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 receiving_widget
  30 import util
  31 import csv
  32 import datetime
  33
  34 from version import ELECTRUM_VERSION as electrum_version
  35 from wallet import format_satoshis
  36 import gui_qt
  37 import shutil
  38
  39 bitcoin = lambda v: v * 100000000
  40
  41 def IconButton(filename, parent=None):
  42     pixmap = QPixmap(filename)
  43     icon = QIcon(pixmap)
  44     return QPushButton(icon, "", parent)
  45
  46 class Timer(QThread):
  47     def run(self):
  48         while True:
  49             self.emit(SIGNAL('timersignal'))
  50             time.sleep(0.5)
  51
  52 def resize_line_edit_width(line_edit, text_input):
  53     metrics = QFontMetrics(qApp.font())
  54     # Create an extra character to add some space on the end
  55     text_input += "A"
  56     line_edit.setMinimumWidth(metrics.width(text_input))
  57
  58 def load_theme_name(theme_path):
  59     try:
  60         with open(os.path.join(theme_path, "name.cfg")) as name_cfg_file:
  61             return name_cfg_file.read().rstrip("\n").strip()
  62     except IOError:
  63         return None
  64
  65
  66 def theme_dirs_from_prefix(prefix):
  67     if not os.path.exists(prefix):
  68         return []
  69     theme_paths = {}
  70     for potential_theme in os.listdir(prefix):
  71         theme_full_path = os.path.join(prefix, potential_theme)
  72         theme_css = os.path.join(theme_full_path, "style.css")
  73         if not os.path.exists(theme_css):
  74             continue
  75         theme_name = load_theme_name(theme_full_path)
  76         if theme_name is None:
  77             continue
  78         theme_paths[theme_name] = prefix, potential_theme
  79     return theme_paths
  80
  81 def load_theme_paths():
  82     theme_paths = {}
  83     prefixes = (util.local_data_dir(), util.appdata_dir())
  84     for prefix in prefixes:
  85         theme_paths.update(theme_dirs_from_prefix(prefix))
  86     return theme_paths
  87
  88
  89 def csv_transaction(wallet):
  90     try:
  91         fileName = QFileDialog.getSaveFileName(QWidget(), 'Select file to export your wallet transactions to', os.path.expanduser('~/'), "*.csv")
  92         if fileName:
  93             with open(fileName, "w+") as csvfile:
  94                 transaction = csv.writer(csvfile)
  95                 transaction.writerow(["transaction_hash","label", "confirmations", "value", "fee", "balance", "timestamp"])
  96                 for item in wallet.get_tx_history():
  97                     tx_hash, confirmations, is_mine, value, fee, balance, timestamp = item
  98                     if confirmations:
  99                         if timestamp is not None:
 100                             try:
 101                                 time_string = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
 102                             except [RuntimeError, TypeError, NameError] as reason:
 103                                 time_string = "unknown"
 104                                 pass
 105                         else:
 106                           time_string = "unknown"
 107                     else:
 108                         time_string = "pending"
 109
 110                     if value is not None:
 111                         value_string = format_satoshis(value, True, wallet.num_zeros)
 112                     else:
 113                         value_string = '--'
 114
 115                     if fee is not None:
 116                         fee_string = format_satoshis(fee, True, wallet.num_zeros)
 117                     else:
 118                         fee_string = '0'
 119
 120                     if tx_hash:
 121                         label, is_default_label = wallet.get_label(tx_hash)
 122                     else:
 123                       label = ""
 124
 125                     balance_string = format_satoshis(balance, False, wallet.num_zeros)
 126                     transaction.writerow([tx_hash, label, confirmations, value_string, fee_string, balance_string, time_string])
 127                 QMessageBox.information(None,"CSV Export created", "Your CSV export has been succesfully created.")
 128     except (IOError, os.error), reason:
 129         QMessageBox.critical(None,"Unable to create csv", "Electrum was unable to produce a transaction export.\n" + str(reason))
 130
 131
 132 class ElectrumGui(QObject):
 133
 134     def __init__(self, wallet, config, expert=None):
 135         super(QObject, self).__init__()
 136
 137         self.wallet = wallet
 138         self.config = config
 139         self.check_qt_version()
 140         self.expert = expert
 141         if self.expert != None:
 142             self.app = self.expert.app
 143         else:
 144             self.app = QApplication(sys.argv)
 145
 146     def check_qt_version(self):
 147         qtVersion = qVersion()
 148         if not(int(qtVersion[0]) >= 4 and int(qtVersion[2]) >= 7):
 149             app = QApplication(sys.argv)
 150             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")
 151             self.config.set_key('gui','classic',True)
 152             sys.exit(0)
 153
 154
 155     def main(self, url):
 156         actuator = MiniActuator(self.wallet)
 157         # Should probably not modify the current path but instead
 158         # change the behaviour of rsrc(...)
 159         old_path = QDir.currentPath()
 160         actuator.load_theme()
 161
 162         self.mini = MiniWindow(actuator, self.expand, self.config)
 163         driver = MiniDriver(self.wallet, self.mini)
 164
 165         # Reset path back to original value now that loading the GUI
 166         # is completed.
 167         QDir.setCurrent(old_path)
 168
 169         if url:
 170             self.set_url(url)
 171
 172         if self.expert == None:
 173             timer = Timer()
 174             timer.start()
 175             self.expert = gui_qt.ElectrumWindow(self.wallet, self.config)
 176             self.expert.app = self.app
 177             self.expert.connect_slots(timer)
 178             self.expert.update_wallet()
 179             self.app.exec_()
 180
 181     def expand(self):
 182         """Hide the lite mode window and show pro-mode."""
 183         self.mini.hide()
 184         self.expert.show()
 185
 186     def set_url(self, url):
 187         payto, amount, label, message, signature, identity, url = \
 188             self.wallet.parse_url(url, self.show_message, self.show_question)
 189         self.mini.set_payment_fields(payto, amount)
 190
 191     def show_message(self, message):
 192         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
 193
 194     def show_question(self, message):
 195         choice = QMessageBox.question(self.mini, _("Message"), message,
 196                                       QMessageBox.Yes|QMessageBox.No,
 197                                       QMessageBox.No)
 198         return choice == QMessageBox.Yes
 199
 200     def restore_or_create(self):
 201         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 202         return qt_gui_object.restore_or_create()
 203
 204 class TransactionWindow(QDialog):
 205
 206     def set_label(self):
 207         label = unicode(self.label_edit.text())
 208         self.parent.wallet.labels[self.tx_id] = label
 209
 210         super(TransactionWindow, self).accept()
 211
 212     def __init__(self, transaction_id, parent):
 213         super(TransactionWindow, self).__init__()
 214
 215         self.tx_id = str(transaction_id)
 216         self.parent = parent
 217
 218         self.setModal(True)
 219         self.resize(200,100)
 220         self.setWindowTitle("Transaction successfully sent")
 221
 222         self.layout = QGridLayout(self)
 223         self.layout.addWidget(QLabel("Your transaction has been sent.\nPlease enter a label for this transaction for future reference."))
 224
 225         self.label_edit = QLineEdit()
 226         self.label_edit.setPlaceholderText(_("Transaction label"))
 227         self.label_edit.setObjectName("label_input")
 228         self.label_edit.setAttribute(Qt.WA_MacShowFocusRect, 0)
 229         self.label_edit.setFocusPolicy(Qt.ClickFocus)
 230         self.layout.addWidget(self.label_edit)
 231
 232         self.save_button = QPushButton(_("Save"))
 233         self.layout.addWidget(self.save_button)
 234         self.save_button.clicked.connect(self.set_label)
 235
 236         self.exec_()
 237
 238 class MiniWindow(QDialog):
 239
 240     def __init__(self, actuator, expand_callback, config):
 241         super(MiniWindow, self).__init__()
 242         tx = "e08115d0f7819aee65b9d24f81ef9d46eb62bb67ddef5318156cbc3ceb7b703e"
 243
 244         self.actuator = actuator
 245         self.config = config
 246         self.btc_balance = None
 247         self.quote_currencies = ["BRL", "CNY", "EUR", "GBP", "RUB", "USD"]
 248         self.actuator.set_configured_currency(self.set_quote_currency)
 249         self.exchanger = exchange_rate.Exchanger(self)
 250         # Needed because price discovery is done in a different thread
 251         # which needs to be sent back to this main one to update the GUI
 252         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 253
 254         self.balance_label = BalanceLabel(self.change_quote_currency)
 255         self.balance_label.setObjectName("balance_label")
 256
 257
 258         # Bitcoin address code
 259         self.address_input = QLineEdit()
 260         self.address_input.setPlaceholderText(_("Enter a Bitcoin address or contact"))
 261         self.address_input.setObjectName("address_input")
 262
 263         self.address_input.setFocusPolicy(Qt.ClickFocus)
 264
 265         self.address_input.textChanged.connect(self.address_field_changed)
 266         resize_line_edit_width(self.address_input,
 267                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 268
 269         self.address_completions = QStringListModel()
 270         address_completer = QCompleter(self.address_input)
 271         address_completer.setCaseSensitivity(False)
 272         address_completer.setModel(self.address_completions)
 273         self.address_input.setCompleter(address_completer)
 274
 275         address_layout = QHBoxLayout()
 276         address_layout.addWidget(self.address_input)
 277
 278         self.amount_input = QLineEdit()
 279         self.amount_input.setPlaceholderText(_("... and amount"))
 280         self.amount_input.setObjectName("amount_input")
 281
 282         self.amount_input.setFocusPolicy(Qt.ClickFocus)
 283         # This is changed according to the user's displayed balance
 284         self.amount_validator = QDoubleValidator(self.amount_input)
 285         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 286         self.amount_validator.setDecimals(8)
 287         self.amount_input.setValidator(self.amount_validator)
 288
 289         # This removes the very ugly OSX highlighting, please leave this in :D
 290         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 291         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 292         self.amount_input.textChanged.connect(self.amount_input_changed)
 293
 294         self.send_button = QPushButton(_("&Send"))
 295         self.send_button.setObjectName("send_button")
 296         self.send_button.setDisabled(True);
 297         self.send_button.clicked.connect(self.send)
 298
 299         # Creating the receive button
 300         self.receive_button = QPushButton(_("&Receive"))
 301         self.receive_button.setObjectName("receive_button")
 302         self.receive_button.setDefault(True)
 303
 304         main_layout = QGridLayout(self)
 305
 306         main_layout.addWidget(self.balance_label, 0, 0)
 307         main_layout.addWidget(self.receive_button, 0, 1)
 308
 309         main_layout.addWidget(self.address_input, 1, 0)
 310
 311         main_layout.addWidget(self.amount_input, 2, 0)
 312         main_layout.addWidget(self.send_button, 2, 1)
 313
 314         self.history_list = history_widget.HistoryWidget()
 315         self.history_list.setObjectName("history")
 316         self.history_list.hide()
 317         self.history_list.setAlternatingRowColors(True)
 318
 319         main_layout.addWidget(self.history_list, 3, 0, 1, 2)
 320
 321
 322         self.receiving = receiving_widget.ReceivingWidget(self)
 323         self.receiving.setObjectName("receiving")
 324
 325         # Add to the right side
 326         self.receiving_box = QGroupBox(_("Select a receiving address"))
 327         extra_layout = QGridLayout()
 328
 329         # Checkbox to filter used addresses
 330         hide_used = QCheckBox(_('Hide used addresses'))
 331         hide_used.setChecked(True)
 332         hide_used.stateChanged.connect(self.receiving.toggle_used)
 333
 334         # Events for receiving addresses
 335         self.receiving.clicked.connect(self.receiving.copy_address)
 336         self.receiving.itemDoubleClicked.connect(self.receiving.edit_label)
 337         self.receiving.itemChanged.connect(self.receiving.update_label)
 338
 339         # Label
 340         extra_layout.addWidget( QLabel(_('Selecting an address will copy it to the clipboard.\nDouble clicking the label will allow you to edit it.') ),0,0)
 341
 342         extra_layout.addWidget(self.receiving, 1,0)
 343         extra_layout.addWidget(hide_used, 2,0)
 344         extra_layout.setColumnMinimumWidth(0,200)
 345
 346         self.receiving_box.setLayout(extra_layout)
 347         main_layout.addWidget(self.receiving_box,0,3,-1,3)
 348         self.receiving_box.hide()
 349
 350         self.receive_button.clicked.connect(self.toggle_receiving_layout)
 351
 352         # Creating the menu bar
 353         menubar = QMenuBar()
 354         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 355
 356         electrum_menu.addSeparator()
 357
 358         quit_option = electrum_menu.addAction(_("&Quit"))
 359         quit_option.triggered.connect(self.close)
 360
 361         view_menu = menubar.addMenu(_("&View"))
 362         extra_menu = menubar.addMenu(_("&Extra"))
 363
 364         backup_wallet = extra_menu.addAction( _("&Create wallet backup"))
 365         backup_wallet.triggered.connect(self.backup_wallet)
 366
 367         export_csv = extra_menu.addAction( _("&Export transactions to CSV") )
 368         export_csv.triggered.connect(lambda: csv_transaction(self.wallet))
 369
 370         master_key = extra_menu.addAction( _("Copy master public key to clipboard") )
 371         master_key.triggered.connect(self.actuator.copy_master_public_key)
 372
 373         expert_gui = view_menu.addAction(_("&Classic GUI"))
 374         expert_gui.triggered.connect(expand_callback)
 375         themes_menu = view_menu.addMenu(_("&Themes"))
 376         selected_theme = self.actuator.selected_theme()
 377         theme_group = QActionGroup(self)
 378         for theme_name in self.actuator.theme_names():
 379             theme_action = themes_menu.addAction(theme_name)
 380             theme_action.setCheckable(True)
 381             if selected_theme == theme_name:
 382                 theme_action.setChecked(True)
 383             class SelectThemeFunctor:
 384                 def __init__(self, theme_name, toggle_theme):
 385                     self.theme_name = theme_name
 386                     self.toggle_theme = toggle_theme
 387                 def __call__(self, checked):
 388                     if checked:
 389                         self.toggle_theme(self.theme_name)
 390             delegate = SelectThemeFunctor(theme_name, self.toggle_theme)
 391             theme_action.toggled.connect(delegate)
 392             theme_group.addAction(theme_action)
 393         view_menu.addSeparator()
 394         show_history = view_menu.addAction(_("Show History"))
 395         show_history.setCheckable(True)
 396         show_history.toggled.connect(self.show_history)
 397
 398         help_menu = menubar.addMenu(_("&Help"))
 399         the_website = help_menu.addAction(_("&Website"))
 400         the_website.triggered.connect(self.the_website)
 401         help_menu.addSeparator()
 402         report_bug = help_menu.addAction(_("&Report Bug"))
 403         report_bug.triggered.connect(self.show_report_bug)
 404         show_about = help_menu.addAction(_("&About"))
 405         show_about.triggered.connect(self.show_about)
 406         main_layout.setMenuBar(menubar)
 407         self.main_layout = main_layout
 408
 409         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 410         quit_shortcut.activated.connect(self.close)
 411         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 412         close_shortcut.activated.connect(self.close)
 413
 414         g = self.config.get("winpos-lite",[4, 25, 351, 149])
 415         self.setGeometry(g[0], g[1], g[2], g[3])
 416
 417         show_hist = self.config.get("gui_show_history",False)
 418         show_history.setChecked(show_hist)
 419         self.show_history(show_hist)
 420
 421         self.setWindowIcon(QIcon(":electrum.png"))
 422         self.setWindowTitle("Electrum")
 423         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 424         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 425         self.setObjectName("main_window")
 426         self.show()
 427
 428     def toggle_receiving_layout(self):
 429         if self.receiving_box.isVisible():
 430             self.receiving_box.hide()
 431             self.receive_button.setProperty("isActive", False)
 432
 433             qApp.style().unpolish(self.receive_button)
 434             qApp.style().polish(self.receive_button)
 435         else:
 436             self.receiving_box.show()
 437             self.receive_button.setProperty("isActive", 'true')
 438
 439             qApp.style().unpolish(self.receive_button)
 440             qApp.style().polish(self.receive_button)
 441
 442     def toggle_theme(self, theme_name):
 443         old_path = QDir.currentPath()
 444         self.actuator.change_theme(theme_name)
 445         # Recompute style globally
 446         qApp.style().unpolish(self)
 447         qApp.style().polish(self)
 448         QDir.setCurrent(old_path)
 449
 450     def closeEvent(self, event):
 451         g = self.geometry()
 452         self.config.set_key("winpos-lite", [g.left(),g.top(),g.width(),g.height()],True)
 453         self.config.set_key("gui_show_history", self.history_list.isVisible(),True)
 454
 455         super(MiniWindow, self).closeEvent(event)
 456         qApp.quit()
 457
 458     def set_payment_fields(self, dest_address, amount):
 459         self.address_input.setText(dest_address)
 460         self.address_field_changed(dest_address)
 461         self.amount_input.setText(amount)
 462
 463     def activate(self):
 464         pass
 465
 466     def deactivate(self):
 467         pass
 468
 469     def set_quote_currency(self, currency):
 470         """Set and display the fiat currency country."""
 471         assert currency in self.quote_currencies
 472         self.quote_currencies.remove(currency)
 473         self.quote_currencies.insert(0, currency)
 474         self.refresh_balance()
 475
 476     def change_quote_currency(self):
 477         self.quote_currencies = \
 478             self.quote_currencies[1:] + self.quote_currencies[0:1]
 479         self.actuator.set_config_currency(self.quote_currencies[0])
 480         self.refresh_balance()
 481
 482     def refresh_balance(self):
 483         if self.btc_balance is None:
 484             # Price has been discovered before wallet has been loaded
 485             # and server connect... so bail.
 486             return
 487         self.set_balances(self.btc_balance)
 488         self.amount_input_changed(self.amount_input.text())
 489
 490     def set_balances(self, btc_balance):
 491         """Set the bitcoin balance and update the amount label accordingly."""
 492         self.btc_balance = btc_balance
 493         quote_text = self.create_quote_text(btc_balance)
 494         if quote_text:
 495             quote_text = "(%s)" % quote_text
 496         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 497         self.balance_label.set_balance_text(btc_balance, quote_text)
 498         self.setWindowTitle("Electrum %s - %s BTC" % (electrum_version, btc_balance))
 499
 500     def amount_input_changed(self, amount_text):
 501         """Update the number of bitcoins displayed."""
 502         self.check_button_status()
 503
 504         try:
 505             amount = D(str(amount_text))
 506         except decimal.InvalidOperation:
 507             self.balance_label.show_balance()
 508         else:
 509             quote_text = self.create_quote_text(amount * bitcoin(1))
 510             if quote_text:
 511                 self.balance_label.set_amount_text(quote_text)
 512                 self.balance_label.show_amount()
 513             else:
 514                 self.balance_label.show_balance()
 515
 516     def create_quote_text(self, btc_balance):
 517         """Return a string copy of the amount fiat currency the
 518         user has in bitcoins."""
 519         quote_currency = self.quote_currencies[0]
 520         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 521         if quote_balance is None:
 522             quote_text = ""
 523         else:
 524             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 525                                       quote_currency)
 526         return quote_text
 527
 528     def send(self):
 529         if self.actuator.send(self.address_input.text(),
 530                               self.amount_input.text(), self):
 531             self.address_input.setText("")
 532             self.amount_input.setText("")
 533
 534     def check_button_status(self):
 535         """Check that the bitcoin address is valid and that something
 536         is entered in the amount before making the send button clickable."""
 537         try:
 538             value = D(str(self.amount_input.text())) * 10**8
 539         except decimal.InvalidOperation:
 540             value = None
 541         # self.address_input.property(...) returns a qVariant, not a bool.
 542         # The == is needed to properly invoke a comparison.
 543         if (self.address_input.property("isValid") == True and
 544             value is not None and 0 < value <= self.btc_balance):
 545             self.send_button.setDisabled(False)
 546         else:
 547             self.send_button.setDisabled(True)
 548
 549     def address_field_changed(self, address):
 550         # label or alias, with address in brackets
 551         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 552                           address)
 553         if match2:
 554           address = match2.group(2)
 555           self.address_input.setText(address)
 556
 557         if self.actuator.is_valid(address):
 558             self.check_button_status()
 559             self.address_input.setProperty("isValid", True)
 560             self.recompute_style(self.address_input)
 561         else:
 562             self.send_button.setDisabled(True)
 563             self.address_input.setProperty("isValid", False)
 564             self.recompute_style(self.address_input)
 565
 566         if len(address) == 0:
 567             self.address_input.setProperty("isValid", None)
 568             self.recompute_style(self.address_input)
 569
 570     def recompute_style(self, element):
 571         self.style().unpolish(element)
 572         self.style().polish(element)
 573
 574     def copy_address(self):
 575         receive_popup = ReceivePopup(self.receive_button)
 576         self.actuator.copy_address(receive_popup)
 577
 578     def update_completions(self, completions):
 579         self.address_completions.setStringList(completions)
 580
 581
 582     def update_history(self, tx_history):
 583         from util import format_satoshis, age
 584
 585         self.history_list.empty()
 586
 587         for item in tx_history[-10:]:
 588             tx_hash, conf, is_mine, value, fee, balance, timestamp = item
 589             label = self.actuator.wallet.get_label(tx_hash)[0]
 590             #amount = D(value) / 10**8
 591             v_str = format_satoshis(value, True)
 592             self.history_list.append(label, v_str, age(timestamp))
 593
 594     def acceptbit(self):
 595         self.actuator.acceptbit(self.quote_currencies[0])
 596
 597     def the_website(self):
 598         webbrowser.open("http://electrum-desktop.com")
 599
 600     def show_about(self):
 601         QMessageBox.about(self, "Electrum",
 602             _("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."))
 603
 604     def show_report_bug(self):
 605         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 606             _("Please report any bugs as issues on github: <a href=\"https://github.com/spesmilo/electrum/issues\">https://github.com/spesmilo/electrum/issues</a>"))
 607
 608     def show_history(self, toggle_state):
 609         if toggle_state:
 610             self.main_layout.setRowMinimumHeight(3,200)
 611             self.history_list.show()
 612         else:
 613             self.main_layout.setRowMinimumHeight(3,0)
 614             self.history_list.hide()
 615
 616     def backup_wallet(self):
 617         try:
 618           folderName = QFileDialog.getExistingDirectory(QWidget(), 'Select folder to save a copy of your wallet to', os.path.expanduser('~/'))
 619           if folderName:
 620             sourceFile = util.user_dir() + '/electrum.dat'
 621             shutil.copy2(sourceFile, str(folderName))
 622             QMessageBox.information(None,"Wallet backup created", "A copy of your wallet file was created in '%s'" % str(folderName))
 623         except (IOError, os.error), reason:
 624           QMessageBox.critical(None,"Unable to create backup", "Electrum was unable copy your wallet file to the specified location.\n" + str(reason))
 625
 626
 627
 628
 629 class BalanceLabel(QLabel):
 630
 631     SHOW_CONNECTING = 1
 632     SHOW_BALANCE = 2
 633     SHOW_AMOUNT = 3
 634
 635     def __init__(self, change_quote_currency, parent=None):
 636         super(QLabel, self).__init__(_("Connecting..."), parent)
 637         self.change_quote_currency = change_quote_currency
 638         self.state = self.SHOW_CONNECTING
 639         self.balance_text = ""
 640         self.amount_text = ""
 641
 642     def mousePressEvent(self, event):
 643         """Change the fiat currency selection if window background is clicked."""
 644         if self.state != self.SHOW_CONNECTING:
 645             self.change_quote_currency()
 646
 647     def set_balance_text(self, btc_balance, quote_text):
 648         """Set the amount of bitcoins in the gui."""
 649         if self.state == self.SHOW_CONNECTING:
 650             self.state = self.SHOW_BALANCE
 651         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)
 652         if self.state == self.SHOW_BALANCE:
 653             self.setText(self.balance_text)
 654
 655     def set_amount_text(self, quote_text):
 656         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 657         if self.state == self.SHOW_AMOUNT:
 658             self.setText(self.amount_text)
 659
 660     def show_balance(self):
 661         if self.state == self.SHOW_AMOUNT:
 662             self.state = self.SHOW_BALANCE
 663             self.setText(self.balance_text)
 664
 665     def show_amount(self):
 666         if self.state == self.SHOW_BALANCE:
 667             self.state = self.SHOW_AMOUNT
 668             self.setText(self.amount_text)
 669
 670 def ok_cancel_buttons(dialog):
 671     row_layout = QHBoxLayout()
 672     row_layout.addStretch(1)
 673     ok_button = QPushButton(_("OK"))
 674     row_layout.addWidget(ok_button)
 675     ok_button.clicked.connect(dialog.accept)
 676     cancel_button = QPushButton(_("Cancel"))
 677     row_layout.addWidget(cancel_button)
 678     cancel_button.clicked.connect(dialog.reject)
 679     return row_layout
 680
 681 class PasswordDialog(QDialog):
 682
 683     def __init__(self, parent):
 684         super(QDialog, self).__init__(parent)
 685
 686         self.setModal(True)
 687
 688         self.password_input = QLineEdit()
 689         self.password_input.setEchoMode(QLineEdit.Password)
 690
 691         main_layout = QVBoxLayout(self)
 692         message = _('Please enter your password')
 693         main_layout.addWidget(QLabel(message))
 694
 695         grid = QGridLayout()
 696         grid.setSpacing(8)
 697         grid.addWidget(QLabel(_('Password')), 1, 0)
 698         grid.addWidget(self.password_input, 1, 1)
 699         main_layout.addLayout(grid)
 700
 701         main_layout.addLayout(ok_cancel_buttons(self))
 702         self.setLayout(main_layout)
 703
 704     def run(self):
 705         if not self.exec_():
 706             return
 707         return unicode(self.password_input.text())
 708
 709 class ReceivePopup(QDialog):
 710
 711     def leaveEvent(self, event):
 712         self.close()
 713
 714     def setup(self, address):
 715         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 716         address_display = QLineEdit(address)
 717         address_display.setReadOnly(True)
 718         resize_line_edit_width(address_display, address)
 719
 720         main_layout = QVBoxLayout(self)
 721         main_layout.addWidget(label)
 722         main_layout.addWidget(address_display)
 723
 724         self.setMouseTracking(True)
 725         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 726         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|
 727                             Qt.MSWindowsFixedSizeDialogHint)
 728         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 729         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 730         #self.setAlignment(Qt.AlignCenter)
 731
 732     def popup(self):
 733         parent = self.parent()
 734         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 735         self.move(top_left_pos)
 736         center_mouse_pos = self.mapToGlobal(self.rect().center())
 737         QCursor.setPos(center_mouse_pos)
 738         self.show()
 739
 740 class MiniActuator:
 741     """Initialize the definitions relating to themes and
 742     sending/recieving bitcoins."""
 743
 744
 745     def __init__(self, wallet):
 746         """Retrieve the gui theme used in previous session."""
 747         self.wallet = wallet
 748         self.theme_name = self.wallet.config.get('litegui_theme','Cleanlook')
 749         self.themes = load_theme_paths()
 750
 751     def load_theme(self):
 752         """Load theme retrieved from wallet file."""
 753         try:
 754             theme_prefix, theme_path = self.themes[self.theme_name]
 755         except KeyError:
 756             util.print_error("Theme not found!", self.theme_name)
 757             return
 758         QDir.setCurrent(os.path.join(theme_prefix, theme_path))
 759         with open(rsrc("style.css")) as style_file:
 760             qApp.setStyleSheet(style_file.read())
 761
 762     def theme_names(self):
 763         """Sort themes."""
 764         return sorted(self.themes.keys())
 765
 766     def selected_theme(self):
 767         """Select theme."""
 768         return self.theme_name
 769
 770     def change_theme(self, theme_name):
 771         """Change theme."""
 772         self.theme_name = theme_name
 773         self.wallet.config.set_key('litegui_theme',theme_name)
 774         self.load_theme()
 775
 776     def set_configured_currency(self, set_quote_currency):
 777         """Set the inital fiat currency conversion country (USD/EUR/GBP) in
 778         the GUI to what it was set to in the wallet."""
 779         currency = self.wallet.config.get('conversion_currency')
 780         # currency can be none when Electrum is used for the first
 781         # time and no setting has been created yet.
 782         if currency is not None:
 783             set_quote_currency(currency)
 784
 785     def set_config_currency(self, conversion_currency):
 786         """Change the wallet fiat currency country."""
 787         self.wallet.config.set_key('conversion_currency',conversion_currency,True)
 788
 789     def copy_address(self, receive_popup):
 790         """Copy the wallet addresses into the client."""
 791         addrs = [addr for addr in self.wallet.all_addresses()
 792                  if not self.wallet.is_change(addr)]
 793         # Select most recent addresses from gap limit
 794         addrs = addrs[-self.wallet.gap_limit:]
 795         copied_address = random.choice(addrs)
 796         qApp.clipboard().setText(copied_address)
 797         receive_popup.setup(copied_address)
 798         receive_popup.popup()
 799
 800     def waiting_dialog(self, f):
 801         s = Timer()
 802         s.start()
 803         w = QDialog()
 804         w.resize(200, 70)
 805         w.setWindowTitle('Electrum')
 806         l = QLabel('Sending transaction, please wait.')
 807         vbox = QVBoxLayout()
 808         vbox.addWidget(l)
 809         w.setLayout(vbox)
 810         w.show()
 811         def ff():
 812             s = f()
 813             if s: l.setText(s)
 814             else: w.close()
 815         w.connect(s, QtCore.SIGNAL('timersignal'), ff)
 816         w.exec_()
 817         w.destroy()
 818
 819
 820     def send(self, address, amount, parent_window):
 821         """Send bitcoins to the target address."""
 822         dest_address = self.fetch_destination(address)
 823
 824         if dest_address is None or not self.wallet.is_valid(dest_address):
 825             QMessageBox.warning(parent_window, _('Error'),
 826                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 827             return False
 828
 829         convert_amount = lambda amount: \
 830             int(D(unicode(amount)) * bitcoin(1))
 831         amount = convert_amount(amount)
 832
 833         if self.wallet.use_encryption:
 834             password_dialog = PasswordDialog(parent_window)
 835             password = password_dialog.run()
 836             if not password:
 837                 return
 838         else:
 839             password = None
 840
 841         fee = 0
 842         # 0.1 BTC = 10000000
 843         if amount < bitcoin(1) / 10:
 844             # 0.001 BTC
 845             fee = bitcoin(1) / 1000
 846
 847         try:
 848             tx = self.wallet.mktx([(dest_address, amount)], "", password, fee)
 849         except BaseException as error:
 850             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 851             return False
 852
 853         h = self.wallet.send_tx(tx)
 854
 855         self.waiting_dialog(lambda: False if self.wallet.tx_event.isSet() else _("Sending transaction, please wait..."))
 856
 857         status, message = self.wallet.receive_tx(h)
 858
 859         if not status:
 860             import tempfile
 861             dumpf = tempfile.NamedTemporaryFile(delete=False)
 862             dumpf.write(tx)
 863             dumpf.close()
 864             print "Dumped error tx to", dumpf.name
 865             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 866             return False
 867
 868         TransactionWindow(message, self)
 869 #        QMessageBox.information(parent_window, '',
 870 #            _('Your transaction has been sent.') + '\n' + message, _('OK'))
 871         return True
 872
 873     def fetch_destination(self, address):
 874         recipient = unicode(address).strip()
 875
 876         # alias
 877         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 878                           recipient)
 879
 880         # label or alias, with address in brackets
 881         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 882                           recipient)
 883
 884         if match1:
 885             dest_address = \
 886                 self.wallet.get_alias(recipient, True,
 887                                       self.show_message, self.question)
 888             return dest_address
 889         elif match2:
 890             return match2.group(2)
 891         else:
 892             return recipient
 893
 894     def is_valid(self, address):
 895         """Check if bitcoin address is valid."""
 896
 897         return self.wallet.is_valid(address)
 898
 899     def copy_master_public_key(self):
 900         master_pubkey = self.wallet.master_public_key
 901         qApp.clipboard().setText(master_pubkey)
 902         QMessageBox.information(None,"Copy succesful", "Your public master key has been copied to your clipboard.")
 903
 904
 905     def acceptbit(self, currency):
 906         master_pubkey = self.wallet.master_public_key
 907         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 908         webbrowser.open(url)
 909
 910     def show_seed_dialog(self):
 911         gui_qt.ElectrumWindow.show_seed_dialog(self.wallet)
 912
 913 class MiniDriver(QObject):
 914
 915     INITIALIZING = 0
 916     CONNECTING = 1
 917     SYNCHRONIZING = 2
 918     READY = 3
 919
 920     def __init__(self, wallet, window):
 921         super(QObject, self).__init__()
 922
 923         self.wallet = wallet
 924         self.window = window
 925
 926         self.wallet.interface.register_callback('updated',self.update_callback)
 927         self.wallet.interface.register_callback('connected', self.update_callback)
 928         self.wallet.interface.register_callback('disconnected', self.update_callback)
 929
 930         self.state = None
 931
 932         self.initializing()
 933         self.connect(self, SIGNAL("updatesignal()"), self.update)
 934         self.update_callback()
 935
 936     # This is a hack to workaround that Qt does not like changing the
 937     # window properties from this other thread before the runloop has
 938     # been called from.
 939     def update_callback(self):
 940         self.emit(SIGNAL("updatesignal()"))
 941
 942     def update(self):
 943         if not self.wallet.interface:
 944             self.initializing()
 945         elif not self.wallet.interface.is_connected:
 946             self.connecting()
 947         elif not self.wallet.up_to_date:
 948             self.synchronizing()
 949         else:
 950             self.ready()
 951
 952         if self.wallet.up_to_date:
 953             self.update_balance()
 954             self.update_completions()
 955             self.update_history()
 956
 957     def initializing(self):
 958         if self.state == self.INITIALIZING:
 959             return
 960         self.state = self.INITIALIZING
 961         self.window.deactivate()
 962
 963     def connecting(self):
 964         if self.state == self.CONNECTING:
 965             return
 966         self.state = self.CONNECTING
 967         self.window.deactivate()
 968
 969     def synchronizing(self):
 970         if self.state == self.SYNCHRONIZING:
 971             return
 972         self.state = self.SYNCHRONIZING
 973         self.window.deactivate()
 974
 975     def ready(self):
 976         if self.state == self.READY:
 977             return
 978         self.state = self.READY
 979         self.window.activate()
 980
 981     def update_balance(self):
 982         conf_balance, unconf_balance = self.wallet.get_balance()
 983         balance = D(conf_balance + unconf_balance)
 984         self.window.set_balances(balance)
 985
 986     def update_completions(self):
 987         completions = []
 988         for addr, label in self.wallet.labels.items():
 989             if addr in self.wallet.addressbook:
 990                 completions.append("%s <%s>" % (label, addr))
 991         completions = completions + self.wallet.aliases.keys()
 992         self.window.update_completions(completions)
 993
 994     def update_history(self):
 995         tx_history = self.wallet.get_tx_history()
 996         self.window.update_history(tx_history)
 997
 998
 999 if __name__ == "__main__":
1000     app = QApplication(sys.argv)
1001     with open(rsrc("style.css")) as style_file:
1002         app.setStyleSheet(style_file.read())
1003     mini = MiniWindow()
1004     sys.exit(app.exec_())
1005