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 interface import DEFAULT_SERVERS
  19 from util import get_resource_path as rsrc
  20 from i18n import _
  21 import decimal
  22 import exchange_rate
  23 import os.path
  24 import random
  25 import re
  26 import time
  27 import wallet
  28 import webbrowser
  29 import history_widget
  30 import util
  31 import csv
  32 import datetime
  33
  34 from wallet import format_satoshis
  35 import gui_qt
  36 import shutil
  37
  38 bitcoin = lambda v: v * 100000000
  39
  40 def IconButton(filename, parent=None):
  41     pixmap = QPixmap(filename)
  42     icon = QIcon(pixmap)
  43     return QPushButton(icon, "", parent)
  44
  45 class Timer(QThread):
  46     def run(self):
  47         while True:
  48             self.emit(SIGNAL('timersignal'))
  49             time.sleep(0.5)
  50
  51 def resize_line_edit_width(line_edit, text_input):
  52     metrics = QFontMetrics(qApp.font())
  53     # Create an extra character to add some space on the end
  54     text_input += "A"
  55     line_edit.setMinimumWidth(metrics.width(text_input))
  56
  57 def load_theme_name(theme_path):
  58     try:
  59         with open(os.path.join(theme_path, "name.cfg")) as name_cfg_file:
  60             return name_cfg_file.read().rstrip("\n").strip()
  61     except IOError:
  62         return None
  63
  64
  65 def theme_dirs_from_prefix(prefix):
  66     if not os.path.exists(prefix):
  67         return []
  68     theme_paths = {}
  69     for potential_theme in os.listdir(prefix):
  70         theme_full_path = os.path.join(prefix, potential_theme)
  71         theme_css = os.path.join(theme_full_path, "style.css")
  72         if not os.path.exists(theme_css):
  73             continue
  74         theme_name = load_theme_name(theme_full_path)
  75         if theme_name is None:
  76             continue
  77         theme_paths[theme_name] = prefix, potential_theme
  78     return theme_paths
  79
  80 def load_theme_paths():
  81     theme_paths = {}
  82     prefixes = (util.local_data_dir(), util.appdata_dir())
  83     for prefix in prefixes:
  84         theme_paths.update(theme_dirs_from_prefix(prefix))
  85     return theme_paths
  86
  87
  88 class ElectrumGui(QObject):
  89
  90     def __init__(self, wallet, config):
  91         super(QObject, self).__init__()
  92
  93         self.wallet = wallet
  94         self.config = config
  95         self.check_qt_version()
  96         self.app = QApplication(sys.argv)
  97         self.wallet.interface.register_callback('peers', self.server_list_changed)
  98
  99
 100     def check_qt_version(self):
 101         qtVersion = qVersion()
 102         if not(int(qtVersion[0]) >= 4 and int(qtVersion[2]) >= 7):
 103             app = QApplication(sys.argv)
 104             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")
 105             self.config.set_key('gui','classic',True)
 106             sys.exit(0)
 107
 108
 109     def main(self, url):
 110         actuator = MiniActuator(self.wallet)
 111         self.connect(self, SIGNAL("updateservers()"),
 112                      actuator.update_servers_list)
 113         # Should probably not modify the current path but instead
 114         # change the behaviour of rsrc(...)
 115         old_path = QDir.currentPath()
 116         actuator.load_theme()
 117
 118         self.mini = MiniWindow(actuator, self.expand, self.config)
 119         driver = MiniDriver(self.wallet, self.mini)
 120
 121         # Reset path back to original value now that loading the GUI
 122         # is completed.
 123         QDir.setCurrent(old_path)
 124
 125         if url:
 126             self.set_url(url)
 127
 128         timer = Timer()
 129         timer.start()
 130         self.expert = gui_qt.ElectrumWindow(self.wallet, self.config)
 131         self.expert.app = self.app
 132         self.expert.connect_slots(timer)
 133         self.expert.update_wallet()
 134         self.app.exec_()
 135
 136     def server_list_changed(self):
 137         self.emit(SIGNAL("updateservers()"))
 138
 139     def expand(self):
 140         """Hide the lite mode window and show pro-mode."""
 141         self.mini.hide()
 142         self.expert.show()
 143
 144     def set_url(self, url):
 145         payto, amount, label, message, signature, identity, url = \
 146             self.wallet.parse_url(url, self.show_message, self.show_question)
 147         self.mini.set_payment_fields(payto, amount)
 148
 149     def show_message(self, message):
 150         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
 151
 152     def show_question(self, message):
 153         choice = QMessageBox.question(self.mini, _("Message"), message,
 154                                       QMessageBox.Yes|QMessageBox.No,
 155                                       QMessageBox.No)
 156         return choice == QMessageBox.Yes
 157
 158     def restore_or_create(self):
 159         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 160         return qt_gui_object.restore_or_create()
 161
 162 class MiniWindow(QDialog):
 163
 164     def __init__(self, actuator, expand_callback, config):
 165         super(MiniWindow, self).__init__()
 166
 167         self.actuator = actuator
 168         self.config = config
 169
 170         self.btc_balance = None
 171         self.quote_currencies = ["EUR", "USD", "GBP"]
 172         self.actuator.set_configured_currency(self.set_quote_currency)
 173         self.exchanger = exchange_rate.Exchanger(self)
 174         # Needed because price discovery is done in a different thread
 175         # which needs to be sent back to this main one to update the GUI
 176         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 177
 178         self.balance_label = BalanceLabel(self.change_quote_currency)
 179         self.balance_label.setObjectName("balance_label")
 180
 181         self.receive_button = QPushButton(_("&Receive"))
 182         self.receive_button.setObjectName("receive_button")
 183         self.receive_button.setDefault(True)
 184         self.receive_button.clicked.connect(self.copy_address)
 185
 186         # Bitcoin address code
 187         self.address_input = QLineEdit()
 188         self.address_input.setPlaceholderText(_("Enter a Bitcoin address..."))
 189         self.address_input.setObjectName("address_input")
 190
 191
 192         self.address_input.textEdited.connect(self.address_field_changed)
 193         resize_line_edit_width(self.address_input,
 194                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 195
 196         self.address_completions = QStringListModel()
 197         address_completer = QCompleter(self.address_input)
 198         address_completer.setCaseSensitivity(False)
 199         address_completer.setModel(self.address_completions)
 200         self.address_input.setCompleter(address_completer)
 201
 202         address_layout = QHBoxLayout()
 203         address_layout.addWidget(self.address_input)
 204
 205         self.amount_input = QLineEdit()
 206         self.amount_input.setPlaceholderText(_("... and amount"))
 207         self.amount_input.setObjectName("amount_input")
 208         # This is changed according to the user's displayed balance
 209         self.amount_validator = QDoubleValidator(self.amount_input)
 210         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 211         self.amount_validator.setDecimals(8)
 212         self.amount_input.setValidator(self.amount_validator)
 213
 214         # This removes the very ugly OSX highlighting, please leave this in :D
 215         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 216         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 217         self.amount_input.textChanged.connect(self.amount_input_changed)
 218
 219         self.send_button = QPushButton(_("&Send"))
 220         self.send_button.setObjectName("send_button")
 221         self.send_button.setDisabled(True);
 222         self.send_button.clicked.connect(self.send)
 223
 224         main_layout = QGridLayout(self)
 225
 226         main_layout.addWidget(self.balance_label, 0, 0)
 227         main_layout.addWidget(self.receive_button, 0, 1)
 228
 229         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 230
 231         main_layout.addWidget(self.amount_input, 2, 0)
 232         main_layout.addWidget(self.send_button, 2, 1)
 233
 234         self.history_list = history_widget.HistoryWidget()
 235         self.history_list.setObjectName("history")
 236         self.history_list.hide()
 237         self.history_list.setAlternatingRowColors(True)
 238         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 239
 240         menubar = QMenuBar()
 241         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 242
 243         servers_menu = electrum_menu.addMenu(_("&Servers"))
 244         servers_group = QActionGroup(self)
 245         self.actuator.set_servers_gui_stuff(servers_menu, servers_group)
 246         self.actuator.populate_servers_menu()
 247         electrum_menu.addSeparator()
 248
 249         brain_seed = electrum_menu.addAction(_("&BrainWallet Info"))
 250         brain_seed.triggered.connect(self.actuator.show_seed_dialog)
 251         quit_option = electrum_menu.addAction(_("&Quit"))
 252         quit_option.triggered.connect(self.close)
 253
 254         view_menu = menubar.addMenu(_("&View"))
 255         extra_menu = menubar.addMenu(_("&Extra"))
 256
 257         backup_wallet = extra_menu.addAction( _("&Create wallet backup"))
 258         backup_wallet.triggered.connect(self.backup_wallet)
 259
 260         export_csv = extra_menu.addAction( _("&Export transactions to CSV") )
 261         export_csv.triggered.connect(self.actuator.csv_transaction)
 262
 263         expert_gui = view_menu.addAction(_("&Classic GUI"))
 264         expert_gui.triggered.connect(expand_callback)
 265         themes_menu = view_menu.addMenu(_("&Themes"))
 266         selected_theme = self.actuator.selected_theme()
 267         theme_group = QActionGroup(self)
 268         for theme_name in self.actuator.theme_names():
 269             theme_action = themes_menu.addAction(theme_name)
 270             theme_action.setCheckable(True)
 271             if selected_theme == theme_name:
 272                 theme_action.setChecked(True)
 273             class SelectThemeFunctor:
 274                 def __init__(self, theme_name, toggle_theme):
 275                     self.theme_name = theme_name
 276                     self.toggle_theme = toggle_theme
 277                 def __call__(self, checked):
 278                     if checked:
 279                         self.toggle_theme(self.theme_name)
 280             delegate = SelectThemeFunctor(theme_name, self.toggle_theme)
 281             theme_action.toggled.connect(delegate)
 282             theme_group.addAction(theme_action)
 283         view_menu.addSeparator()
 284         show_history = view_menu.addAction(_("Show History"))
 285         show_history.setCheckable(True)
 286         show_history.toggled.connect(self.show_history)
 287
 288         help_menu = menubar.addMenu(_("&Help"))
 289         the_website = help_menu.addAction(_("&Website"))
 290         the_website.triggered.connect(self.the_website)
 291         help_menu.addSeparator()
 292         report_bug = help_menu.addAction(_("&Report Bug"))
 293         report_bug.triggered.connect(self.show_report_bug)
 294         show_about = help_menu.addAction(_("&About"))
 295         show_about.triggered.connect(self.show_about)
 296         main_layout.setMenuBar(menubar)
 297
 298         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 299         quit_shortcut.activated.connect(self.close)
 300         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 301         close_shortcut.activated.connect(self.close)
 302
 303         g = self.config.get("winpos-lite",[4, 25, 351, 149])
 304         self.setGeometry(g[0], g[1], g[2], g[3])
 305
 306         show_hist = self.config.get("gui_show_history",False)
 307         show_history.setChecked(show_hist)
 308         self.show_history(show_hist)
 309
 310         self.setWindowIcon(QIcon(":electrum.png"))
 311         self.setWindowTitle("Electrum")
 312         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 313         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 314         self.setObjectName("main_window")
 315         self.show()
 316
 317     def toggle_theme(self, theme_name):
 318         old_path = QDir.currentPath()
 319         self.actuator.change_theme(theme_name)
 320         # Recompute style globally
 321         qApp.style().unpolish(self)
 322         qApp.style().polish(self)
 323         QDir.setCurrent(old_path)
 324
 325     def closeEvent(self, event):
 326         g = self.geometry()
 327         self.config.set_key("winpos-lite", [g.left(),g.top(),g.width(),g.height()],True)
 328         self.config.set_key("gui_show_history", self.history_list.isVisible(),True)
 329
 330         super(MiniWindow, self).closeEvent(event)
 331         qApp.quit()
 332
 333     def set_payment_fields(self, dest_address, amount):
 334         self.address_input.setText(dest_address)
 335         self.address_field_changed(dest_address)
 336         self.amount_input.setText(amount)
 337
 338     def activate(self):
 339         pass
 340
 341     def deactivate(self):
 342         pass
 343
 344     def set_quote_currency(self, currency):
 345         """Set and display the fiat currency country."""
 346         assert currency in self.quote_currencies
 347         self.quote_currencies.remove(currency)
 348         self.quote_currencies.insert(0, currency)
 349         self.refresh_balance()
 350
 351     def change_quote_currency(self):
 352         self.quote_currencies = \
 353             self.quote_currencies[1:] + self.quote_currencies[0:1]
 354         self.actuator.set_config_currency(self.quote_currencies[0])
 355         self.refresh_balance()
 356
 357     def refresh_balance(self):
 358         if self.btc_balance is None:
 359             # Price has been discovered before wallet has been loaded
 360             # and server connect... so bail.
 361             return
 362         self.set_balances(self.btc_balance)
 363         self.amount_input_changed(self.amount_input.text())
 364
 365     def set_balances(self, btc_balance):
 366         """Set the bitcoin balance and update the amount label accordingly."""
 367         self.btc_balance = btc_balance
 368         quote_text = self.create_quote_text(btc_balance)
 369         if quote_text:
 370             quote_text = "(%s)" % quote_text
 371         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 372         self.balance_label.set_balance_text(btc_balance, quote_text)
 373         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 374
 375     def amount_input_changed(self, amount_text):
 376         """Update the number of bitcoins displayed."""
 377         self.check_button_status()
 378
 379         try:
 380             amount = D(str(amount_text))
 381         except decimal.InvalidOperation:
 382             self.balance_label.show_balance()
 383         else:
 384             quote_text = self.create_quote_text(amount * bitcoin(1))
 385             if quote_text:
 386                 self.balance_label.set_amount_text(quote_text)
 387                 self.balance_label.show_amount()
 388             else:
 389                 self.balance_label.show_balance()
 390
 391     def create_quote_text(self, btc_balance):
 392         """Return a string copy of the amount fiat currency the
 393         user has in bitcoins."""
 394         quote_currency = self.quote_currencies[0]
 395         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 396         if quote_balance is None:
 397             quote_text = ""
 398         else:
 399             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 400                                       quote_currency)
 401         return quote_text
 402
 403     def send(self):
 404         if self.actuator.send(self.address_input.text(),
 405                               self.amount_input.text(), self):
 406             self.address_input.setText("")
 407             self.amount_input.setText("")
 408
 409     def check_button_status(self):
 410         """Check that the bitcoin address is valid and that something
 411         is entered in the amount before making the send button clickable."""
 412         try:
 413             value = D(str(self.amount_input.text())) * 10**8
 414         except decimal.InvalidOperation:
 415             value = None
 416         # self.address_input.property(...) returns a qVariant, not a bool.
 417         # The == is needed to properly invoke a comparison.
 418         if (self.address_input.property("isValid") == True and
 419             value is not None and 0 < value <= self.btc_balance):
 420             self.send_button.setDisabled(False)
 421         else:
 422             self.send_button.setDisabled(True)
 423
 424     def address_field_changed(self, address):
 425         if self.actuator.is_valid(address):
 426             self.check_button_status()
 427             self.address_input.setProperty("isValid", True)
 428             self.recompute_style(self.address_input)
 429         else:
 430             self.send_button.setDisabled(True)
 431             self.address_input.setProperty("isValid", False)
 432             self.recompute_style(self.address_input)
 433
 434         if len(address) == 0:
 435             self.address_input.setProperty("isValid", None)
 436             self.recompute_style(self.address_input)
 437
 438     def recompute_style(self, element):
 439         self.style().unpolish(element)
 440         self.style().polish(element)
 441
 442     def copy_address(self):
 443         receive_popup = ReceivePopup(self.receive_button)
 444         self.actuator.copy_address(receive_popup)
 445
 446     def update_completions(self, completions):
 447         self.address_completions.setStringList(completions)
 448
 449     def update_history(self, tx_history):
 450         from util import format_satoshis
 451         for item in tx_history[-10:]:
 452             tx_hash, conf, is_mine, value, fee, balance, timestamp = item
 453             label = self.actuator.wallet.get_label(tx_hash)[0]
 454             #amount = D(value) / 10**8
 455             v_str = format_satoshis(value, True)
 456             self.history_list.append(label, v_str)
 457
 458     def acceptbit(self):
 459         self.actuator.acceptbit(self.quote_currencies[0])
 460
 461     def the_website(self):
 462         webbrowser.open("http://electrum-desktop.com")
 463
 464     def show_about(self):
 465         QMessageBox.about(self, "Electrum",
 466             _("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"))
 467
 468     def show_report_bug(self):
 469         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 470             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 471
 472     def show_history(self, toggle_state):
 473         if toggle_state:
 474             self.history_list.show()
 475         else:
 476             self.history_list.hide()
 477
 478     def backup_wallet(self):
 479         try:
 480           folderName = QFileDialog.getExistingDirectory(QWidget(), 'Select folder to save a copy of your wallet to', os.path.expanduser('~/'))
 481           if folderName:
 482             sourceFile = util.user_dir() + '/electrum.dat'
 483             shutil.copy2(sourceFile, str(folderName))
 484             QMessageBox.information(None,"Wallet backup created", "A copy of your wallet file was created in '%s'" % str(folderName))
 485         except (IOError, os.error), reason:
 486           QMessageBox.critical(None,"Unable to create backup", "Electrum was unable copy your wallet file to the specified location.\n" + str(reason))
 487
 488
 489
 490
 491 class BalanceLabel(QLabel):
 492
 493     SHOW_CONNECTING = 1
 494     SHOW_BALANCE = 2
 495     SHOW_AMOUNT = 3
 496
 497     def __init__(self, change_quote_currency, parent=None):
 498         super(QLabel, self).__init__(_("Connecting..."), parent)
 499         self.change_quote_currency = change_quote_currency
 500         self.state = self.SHOW_CONNECTING
 501         self.balance_text = ""
 502         self.amount_text = ""
 503
 504     def mousePressEvent(self, event):
 505         """Change the fiat currency selection if window background is clicked."""
 506         if self.state != self.SHOW_CONNECTING:
 507             self.change_quote_currency()
 508
 509     def set_balance_text(self, btc_balance, quote_text):
 510         """Set the amount of bitcoins in the gui."""
 511         if self.state == self.SHOW_CONNECTING:
 512             self.state = self.SHOW_BALANCE
 513         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)
 514         if self.state == self.SHOW_BALANCE:
 515             self.setText(self.balance_text)
 516
 517     def set_amount_text(self, quote_text):
 518         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 519         if self.state == self.SHOW_AMOUNT:
 520             self.setText(self.amount_text)
 521
 522     def show_balance(self):
 523         if self.state == self.SHOW_AMOUNT:
 524             self.state = self.SHOW_BALANCE
 525             self.setText(self.balance_text)
 526
 527     def show_amount(self):
 528         if self.state == self.SHOW_BALANCE:
 529             self.state = self.SHOW_AMOUNT
 530             self.setText(self.amount_text)
 531
 532 def ok_cancel_buttons(dialog):
 533     row_layout = QHBoxLayout()
 534     row_layout.addStretch(1)
 535     ok_button = QPushButton(_("OK"))
 536     row_layout.addWidget(ok_button)
 537     ok_button.clicked.connect(dialog.accept)
 538     cancel_button = QPushButton(_("Cancel"))
 539     row_layout.addWidget(cancel_button)
 540     cancel_button.clicked.connect(dialog.reject)
 541     return row_layout
 542
 543 class PasswordDialog(QDialog):
 544
 545     def __init__(self, parent):
 546         super(QDialog, self).__init__(parent)
 547
 548         self.setModal(True)
 549
 550         self.password_input = QLineEdit()
 551         self.password_input.setEchoMode(QLineEdit.Password)
 552
 553         main_layout = QVBoxLayout(self)
 554         message = _('Please enter your password')
 555         main_layout.addWidget(QLabel(message))
 556
 557         grid = QGridLayout()
 558         grid.setSpacing(8)
 559         grid.addWidget(QLabel(_('Password')), 1, 0)
 560         grid.addWidget(self.password_input, 1, 1)
 561         main_layout.addLayout(grid)
 562
 563         main_layout.addLayout(ok_cancel_buttons(self))
 564         self.setLayout(main_layout)
 565
 566     def run(self):
 567         if not self.exec_():
 568             return
 569         return unicode(self.password_input.text())
 570
 571 class ReceivePopup(QDialog):
 572
 573     def leaveEvent(self, event):
 574         self.close()
 575
 576     def setup(self, address):
 577         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 578         address_display = QLineEdit(address)
 579         address_display.setReadOnly(True)
 580         resize_line_edit_width(address_display, address)
 581
 582         main_layout = QVBoxLayout(self)
 583         main_layout.addWidget(label)
 584         main_layout.addWidget(address_display)
 585
 586         self.setMouseTracking(True)
 587         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 588         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|
 589                             Qt.MSWindowsFixedSizeDialogHint)
 590         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 591         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 592         #self.setAlignment(Qt.AlignCenter)
 593
 594     def popup(self):
 595         parent = self.parent()
 596         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 597         self.move(top_left_pos)
 598         center_mouse_pos = self.mapToGlobal(self.rect().center())
 599         QCursor.setPos(center_mouse_pos)
 600         self.show()
 601
 602 class MiniActuator:
 603     """Initialize the definitions relating to themes and
 604     sending/recieving bitcoins."""
 605
 606
 607     def __init__(self, wallet):
 608         """Retrieve the gui theme used in previous session."""
 609         self.wallet = wallet
 610         self.theme_name = self.wallet.config.get('litegui_theme','Cleanlook')
 611         self.themes = load_theme_paths()
 612
 613     def load_theme(self):
 614         """Load theme retrieved from wallet file."""
 615         try:
 616             theme_prefix, theme_path = self.themes[self.theme_name]
 617         except KeyError:
 618             util.print_error("Theme not found!", self.theme_name)
 619             return
 620         QDir.setCurrent(os.path.join(theme_prefix, theme_path))
 621         with open(rsrc("style.css")) as style_file:
 622             qApp.setStyleSheet(style_file.read())
 623
 624     def theme_names(self):
 625         """Sort themes."""
 626         return sorted(self.themes.keys())
 627
 628     def selected_theme(self):
 629         """Select theme."""
 630         return self.theme_name
 631
 632     def change_theme(self, theme_name):
 633         """Change theme."""
 634         self.theme_name = theme_name
 635         self.wallet.config.set_key('litegui_theme',theme_name)
 636         self.load_theme()
 637
 638     def set_configured_currency(self, set_quote_currency):
 639         """Set the inital fiat currency conversion country (USD/EUR/GBP) in
 640         the GUI to what it was set to in the wallet."""
 641         currency = self.wallet.config.get('conversion_currency')
 642         # currency can be none when Electrum is used for the first
 643         # time and no setting has been created yet.
 644         if currency is not None:
 645             set_quote_currency(currency)
 646
 647     def set_config_currency(self, conversion_currency):
 648         """Change the wallet fiat currency country."""
 649         self.wallet.config.set_key('conversion_currency',conversion_currency,True)
 650
 651     def set_servers_gui_stuff(self, servers_menu, servers_group):
 652         self.servers_menu = servers_menu
 653         self.servers_group = servers_group
 654
 655     def populate_servers_menu(self):
 656         interface = self.wallet.interface
 657         if not interface.servers:
 658             print "No servers loaded yet."
 659             self.servers_list = []
 660             for server_string in DEFAULT_SERVERS:
 661                 host, port, protocol = server_string.split(':')
 662                 transports = [(protocol,port)]
 663                 self.servers_list.append((host, transports))
 664         else:
 665             print "Servers loaded."
 666             self.servers_list = interface.servers
 667         server_names = [details[0] for details in self.servers_list]
 668         current_server = interface.server.split(":")[0]
 669         for server_name in server_names:
 670             server_action = self.servers_menu.addAction(server_name)
 671             server_action.setCheckable(True)
 672             if server_name == current_server:
 673                 server_action.setChecked(True)
 674             class SelectServerFunctor:
 675                 def __init__(self, server_name, server_selected):
 676                     self.server_name = server_name
 677                     self.server_selected = server_selected
 678                 def __call__(self, checked):
 679                     if checked:
 680                         # call server_selected
 681                         self.server_selected(self.server_name)
 682             delegate = SelectServerFunctor(server_name, self.server_selected)
 683             server_action.toggled.connect(delegate)
 684             self.servers_group.addAction(server_action)
 685
 686     def update_servers_list(self):
 687         # Clear servers_group
 688         for action in self.servers_group.actions():
 689             self.servers_group.removeAction(action)
 690         self.populate_servers_menu()
 691
 692     def server_selected(self, server_name):
 693         match = [transports for (host, transports) in self.servers_list
 694                  if host == server_name]
 695         assert len(match) == 1
 696         match = match[0]
 697         # Default to TCP if available else use anything
 698         # TODO: protocol should be selectable.
 699         tcp_port = [port for (protocol, port) in match if protocol == "t"]
 700         if len(tcp_port) == 0:
 701             protocol = match[0][0]
 702             port = match[0][1]
 703         else:
 704             protocol = "t"
 705             port = tcp_port[0]
 706         server_line = "%s:%s:%s" % (server_name, port, protocol)
 707
 708         # Should this have exception handling?
 709         self.wallet.interface.set_server(server_line, self.wallet.config.get("proxy"))
 710
 711     def copy_address(self, receive_popup):
 712         """Copy the wallet addresses into the client."""
 713         addrs = [addr for addr in self.wallet.all_addresses()
 714                  if not self.wallet.is_change(addr)]
 715         # Select most recent addresses from gap limit
 716         addrs = addrs[-self.wallet.gap_limit:]
 717         copied_address = random.choice(addrs)
 718         qApp.clipboard().setText(copied_address)
 719         receive_popup.setup(copied_address)
 720         receive_popup.popup()
 721
 722     def waiting_dialog(self, f):
 723         s = Timer()
 724         s.start()
 725         w = QDialog()
 726         w.resize(200, 70)
 727         w.setWindowTitle('Electrum')
 728         l = QLabel('Sending transaction, please wait.')
 729         vbox = QVBoxLayout()
 730         vbox.addWidget(l)
 731         w.setLayout(vbox)
 732         w.show()
 733         def ff():
 734             s = f()
 735             if s: l.setText(s)
 736             else: w.close()
 737         w.connect(s, QtCore.SIGNAL('timersignal'), ff)
 738         w.exec_()
 739         w.destroy()
 740
 741     def csv_transaction(self):
 742         try:
 743           fileName = QFileDialog.getSaveFileName(QWidget(), 'Select file to export your wallet transactions to', os.path.expanduser('~/'), "*.csv")
 744           if fileName:
 745             with open(fileName, "w+") as csvfile:
 746                 transaction = csv.writer(csvfile)
 747                 transaction.writerow(["transaction_hash","label", "confirmations", "value", "fee", "balance", "timestamp"])
 748                 for item in self.wallet.get_tx_history():
 749                     tx_hash, confirmations, is_mine, value, fee, balance, timestamp = item
 750                     if confirmations:
 751                         if timestamp is not None:
 752                             try:
 753                                 time_string = datetime.datetime.fromtimestamp( timestamp).isoformat(' ')[:-3]
 754                             except [RuntimeError, TypeError, NameError] as reason:
 755                                 time_string = "unknown"
 756                                 pass
 757                     else:
 758                         time_string = "pending"
 759
 760                     if value is not None:
 761                         value_string = format_satoshis(value, True, self.wallet.num_zeros)
 762                     else:
 763                         value_string = '--'
 764
 765                     if fee is not None:
 766                         fee_string = format_satoshis(fee, True, self.wallet.num_zeros)
 767                     else:
 768                         fee_string = '0'
 769
 770                     if tx_hash:
 771                         label, is_default_label = self.wallet.get_label(tx_hash)
 772                     else:
 773                       label = ""
 774
 775                     balance_string = format_satoshis(balance, False, self.wallet.num_zeros)
 776                     transaction.writerow([tx_hash, label, confirmations, value_string, fee_string, balance_string, time_string])
 777                 QMessageBox.information(None,"CSV Export created", "Your CSV export has been succesfully created.")
 778         except (IOError, os.error), reason:
 779           QMessageBox.critical(None,"Unable to create csv", "Electrum was unable to produce a transaction export.\n" + str(reason))
 780
 781     def send(self, address, amount, parent_window):
 782         """Send bitcoins to the target address."""
 783         dest_address = self.fetch_destination(address)
 784
 785         if dest_address is None or not self.wallet.is_valid(dest_address):
 786             QMessageBox.warning(parent_window, _('Error'),
 787                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 788             return False
 789
 790         convert_amount = lambda amount: \
 791             int(D(unicode(amount)) * bitcoin(1))
 792         amount = convert_amount(amount)
 793
 794         if self.wallet.use_encryption:
 795             password_dialog = PasswordDialog(parent_window)
 796             password = password_dialog.run()
 797             if not password:
 798                 return
 799         else:
 800             password = None
 801
 802         fee = 0
 803         # 0.1 BTC = 10000000
 804         if amount < bitcoin(1) / 10:
 805             # 0.001 BTC
 806             fee = bitcoin(1) / 1000
 807
 808         try:
 809             tx = self.wallet.mktx([(dest_address, amount)], "", password, fee)
 810         except BaseException as error:
 811             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 812             return False
 813
 814         h = self.wallet.send_tx(tx)
 815
 816         self.waiting_dialog(lambda: False if self.wallet.tx_event.isSet() else _("Sending transaction, please wait..."))
 817
 818         status, message = self.wallet.receive_tx(h)
 819
 820         if not status:
 821             import tempfile
 822             dumpf = tempfile.NamedTemporaryFile(delete=False)
 823             dumpf.write(tx)
 824             dumpf.close()
 825             print "Dumped error tx to", dumpf.name
 826             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 827             return False
 828
 829         QMessageBox.information(parent_window, '',
 830             _('Your transaction has been sent.') + '\n' + message, _('OK'))
 831         return True
 832
 833     def fetch_destination(self, address):
 834         recipient = unicode(address).strip()
 835
 836         # alias
 837         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 838                           recipient)
 839
 840         # label or alias, with address in brackets
 841         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 842                           recipient)
 843
 844         if match1:
 845             dest_address = \
 846                 self.wallet.get_alias(recipient, True,
 847                                       self.show_message, self.question)
 848             return dest_address
 849         elif match2:
 850             return match2.group(2)
 851         else:
 852             return recipient
 853
 854     def is_valid(self, address):
 855         """Check if bitcoin address is valid."""
 856         return self.wallet.is_valid(address)
 857
 858     def acceptbit(self, currency):
 859         master_pubkey = self.wallet.master_public_key
 860         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 861         webbrowser.open(url)
 862
 863     def show_seed_dialog(self):
 864         gui_qt.ElectrumWindow.show_seed_dialog(self.wallet)
 865
 866 class MiniDriver(QObject):
 867
 868     INITIALIZING = 0
 869     CONNECTING = 1
 870     SYNCHRONIZING = 2
 871     READY = 3
 872
 873     def __init__(self, wallet, window):
 874         super(QObject, self).__init__()
 875
 876         self.wallet = wallet
 877         self.window = window
 878
 879         self.wallet.interface.register_callback('updated',self.update_callback)
 880         self.wallet.interface.register_callback('connected', self.update_callback)
 881         self.wallet.interface.register_callback('disconnected', self.update_callback)
 882
 883         self.state = None
 884
 885         self.initializing()
 886         self.connect(self, SIGNAL("updatesignal()"), self.update)
 887         self.update_callback()
 888
 889     # This is a hack to workaround that Qt does not like changing the
 890     # window properties from this other thread before the runloop has
 891     # been called from.
 892     def update_callback(self):
 893         self.emit(SIGNAL("updatesignal()"))
 894
 895     def update(self):
 896         if not self.wallet.interface:
 897             self.initializing()
 898         elif not self.wallet.interface.is_connected:
 899             self.connecting()
 900         elif not self.wallet.up_to_date:
 901             self.synchronizing()
 902         else:
 903             self.ready()
 904
 905         if self.wallet.up_to_date:
 906             self.update_balance()
 907             self.update_completions()
 908             self.update_history()
 909
 910     def initializing(self):
 911         if self.state == self.INITIALIZING:
 912             return
 913         self.state = self.INITIALIZING
 914         self.window.deactivate()
 915
 916     def connecting(self):
 917         if self.state == self.CONNECTING:
 918             return
 919         self.state = self.CONNECTING
 920         self.window.deactivate()
 921
 922     def synchronizing(self):
 923         if self.state == self.SYNCHRONIZING:
 924             return
 925         self.state = self.SYNCHRONIZING
 926         self.window.deactivate()
 927
 928     def ready(self):
 929         if self.state == self.READY:
 930             return
 931         self.state = self.READY
 932         self.window.activate()
 933
 934     def update_balance(self):
 935         conf_balance, unconf_balance = self.wallet.get_balance()
 936         balance = D(conf_balance + unconf_balance)
 937         self.window.set_balances(balance)
 938
 939     def update_completions(self):
 940         completions = []
 941         for addr, label in self.wallet.labels.items():
 942             if addr in self.wallet.addressbook:
 943                 completions.append("%s <%s>" % (label, addr))
 944         completions = completions + self.wallet.aliases.keys()
 945         self.window.update_completions(completions)
 946
 947     def update_history(self):
 948         tx_history = self.wallet.get_tx_history()
 949         self.window.update_history(tx_history)
 950
 951 if __name__ == "__main__":
 952     app = QApplication(sys.argv)
 953     with open(rsrc("style.css")) as style_file:
 954         app.setStyleSheet(style_file.read())
 955     mini = MiniWindow()
 956     sys.exit(app.exec_())
 957