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