lib/gui_lite.py

   1 from PyQt4.QtCore import *
   2 from PyQt4.QtGui import *
   3 from decimal import Decimal as D
   4 from i18n import _
   5 import decimal
   6 import exchange_rate
   7 import random
   8 import re
   9 import sys
  10 import time
  11 import wallet
  12
  13 try:
  14     import lib.gui_qt as gui_qt
  15 except ImportError:
  16     import electrum.gui_qt as gui_qt
  17
  18 bitcoin = lambda v: v * 100000000
  19
  20 def IconButton(filename, parent=None):
  21     pixmap = QPixmap(filename)
  22     icon = QIcon(pixmap)
  23     return QPushButton(icon, "", parent)
  24
  25 class Timer(QThread):
  26     def run(self):
  27         while True:
  28             self.emit(SIGNAL('timersignal'))
  29             time.sleep(0.5)
  30
  31 class ElectrumGui:
  32
  33     def __init__(self, wallet):
  34         self.wallet = wallet
  35         self.app = QApplication(sys.argv)
  36         with open("data/style.css") as style_file:
  37             self.app.setStyleSheet(style_file.read())
  38
  39     def main(self, url):
  40         actuator = MiniActuator(self.wallet)
  41         self.mini = MiniWindow(actuator, self.expand)
  42         driver = MiniDriver(self.wallet, self.mini)
  43
  44         if url:
  45             self.set_url(url)
  46
  47         timer = Timer()
  48         timer.start()
  49         self.expert = gui_qt.ElectrumWindow(self.wallet)
  50         self.expert.app = self.app
  51         self.expert.connect_slots(timer)
  52         self.expert.update_wallet()
  53
  54         sys.exit(self.app.exec_())
  55
  56     def expand(self):
  57         self.mini.hide()
  58         self.expert.show()
  59
  60     def set_url(self, url):
  61         payto, amount, label, message, signature, identity, url = \
  62             self.wallet.parse_url(url, self.show_message, self.show_question)
  63         self.mini.set_payment_fields(payto, amount)
  64
  65     def show_message(self, message):
  66         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
  67
  68     def show_question(self, message):
  69         choice = QMessageBox.question(self.mini, _("Message"), message,
  70                                       QMessageBox.Yes|QMessageBox.No,
  71                                       QMessageBox.No)
  72         return choice == QMessageBox.Yes
  73
  74 class MiniWindow(QDialog):
  75
  76     def __init__(self, actuator, expand_callback):
  77         super(MiniWindow, self).__init__()
  78
  79         self.actuator = actuator
  80
  81         accounts_button = IconButton("data/icons/accounts.png")
  82         accounts_button.setObjectName("accounts_button")
  83
  84         self.accounts_selector = QMenu()
  85         accounts_button.setMenu(self.accounts_selector)
  86
  87         interact_button = IconButton("data/icons/interact.png")
  88         interact_button.setObjectName("interact_button")
  89
  90         app_menu = QMenu(interact_button)
  91         report_action = app_menu.addAction(_("&Report Bug"))
  92         about_action = app_menu.addAction(_("&About Electrum"))
  93         app_menu.addSeparator()
  94         quit_action = app_menu.addAction(_("&Quit"))
  95         interact_button.setMenu(app_menu)
  96
  97         self.connect(report_action, SIGNAL("triggered()"),
  98                      self.show_report_bug)
  99         self.connect(about_action, SIGNAL("triggered()"), self.show_about)
 100         self.connect(quit_action, SIGNAL("triggered()"), self.close)
 101
 102         expand_button = IconButton("data/icons/expand.png")
 103         expand_button.setObjectName("expand_button")
 104         self.connect(expand_button, SIGNAL("clicked()"), expand_callback)
 105
 106         self.btc_balance = None
 107         self.quote_currencies = ("EUR", "USD", "GBP")
 108         self.exchanger = exchange_rate.Exchanger(self)
 109         # Needed because price discovery is done in a different thread
 110         # which needs to be sent back to this main one to update the GUI
 111         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 112
 113         self.balance_label = BalanceLabel(self.change_quote_currency)
 114         self.balance_label.setObjectName("balance_label")
 115
 116         copy_button = QPushButton(_("&Copy Address"))
 117         copy_button.setObjectName("copy_button")
 118         copy_button.setDefault(True)
 119         self.connect(copy_button, SIGNAL("clicked()"),
 120                      self.actuator.copy_address)
 121
 122         self.address_input = TextedLineEdit(_("Enter a Bitcoin address..."))
 123         self.address_input.setObjectName("address_input")
 124         self.connect(self.address_input, SIGNAL("textEdited(QString)"),
 125                      self.address_field_changed)
 126         metrics = QFontMetrics(qApp.font())
 127         self.address_input.setMinimumWidth(
 128             metrics.width("1E4vM9q25xsyDwWwdqHUWnwshdWC9PykmL"))
 129
 130         self.address_completions = QStringListModel()
 131         address_completer = QCompleter(self.address_input)
 132         address_completer.setCaseSensitivity(False)
 133         address_completer.setModel(self.address_completions)
 134         self.address_input.setCompleter(address_completer)
 135         self.address_completions.setStringList(["1brmlab", "hello"])
 136
 137         self.valid_address = QCheckBox()
 138         self.valid_address.setObjectName("valid_address")
 139         self.valid_address.setEnabled(False)
 140         self.valid_address.setChecked(False)
 141
 142         address_layout = QHBoxLayout()
 143         address_layout.addWidget(self.address_input)
 144         address_layout.addWidget(self.valid_address)
 145
 146         self.amount_input = TextedLineEdit(_("... and amount"))
 147         self.amount_input.setObjectName("amount_input")
 148         # This is changed according to the user's displayed balance
 149         self.amount_validator = QDoubleValidator(self.amount_input)
 150         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 151         self.amount_validator.setDecimals(8)
 152         self.amount_input.setValidator(self.amount_validator)
 153
 154         self.connect(self.amount_input, SIGNAL("textChanged(QString)"),
 155                      self.amount_input_changed)
 156
 157         amount_layout = QHBoxLayout()
 158         amount_layout.addWidget(self.amount_input)
 159         amount_layout.addStretch()
 160
 161         send_button = QPushButton(_("&Send"))
 162         send_button.setObjectName("send_button")
 163         self.connect(send_button, SIGNAL("clicked()"), self.send)
 164
 165         main_layout = QGridLayout(self)
 166         main_layout.addWidget(accounts_button, 0, 0)
 167         main_layout.addWidget(interact_button, 1, 0)
 168         main_layout.addWidget(expand_button, 2, 0)
 169
 170         main_layout.addWidget(self.balance_label, 0, 1)
 171         main_layout.addWidget(copy_button, 0, 2)
 172
 173         main_layout.addLayout(address_layout, 1, 1, 1, -1)
 174
 175         main_layout.addLayout(amount_layout, 2, 1)
 176         main_layout.addWidget(send_button, 2, 2)
 177
 178         self.setWindowTitle("Electrum")
 179         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 180         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 181         self.setObjectName("main_window")
 182         self.show()
 183
 184     def closeEvent(self, event):
 185         super(MiniWindow, self).closeEvent(event)
 186         qApp.quit()
 187
 188     def set_payment_fields(self, dest_address, amount):
 189         self.address_input.become_active()
 190         self.address_input.setText(dest_address)
 191         self.address_field_changed(dest_address)
 192         self.amount_input.become_active()
 193         self.amount_input.setText(amount)
 194
 195     def activate(self):
 196         pass
 197
 198     def deactivate(self):
 199         pass
 200
 201     def change_quote_currency(self):
 202         self.quote_currencies = \
 203             self.quote_currencies[1:] + self.quote_currencies[0:1]
 204         self.refresh_balance()
 205
 206     def refresh_balance(self):
 207         if self.btc_balance is None:
 208             # Price has been discovered before wallet has been loaded
 209             # and server connect... so bail.
 210             return
 211         self.set_balances(self.btc_balance)
 212         self.amount_input_changed(self.amount_input.text())
 213
 214     def set_balances(self, btc_balance):
 215         self.btc_balance = btc_balance
 216         quote_text = self.create_quote_text(btc_balance)
 217         if quote_text:
 218             quote_text = "(%s)" % quote_text
 219         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 220         self.balance_label.set_balance_text(btc_balance, quote_text)
 221         main_account_info = \
 222             "Checking - %s BTC %s" % (btc_balance, quote_text)
 223         self.setWindowTitle("Electrum - %s" % main_account_info)
 224         self.accounts_selector.clear()
 225         self.accounts_selector.addAction("%s" % main_account_info)
 226
 227     def amount_input_changed(self, amount_text):
 228         try:
 229             amount = D(str(amount_text))
 230         except decimal.InvalidOperation:
 231             self.balance_label.show_balance()
 232         else:
 233             quote_text = self.create_quote_text(amount * bitcoin(1))
 234             if quote_text:
 235                 self.balance_label.set_amount_text(quote_text)
 236                 self.balance_label.show_amount()
 237             else:
 238                 self.balance_label.show_balance()
 239
 240     def create_quote_text(self, btc_balance):
 241         quote_currency = self.quote_currencies[0]
 242         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 243         if quote_balance is None:
 244             quote_text = ""
 245         else:
 246             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 247                                       quote_currency)
 248         return quote_text
 249
 250     def send(self):
 251         if self.actuator.send(self.address_input.text(),
 252                               self.amount_input.text(), self):
 253             self.address_input.become_inactive()
 254             self.amount_input.become_inactive()
 255
 256     def address_field_changed(self, address):
 257         if self.actuator.is_valid(address):
 258             self.valid_address.setChecked(True)
 259         else:
 260             self.valid_address.setChecked(False)
 261
 262     def update_completions(self, completions):
 263         self.address_completions.setStringList(completions)
 264
 265     def show_about(self):
 266         QMessageBox.about(self, "Electrum",
 267             _("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."))
 268
 269     def show_report_bug(self):
 270         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 271             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 272
 273 class BalanceLabel(QLabel):
 274
 275     SHOW_CONNECTING = 1
 276     SHOW_BALANCE = 2
 277     SHOW_AMOUNT = 3
 278
 279     def __init__(self, change_quote_currency, parent=None):
 280         super(QLabel, self).__init__(_("Connecting..."), parent)
 281         self.change_quote_currency = change_quote_currency
 282         self.state = self.SHOW_CONNECTING
 283         self.balance_text = ""
 284         self.amount_text = ""
 285
 286     def mousePressEvent(self, event):
 287         if self.state != self.SHOW_CONNECTING:
 288             self.change_quote_currency()
 289
 290     def set_balance_text(self, btc_balance, quote_text):
 291         if self.state == self.SHOW_CONNECTING:
 292             self.state = self.SHOW_BALANCE
 293         self.balance_text = "<span style='font-size: 16pt'>%s</span> <span style='font-size: 10pt'>BTC</span> <span style='font-size: 10pt'>%s</span>" % (btc_balance, quote_text)
 294         if self.state == self.SHOW_BALANCE:
 295             self.setText(self.balance_text)
 296
 297     def set_amount_text(self, quote_text):
 298         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 299         if self.state == self.SHOW_AMOUNT:
 300             self.setText(self.amount_text)
 301
 302     def show_balance(self):
 303         if self.state == self.SHOW_AMOUNT:
 304             self.state = self.SHOW_BALANCE
 305             self.setText(self.balance_text)
 306
 307     def show_amount(self):
 308         if self.state == self.SHOW_BALANCE:
 309             self.state = self.SHOW_AMOUNT
 310             self.setText(self.amount_text)
 311
 312 class TextedLineEdit(QLineEdit):
 313
 314     def __init__(self, inactive_text, parent=None):
 315         super(QLineEdit, self).__init__(parent)
 316         self.inactive_text = inactive_text
 317         self.become_inactive()
 318
 319     def mousePressEvent(self, event):
 320         if self.isReadOnly():
 321             self.become_active()
 322         QLineEdit.mousePressEvent(self, event)
 323
 324     def focusOutEvent(self, event):
 325         if self.text() == "":
 326             self.become_inactive()
 327         QLineEdit.focusOutEvent(self, event)
 328
 329     def focusInEvent(self, event):
 330         if self.isReadOnly():
 331             self.become_active()
 332         QLineEdit.focusInEvent(self, event)
 333
 334     def become_inactive(self):
 335         self.setText(self.inactive_text)
 336         self.setReadOnly(True)
 337         self.recompute_style()
 338
 339     def become_active(self):
 340         self.setText("")
 341         self.setReadOnly(False)
 342         self.recompute_style()
 343
 344     def recompute_style(self):
 345         qApp.style().unpolish(self)
 346         qApp.style().polish(self)
 347         # also possible but more expensive:
 348         #qApp.setStyleSheet(qApp.styleSheet())
 349
 350 def ok_cancel_buttons(dialog):
 351     row_layout = QHBoxLayout()
 352     row_layout.addStretch(1)
 353     ok_button = QPushButton("OK")
 354     row_layout.addWidget(ok_button)
 355     ok_button.clicked.connect(dialog.accept)
 356     cancel_button = QPushButton("Cancel")
 357     row_layout.addWidget(cancel_button)
 358     cancel_button.clicked.connect(dialog.reject)
 359     return row_layout
 360
 361 class PasswordDialog(QDialog):
 362
 363     def __init__(self, parent):
 364         super(QDialog, self).__init__(parent)
 365
 366         self.setModal(True)
 367
 368         self.password_input = QLineEdit()
 369         self.password_input.setEchoMode(QLineEdit.Password)
 370
 371         main_layout = QVBoxLayout(self)
 372         message = _('Please enter your password')
 373         main_layout.addWidget(QLabel(message))
 374
 375         grid = QGridLayout()
 376         grid.setSpacing(8)
 377         grid.addWidget(QLabel(_('Password')), 1, 0)
 378         grid.addWidget(self.password_input, 1, 1)
 379         main_layout.addLayout(grid)
 380
 381         main_layout.addLayout(ok_cancel_buttons(self))
 382         self.setLayout(main_layout)
 383
 384     def run(self):
 385         if not self.exec_():
 386             return
 387         return unicode(self.password_input.text())
 388
 389 class MiniActuator:
 390
 391     def __init__(self, wallet):
 392         self.wallet = wallet
 393
 394     def copy_address(self):
 395         addrs = [addr for addr in self.wallet.all_addresses()
 396                  if not self.wallet.is_change(addr)]
 397         qApp.clipboard().setText(random.choice(addrs))
 398
 399     def send(self, address, amount, parent_window):
 400         dest_address = self.fetch_destination(address)
 401
 402         if dest_address is None or not self.wallet.is_valid(dest_address):
 403             QMessageBox.warning(parent_window, _('Error'),
 404                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 405             return False
 406
 407         convert_amount = lambda amount: \
 408             int(D(unicode(amount)) * bitcoin(1))
 409         amount = convert_amount(amount)
 410
 411         if self.wallet.use_encryption:
 412             password_dialog = PasswordDialog(parent_window)
 413             password = password_dialog.run()
 414             if not password:
 415                 return
 416         else:
 417             password = None
 418
 419         fee = 0
 420         # 0.1 BTC = 10000000
 421         if amount < bitcoin(1) / 10:
 422             # 0.01 BTC
 423             fee = bitcoin(1) / 100
 424
 425         try:
 426             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 427         except BaseException as error:
 428             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 429             return False
 430
 431         status, message = self.wallet.sendtx(tx)
 432         if not status:
 433             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 434             return False
 435
 436         QMessageBox.information(parent_window, '',
 437             _('Payment sent.') + '\n' + message, _('OK'))
 438         return True
 439
 440     def fetch_destination(self, address):
 441         recipient = unicode(address).strip()
 442
 443         # alias
 444         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 445                           recipient)
 446
 447         # label or alias, with address in brackets
 448         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 449                           recipient)
 450
 451         if match1:
 452             dest_address = \
 453                 self.wallet.get_alias(recipient, True,
 454                                       self.show_message, self.question)
 455             return dest_address
 456         elif match2:
 457             return match2.group(2)
 458         else:
 459             return recipient
 460
 461     def is_valid(self, address):
 462         return self.wallet.is_valid(address)
 463
 464 class MiniDriver(QObject):
 465
 466     INITIALIZING = 0
 467     CONNECTING = 1
 468     SYNCHRONIZING = 2
 469     READY = 3
 470
 471     def __init__(self, wallet, window):
 472         super(QObject, self).__init__()
 473
 474         self.wallet = wallet
 475         self.window = window
 476
 477         self.wallet.register_callback(self.update_callback)
 478
 479         self.state = None
 480
 481         self.initializing()
 482         self.connect(self, SIGNAL("updatesignal()"), self.update)
 483
 484     # This is a hack to workaround that Qt does not like changing the
 485     # window properties from this other thread before the runloop has
 486     # been called from.
 487     def update_callback(self):
 488         self.emit(SIGNAL("updatesignal()"))
 489
 490     def update(self):
 491         if not self.wallet.interface:
 492             self.initializing()
 493         elif not self.wallet.interface.is_connected:
 494             self.connecting()
 495         elif not self.wallet.blocks == -1:
 496             self.connecting()
 497         elif not self.wallet.is_up_to_date:
 498             self.synchronizing()
 499         else:
 500             self.ready()
 501
 502         if self.wallet.up_to_date:
 503             self.update_balance()
 504             self.update_completions()
 505
 506     def initializing(self):
 507         if self.state == self.INITIALIZING:
 508             return
 509         self.state = self.INITIALIZING
 510         self.window.deactivate()
 511
 512     def connecting(self):
 513         if self.state == self.CONNECTING:
 514             return
 515         self.state = self.CONNECTING
 516         self.window.deactivate()
 517
 518     def synchronizing(self):
 519         if self.state == self.SYNCHRONIZING:
 520             return
 521         self.state = self.SYNCHRONIZING
 522         self.window.deactivate()
 523
 524     def ready(self):
 525         if self.state == self.READY:
 526             return
 527         self.state = self.READY
 528         self.window.activate()
 529
 530     def update_balance(self):
 531         conf_balance, unconf_balance = self.wallet.get_balance()
 532         balance = D(conf_balance + unconf_balance)
 533         self.window.set_balances(balance)
 534
 535     def update_completions(self):
 536         completions = []
 537         for addr, label in self.wallet.labels.items():
 538             if addr in self.wallet.addressbook:
 539                 completions.append("%s <%s>" % (label, addr))
 540         completions = completions + self.wallet.aliases.keys()
 541         self.window.update_completions(completions)
 542
 543 if __name__ == "__main__":
 544     app = QApplication(sys.argv)
 545     with open("data/style.css") as style_file:
 546         app.setStyleSheet(style_file.read())
 547     mini = MiniWindow()
 548     sys.exit(app.exec_())
 549