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.setObjectName("history")
 180         self.history_list.hide()
 181         self.history_list.setAlternatingRowColors(True)
 182         main_layout.addWidget(self.history_list, 3, 0, 1, -1)
 183
 184         menubar = QMenuBar()
 185         electrum_menu = menubar.addMenu(_("&Bitcoin"))
 186         electrum_menu.addMenu(_("&Servers"))
 187         electrum_menu.addSeparator()
 188         electrum_menu.addAction(_("&Quit"))
 189
 190         view_menu = menubar.addMenu(_("&View"))
 191         expert_gui = view_menu.addAction(_("&Pro Mode"))
 192         self.connect(expert_gui, SIGNAL("triggered()"), expand_callback)
 193         view_menu.addMenu(_("&Themes"))
 194         view_menu.addSeparator()
 195         show_history = view_menu.addAction(_("Show History"))
 196         show_history.setCheckable(True)
 197         self.connect(show_history, SIGNAL("toggled(bool)"), self.show_history)
 198
 199         settings_menu = menubar.addMenu(_("&Settings"))
 200         settings_menu.addAction(_("&Configure Electrum"))
 201
 202         help_menu = menubar.addMenu(_("&Help"))
 203         help_menu.addAction(_("&Contents"))
 204         help_menu.addSeparator()
 205         report_bug = help_menu.addAction(_("&Report Bug"))
 206         self.connect(report_bug, SIGNAL("triggered()"), self.show_report_bug)
 207         show_about = help_menu.addAction(_("&About"))
 208         self.connect(show_about, SIGNAL("triggered()"), self.show_about)
 209         main_layout.setMenuBar(menubar)
 210
 211         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 212         self.connect(quit_shortcut, SIGNAL("activated()"), self.close)
 213         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 214         self.connect(close_shortcut, SIGNAL("activated()"), self.close)
 215
 216         self.setWindowIcon(QIcon(":electrum.png"))
 217         self.setWindowTitle("Electrum")
 218         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 219         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 220         self.setObjectName("main_window")
 221         self.show()
 222
 223     def recompute_style(self):
 224         qApp.style().unpolish(self)
 225         qApp.style().polish(self)
 226
 227     def closeEvent(self, event):
 228         super(MiniWindow, self).closeEvent(event)
 229         qApp.quit()
 230
 231     def set_payment_fields(self, dest_address, amount):
 232         self.address_input.setText(dest_address)
 233         self.address_field_changed(dest_address)
 234         self.amount_input.setText(amount)
 235
 236     def activate(self):
 237         pass
 238
 239     def deactivate(self):
 240         pass
 241
 242     def set_quote_currency(self, currency):
 243         assert currency in self.quote_currencies
 244         self.quote_currencies.remove(currency)
 245         self.quote_currencies = [currency] + self.quote_currencies
 246         self.refresh_balance()
 247
 248     def change_quote_currency(self):
 249         self.quote_currencies = \
 250             self.quote_currencies[1:] + self.quote_currencies[0:1]
 251         self.actuator.set_config_currency(self.quote_currencies[0])
 252         self.refresh_balance()
 253
 254     def refresh_balance(self):
 255         if self.btc_balance is None:
 256             # Price has been discovered before wallet has been loaded
 257             # and server connect... so bail.
 258             return
 259         self.set_balances(self.btc_balance)
 260         self.amount_input_changed(self.amount_input.text())
 261
 262     def set_balances(self, btc_balance):
 263         self.btc_balance = btc_balance
 264         quote_text = self.create_quote_text(btc_balance)
 265         if quote_text:
 266             quote_text = "(%s)" % quote_text
 267         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 268         self.balance_label.set_balance_text(btc_balance, quote_text)
 269         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 270
 271     def amount_input_changed(self, amount_text):
 272         self.check_button_status()
 273
 274         try:
 275             amount = D(str(amount_text))
 276         except decimal.InvalidOperation:
 277             self.balance_label.show_balance()
 278         else:
 279             quote_text = self.create_quote_text(amount * bitcoin(1))
 280             if quote_text:
 281                 self.balance_label.set_amount_text(quote_text)
 282                 self.balance_label.show_amount()
 283             else:
 284                 self.balance_label.show_balance()
 285
 286     def create_quote_text(self, btc_balance):
 287         quote_currency = self.quote_currencies[0]
 288         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 289         if quote_balance is None:
 290             quote_text = ""
 291         else:
 292             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 293                                       quote_currency)
 294         return quote_text
 295
 296     def send(self):
 297         if self.actuator.send(self.address_input.text(),
 298                               self.amount_input.text(), self):
 299             self.address_input.setText("")
 300             self.amount_input.setText("")
 301
 302     def check_button_status(self):
 303       if (self.address_input.property("isValid") is True and
 304           len(self.amount_input.text()) > 0):
 305         self.send_button.setDisabled(False)
 306       else:
 307         self.send_button.setDisabled(True)
 308
 309     def address_field_changed(self, address):
 310         if self.actuator.is_valid(address):
 311             self.check_button_status()
 312             self.address_input.setProperty("isValid", True)
 313             self.recompute_style(self.address_input)
 314         else:
 315             self.send_button.setDisabled(True)
 316             self.address_input.setProperty("isValid", False)
 317             self.recompute_style(self.address_input)
 318
 319         if len(address) == 0:
 320             self.address_input.setProperty("isValid", None)
 321             self.recompute_style(self.address_input)
 322
 323     def recompute_style(self, element):
 324         self.style().unpolish(element)
 325         self.style().polish(element)
 326
 327     def copy_address(self):
 328         receive_popup = ReceivePopup(self.receive_button)
 329         self.actuator.copy_address(receive_popup)
 330
 331     def update_completions(self, completions):
 332         self.address_completions.setStringList(completions)
 333
 334     def update_history(self, tx_history):
 335         for tx in tx_history[-10:]:
 336             address = tx["dest_address"]
 337             amount = D(tx["value"]) / 10**8
 338             self.history_list.append(address, amount)
 339
 340     def acceptbit(self):
 341         self.actuator.acceptbit(self.quote_currencies[0])
 342
 343     def show_about(self):
 344         QMessageBox.about(self, "Electrum",
 345             _("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."))
 346
 347     def show_report_bug(self):
 348         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 349             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 350
 351     def show_history(self, toggle_state):
 352         if toggle_state:
 353             self.history_list.show()
 354         else:
 355             self.history_list.hide()
 356
 357 class BalanceLabel(QLabel):
 358
 359     SHOW_CONNECTING = 1
 360     SHOW_BALANCE = 2
 361     SHOW_AMOUNT = 3
 362
 363     def __init__(self, change_quote_currency, parent=None):
 364         super(QLabel, self).__init__(_("Connecting..."), parent)
 365         self.change_quote_currency = change_quote_currency
 366         self.state = self.SHOW_CONNECTING
 367         self.balance_text = ""
 368         self.amount_text = ""
 369
 370     def mousePressEvent(self, event):
 371         if self.state != self.SHOW_CONNECTING:
 372             self.change_quote_currency()
 373
 374     def set_balance_text(self, btc_balance, quote_text):
 375         if self.state == self.SHOW_CONNECTING:
 376             self.state = self.SHOW_BALANCE
 377         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)
 378         if self.state == self.SHOW_BALANCE:
 379             self.setText(self.balance_text)
 380
 381     def set_amount_text(self, quote_text):
 382         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 383         if self.state == self.SHOW_AMOUNT:
 384             self.setText(self.amount_text)
 385
 386     def show_balance(self):
 387         if self.state == self.SHOW_AMOUNT:
 388             self.state = self.SHOW_BALANCE
 389             self.setText(self.balance_text)
 390
 391     def show_amount(self):
 392         if self.state == self.SHOW_BALANCE:
 393             self.state = self.SHOW_AMOUNT
 394             self.setText(self.amount_text)
 395
 396 def ok_cancel_buttons(dialog):
 397     row_layout = QHBoxLayout()
 398     row_layout.addStretch(1)
 399     ok_button = QPushButton(_("OK"))
 400     row_layout.addWidget(ok_button)
 401     ok_button.clicked.connect(dialog.accept)
 402     cancel_button = QPushButton(_("Cancel"))
 403     row_layout.addWidget(cancel_button)
 404     cancel_button.clicked.connect(dialog.reject)
 405     return row_layout
 406
 407 class PasswordDialog(QDialog):
 408
 409     def __init__(self, parent):
 410         super(QDialog, self).__init__(parent)
 411
 412         self.setModal(True)
 413
 414         self.password_input = QLineEdit()
 415         self.password_input.setEchoMode(QLineEdit.Password)
 416
 417         main_layout = QVBoxLayout(self)
 418         message = _('Please enter your password')
 419         main_layout.addWidget(QLabel(message))
 420
 421         grid = QGridLayout()
 422         grid.setSpacing(8)
 423         grid.addWidget(QLabel(_('Password')), 1, 0)
 424         grid.addWidget(self.password_input, 1, 1)
 425         main_layout.addLayout(grid)
 426
 427         main_layout.addLayout(ok_cancel_buttons(self))
 428         self.setLayout(main_layout)
 429
 430     def run(self):
 431         if not self.exec_():
 432             return
 433         return unicode(self.password_input.text())
 434
 435 class ReceivePopup(QDialog):
 436
 437     def leaveEvent(self, event):
 438         self.close()
 439
 440     def setup(self, address):
 441         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 442         address_display = QLineEdit(address)
 443         address_display.setReadOnly(True)
 444         resize_line_edit_width(address_display, address)
 445
 446         main_layout = QVBoxLayout(self)
 447         main_layout.addWidget(label)
 448         main_layout.addWidget(address_display)
 449
 450         self.setMouseTracking(True)
 451         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 452         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|Qt.MSWindowsFixedSizeDialogHint)
 453         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 454         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 455         #self.setAlignment(Qt.AlignCenter)
 456
 457     def popup(self):
 458         parent = self.parent()
 459         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 460         self.move(top_left_pos)
 461         center_mouse_pos = self.mapToGlobal(self.rect().center())
 462         QCursor.setPos(center_mouse_pos)
 463         self.show()
 464
 465 class MiniActuator:
 466
 467     def __init__(self, wallet):
 468         self.wallet = wallet
 469
 470     def set_configured_currency(self, set_quote_currency):
 471         currency = self.wallet.conversion_currency
 472         # currency can be none when Electrum is used for the first
 473         # time and no setting has been created yet.
 474         if currency is not None:
 475             set_quote_currency(currency)
 476
 477     def set_config_currency(self, conversion_currency):
 478         self.wallet.conversion_currency = conversion_currency
 479
 480     def copy_address(self, receive_popup):
 481         addrs = [addr for addr in self.wallet.all_addresses()
 482                  if not self.wallet.is_change(addr)]
 483         # Select most recent addresses from gap limit
 484         addrs = addrs[-self.wallet.gap_limit:]
 485         copied_address = random.choice(addrs)
 486         qApp.clipboard().setText(copied_address)
 487         receive_popup.setup(copied_address)
 488         receive_popup.popup()
 489
 490     def send(self, address, amount, parent_window):
 491         dest_address = self.fetch_destination(address)
 492
 493         if dest_address is None or not self.wallet.is_valid(dest_address):
 494             QMessageBox.warning(parent_window, _('Error'),
 495                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 496             return False
 497
 498         convert_amount = lambda amount: \
 499             int(D(unicode(amount)) * bitcoin(1))
 500         amount = convert_amount(amount)
 501
 502         if self.wallet.use_encryption:
 503             password_dialog = PasswordDialog(parent_window)
 504             password = password_dialog.run()
 505             if not password:
 506                 return
 507         else:
 508             password = None
 509
 510         fee = 0
 511         # 0.1 BTC = 10000000
 512         if amount < bitcoin(1) / 10:
 513             # 0.001 BTC
 514             fee = bitcoin(1) / 1000
 515
 516         try:
 517             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 518         except BaseException as error:
 519             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 520             return False
 521
 522         status, message = self.wallet.sendtx(tx)
 523         if not status:
 524             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 525             return False
 526
 527         QMessageBox.information(parent_window, '',
 528             _('Payment sent.') + '\n' + message, _('OK'))
 529         return True
 530
 531     def fetch_destination(self, address):
 532         recipient = unicode(address).strip()
 533
 534         # alias
 535         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 536                           recipient)
 537
 538         # label or alias, with address in brackets
 539         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 540                           recipient)
 541
 542         if match1:
 543             dest_address = \
 544                 self.wallet.get_alias(recipient, True,
 545                                       self.show_message, self.question)
 546             return dest_address
 547         elif match2:
 548             return match2.group(2)
 549         else:
 550             return recipient
 551
 552     def is_valid(self, address):
 553         return self.wallet.is_valid(address)
 554
 555     def acceptbit(self, currency):
 556         master_pubkey = self.wallet.master_public_key.encode("hex")
 557         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 558         webbrowser.open(url)
 559
 560 class MiniDriver(QObject):
 561
 562     INITIALIZING = 0
 563     CONNECTING = 1
 564     SYNCHRONIZING = 2
 565     READY = 3
 566
 567     def __init__(self, wallet, window):
 568         super(QObject, self).__init__()
 569
 570         self.wallet = wallet
 571         self.window = window
 572
 573         self.wallet.register_callback(self.update_callback)
 574
 575         self.state = None
 576
 577         self.initializing()
 578         self.connect(self, SIGNAL("updatesignal()"), self.update)
 579         self.update_callback()
 580
 581     # This is a hack to workaround that Qt does not like changing the
 582     # window properties from this other thread before the runloop has
 583     # been called from.
 584     def update_callback(self):
 585         self.emit(SIGNAL("updatesignal()"))
 586
 587     def update(self):
 588         if not self.wallet.interface:
 589             self.initializing()
 590         elif not self.wallet.interface.is_connected:
 591             self.connecting()
 592         elif not self.wallet.blocks == -1:
 593             self.connecting()
 594         elif not self.wallet.is_up_to_date:
 595             self.synchronizing()
 596         else:
 597             self.ready()
 598
 599         if self.wallet.up_to_date:
 600             self.update_balance()
 601             self.update_completions()
 602             self.update_history()
 603
 604     def initializing(self):
 605         if self.state == self.INITIALIZING:
 606             return
 607         self.state = self.INITIALIZING
 608         self.window.deactivate()
 609
 610     def connecting(self):
 611         if self.state == self.CONNECTING:
 612             return
 613         self.state = self.CONNECTING
 614         self.window.deactivate()
 615
 616     def synchronizing(self):
 617         if self.state == self.SYNCHRONIZING:
 618             return
 619         self.state = self.SYNCHRONIZING
 620         self.window.deactivate()
 621
 622     def ready(self):
 623         if self.state == self.READY:
 624             return
 625         self.state = self.READY
 626         self.window.activate()
 627
 628     def update_balance(self):
 629         conf_balance, unconf_balance = self.wallet.get_balance()
 630         balance = D(conf_balance + unconf_balance)
 631         self.window.set_balances(balance)
 632
 633     def update_completions(self):
 634         completions = []
 635         for addr, label in self.wallet.labels.items():
 636             if addr in self.wallet.addressbook:
 637                 completions.append("%s <%s>" % (label, addr))
 638         completions = completions + self.wallet.aliases.keys()
 639         self.window.update_completions(completions)
 640
 641     def update_history(self):
 642         tx_history = self.wallet.get_tx_history()
 643         self.window.update_history(tx_history)
 644
 645 if __name__ == "__main__":
 646     app = QApplication(sys.argv)
 647     with open(rsrc("style.css")) as style_file:
 648         app.setStyleSheet(style_file.read())
 649     mini = MiniWindow()
 650     sys.exit(app.exec_())
 651