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 import csv
  31 import datetime
  32
  33 from wallet import format_satoshis
  34 import gui_qt
  35 import shutil
  36
  37 bitcoin = lambda v: v * 100000000
  38
  39 def IconButton(filename, parent=None):
  40     pixmap = QPixmap(filename)
  41     icon = QIcon(pixmap)
  42     return QPushButton(icon, "", parent)
  43
  44 class Timer(QThread):
  45     def run(self):
  46         while True:
  47             self.emit(SIGNAL('timersignal'))
  48             time.sleep(0.5)
  49
  50 def resize_line_edit_width(line_edit, text_input):
  51     metrics = QFontMetrics(qApp.font())
  52     # Create an extra character to add some space on the end
  53     text_input += "A"
  54     line_edit.setMinimumWidth(metrics.width(text_input))
  55
  56 def load_theme_name(theme_path):
  57     try:
  58         with open(os.path.join(theme_path, "name.cfg")) as name_cfg_file:
  59             return name_cfg_file.read().rstrip("\n").strip()
  60     except IOError:
  61         return None
  62
  63
  64 def theme_dirs_from_prefix(prefix):
  65     if not os.path.exists(prefix):
  66         return []
  67     theme_paths = {}
  68     for potential_theme in os.listdir(prefix):
  69         theme_full_path = os.path.join(prefix, potential_theme)
  70         theme_css = os.path.join(theme_full_path, "style.css")
  71         if not os.path.exists(theme_css):
  72             continue
  73         theme_name = load_theme_name(theme_full_path)
  74         if theme_name is None:
  75             continue
  76         theme_paths[theme_name] = prefix, potential_theme
  77     return theme_paths
  78
  79 def load_theme_paths():
  80     theme_paths = {}
  81     prefixes = (util.local_data_dir(), util.appdata_dir())
  82     for prefix in prefixes:
  83         theme_paths.update(theme_dirs_from_prefix(prefix))
  84     return theme_paths
  85
  86
  87 class ElectrumGui(QObject):
  88
  89     def __init__(self, wallet, config):
  90         super(QObject, self).__init__()
  91
  92         self.wallet = wallet
  93         self.config = config
  94         self.check_qt_version()
  95         self.app = QApplication(sys.argv)
  96
  97
  98     def check_qt_version(self):
  99         qtVersion = qVersion()
 100         if not(int(qtVersion[0]) >= 4 and int(qtVersion[2]) >= 7):
 101             app = QApplication(sys.argv)
 102             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")
 103             self.config.set_key('gui','classic',True)
 104             sys.exit(0)
 105
 106
 107     def main(self, url):
 108         actuator = MiniActuator(self.wallet)
 109         # Should probably not modify the current path but instead
 110         # change the behaviour of rsrc(...)
 111         old_path = QDir.currentPath()
 112         actuator.load_theme()
 113
 114         self.mini = MiniWindow(actuator, self.expand, self.config)
 115         driver = MiniDriver(self.wallet, self.mini)
 116
 117         # Reset path back to original value now that loading the GUI
 118         # is completed.
 119         QDir.setCurrent(old_path)
 120
 121         if url:
 122             self.set_url(url)
 123
 124         timer = Timer()
 125         timer.start()
 126         self.expert = gui_qt.ElectrumWindow(self.wallet, self.config)
 127         self.expert.app = self.app
 128         self.expert.connect_slots(timer)
 129         self.expert.update_wallet()
 130         self.app.exec_()
 131
 132     def expand(self):
 133         """Hide the lite mode window and show pro-mode."""
 134         self.mini.hide()
 135         self.expert.show()
 136
 137     def set_url(self, url):
 138         payto, amount, label, message, signature, identity, url = \
 139             self.wallet.parse_url(url, self.show_message, self.show_question)
 140         self.mini.set_payment_fields(payto, amount)
 141
 142     def show_message(self, message):
 143         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
 144
 145     def show_question(self, message):
 146         choice = QMessageBox.question(self.mini, _("Message"), message,
 147                                       QMessageBox.Yes|QMessageBox.No,
 148                                       QMessageBox.No)
 149         return choice == QMessageBox.Yes
 150
 151     def restore_or_create(self):
 152         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 153         return qt_gui_object.restore_or_create()
 154
 155 class MiniWindow(QDialog):
 156
 157     def __init__(self, actuator, expand_callback, config):
 158         super(MiniWindow, self).__init__()
 159
 160         self.actuator = actuator
 161         self.config = config
 162
 163         self.btc_balance = None
 164         self.quote_currencies = ["EUR", "USD", "GBP"]
 165         self.actuator.set_configured_currency(self.set_quote_currency)
 166         self.exchanger = exchange_rate.Exchanger(self)
 167         # Needed because price discovery is done in a different thread
 168         # which needs to be sent back to this main one to update the GUI
 169         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 170
 171         self.balance_label = BalanceLabel(self.change_quote_currency)
 172         self.balance_label.setObjectName("balance_label")
 173
 174         self.receive_button = QPushButton(_("&Receive"))
 175         self.receive_button.setObjectName("receive_button")
 176         self.receive_button.setDefault(True)
 177         self.receive_button.clicked.connect(self.copy_address)
 178
 179         # Bitcoin address code
 180         self.address_input = QLineEdit()
 181         self.address_input.setPlaceholderText(_("Enter a Bitcoin address..."))
 182         self.address_input.setObjectName("address_input")
 183
 184
 185         self.address_input.textEdited.connect(self.address_field_changed)
 186         resize_line_edit_width(self.address_input,
 187                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 188
 189         self.address_completions = QStringListModel()
 190         address_completer = QCompleter(self.address_input)
 191         address_completer.setCaseSensitivity(False)
 192         address_completer.setModel(self.address_completions)
 193         self.address_input.setCompleter(address_completer)
 194
 195         address_layout = QHBoxLayout()
 196         address_layout.addWidget(self.address_input)
 197
 198         self.amount_input = QLineEdit()
 199         self.amount_input.setPlaceholderText(_("... and amount"))
 200         self.amount_input.setObjectName("amount_input")
 201         # This is changed according to the user's displayed balance
 202         self.amount_validator = QDoubleValidator(self.amount_input)
 203         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 204         self.amount_validator.setDecimals(8)
 205         self.amount_input.setValidator(self.amount_validator)
 206
 207         # This removes the very ugly OSX highlighting, please leave this in :D
 208         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 209         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 210         self.amount_input.textChanged.connect(self.amount_input_changed)
 211
 212         self.send_button = QPushButton(_("&Send"))
 213         self.send_button.setObjectName("send_button")
 214         self.send_button.setDisabled(True);
 215         self.send_button.clicked.connect(self.send)
 216
 217         main_layout = QGridLayout(self)
 218
 219         main_layout.addWidget(self.balance_label, 0, 0)
 220         main_layout.addWidget(self.receive_button, 0, 1)
 221
 222         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 223
 224         main_layout.addWidget(self.amount_input, 2, 0)
 225         main_layout.addWidget(self.send_button, 2, 1)
 226
 227         self.history_list = history_widget.HistoryWidget()
 228         self.history_list.setObjectName("history")
 229         self.history_list.hide()
 230         self.history_list.setAlternatingRowColors(True)
 231         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 232
 233         menubar = QMenuBar()
 234         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 235
 236         electrum_menu.addSeparator()
 237
 238         brain_seed = electrum_menu.addAction(_("&BrainWallet Info"))
 239         brain_seed.triggered.connect(self.actuator.show_seed_dialog)
 240         quit_option = electrum_menu.addAction(_("&Quit"))
 241         quit_option.triggered.connect(self.close)
 242
 243         view_menu = menubar.addMenu(_("&View"))
 244         extra_menu = menubar.addMenu(_("&Extra"))
 245
 246         backup_wallet = extra_menu.addAction( _("&Create wallet backup"))
 247         backup_wallet.triggered.connect(self.backup_wallet)
 248
 249         export_csv = extra_menu.addAction( _("&Export transactions to CSV") )
 250         export_csv.triggered.connect(self.actuator.csv_transaction)
 251
 252         expert_gui = view_menu.addAction(_("&Classic GUI"))
 253         expert_gui.triggered.connect(expand_callback)
 254         themes_menu = view_menu.addMenu(_("&Themes"))
 255         selected_theme = self.actuator.selected_theme()
 256         theme_group = QActionGroup(self)
 257         for theme_name in self.actuator.theme_names():
 258             theme_action = themes_menu.addAction(theme_name)
 259             theme_action.setCheckable(True)
 260             if selected_theme == theme_name:
 261                 theme_action.setChecked(True)
 262             class SelectThemeFunctor:
 263                 def __init__(self, theme_name, toggle_theme):
 264                     self.theme_name = theme_name
 265                     self.toggle_theme = toggle_theme
 266                 def __call__(self, checked):
 267                     if checked:
 268                         self.toggle_theme(self.theme_name)
 269             delegate = SelectThemeFunctor(theme_name, self.toggle_theme)
 270             theme_action.toggled.connect(delegate)
 271             theme_group.addAction(theme_action)
 272         view_menu.addSeparator()
 273         show_history = view_menu.addAction(_("Show History"))
 274         show_history.setCheckable(True)
 275         show_history.toggled.connect(self.show_history)
 276
 277         help_menu = menubar.addMenu(_("&Help"))
 278         the_website = help_menu.addAction(_("&Website"))
 279         the_website.triggered.connect(self.the_website)
 280         help_menu.addSeparator()
 281         report_bug = help_menu.addAction(_("&Report Bug"))
 282         report_bug.triggered.connect(self.show_report_bug)
 283         show_about = help_menu.addAction(_("&About"))
 284         show_about.triggered.connect(self.show_about)
 285         main_layout.setMenuBar(menubar)
 286
 287         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 288         quit_shortcut.activated.connect(self.close)
 289         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 290         close_shortcut.activated.connect(self.close)
 291
 292         g = self.config.get("winpos-lite",[4, 25, 351, 149])
 293         self.setGeometry(g[0], g[1], g[2], g[3])
 294
 295         show_hist = self.config.get("gui_show_history",False)
 296         show_history.setChecked(show_hist)
 297         self.show_history(show_hist)
 298
 299         self.setWindowIcon(QIcon(":electrum.png"))
 300         self.setWindowTitle("Electrum")
 301         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 302         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 303         self.setObjectName("main_window")
 304         self.show()
 305
 306     def toggle_theme(self, theme_name):
 307         old_path = QDir.currentPath()
 308         self.actuator.change_theme(theme_name)
 309         # Recompute style globally
 310         qApp.style().unpolish(self)
 311         qApp.style().polish(self)
 312         QDir.setCurrent(old_path)
 313
 314     def closeEvent(self, event):
 315         g = self.geometry()
 316         self.config.set_key("winpos-lite", [g.left(),g.top(),g.width(),g.height()],True)
 317         self.config.set_key("gui_show_history", self.history_list.isVisible(),True)
 318
 319         super(MiniWindow, self).closeEvent(event)
 320         qApp.quit()
 321
 322     def set_payment_fields(self, dest_address, amount):
 323         self.address_input.setText(dest_address)
 324         self.address_field_changed(dest_address)
 325         self.amount_input.setText(amount)
 326
 327     def activate(self):
 328         pass
 329
 330     def deactivate(self):
 331         pass
 332
 333     def set_quote_currency(self, currency):
 334         """Set and display the fiat currency country."""
 335         assert currency in self.quote_currencies
 336         self.quote_currencies.remove(currency)
 337         self.quote_currencies.insert(0, currency)
 338         self.refresh_balance()
 339
 340     def change_quote_currency(self):
 341         self.quote_currencies = \
 342             self.quote_currencies[1:] + self.quote_currencies[0:1]
 343         self.actuator.set_config_currency(self.quote_currencies[0])
 344         self.refresh_balance()
 345
 346     def refresh_balance(self):
 347         if self.btc_balance is None:
 348             # Price has been discovered before wallet has been loaded
 349             # and server connect... so bail.
 350             return
 351         self.set_balances(self.btc_balance)
 352         self.amount_input_changed(self.amount_input.text())
 353
 354     def set_balances(self, btc_balance):
 355         """Set the bitcoin balance and update the amount label accordingly."""
 356         self.btc_balance = btc_balance
 357         quote_text = self.create_quote_text(btc_balance)
 358         if quote_text:
 359             quote_text = "(%s)" % quote_text
 360         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 361         self.balance_label.set_balance_text(btc_balance, quote_text)
 362         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 363
 364     def amount_input_changed(self, amount_text):
 365         """Update the number of bitcoins displayed."""
 366         self.check_button_status()
 367
 368         try:
 369             amount = D(str(amount_text))
 370         except decimal.InvalidOperation:
 371             self.balance_label.show_balance()
 372         else:
 373             quote_text = self.create_quote_text(amount * bitcoin(1))
 374             if quote_text:
 375                 self.balance_label.set_amount_text(quote_text)
 376                 self.balance_label.show_amount()
 377             else:
 378                 self.balance_label.show_balance()
 379
 380     def create_quote_text(self, btc_balance):
 381         """Return a string copy of the amount fiat currency the
 382         user has in bitcoins."""
 383         quote_currency = self.quote_currencies[0]
 384         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 385         if quote_balance is None:
 386             quote_text = ""
 387         else:
 388             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 389                                       quote_currency)
 390         return quote_text
 391
 392     def send(self):
 393         if self.actuator.send(self.address_input.text(),
 394                               self.amount_input.text(), self):
 395             self.address_input.setText("")
 396             self.amount_input.setText("")
 397
 398     def check_button_status(self):
 399         """Check that the bitcoin address is valid and that something
 400         is entered in the amount before making the send button clickable."""
 401         try:
 402             value = D(str(self.amount_input.text())) * 10**8
 403         except decimal.InvalidOperation:
 404             value = None
 405         # self.address_input.property(...) returns a qVariant, not a bool.
 406         # The == is needed to properly invoke a comparison.
 407         if (self.address_input.property("isValid") == True and
 408             value is not None and 0 < value <= self.btc_balance):
 409             self.send_button.setDisabled(False)
 410         else:
 411             self.send_button.setDisabled(True)
 412
 413     def address_field_changed(self, address):
 414         if self.actuator.is_valid(address):
 415             self.check_button_status()
 416             self.address_input.setProperty("isValid", True)
 417             self.recompute_style(self.address_input)
 418         else:
 419             self.send_button.setDisabled(True)
 420             self.address_input.setProperty("isValid", False)
 421             self.recompute_style(self.address_input)
 422
 423         if len(address) == 0:
 424             self.address_input.setProperty("isValid", None)
 425             self.recompute_style(self.address_input)
 426
 427     def recompute_style(self, element):
 428         self.style().unpolish(element)
 429         self.style().polish(element)
 430
 431     def copy_address(self):
 432         receive_popup = ReceivePopup(self.receive_button)
 433         self.actuator.copy_address(receive_popup)
 434
 435     def update_completions(self, completions):
 436         self.address_completions.setStringList(completions)
 437
 438     def update_history(self, tx_history):
 439         from util import format_satoshis
 440         for item in tx_history[-10:]:
 441             tx_hash, conf, is_mine, value, fee, balance, timestamp = item
 442             label = self.actuator.wallet.get_label(tx_hash)[0]
 443             #amount = D(value) / 10**8
 444             v_str = format_satoshis(value, True)
 445             self.history_list.append(label, v_str)
 446
 447     def acceptbit(self):
 448         self.actuator.acceptbit(self.quote_currencies[0])
 449
 450     def the_website(self):
 451         webbrowser.open("http://electrum-desktop.com")
 452
 453     def show_about(self):
 454         QMessageBox.about(self, "Electrum",
 455             _("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"))
 456
 457     def show_report_bug(self):
 458         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 459             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 460
 461     def show_history(self, toggle_state):
 462         if toggle_state:
 463             self.history_list.show()
 464         else:
 465             self.history_list.hide()
 466
 467     def backup_wallet(self):
 468         try:
 469           folderName = QFileDialog.getExistingDirectory(QWidget(), 'Select folder to save a copy of your wallet to', os.path.expanduser('~/'))
 470           if folderName:
 471             sourceFile = util.user_dir() + '/electrum.dat'
 472             shutil.copy2(sourceFile, str(folderName))
 473             QMessageBox.information(None,"Wallet backup created", "A copy of your wallet file was created in '%s'" % str(folderName))
 474         except (IOError, os.error), reason:
 475           QMessageBox.critical(None,"Unable to create backup", "Electrum was unable copy your wallet file to the specified location.\n" + str(reason))
 476
 477
 478
 479
 480 class BalanceLabel(QLabel):
 481
 482     SHOW_CONNECTING = 1
 483     SHOW_BALANCE = 2
 484     SHOW_AMOUNT = 3
 485
 486     def __init__(self, change_quote_currency, parent=None):
 487         super(QLabel, self).__init__(_("Connecting..."), parent)
 488         self.change_quote_currency = change_quote_currency
 489         self.state = self.SHOW_CONNECTING
 490         self.balance_text = ""
 491         self.amount_text = ""
 492
 493     def mousePressEvent(self, event):
 494         """Change the fiat currency selection if window background is clicked."""
 495         if self.state != self.SHOW_CONNECTING:
 496             self.change_quote_currency()
 497
 498     def set_balance_text(self, btc_balance, quote_text):
 499         """Set the amount of bitcoins in the gui."""
 500         if self.state == self.SHOW_CONNECTING:
 501             self.state = self.SHOW_BALANCE
 502         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)
 503         if self.state == self.SHOW_BALANCE:
 504             self.setText(self.balance_text)
 505
 506     def set_amount_text(self, quote_text):
 507         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 508         if self.state == self.SHOW_AMOUNT:
 509             self.setText(self.amount_text)
 510
 511     def show_balance(self):
 512         if self.state == self.SHOW_AMOUNT:
 513             self.state = self.SHOW_BALANCE
 514             self.setText(self.balance_text)
 515
 516     def show_amount(self):
 517         if self.state == self.SHOW_BALANCE:
 518             self.state = self.SHOW_AMOUNT
 519             self.setText(self.amount_text)
 520
 521 def ok_cancel_buttons(dialog):
 522     row_layout = QHBoxLayout()
 523     row_layout.addStretch(1)
 524     ok_button = QPushButton(_("OK"))
 525     row_layout.addWidget(ok_button)
 526     ok_button.clicked.connect(dialog.accept)
 527     cancel_button = QPushButton(_("Cancel"))
 528     row_layout.addWidget(cancel_button)
 529     cancel_button.clicked.connect(dialog.reject)
 530     return row_layout
 531
 532 class PasswordDialog(QDialog):
 533
 534     def __init__(self, parent):
 535         super(QDialog, self).__init__(parent)
 536
 537         self.setModal(True)
 538
 539         self.password_input = QLineEdit()
 540         self.password_input.setEchoMode(QLineEdit.Password)
 541
 542         main_layout = QVBoxLayout(self)
 543         message = _('Please enter your password')
 544         main_layout.addWidget(QLabel(message))
 545
 546         grid = QGridLayout()
 547         grid.setSpacing(8)
 548         grid.addWidget(QLabel(_('Password')), 1, 0)
 549         grid.addWidget(self.password_input, 1, 1)
 550         main_layout.addLayout(grid)
 551
 552         main_layout.addLayout(ok_cancel_buttons(self))
 553         self.setLayout(main_layout)
 554
 555     def run(self):
 556         if not self.exec_():
 557             return
 558         return unicode(self.password_input.text())
 559
 560 class ReceivePopup(QDialog):
 561
 562     def leaveEvent(self, event):
 563         self.close()
 564
 565     def setup(self, address):
 566         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 567         address_display = QLineEdit(address)
 568         address_display.setReadOnly(True)
 569         resize_line_edit_width(address_display, address)
 570
 571         main_layout = QVBoxLayout(self)
 572         main_layout.addWidget(label)
 573         main_layout.addWidget(address_display)
 574
 575         self.setMouseTracking(True)
 576         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 577         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|
 578                             Qt.MSWindowsFixedSizeDialogHint)
 579         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 580         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 581         #self.setAlignment(Qt.AlignCenter)
 582
 583     def popup(self):
 584         parent = self.parent()
 585         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 586         self.move(top_left_pos)
 587         center_mouse_pos = self.mapToGlobal(self.rect().center())
 588         QCursor.setPos(center_mouse_pos)
 589         self.show()
 590
 591 class MiniActuator:
 592     """Initialize the definitions relating to themes and
 593     sending/recieving bitcoins."""
 594
 595
 596     def __init__(self, wallet):
 597         """Retrieve the gui theme used in previous session."""
 598         self.wallet = wallet
 599         self.theme_name = self.wallet.config.get('litegui_theme','Cleanlook')
 600         self.themes = load_theme_paths()
 601
 602     def load_theme(self):
 603         """Load theme retrieved from wallet file."""
 604         try:
 605             theme_prefix, theme_path = self.themes[self.theme_name]
 606         except KeyError:
 607             util.print_error("Theme not found!", self.theme_name)
 608             return
 609         QDir.setCurrent(os.path.join(theme_prefix, theme_path))
 610         with open(rsrc("style.css")) as style_file:
 611             qApp.setStyleSheet(style_file.read())
 612
 613     def theme_names(self):
 614         """Sort themes."""
 615         return sorted(self.themes.keys())
 616
 617     def selected_theme(self):
 618         """Select theme."""
 619         return self.theme_name
 620
 621     def change_theme(self, theme_name):
 622         """Change theme."""
 623         self.theme_name = theme_name
 624         self.wallet.config.set_key('litegui_theme',theme_name)
 625         self.load_theme()
 626
 627     def set_configured_currency(self, set_quote_currency):
 628         """Set the inital fiat currency conversion country (USD/EUR/GBP) in
 629         the GUI to what it was set to in the wallet."""
 630         currency = self.wallet.config.get('conversion_currency')
 631         # currency can be none when Electrum is used for the first
 632         # time and no setting has been created yet.
 633         if currency is not None:
 634             set_quote_currency(currency)
 635
 636     def set_config_currency(self, conversion_currency):
 637         """Change the wallet fiat currency country."""
 638         self.wallet.config.set_key('conversion_currency',conversion_currency,True)
 639
 640     def copy_address(self, receive_popup):
 641         """Copy the wallet addresses into the client."""
 642         addrs = [addr for addr in self.wallet.all_addresses()
 643                  if not self.wallet.is_change(addr)]
 644         # Select most recent addresses from gap limit
 645         addrs = addrs[-self.wallet.gap_limit:]
 646         copied_address = random.choice(addrs)
 647         qApp.clipboard().setText(copied_address)
 648         receive_popup.setup(copied_address)
 649         receive_popup.popup()
 650
 651     def waiting_dialog(self, f):
 652         s = Timer()
 653         s.start()
 654         w = QDialog()
 655         w.resize(200, 70)
 656         w.setWindowTitle('Electrum')
 657         l = QLabel('Sending transaction, please wait.')
 658         vbox = QVBoxLayout()
 659         vbox.addWidget(l)
 660         w.setLayout(vbox)
 661         w.show()
 662         def ff():
 663             s = f()
 664             if s: l.setText(s)
 665             else: w.close()
 666         w.connect(s, QtCore.SIGNAL('timersignal'), ff)
 667         w.exec_()
 668         w.destroy()
 669
 670     def csv_transaction(self):
 671         try:
 672           fileName = QFileDialog.getSaveFileName(QWidget(), 'Select file to export your wallet transactions to', os.path.expanduser('~/'), "*.csv")
 673           if fileName:
 674             with open(fileName, "w+") as csvfile:
 675                 transaction = csv.writer(csvfile)
 676                 transaction.writerow(["transaction_hash","label", "confirmations", "value", "fee", "balance", "timestamp"])
 677                 for item in self.wallet.get_tx_history():
 678                     tx_hash, confirmations, is_mine, value, fee, balance, timestamp = item
 679                     if confirmations:
 680                         if timestamp is not None:
 681                             try:
 682                                 time_string = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
 683                             except [RuntimeError, TypeError, NameError] as reason:
 684                                 time_string = "unknown"
 685                                 pass
 686                         else:
 687                           time_string = "unknown"
 688                     else:
 689                         time_string = "pending"
 690
 691                     if value is not None:
 692                         value_string = format_satoshis(value, True, self.wallet.num_zeros)
 693                     else:
 694                         value_string = '--'
 695
 696                     if fee is not None:
 697                         fee_string = format_satoshis(fee, True, self.wallet.num_zeros)
 698                     else:
 699                         fee_string = '0'
 700
 701                     if tx_hash:
 702                         label, is_default_label = self.wallet.get_label(tx_hash)
 703                     else:
 704                       label = ""
 705
 706                     balance_string = format_satoshis(balance, False, self.wallet.num_zeros)
 707                     transaction.writerow([tx_hash, label, confirmations, value_string, fee_string, balance_string, time_string])
 708                 QMessageBox.information(None,"CSV Export created", "Your CSV export has been succesfully created.")
 709         except (IOError, os.error), reason:
 710           QMessageBox.critical(None,"Unable to create csv", "Electrum was unable to produce a transaction export.\n" + str(reason))
 711
 712     def send(self, address, amount, parent_window):
 713         """Send bitcoins to the target address."""
 714         dest_address = self.fetch_destination(address)
 715
 716         if dest_address is None or not self.wallet.is_valid(dest_address):
 717             QMessageBox.warning(parent_window, _('Error'),
 718                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 719             return False
 720
 721         convert_amount = lambda amount: \
 722             int(D(unicode(amount)) * bitcoin(1))
 723         amount = convert_amount(amount)
 724
 725         if self.wallet.use_encryption:
 726             password_dialog = PasswordDialog(parent_window)
 727             password = password_dialog.run()
 728             if not password:
 729                 return
 730         else:
 731             password = None
 732
 733         fee = 0
 734         # 0.1 BTC = 10000000
 735         if amount < bitcoin(1) / 10:
 736             # 0.001 BTC
 737             fee = bitcoin(1) / 1000
 738
 739         try:
 740             tx = self.wallet.mktx([(dest_address, amount)], "", password, fee)
 741         except BaseException as error:
 742             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 743             return False
 744
 745         h = self.wallet.send_tx(tx)
 746
 747         self.waiting_dialog(lambda: False if self.wallet.tx_event.isSet() else _("Sending transaction, please wait..."))
 748
 749         status, message = self.wallet.receive_tx(h)
 750
 751         if not status:
 752             import tempfile
 753             dumpf = tempfile.NamedTemporaryFile(delete=False)
 754             dumpf.write(tx)
 755             dumpf.close()
 756             print "Dumped error tx to", dumpf.name
 757             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 758             return False
 759
 760         QMessageBox.information(parent_window, '',
 761             _('Your transaction has been sent.') + '\n' + message, _('OK'))
 762         return True
 763
 764     def fetch_destination(self, address):
 765         recipient = unicode(address).strip()
 766
 767         # alias
 768         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 769                           recipient)
 770
 771         # label or alias, with address in brackets
 772         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 773                           recipient)
 774
 775         if match1:
 776             dest_address = \
 777                 self.wallet.get_alias(recipient, True,
 778                                       self.show_message, self.question)
 779             return dest_address
 780         elif match2:
 781             return match2.group(2)
 782         else:
 783             return recipient
 784
 785     def is_valid(self, address):
 786         """Check if bitcoin address is valid."""
 787         return self.wallet.is_valid(address)
 788
 789     def acceptbit(self, currency):
 790         master_pubkey = self.wallet.master_public_key
 791         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 792         webbrowser.open(url)
 793
 794     def show_seed_dialog(self):
 795         gui_qt.ElectrumWindow.show_seed_dialog(self.wallet)
 796
 797 class MiniDriver(QObject):
 798
 799     INITIALIZING = 0
 800     CONNECTING = 1
 801     SYNCHRONIZING = 2
 802     READY = 3
 803
 804     def __init__(self, wallet, window):
 805         super(QObject, self).__init__()
 806
 807         self.wallet = wallet
 808         self.window = window
 809
 810         self.wallet.interface.register_callback('updated',self.update_callback)
 811         self.wallet.interface.register_callback('connected', self.update_callback)
 812         self.wallet.interface.register_callback('disconnected', self.update_callback)
 813
 814         self.state = None
 815
 816         self.initializing()
 817         self.connect(self, SIGNAL("updatesignal()"), self.update)
 818         self.update_callback()
 819
 820     # This is a hack to workaround that Qt does not like changing the
 821     # window properties from this other thread before the runloop has
 822     # been called from.
 823     def update_callback(self):
 824         self.emit(SIGNAL("updatesignal()"))
 825
 826     def update(self):
 827         if not self.wallet.interface:
 828             self.initializing()
 829         elif not self.wallet.interface.is_connected:
 830             self.connecting()
 831         elif not self.wallet.up_to_date:
 832             self.synchronizing()
 833         else:
 834             self.ready()
 835
 836         if self.wallet.up_to_date:
 837             self.update_balance()
 838             self.update_completions()
 839             self.update_history()
 840
 841     def initializing(self):
 842         if self.state == self.INITIALIZING:
 843             return
 844         self.state = self.INITIALIZING
 845         self.window.deactivate()
 846
 847     def connecting(self):
 848         if self.state == self.CONNECTING:
 849             return
 850         self.state = self.CONNECTING
 851         self.window.deactivate()
 852
 853     def synchronizing(self):
 854         if self.state == self.SYNCHRONIZING:
 855             return
 856         self.state = self.SYNCHRONIZING
 857         self.window.deactivate()
 858
 859     def ready(self):
 860         if self.state == self.READY:
 861             return
 862         self.state = self.READY
 863         self.window.activate()
 864
 865     def update_balance(self):
 866         conf_balance, unconf_balance = self.wallet.get_balance()
 867         balance = D(conf_balance + unconf_balance)
 868         self.window.set_balances(balance)
 869
 870     def update_completions(self):
 871         completions = []
 872         for addr, label in self.wallet.labels.items():
 873             if addr in self.wallet.addressbook:
 874                 completions.append("%s <%s>" % (label, addr))
 875         completions = completions + self.wallet.aliases.keys()
 876         self.window.update_completions(completions)
 877
 878     def update_history(self):
 879         tx_history = self.wallet.get_tx_history()
 880         self.window.update_history(tx_history)
 881
 882 if __name__ == "__main__":
 883     app = QApplication(sys.argv)
 884     with open(rsrc("style.css")) as style_file:
 885         app.setStyleSheet(style_file.read())
 886     mini = MiniWindow()
 887     sys.exit(app.exec_())
 888