         address_completer = QCompleter(self.address_input)
 188         address_completer.setCaseSensitivity(False)
 189         address_completer.setModel(self.address_completions)
 190         self.address_input.setCompleter(address_completer)
 191
 192         address_layout = QHBoxLayout()
 193         address_layout.addWidget(self.address_input)
 194
 195         self.amount_input = QLineEdit()
 196         self.amount_input.setPlaceholderText(_("... and amount"))
 197         self.amount_input.setObjectName("amount_input")
 198         # This is changed according to the user's displayed balance
 199         self.amount_validator = QDoubleValidator(self.amount_input)
 200         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 201         self.amount_validator.setDecimals(8)
 202         self.amount_input.setValidator(self.amount_validator)
 203
 204         # This removes the very ugly OSX highlighting, please leave this in :D
 205         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 206         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 207         self.amount_input.textChanged.connect(self.amount_input_changed)
 208
 209         self.send_button = QPushButton(_("&Send"))
 210         self.send_button.setObjectName("send_button")
 211         self.send_button.setDisabled(True);
 212         self.send_button.clicked.connect(self.send)
 213
 214         main_layout = QGridLayout(self)
 215
 216         main_layout.addWidget(self.balance_label, 0, 0)
 217         main_layout.addWidget(self.receive_button, 0, 1)
 218
 219         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 220
 221         main_layout.addWidget(self.amount_input, 2, 0)
 222         main_layout.addWidget(self.send_button, 2, 1)
 223
 224         self.history_list = history_widget.HistoryWidget()
 225         self.history_list.setObjectName("history")
 226         self.history_list.hide()
 227         self.history_list.setAlternatingRowColors(True)
 228         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 229
 230         menubar = QMenuBar()
 231         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 232
 233         electrum_menu.addSeparator()
 234
 235         brain_seed = electrum_menu.addAction(_("&BrainWallet Info"))
 236         brain_seed.triggered.connect(self.actuator.show_seed_dialog)
 237         quit_option = electrum_menu.addAction(_("&Quit"))
 238         quit_option.triggered.connect(self.close)
 239
 240         view_menu = menubar.addMenu(_("&View"))
 241         extra_menu = menubar.addMenu(_("&Extra"))
 242
 243         backup_wallet = extra_menu.addAction( _("&Create wallet backup"))
 244         backup_wallet.triggered.connect(self.backup_wallet)
 245
 246         expert_gui = view_menu.addAction(_("&Classic GUI"))
 247         expert_gui.triggered.connect(expand_callback)
 248         themes_menu = view_menu.addMenu(_("&Themes"))
 249         selected_theme = self.actuator.selected_theme()
 250         theme_group = QActionGroup(self)
 251         for theme_name in self.actuator.theme_names():
 252             theme_action = themes_menu.addAction(theme_name)
 253             theme_action.setCheckable(True)
 254             if selected_theme == theme_name:
 255                 theme_action.setChecked(True)
 256             class SelectThemeFunctor:
 257                 def __init__(self, theme_name, toggle_theme):
 258                     self.theme_name = theme_name
 259                     self.toggle_theme = toggle_theme
 260                 def __call__(self, checked):
 261                     if checked:
 262                         self.toggle_theme(self.theme_name)
 263             delegate = SelectThemeFunctor(theme_name, self.toggle_theme)
 264             theme_action.toggled.connect(delegate)
 265             theme_group.addAction(theme_action)
 266         view_menu.addSeparator()
 267         show_history = view_menu.addAction(_("Show History"))
 268         show_history.setCheckable(True)
 269         show_history.toggled.connect(self.show_history)
 270
 271         help_menu = menubar.addMenu(_("&Help"))
 272         the_website = help_menu.addAction(_("&Website"))
 273         the_website.triggered.connect(self.the_website)
 274         help_menu.addSeparator()
 275         report_bug = help_menu.addAction(_("&Report Bug"))
 276         report_bug.triggered.connect(self.show_report_bug)
 277         show_about = help_menu.addAction(_("&About"))
 278         show_about.triggered.connect(self.show_about)
 279         main_layout.setMenuBar(menubar)
 280
 281         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 282         quit_shortcut.activated.connect(self.close)
 283         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 284         close_shortcut.activated.connect(self.close)
 285
 286         g = self.config.get("winpos-lite",[4, 25, 351, 149])
 287         self.setGeometry(g[0], g[1], g[2], g[3])
 288
 289         show_hist = self.config.get("gui_show_history",False)
 290         show_history.setChecked(show_hist)
 291         self.show_history(show_hist)
 292
 293         self.setWindowIcon(QIcon(":electrum.png"))
 294         self.setWindowTitle("Electrum")
 295         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 296         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 297         self.setObjectName("main_window")
 298         self.show()
 299
 300     def toggle_theme(self, theme_name):
 301         old_path = QDir.currentPath()
 302         self.actuator.change_theme(theme_name)
 303         # Recompute style globally
 304         qApp.style().unpolish(self)
 305         qApp.style().polish(self)
 306         QDir.setCurrent(old_path)
 307
 308     def closeEvent(self, event):
 309         g = self.geometry()
 310         self.config.set_key("winpos-lite", [g.left(),g.top(),g.width(),g.height()],True)
 311         self.config.set_key("gui_show_history", self.history_list.isVisible(),True)
 312
 313         super(MiniWindow, self).closeEvent(event)
 314         qApp.quit()
 315
 316     def set_payment_fields(self, dest_address, amount):
 317         self.address_input.setText(dest_address)
 318         self.address_field_changed(dest_address)
 319         self.amount_input.setText(amount)
 320
 321     def activate(self):
 322         pass
 323
 324     def deactivate(self):
 325         pass
 326
 327     def set_quote_currency(self, currency):
 328         """Set and display the fiat currency country."""
 329         assert currency in self.quote_currencies
 330         self.quote_currencies.remove(currency)
 331         self.quote_currencies.insert(0, currency)
 332         self.refresh_balance()
 333
 334     def change_quote_currency(self):
 335         self.quote_currencies = \
 336             self.quote_currencies[1:] + self.quote_currencies[0:1]
 337         self.actuator.set_config_currency(self.quote_currencies[0])
 338         self.refresh_balance()
 339
 340     def refresh_balance(self):
 341         if self.btc_balance is None:
 342             # Price has been discovered before wallet has been loaded
 343             # and server connect... so bail.
 344             return
 345         self.set_balances(self.btc_balance)
 346         self.amount_input_changed(self.amount_input.text())
 347
 348     def set_balances(self, btc_balance):
 349         """Set the bitcoin balance and update the amount label accordingly."""
 350         self.btc_balance = btc_balance
 351         quote_text = self.create_quote_text(btc_balance)
 352         if quote_text:
 353             quote_text = "(%s)" % quote_text
 354         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 355         self.balance_label.set_balance_text(btc_balance, quote_text)
 356         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 357
 358     def amount_input_changed(self, amount_text):
 359         """Update the number of bitcoins displayed."""
 360         self.check_button_status()
 361
 362         try:
 363             amount = D(str(amount_text))
 364         except decimal.InvalidOperation:
 365             self.balance_label.show_balance()
 366         else:
 367             quote_text = self.create_quote_text(amount * bitcoin(1))
 368             if quote_text:
 369                 self.balance_label.set_amount_text(quote_text)
 370                 self.balance_label.show_amount()
 371             else:
 372                 self.balance_label.show_balance()
 373
 374     def create_quote_text(self, btc_balance):
 375         """Return a string copy of the amount fiat currency the
 376         user has in bitcoins."""
 377         quote_currency = self.quote_currencies[0]
 378         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 379         if quote_balance is None:
 380             quote_text = ""
 381         else:
 382             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 383                                       quote_currency)
 384         return quote_text
 385
 386     def send(self):
 387         if self.actuator.send(self.address_input.text(),
 388                               self.amount_input.text(), self):
 389             self.address_input.setText("")
 390             self.amount_input.setText("")
 391
 392     def check_button_status(self):
 393         """Check that the bitcoin address is valid and that something
 394         is entered in the amount before making the send button clickable."""
 395         try:
 396             value = D(str(self.amount_input.text())) * 10**8
 397         except decimal.InvalidOperation:
 398             value = None
 399         # self.address_input.property(...) returns a qVariant, not a bool.
 400         # The == is needed to properly invoke a comparison.
 401         if (self.address_input.property("isValid") == True and
 402             value is not None and 0 < value <= self.btc_balance):
 403             self.send_button.setDisabled(False)
 404         else:
 405             self.send_button.setDisabled(True)
 406
 407     def address_field_changed(self, address):
 408         if self.actuator.is_valid(address):
 409             self.check_button_status()
 410             self.address_input.setProperty("isValid", True)
 411             self.recompute_style(self.address_input)
 412         else:
 413             self.send_button.setDisabled(True)
 414             self.address_input.setProperty("isValid", False)
 415             self.recompute_style(self.address_input)
 416
 417         if len(address) == 0:
 418             self.address_input.setProperty("isValid", None)
 419             self.recompute_style(self.address_input)
 420
 421     def recompute_style(self, element):
 422         self.style().unpolish(element)
 423         self.style().polish(element)
 424
 425     def copy_address(self):
 426         receive_popup = ReceivePopup(self.receive_button)
 427         self.actuator.copy_address(receive_popup)
 428
 429     def update_completions(self, completions):
 430         self.address_completions.setStringList(completions)
 431
 432     def update_history(self, tx_history):
 433         from util import format_satoshis
 434         for item in tx_history[-10:]:
 435             tx_hash, conf, is_mine, value, fee, balance, timestamp = item
 436             label = self.actuator.wallet.get_label(tx_hash)[0]
 437             #amount = D(value) / 10**8
 438             v_str = format_satoshis(value, True)
 439             self.history_list.append(label, v_str)
 440
 441     def acceptbit(self):
 442         self.actuator.acceptbit(self.quote_currencies[0])
 443
 444     def the_website(self):
 445         webbrowser.open("http://electrum-desktop.com")
 446
 447     def show_about(self):
 448         QMessageBox.about(self, "Electrum",
 449             _("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"))
 450
 451     def show_report_bug(self):
 452         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 453             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 454
 455     def show_history(self, toggle_state):
 456         if toggle_state:
 457             self.history_list.show()
 458         else:
 459             self.history_list.hide()
 460
 461     def backup_wallet(self):
 462         try:
 463           folderName = QFileDialog.getExistingDirectory(QWidget(), 'Select folder to save a copy of your wallet to', os.path.expanduser('~/'))
 464           if folderName:
 465             sourceFile = util.user_dir() + '/electrum.dat'
 466             shutil.copy2(sourceFile, str(folderName))
 467             QMessageBox.information(None,"Wallet backup created", "A copy of your wallet file was created in '%s'" % str(folderName))
 468         except (IOError, os.error), reason:
 469           QMessageBox.critical(None,"Unable to create backup", "Electrum was unable copy your wallet file to the specified location.\n" + str(reason))
 470
 471
 472
 473
 474 class BalanceLabel(QLabel):
 475
 476     SHOW_CONNECTING = 1
 477     SHOW_BALANCE = 2
 478     SHOW_AMOUNT = 3
 479
 480     def __init__(self, change_quote_currency, parent=None):
 481         super(QLabel, self).__init__(_("Connecting..."), parent)
 482         self.change_quote_currency = change_quote_currency
 483         self.state = self.SHOW_CONNECTING
 484         self.balance_text = ""
 485         self.amount_text = ""
 486
 487     def mousePressEvent(self, event):
 488         """Change the fiat currency selection if window background is clicked."""
 489         if self.state != self.SHOW_CONNECTING:
 490             self.change_quote_currency()
 491
 492     def set_balance_text(self, btc_balance, quote_text):
 493         """Set the amount of bitcoins in the gui."""
 494         if self.state == self.SHOW_CONNECTING:
 495             self.state = self.SHOW_BALANCE
 496         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)
 497         if self.state == self.SHOW_BALANCE:
 498             self.setText(self.balance_text)
 499
 500     def set_amount_text(self, quote_text):
 501         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 502         if self.state == self.SHOW_AMOUNT:
 503             self.setText(self.amount_text)
 504
 505     def show_balance(self):
 506         if self.state == self.SHOW_AMOUNT:
 507             self.state = self.SHOW_BALANCE
 508             self.setText(self.balance_text)
 509
 510     def show_amount(self):
 511         if self.state == self.SHOW_BALANCE:
 512             self.state = self.SHOW_AMOUNT
 513             self.setText(self.amount_text)
 514
 515 def ok_cancel_buttons(dialog):
 516     row_layout = QHBoxLayout()
 517     row_layout.addStretch(1)
 518     ok_button = QPushButton(_("OK"))
 519     row_layout.addWidget(ok_button)
 520     ok_button.clicked.connect(dialog.accept)
 521     cancel_button = QPushButton(_("Cancel"))
 522     row_layout.addWidget(cancel_button)
 523     cancel_button.clicked.connect(dialog.reject)
 524     return row_layout
 525
 526 class PasswordDialog(QDialog):
 527
 528     def __init__(self, parent):
 529         super(QDialog, self).__init__(parent)
 530
 531         self.setModal(True)
 532
 533         self.password_input = QLineEdit()
 534         self.password_input.setEchoMode(QLineEdit.Password)
 535
 536         main_layout = QVBoxLayout(self)
 537         message = _('Please enter your password')
 538         main_layout.addWidget(QLabel(message))
 539
 540         grid = QGridLayout()
 541         grid.setSpacing(8)
 542         grid.addWidget(QLabel(_('Password')), 1, 0)
 543         grid.addWidget(self.password_input, 1, 1)
 544         main_layout.addLayout(grid)
 545
 546         main_layout.addLayout(ok_cancel_buttons(self))
 547         self.setLayout(main_layout)
 548
 549     def run(self):
 550         if not self.exec_():
 551             return
 552         return unicode(self.password_input.text())
 553
 554 class ReceivePopup(QDialog):
 555
 556     def leaveEvent(self, event):
 557         self.close()
 558
 559     def setup(self, address):
 560         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 561         address_display = QLineEdit(address)
 562         address_display.setReadOnly(True)
 563         resize_line_edit_width(address_display, address)
 564
 565         main_layout = QVBoxLayout(self)
 566         main_layout.addWidget(label)
 567         main_layout.addWidget(address_display)
 568
 569         self.setMouseTracking(True)
 570         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 571         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|
 572                             Qt.MSWindowsFixedSizeDialogHint)
 573         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 574         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 575         #self.setAlignment(Qt.AlignCenter)
 576
 577     def popup(self):
 578         parent = self.parent()
 579         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 580         self.move(top_left_pos)
 581         center_mouse_pos = self.mapToGlobal(self.rect().center())
 582         QCursor.setPos(center_mouse_pos)
 583         self.show()
 584
 585 class MiniActuator:
 586     """Initialize the definitions relating to themes and
 587     sending/recieving bitcoins."""
 588
 589
 590     def __init__(self, wallet):
 591         """Retrieve the gui theme used in previous session."""
 592         self.wallet = wallet
 593         self.theme_name = self.wallet.config.get('litegui_theme','Cleanlook')
 594         self.themes = load_theme_paths()
 595
 596     def load_theme(self):
 597         """Load theme retrieved from wallet file."""
 598         try:
 599             theme_prefix, theme_path = self.themes[self.theme_name]
 600         except KeyError:
 601             util.print_error("Theme not found!", self.theme_name)
 602             return
 603         QDir.setCurrent(os.path.join(theme_prefix, theme_path))
 604         with open(rsrc("style.css")) as style_file:
 605             qApp.setStyleSheet(style_file.read())
 606
 607     def theme_names(self):
 608         """Sort themes."""
 609         return sorted(self.themes.keys())
 610
 611     def selected_theme(self):
 612         """Select theme."""
 613         return self.theme_name
 614
 615     def change_theme(self, theme_name):
 616         """Change theme."""
 617         self.theme_name = theme_name
 618         self.wallet.config.set_key('litegui_theme',theme_name)
 619         self.load_theme()
 620
 621     def set_configured_currency(self, set_quote_currency):
 622         """Set the inital fiat currency conversion country (USD/EUR/GBP) in
 623         the GUI to what it was set to in the wallet."""
 624         currency = self.wallet.config.get('conversion_currency')
 625         # currency can be none when Electrum is used for the first
 626         # time and no setting has been created yet.
 627         if currency is not None:
 628             set_quote_currency(currency)
 629
 630     def set_config_currency(self, conversion_currency):
 631         """Change the wallet fiat currency country."""
 632         self.wallet.config.set_key('conversion_currency',conversion_currency,True)
 633
 634     def copy_address(self, receive_popup):
 635         """Copy the wallet addresses into the client."""
 636         addrs = [addr for addr in self.wallet.all_addresses()
 637                  if not self.wallet.is_change(addr)]
 638         # Select most recent addresses from gap limit
 639         addrs = addrs[-self.wallet.gap_limit:]
 640         copied_address = random.choice(addrs)
 641         qApp.clipboard().setText(copied_address)
 642         receive_popup.setup(copied_address)
 643         receive_popup.popup()
 644
 645     def waiting_dialog(self, f):
 646         s = Timer()
 647         s.start()
 648         w = QDialog()
 649         w.resize(200, 70)
 650         w.setWindowTitle('Electrum')
 651         l = QLabel('Sending transaction, please wait.')
 652         vbox = QVBoxLayout()
 653         vbox.addWidget(l)
 654         w.setLayout(vbox)
 655         w.show()
 656         def ff():
 657             s = f()
 658             if s: l.setText(s)
 659             else: w.close()
 660         w.connect(s, QtCore.SIGNAL('timersignal'), ff)
 661         w.exec_()
 662         w.destroy()
 663
 664     def send(self, address, amount, parent_window):
 665         """Send bitcoins to the target address."""
 666         dest_address = self.fetch_destination(address)
 667
 668         if dest_address is None or not self.wallet.is_valid(dest_address):
 669             QMessageBox.warning(parent_window, _('Error'),
 670                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 671             return False
 672
 673         convert_amount = lambda amount: \
 674             int(D(unicode(amount)) * bitcoin(1))
 675         amount = convert_amount(amount)
 676
 677         if self.wallet.use_encryption:
 678             password_dialog = PasswordDialog(parent_window)
 679             password = password_dialog.run()
 680             if not password:
 681                 return
 682         else:
 683             password = None
 684
 685         fee = 0
 686         # 0.1 BTC = 10000000
 687         if amount < bitcoin(1) / 10:
 688             # 0.001 BTC
 689             fee = bitcoin(1) / 1000
 690
 691         try:
 692             tx = self.wallet.mktx([(dest_address, amount)], "", password, fee)
 693         except BaseException as error:
 694             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 695             return False
 696
 697         h = self.wallet.send_tx(tx)
 698
 699         self.waiting_dialog(lambda: False if self.wallet.tx_event.isSet() else _("Sending transaction, please wait..."))
 700
 701         status, message = self.wallet.receive_tx(h)
 702
 703         if not status:
 704             import tempfile
 705             dumpf = tempfile.NamedTemporaryFile(delete=False)
 706             dumpf.write(tx)
 707             dumpf.close()
 708             print "Dumped error tx to", dumpf.name
 709             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 710             return False
 711
 712         QMessageBox.information(parent_window, '',
 713             _('Your transaction has been sent.') + '\n' + message, _('OK'))
 714         return True
 715
 716     def fetch_destination(self, address):
 717         recipient = unicode(address).strip()
 718
 719         # alias
 720         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 721                           recipient)
 722
 723         # label or alias, with address in brackets
 724         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 725                           recipient)
 726
 727         if match1:
 728             dest_address = \
 729                 self.wallet.get_alias(recipient, True,
 730                                       self.show_message, self.question)
 731             return dest_address
 732         elif match2:
 733             return match2.group(2)
 734         else:
 735             return recipient
 736
 737     def is_valid(self, address):
 738         """Check if bitcoin address is valid."""
 739         return self.wallet.is_valid(address)
 740
 741     def acceptbit(self, currency):
 742         master_pubkey = self.wallet.master_public_key
 743         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 744         webbrowser.open(url)
 745
 746     def show_seed_dialog(self):
 747         gui_qt.ElectrumWindow.show_seed_dialog(self.wallet)
 748
 749 class MiniDriver(QObject):
 750
 751     INITIALIZING = 0
 752     CONNECTING = 1
 753     SYNCHRONIZING = 2
 754     READY = 3
 755
 756     def __init__(self, wallet, window):
 757         super(QObject, self).__init__()
 758
 759         self.wallet = wallet
 760         self.window = window
 761
 762         self.wallet.interface.register_callback('updated',self.update_callback)
 763         self.wallet.interface.register_callback('connected', self.update_callback)
 764         self.wallet.interface.register_callback('disconnected', self.update_callback)
 765
 766         self.state = None
 767
 768         self.initializing()
 769         self.connect(self, SIGNAL("updatesignal()"), self.update)
 770         self.update_callback()
 771
 772     # This is a hack to workaround that Qt does not like changing the
 773     # window properties from this other thread before the runloop has
 774     # been called from.
 775     def update_callback(self):
 776         self.emit(SIGNAL("updatesignal()"))
 777
 778     def update(self):
 779         if not self.wallet.interface:
 780             self.initializing()
 781         elif not self.wallet.interface.is_connected:
 782             self.connecting()
 783         elif not self.wallet.up_to_date:
 784             self.synchronizing()
 785         else:
 786             self.ready()
 787
 788         if self.wallet.up_to_date:
 789             self.update_balance()
 790             self.update_completions()
 791             self.update_history()
 792
 793     def initializing(self):
 794         if self.state == self.INITIALIZING:
 795             return
 796         self.state = self.INITIALIZING
 797         self.window.deactivate()
 798
 799     def connecting(self):
 800         if self.state == self.CONNECTING:
 801             return
 802         self.state = self.CONNECTING
 803         self.window.deactivate()
 804
 805     def synchronizing(self):
 806         if self.state == self.SYNCHRONIZING:
 807             return
 808         self.state = self.SYNCHRONIZING
 809         self.window.deactivate()
 810
 811     def ready(self):
 812         if self.state == self.READY:
 813             return
 814         self.state = self.READY
 815         self.window.activate()
 816
 817     def update_balance(self):
 818         conf_balance, unconf_balance = self.wallet.get_balance()
 819         balance = D(conf_balance + unconf_balance)
 820         self.window.set_balances(balance)
 821
 822     def update_completions(self):
 823         completions = []
 824         for addr, label in self.wallet.labels.items():
 825             if addr in self.wallet.addressbook:
 826                 completions.append("%s <%s>" % (label, addr))
 827         completions = completions + self.wallet.aliases.keys()
 828         self.window.update_completions(completions)
 829
 830     def update_history(self):
 831         tx_history = self.wallet.get_tx_history()
 832         self.window.update_history(tx_history)
 833
 834 if __name__ == "__main__":
 835     app = QApplication(sys.argv)
 836     with open(rsrc("style.css")) as style_file:
 837         app.setStyleSheet(style_file.read())
 838     mini = MiniWindow()
 839     sys.exit(app.exec_())
 840