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