lib/gui_lite.py

   1 from PyQt4.QtCore import *
   2 from PyQt4.QtGui import *
   3 from decimal import Decimal as D
   4 from util import appdata_dir, get_resource_path as rsrc
   5 from i18n import _
   6 import decimal
   7 import exchange_rate
   8 import os.path
   9 import random
  10 import re
  11 import sys
  12 import time
  13 import wallet
  14 import webbrowser
  15 import history_widget
  16
  17 try:
  18     import lib.gui_qt as gui_qt
  19 except ImportError:
  20     import electrum.gui_qt as gui_qt
  21
  22 bitcoin = lambda v: v * 100000000
  23
  24 def IconButton(filename, parent=None):
  25     pixmap = QPixmap(filename)
  26     icon = QIcon(pixmap)
  27     return QPushButton(icon, "", parent)
  28
  29 class Timer(QThread):
  30     def run(self):
  31         while True:
  32             self.emit(SIGNAL('timersignal'))
  33             time.sleep(0.5)
  34
  35 def resize_line_edit_width(line_edit, text_input):
  36     metrics = QFontMetrics(qApp.font())
  37     # Create an extra character to add some space on the end
  38     text_input += "A"
  39     line_edit.setMinimumWidth(metrics.width(text_input))
  40
  41 def cd_data_dir():
  42     assert sys.argv
  43     prefix_path = os.path.dirname(sys.argv[0])
  44     local_data = os.path.join(prefix_path, "data")
  45     if os.path.exists(os.path.join(local_data, "style.css")):
  46         data_dir = local_data
  47     else:
  48         data_dir = appdata_dir()
  49     QDir.setCurrent(data_dir)
  50
  51 class ElectrumGui:
  52
  53     def __init__(self, wallet):
  54         self.wallet = wallet
  55         self.app = QApplication(sys.argv)
  56         # Should probably not modify the current path but instead
  57         # change the behaviour of rsrc(...)
  58         self.old_path = QDir.currentPath()
  59         cd_data_dir()
  60         with open(rsrc("style.css")) as style_file:
  61             self.app.setStyleSheet(style_file.read())
  62
  63     def main(self, url):
  64         actuator = MiniActuator(self.wallet)
  65         self.mini = MiniWindow(actuator, self.expand)
  66         driver = MiniDriver(self.wallet, self.mini)
  67
  68         # Reset path back to original value now that loading the GUI
  69         # is completed.
  70         QDir.setCurrent(self.old_path)
  71
  72         if url:
  73             self.set_url(url)
  74
  75         timer = Timer()
  76         timer.start()
  77         self.expert = gui_qt.ElectrumWindow(self.wallet)
  78         self.expert.app = self.app
  79         self.expert.connect_slots(timer)
  80         self.expert.update_wallet()
  81
  82         self.app.exec_()
  83
  84     def expand(self):
  85         self.mini.hide()
  86         self.expert.show()
  87
  88     def set_url(self, url):
  89         payto, amount, label, message, signature, identity, url = \
  90             self.wallet.parse_url(url, self.show_message, self.show_question)
  91         self.mini.set_payment_fields(payto, amount)
  92
  93     def show_message(self, message):
  94         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
  95
  96     def show_question(self, message):
  97         choice = QMessageBox.question(self.mini, _("Message"), message,
  98                                       QMessageBox.Yes|QMessageBox.No,
  99                                       QMessageBox.No)
 100         return choice == QMessageBox.Yes
 101
 102     def restore_or_create(self):
 103         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
 104         return qt_gui_object.restore_or_create()
 105
 106 class MiniWindow(QDialog):
 107
 108     def __init__(self, actuator, expand_callback):
 109         super(MiniWindow, self).__init__()
 110
 111         self.actuator = actuator
 112
 113         self.btc_balance = None
 114         self.quote_currencies = ["EUR", "USD", "GBP"]
 115         self.actuator.set_configured_currency(self.set_quote_currency)
 116         self.exchanger = exchange_rate.Exchanger(self)
 117         # Needed because price discovery is done in a different thread
 118         # which needs to be sent back to this main one to update the GUI
 119         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 120
 121         self.balance_label = BalanceLabel(self.change_quote_currency)
 122         self.balance_label.setObjectName("balance_label")
 123
 124         self.receive_button = QPushButton(_("&Receive"))
 125         self.receive_button.setObjectName("receive_button")
 126         self.receive_button.setDefault(True)
 127         self.connect(self.receive_button, SIGNAL("clicked()"), self.copy_address)
 128
 129         # Bitcoin address code
 130         self.address_input = QLineEdit()
 131         self.address_input.setPlaceholderText(_("Enter a Bitcoin address..."))
 132         self.address_input.setObjectName("address_input")
 133
 134
 135         self.connect(self.address_input, SIGNAL("textEdited(QString)"), self.address_field_changed)
 136         resize_line_edit_width(self.address_input, "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 137
 138         self.address_completions = QStringListModel()
 139         address_completer = QCompleter(self.address_input)
 140         address_completer.setCaseSensitivity(False)
 141         address_completer.setModel(self.address_completions)
 142         self.address_input.setCompleter(address_completer)
 143
 144         address_layout = QHBoxLayout()
 145         address_layout.addWidget(self.address_input)
 146
 147         self.amount_input = QLineEdit()
 148         self.amount_input.setPlaceholderText(_("... and amount"))
 149         self.amount_input.setObjectName("amount_input")
 150         # This is changed according to the user's displayed balance
 151         self.amount_validator = QDoubleValidator(self.amount_input)
 152         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 153         self.amount_validator.setDecimals(8)
 154         self.amount_input.setValidator(self.amount_validator)
 155
 156         # This removes the very ugly OSX highlighting, please leave this in :D
 157         self.address_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 158         self.amount_input.setAttribute(Qt.WA_MacShowFocusRect, 0)
 159
 160         self.connect(self.amount_input, SIGNAL("textChanged(QString)"),
 161                      self.amount_input_changed)
 162
 163         self.send_button = QPushButton(_("&Send"))
 164         self.send_button.setObjectName("send_button")
 165         self.send_button.setDisabled(True);
 166         self.connect(self.send_button, SIGNAL("clicked()"), self.send)
 167
 168         main_layout = QGridLayout(self)
 169
 170         main_layout.addWidget(self.balance_label, 0, 0)
 171         main_layout.addWidget(self.receive_button, 0, 1)
 172
 173         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 174
 175         main_layout.addWidget(self.amount_input, 2, 0)
 176         main_layout.addWidget(self.send_button, 2, 1)
 177
 178         self.history_list = history_widget.HistoryWidget()
 179         self.history_list.hide()
 180         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 181
 182         menubar = QMenuBar()
 183         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 184         electrum_menu.addMenu(_("&Servers"))
 185         electrum_menu.addSeparator()
 186         electrum_menu.addAction(_("&Quit"))
 187
 188         view_menu = menubar.addMenu(_("&View"))
 189         expert_gui = view_menu.addAction(_("&Pro Mode"))
 190         self.connect(expert_gui, SIGNAL("triggered()"), expand_callback)
 191         view_menu.addMenu(_("&Themes"))
 192         view_menu.addSeparator()
 193         show_history = view_menu.addAction(_("Show History"))
 194         show_history.setCheckable(True)
 195         self.connect(show_history, SIGNAL("toggled(bool)"), self.show_history)
 196
 197         settings_menu = menubar.addMenu(_("&Settings"))
 198         settings_menu.addAction(_("&Configure Electrum"))
 199
 200         help_menu = menubar.addMenu(_("&Help"))
 201         help_menu.addAction(_("&Contents"))
 202         help_menu.addSeparator()
 203         help_menu.addAction(_("&Report Bug"))
 204         help_menu.addAction(_("&About"))
 205         main_layout.setMenuBar(menubar)
 206
 207         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 208         self.connect(quit_shortcut, SIGNAL("activated()"), self.close)
 209         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 210         self.connect(close_shortcut, SIGNAL("activated()"), self.close)
 211
 212         self.setWindowIcon(QIcon(":electrum.png"))
 213         self.setWindowTitle("Electrum")
 214         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 215         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 216         self.setObjectName("main_window")
 217         self.show()
 218
 219     def recompute_style(self):
 220         qApp.style().unpolish(self)
 221         qApp.style().polish(self)
 222
 223     def closeEvent(self, event):
 224         super(MiniWindow, self).closeEvent(event)
 225         qApp.quit()
 226
 227     def set_payment_fields(self, dest_address, amount):
 228         self.address_input.setText(dest_address)
 229         self.address_field_changed(dest_address)
 230         self.amount_input.setText(amount)
 231
 232     def activate(self):
 233         pass
 234
 235     def deactivate(self):
 236         pass
 237
 238     def set_quote_currency(self, currency):
 239         assert currency in self.quote_currencies
 240         self.quote_currencies.remove(currency)
 241         self.quote_currencies = [currency] + self.quote_currencies
 242         self.refresh_balance()
 243
 244     def change_quote_currency(self):
 245         self.quote_currencies = \
 246             self.quote_currencies[1:] + self.quote_currencies[0:1]
 247         self.actuator.set_config_currency(self.quote_currencies[0])
 248         self.refresh_balance()
 249
 250     def refresh_balance(self):
 251         if self.btc_balance is None:
 252             # Price has been discovered before wallet has been loaded
 253             # and server connect... so bail.
 254             return
 255         self.set_balances(self.btc_balance)
 256         self.amount_input_changed(self.amount_input.text())
 257
 258     def set_balances(self, btc_balance):
 259         self.btc_balance = btc_balance
 260         quote_text = self.create_quote_text(btc_balance)
 261         if quote_text:
 262             quote_text = "(%s)" % quote_text
 263         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 264         self.balance_label.set_balance_text(btc_balance, quote_text)
 265         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 266
 267     def amount_input_changed(self, amount_text):
 268         self.check_button_status()
 269
 270         try:
 271             amount = D(str(amount_text))
 272         except decimal.InvalidOperation:
 273             self.balance_label.show_balance()
 274         else:
 275             quote_text = self.create_quote_text(amount * bitcoin(1))
 276             if quote_text:
 277                 self.balance_label.set_amount_text(quote_text)
 278                 self.balance_label.show_amount()
 279             else:
 280                 self.balance_label.show_balance()
 281
 282     def create_quote_text(self, btc_balance):
 283         quote_currency = self.quote_currencies[0]
 284         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 285         if quote_balance is None:
 286             quote_text = ""
 287         else:
 288             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 289                                       quote_currency)
 290         return quote_text
 291
 292     def send(self):
 293         if self.actuator.send(self.address_input.text(),
 294                               self.amount_input.text(), self):
 295             self.address_input.setText("")
 296             self.amount_input.setText("")
 297
 298     def check_button_status(self):
 299       if (self.address_input.property("isValid") is True and
 300           len(self.amount_input.text()) > 0):
 301         self.send_button.setDisabled(False)
 302       else:
 303         self.send_button.setDisabled(True)
 304
 305     def address_field_changed(self, address):
 306         if self.actuator.is_valid(address):
 307             self.check_button_status()
 308             self.address_input.setProperty("isValid", True)
 309             self.recompute_style(self.address_input)
 310         else:
 311             self.send_button.setDisabled(True)
 312             self.address_input.setProperty("isValid", False)
 313             self.recompute_style(self.address_input)
 314
 315         if len(address) == 0:
 316             self.address_input.setProperty("isValid", None)
 317             self.recompute_style(self.address_input)
 318
 319     def recompute_style(self, element):
 320         self.style().unpolish(element)
 321         self.style().polish(element)
 322
 323     def copy_address(self):
 324         receive_popup = ReceivePopup(self.receive_button)
 325         self.actuator.copy_address(receive_popup)
 326
 327     def update_completions(self, completions):
 328         self.address_completions.setStringList(completions)
 329
 330     def update_history(self, tx_history):
 331         for tx in tx_history[-10:]:
 332             address = tx["dest_address"]
 333             amount = D(tx["value"]) / 10**8
 334             self.history_list.append(address, amount)
 335
 336     def acceptbit(self):
 337         self.actuator.acceptbit(self.quote_currencies[0])
 338
 339     def show_about(self):
 340         QMessageBox.about(self, "Electrum",
 341             _("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."))
 342
 343     def show_report_bug(self):
 344         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 345             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 346
 347     def show_history(self, toggle_state):
 348         if toggle_state:
 349             self.history_list.show()
 350         else:
 351             self.history_list.hide()
 352
 353 class BalanceLabel(QLabel):
 354
 355     SHOW_CONNECTING = 1
 356     SHOW_BALANCE = 2
 357     SHOW_AMOUNT = 3
 358
 359     def __init__(self, change_quote_currency, parent=None):
 360         super(QLabel, self).__init__(_("Connecting..."), parent)
 361         self.change_quote_currency = change_quote_currency
 362         self.state = self.SHOW_CONNECTING
 363         self.balance_text = ""
 364         self.amount_text = ""
 365
 366     def mousePressEvent(self, event):
 367         if self.state != self.SHOW_CONNECTING:
 368             self.change_quote_currency()
 369
 370     def set_balance_text(self, btc_balance, quote_text):
 371         if self.state == self.SHOW_CONNECTING:
 372             self.state = self.SHOW_BALANCE
 373         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)
 374         if self.state == self.SHOW_BALANCE:
 375             self.setText(self.balance_text)
 376
 377     def set_amount_text(self, quote_text):
 378         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 379         if self.state == self.SHOW_AMOUNT:
 380             self.setText(self.amount_text)
 381
 382     def show_balance(self):
 383         if self.state == self.SHOW_AMOUNT:
 384             self.state = self.SHOW_BALANCE
 385             self.setText(self.balance_text)
 386
 387     def show_amount(self):
 388         if self.state == self.SHOW_BALANCE:
 389             self.state = self.SHOW_AMOUNT
 390             self.setText(self.amount_text)
 391
 392 def ok_cancel_buttons(dialog):
 393     row_layout = QHBoxLayout()
 394     row_layout.addStretch(1)
 395     ok_button = QPushButton(_("OK"))
 396     row_layout.addWidget(ok_button)
 397     ok_button.clicked.connect(dialog.accept)
 398     cancel_button = QPushButton(_("Cancel"))
 399     row_layout.addWidget(cancel_button)
 400     cancel_button.clicked.connect(dialog.reject)
 401     return row_layout
 402
 403 class PasswordDialog(QDialog):
 404
 405     def __init__(self, parent):
 406         super(QDialog, self).__init__(parent)
 407
 408         self.setModal(True)
 409
 410         self.password_input = QLineEdit()
 411         self.password_input.setEchoMode(QLineEdit.Password)
 412
 413         main_layout = QVBoxLayout(self)
 414         message = _('Please enter your password')
 415         main_layout.addWidget(QLabel(message))
 416
 417         grid = QGridLayout()
 418         grid.setSpacing(8)
 419         grid.addWidget(QLabel(_('Password')), 1, 0)
 420         grid.addWidget(self.password_input, 1, 1)
 421         main_layout.addLayout(grid)
 422
 423         main_layout.addLayout(ok_cancel_buttons(self))
 424         self.setLayout(main_layout)
 425
 426     def run(self):
 427         if not self.exec_():
 428             return
 429         return unicode(self.password_input.text())
 430
 431 class ReceivePopup(QDialog):
 432
 433     def leaveEvent(self, event):
 434         self.close()
 435
 436     def setup(self, address):
 437         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 438         address_display = QLineEdit(address)
 439         address_display.setReadOnly(True)
 440         resize_line_edit_width(address_display, address)
 441
 442         main_layout = QVBoxLayout(self)
 443         main_layout.addWidget(label)
 444         main_layout.addWidget(address_display)
 445
 446         self.setMouseTracking(True)
 447         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 448         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|Qt.MSWindowsFixedSizeDialogHint)
 449         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 450         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 451         #self.setAlignment(Qt.AlignCenter)
 452
 453     def popup(self):
 454         parent = self.parent()
 455         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 456         self.move(top_left_pos)
 457         center_mouse_pos = self.mapToGlobal(self.rect().center())
 458         QCursor.setPos(center_mouse_pos)
 459         self.show()
 460
 461 class MiniActuator:
 462
 463     def __init__(self, wallet):
 464         self.wallet = wallet
 465
 466     def set_configured_currency(self, set_quote_currency):
 467         currency = self.wallet.conversion_currency
 468         # currency can be none when Electrum is used for the first
 469         # time and no setting has been created yet.
 470         if currency is not None:
 471             set_quote_currency(currency)
 472
 473     def set_config_currency(self, conversion_currency):
 474         self.wallet.conversion_currency = conversion_currency
 475
 476     def copy_address(self, receive_popup):
 477         addrs = [addr for addr in self.wallet.all_addresses()
 478                  if not self.wallet.is_change(addr)]
 479         # Select most recent addresses from gap limit
 480         addrs = addrs[-self.wallet.gap_limit:]
 481         copied_address = random.choice(addrs)
 482         qApp.clipboard().setText(copied_address)
 483         receive_popup.setup(copied_address)
 484         receive_popup.popup()
 485
 486     def send(self, address, amount, parent_window):
 487         dest_address = self.fetch_destination(address)
 488
 489         if dest_address is None or not self.wallet.is_valid(dest_address):
 490             QMessageBox.warning(parent_window, _('Error'),
 491                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 492             return False
 493
 494         convert_amount = lambda amount: \
 495             int(D(unicode(amount)) * bitcoin(1))
 496         amount = convert_amount(amount)
 497
 498         if self.wallet.use_encryption:
 499             password_dialog = PasswordDialog(parent_window)
 500             password = password_dialog.run()
 501             if not password:
 502                 return
 503         else:
 504             password = None
 505
 506         fee = 0
 507         # 0.1 BTC = 10000000
 508         if amount < bitcoin(1) / 10:
 509             # 0.001 BTC
 510             fee = bitcoin(1) / 1000
 511
 512         try:
 513             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 514         except BaseException as error:
 515             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 516             return False
 517
 518         status, message = self.wallet.sendtx(tx)
 519         if not status:
 520             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 521             return False
 522
 523         QMessageBox.information(parent_window, '',
 524             _('Payment sent.') + '\n' + message, _('OK'))
 525         return True
 526
 527     def fetch_destination(self, address):
 528         recipient = unicode(address).strip()
 529
 530         # alias
 531         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 532                           recipient)
 533
 534         # label or alias, with address in brackets
 535         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 536                           recipient)
 537
 538         if match1:
 539             dest_address = \
 540                 self.wallet.get_alias(recipient, True,
 541                                       self.show_message, self.question)
 542             return dest_address
 543         elif match2:
 544             return match2.group(2)
 545         else:
 546             return recipient
 547
 548     def is_valid(self, address):
 549         return self.wallet.is_valid(address)
 550
 551     def acceptbit(self, currency):
 552         master_pubkey = self.wallet.master_public_key.encode("hex")
 553         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 554         webbrowser.open(url)
 555
 556 class MiniDriver(QObject):
 557
 558     INITIALIZING = 0
 559     CONNECTING = 1
 560     SYNCHRONIZING = 2
 561     READY = 3
 562
 563     def __init__(self, wallet, window):
 564         super(QObject, self).__init__()
 565
 566         self.wallet = wallet
 567         self.window = window
 568
 569         self.wallet.register_callback(self.update_callback)
 570
 571         self.state = None
 572
 573         self.initializing()
 574         self.connect(self, SIGNAL("updatesignal()"), self.update)
 575         self.update_callback()
 576
 577     # This is a hack to workaround that Qt does not like changing the
 578     # window properties from this other thread before the runloop has
 579     # been called from.
 580     def update_callback(self):
 581         self.emit(SIGNAL("updatesignal()"))
 582
 583     def update(self):
 584         if not self.wallet.interface:
 585             self.initializing()
 586         elif not self.wallet.interface.is_connected:
 587             self.connecting()
 588         elif not self.wallet.blocks == -1:
 589             self.connecting()
 590         elif not self.wallet.is_up_to_date:
 591             self.synchronizing()
 592         else:
 593             self.ready()
 594
 595         if self.wallet.up_to_date:
 596             self.update_balance()
 597             self.update_completions()
 598             self.update_history()
 599
 600     def initializing(self):
 601         if self.state == self.INITIALIZING:
 602             return
 603         self.state = self.INITIALIZING
 604         self.window.deactivate()
 605
 606     def connecting(self):
 607         if self.state == self.CONNECTING:
 608             return
 609         self.state = self.CONNECTING
 610         self.window.deactivate()
 611
 612     def synchronizing(self):
 613         if self.state == self.SYNCHRONIZING:
 614             return
 615         self.state = self.SYNCHRONIZING
 616         self.window.deactivate()
 617
 618     def ready(self):
 619         if self.state == self.READY:
 620             return
 621         self.state = self.READY
 622         self.window.activate()
 623
 624     def update_balance(self):
 625         conf_balance, unconf_balance = self.wallet.get_balance()
 626         balance = D(conf_balance + unconf_balance)
 627         self.window.set_balances(balance)
 628
 629     def update_completions(self):
 630         completions = []
 631         for addr, label in self.wallet.labels.items():
 632             if addr in self.wallet.addressbook:
 633                 completions.append("%s <%s>" % (label, addr))
 634         completions = completions + self.wallet.aliases.keys()
 635         self.window.update_completions(completions)
 636
 637     def update_history(self):
 638         tx_history = self.wallet.get_tx_history()
 639         self.window.update_history(tx_history)
 640
 641 if __name__ == "__main__":
 642     app = QApplication(sys.argv)
 643     with open(rsrc("style.css")) as style_file:
 644         app.setStyleSheet(style_file.read())
 645     mini = MiniWindow()
 646     sys.exit(app.exec_())
 647