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()"),
 127                      self.copy_address)
 128
 129         self.address_input = TextedLineEdit(_("Enter a Bitcoin address..."))
 130         self.address_input.setObjectName("address_input")
 131         self.connect(self.address_input, SIGNAL("textEdited(QString)"),
 132                      self.address_field_changed)
 133         resize_line_edit_width(self.address_input,
 134                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 135
 136         self.address_completions = QStringListModel()
 137         address_completer = QCompleter(self.address_input)
 138         address_completer.setCaseSensitivity(False)
 139         address_completer.setModel(self.address_completions)
 140         self.address_input.setCompleter(address_completer)
 141
 142         address_layout = QHBoxLayout()
 143         address_layout.addWidget(self.address_input)
 144
 145         self.amount_input = TextedLineEdit(_("... and amount"))
 146         self.amount_input.setObjectName("amount_input")
 147         # This is changed according to the user's displayed balance
 148         self.amount_validator = QDoubleValidator(self.amount_input)
 149         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 150         self.amount_validator.setDecimals(8)
 151         self.amount_input.setValidator(self.amount_validator)
 152
 153         self.connect(self.amount_input, SIGNAL("textChanged(QString)"),
 154                      self.amount_input_changed)
 155
 156         amount_layout = QHBoxLayout()
 157         amount_layout.addWidget(self.amount_input)
 158         amount_layout.addStretch()
 159
 160         self.send_button = QPushButton(_("&Send"))
 161         self.send_button.setObjectName("send_button")
 162         self.send_button.setDisabled(True);
 163         self.connect(self.send_button, SIGNAL("clicked()"), self.send)
 164
 165         main_layout = QGridLayout(self)
 166
 167         main_layout.addWidget(self.balance_label, 0, 0)
 168         main_layout.addWidget(self.receive_button, 0, 1)
 169
 170         main_layout.addWidget(self.address_input, 1, 0, 1, -1)
 171
 172         main_layout.addLayout(amount_layout, 2, 0)
 173         main_layout.addWidget(self.send_button, 2, 1)
 174
 175         menubar = QMenuBar()
 176         file_menu = menubar.addMenu(_("&File"))
 177         file_menu.addAction(_("Open"))
 178         view_menu = menubar.addMenu(_("&View"))
 179         view_menu.addMenu(_("&Themes"))
 180         view_menu.addAction(_("Show History"))
 181
 182         settings_menu = menubar.addMenu(_("&Settings"))
 183         expert_gui = settings_menu.addAction(_("&Switch to expert GUI"))
 184         self.connect(expert_gui, SIGNAL("triggered()"), expand_callback)
 185
 186         menubar.addMenu(_("&Help"))
 187         main_layout.setMenuBar(menubar)
 188
 189         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 190         self.connect(quit_shortcut, SIGNAL("activated()"), self.close)
 191         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 192         self.connect(close_shortcut, SIGNAL("activated()"), self.close)
 193
 194         self.setWindowIcon(QIcon(":electrum.png"))
 195         self.setWindowTitle("Electrum")
 196         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 197         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 198         self.setObjectName("main_window")
 199         self.show()
 200
 201     def recompute_style(self):
 202         qApp.style().unpolish(self)
 203         qApp.style().polish(self)
 204
 205     def closeEvent(self, event):
 206         super(MiniWindow, self).closeEvent(event)
 207         qApp.quit()
 208
 209     def set_payment_fields(self, dest_address, amount):
 210         self.address_input.become_active()
 211         self.address_input.setText(dest_address)
 212         self.address_field_changed(dest_address)
 213         self.amount_input.become_active()
 214         self.amount_input.setText(amount)
 215
 216     def activate(self):
 217         pass
 218
 219     def deactivate(self):
 220         pass
 221
 222     def set_quote_currency(self, currency):
 223         assert currency in self.quote_currencies
 224         self.quote_currencies.remove(currency)
 225         self.quote_currencies = [currency] + self.quote_currencies
 226         self.refresh_balance()
 227
 228     def change_quote_currency(self):
 229         self.quote_currencies = \
 230             self.quote_currencies[1:] + self.quote_currencies[0:1]
 231         self.actuator.set_config_currency(self.quote_currencies[0])
 232         self.refresh_balance()
 233
 234     def refresh_balance(self):
 235         if self.btc_balance is None:
 236             # Price has been discovered before wallet has been loaded
 237             # and server connect... so bail.
 238             return
 239         self.set_balances(self.btc_balance)
 240         self.amount_input_changed(self.amount_input.text())
 241
 242     def set_balances(self, btc_balance):
 243         self.btc_balance = btc_balance
 244         quote_text = self.create_quote_text(btc_balance)
 245         if quote_text:
 246             quote_text = "(%s)" % quote_text
 247         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 248         self.balance_label.set_balance_text(btc_balance, quote_text)
 249         self.setWindowTitle("Electrum - %s BTC" % btc_balance)
 250
 251     def amount_input_changed(self, amount_text):
 252         self.check_button_status()
 253
 254         try:
 255             amount = D(str(amount_text))
 256         except decimal.InvalidOperation:
 257             self.balance_label.show_balance()
 258         else:
 259             quote_text = self.create_quote_text(amount * bitcoin(1))
 260             if quote_text:
 261                 self.balance_label.set_amount_text(quote_text)
 262                 self.balance_label.show_amount()
 263             else:
 264                 self.balance_label.show_balance()
 265
 266     def create_quote_text(self, btc_balance):
 267         quote_currency = self.quote_currencies[0]
 268         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 269         if quote_balance is None:
 270             quote_text = ""
 271         else:
 272             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 273                                       quote_currency)
 274         return quote_text
 275
 276     def send(self):
 277         if self.actuator.send(self.address_input.text(),
 278                               self.amount_input.text(), self):
 279             self.address_input.become_inactive()
 280             self.amount_input.become_inactive()
 281
 282     def check_button_status(self):
 283       if self.amount_input.text() != _("... and amount") and len(self.amount_input.text()) != 0:
 284         self.send_button.setDisabled(False)
 285       else:
 286         self.send_button.setDisabled(True)
 287
 288     def address_field_changed(self, address):
 289         if self.actuator.is_valid(address):
 290             self.check_button_status()
 291             self.address_input.setProperty("isValid", True)
 292             self.style().unpolish(self.address_input)
 293             self.style().polish(self.address_input)
 294         else:
 295             self.send_button.setDisabled(True)
 296             self.address_input.setProperty("isValid", False)
 297             self.style().unpolish(self.address_input)
 298             self.style().polish(self.address_input)
 299
 300     def copy_address(self):
 301         receive_popup = ReceivePopup(self.receive_button)
 302         self.actuator.copy_address(receive_popup)
 303
 304     def update_completions(self, completions):
 305         self.address_completions.setStringList(completions)
 306
 307     def acceptbit(self):
 308         self.actuator.acceptbit(self.quote_currencies[0])
 309
 310     def show_about(self):
 311         QMessageBox.about(self, "Electrum",
 312             _("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."))
 313
 314     def show_report_bug(self):
 315         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 316             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 317
 318 class BalanceLabel(QLabel):
 319
 320     SHOW_CONNECTING = 1
 321     SHOW_BALANCE = 2
 322     SHOW_AMOUNT = 3
 323
 324     def __init__(self, change_quote_currency, parent=None):
 325         super(QLabel, self).__init__(_("Connecting..."), parent)
 326         self.change_quote_currency = change_quote_currency
 327         self.state = self.SHOW_CONNECTING
 328         self.balance_text = ""
 329         self.amount_text = ""
 330
 331     def mousePressEvent(self, event):
 332         if self.state != self.SHOW_CONNECTING:
 333             self.change_quote_currency()
 334
 335     def set_balance_text(self, btc_balance, quote_text):
 336         if self.state == self.SHOW_CONNECTING:
 337             self.state = self.SHOW_BALANCE
 338         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)
 339         if self.state == self.SHOW_BALANCE:
 340             self.setText(self.balance_text)
 341
 342     def set_amount_text(self, quote_text):
 343         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 344         if self.state == self.SHOW_AMOUNT:
 345             self.setText(self.amount_text)
 346
 347     def show_balance(self):
 348         if self.state == self.SHOW_AMOUNT:
 349             self.state = self.SHOW_BALANCE
 350             self.setText(self.balance_text)
 351
 352     def show_amount(self):
 353         if self.state == self.SHOW_BALANCE:
 354             self.state = self.SHOW_AMOUNT
 355             self.setText(self.amount_text)
 356
 357 class TextedLineEdit(QLineEdit):
 358
 359     def __init__(self, inactive_text, parent=None):
 360         super(QLineEdit, self).__init__(parent)
 361         self.inactive_text = inactive_text
 362         self.become_inactive()
 363
 364     def mousePressEvent(self, event):
 365         if self.isReadOnly():
 366             self.become_active()
 367         QLineEdit.mousePressEvent(self, event)
 368
 369     def focusOutEvent(self, event):
 370         if self.text() == "":
 371             self.become_inactive()
 372         QLineEdit.focusOutEvent(self, event)
 373
 374     def focusInEvent(self, event):
 375         if self.isReadOnly():
 376             self.become_active()
 377         QLineEdit.focusInEvent(self, event)
 378
 379     def become_inactive(self):
 380         self.setReadOnly(True)
 381         self.recompute_style()
 382         self.setText(self.inactive_text)
 383
 384     def become_active(self):
 385         self.setReadOnly(False)
 386         self.recompute_style()
 387         self.setText("")
 388
 389     def recompute_style(self):
 390         qApp.style().unpolish(self)
 391         qApp.style().polish(self)
 392         # also possible but more expensive:
 393         #qApp.setStyleSheet(qApp.styleSheet())
 394
 395 def ok_cancel_buttons(dialog):
 396     row_layout = QHBoxLayout()
 397     row_layout.addStretch(1)
 398     ok_button = QPushButton(_("OK"))
 399     row_layout.addWidget(ok_button)
 400     ok_button.clicked.connect(dialog.accept)
 401     cancel_button = QPushButton(_("Cancel"))
 402     row_layout.addWidget(cancel_button)
 403     cancel_button.clicked.connect(dialog.reject)
 404     return row_layout
 405
 406 class PasswordDialog(QDialog):
 407
 408     def __init__(self, parent):
 409         super(QDialog, self).__init__(parent)
 410
 411         self.setModal(True)
 412
 413         self.password_input = QLineEdit()
 414         self.password_input.setEchoMode(QLineEdit.Password)
 415
 416         main_layout = QVBoxLayout(self)
 417         message = _('Please enter your password')
 418         main_layout.addWidget(QLabel(message))
 419
 420         grid = QGridLayout()
 421         grid.setSpacing(8)
 422         grid.addWidget(QLabel(_('Password')), 1, 0)
 423         grid.addWidget(self.password_input, 1, 1)
 424         main_layout.addLayout(grid)
 425
 426         main_layout.addLayout(ok_cancel_buttons(self))
 427         self.setLayout(main_layout)
 428
 429     def run(self):
 430         if not self.exec_():
 431             return
 432         return unicode(self.password_input.text())
 433
 434 class ReceivePopup(QDialog):
 435
 436     def leaveEvent(self, event):
 437         self.close()
 438
 439     def setup(self, address):
 440         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 441         address_display = QLineEdit(address)
 442         address_display.setReadOnly(True)
 443         resize_line_edit_width(address_display, address)
 444
 445         main_layout = QVBoxLayout(self)
 446         main_layout.addWidget(label)
 447         main_layout.addWidget(address_display)
 448
 449         self.setMouseTracking(True)
 450         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 451         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|Qt.MSWindowsFixedSizeDialogHint)
 452         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 453         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 454         #self.setAlignment(Qt.AlignCenter)
 455
 456     def popup(self):
 457         parent = self.parent()
 458         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 459         self.move(top_left_pos)
 460         center_mouse_pos = self.mapToGlobal(self.rect().center())
 461         QCursor.setPos(center_mouse_pos)
 462         self.show()
 463
 464 class MiniActuator:
 465
 466     def __init__(self, wallet):
 467         self.wallet = wallet
 468
 469     def set_configured_currency(self, set_quote_currency):
 470         currency = self.wallet.conversion_currency
 471         # currency can be none when Electrum is used for the first
 472         # time and no setting has been created yet.
 473         if currency is not None:
 474             set_quote_currency(currency)
 475
 476     def set_config_currency(self, conversion_currency):
 477         self.wallet.conversion_currency = conversion_currency
 478
 479     def copy_address(self, receive_popup):
 480         addrs = [addr for addr in self.wallet.all_addresses()
 481                  if not self.wallet.is_change(addr)]
 482         # Select most recent addresses from gap limit
 483         addrs = addrs[-self.wallet.gap_limit:]
 484         copied_address = random.choice(addrs)
 485         qApp.clipboard().setText(copied_address)
 486         receive_popup.setup(copied_address)
 487         receive_popup.popup()
 488
 489     def send(self, address, amount, parent_window):
 490         dest_address = self.fetch_destination(address)
 491
 492         if dest_address is None or not self.wallet.is_valid(dest_address):
 493             QMessageBox.warning(parent_window, _('Error'),
 494                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 495             return False
 496
 497         convert_amount = lambda amount: \
 498             int(D(unicode(amount)) * bitcoin(1))
 499         amount = convert_amount(amount)
 500
 501         if self.wallet.use_encryption:
 502             password_dialog = PasswordDialog(parent_window)
 503             password = password_dialog.run()
 504             if not password:
 505                 return
 506         else:
 507             password = None
 508
 509         fee = 0
 510         # 0.1 BTC = 10000000
 511         if amount < bitcoin(1) / 10:
 512             # 0.001 BTC
 513             fee = bitcoin(1) / 1000
 514
 515         try:
 516             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 517         except BaseException as error:
 518             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 519             return False
 520
 521         status, message = self.wallet.sendtx(tx)
 522         if not status:
 523             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 524             return False
 525
 526         QMessageBox.information(parent_window, '',
 527             _('Payment sent.') + '\n' + message, _('OK'))
 528         return True
 529
 530     def fetch_destination(self, address):
 531         recipient = unicode(address).strip()
 532
 533         # alias
 534         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 535                           recipient)
 536
 537         # label or alias, with address in brackets
 538         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 539                           recipient)
 540
 541         if match1:
 542             dest_address = \
 543                 self.wallet.get_alias(recipient, True,
 544                                       self.show_message, self.question)
 545             return dest_address
 546         elif match2:
 547             return match2.group(2)
 548         else:
 549             return recipient
 550
 551     def is_valid(self, address):
 552         return self.wallet.is_valid(address)
 553
 554     def acceptbit(self, currency):
 555         master_pubkey = self.wallet.master_public_key.encode("hex")
 556         url = "http://acceptbit.com/mpk/%s/%s" % (master_pubkey, currency)
 557         webbrowser.open(url)
 558
 559 class MiniDriver(QObject):
 560
 561     INITIALIZING = 0
 562     CONNECTING = 1
 563     SYNCHRONIZING = 2
 564     READY = 3
 565
 566     def __init__(self, wallet, window):
 567         super(QObject, self).__init__()
 568
 569         self.wallet = wallet
 570         self.window = window
 571
 572         self.wallet.register_callback(self.update_callback)
 573
 574         self.state = None
 575
 576         self.initializing()
 577         self.connect(self, SIGNAL("updatesignal()"), self.update)
 578         self.update_callback()
 579
 580     # This is a hack to workaround that Qt does not like changing the
 581     # window properties from this other thread before the runloop has
 582     # been called from.
 583     def update_callback(self):
 584         self.emit(SIGNAL("updatesignal()"))
 585
 586     def update(self):
 587         if not self.wallet.interface:
 588             self.initializing()
 589         elif not self.wallet.interface.is_connected:
 590             self.connecting()
 591         elif not self.wallet.blocks == -1:
 592             self.connecting()
 593         elif not self.wallet.is_up_to_date:
 594             self.synchronizing()
 595         else:
 596             self.ready()
 597
 598         if self.wallet.up_to_date:
 599             self.update_balance()
 600             self.update_completions()
 601
 602     def initializing(self):
 603         if self.state == self.INITIALIZING:
 604             return
 605         self.state = self.INITIALIZING
 606         self.window.deactivate()
 607
 608     def connecting(self):
 609         if self.state == self.CONNECTING:
 610             return
 611         self.state = self.CONNECTING
 612         self.window.deactivate()
 613
 614     def synchronizing(self):
 615         if self.state == self.SYNCHRONIZING:
 616             return
 617         self.state = self.SYNCHRONIZING
 618         self.window.deactivate()
 619
 620     def ready(self):
 621         if self.state == self.READY:
 622             return
 623         self.state = self.READY
 624         self.window.activate()
 625
 626     def update_balance(self):
 627         conf_balance, unconf_balance = self.wallet.get_balance()
 628         balance = D(conf_balance + unconf_balance)
 629         self.window.set_balances(balance)
 630
 631     def update_completions(self):
 632         completions = []
 633         for addr, label in self.wallet.labels.items():
 634             if addr in self.wallet.addressbook:
 635                 completions.append("%s <%s>" % (label, addr))
 636         completions = completions + self.wallet.aliases.keys()
 637         self.window.update_completions(completions)
 638
 639 if __name__ == "__main__":
 640     app = QApplication(sys.argv)
 641     with open(rsrc("style.css")) as style_file:
 642         app.setStyleSheet(style_file.read())
 643     mini = MiniWindow()
 644     sys.exit(app.exec_())
 645