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
  15 try:
  16     import lib.gui_qt as gui_qt
  17 except ImportError:
  18     import electrum.gui_qt as gui_qt
  19
  20 bitcoin = lambda v: v * 100000000
  21
  22 def IconButton(filename, parent=None):
  23     pixmap = QPixmap(filename)
  24     icon = QIcon(pixmap)
  25     return QPushButton(icon, "", parent)
  26
  27 class Timer(QThread):
  28     def run(self):
  29         while True:
  30             self.emit(SIGNAL('timersignal'))
  31             time.sleep(0.5)
  32
  33 def resize_line_edit_width(line_edit, text_input):
  34     metrics = QFontMetrics(qApp.font())
  35     # Create an extra character to add some space on the end
  36     text_input += "A"
  37     line_edit.setMinimumWidth(metrics.width(text_input))
  38
  39 class ElectrumGui:
  40
  41     def __init__(self, wallet):
  42         self.wallet = wallet
  43         self.app = QApplication(sys.argv)
  44         if os.path.exists("data"):
  45             QDir.setCurrent("data")
  46         else:
  47             QDir.setCurrent(appdata_dir())
  48         with open(rsrc("style.css")) as style_file:
  49             self.app.setStyleSheet(style_file.read())
  50
  51     def main(self, url):
  52         actuator = MiniActuator(self.wallet)
  53         self.mini = MiniWindow(actuator, self.expand)
  54         driver = MiniDriver(self.wallet, self.mini)
  55
  56         if url:
  57             self.set_url(url)
  58
  59         timer = Timer()
  60         timer.start()
  61         self.expert = gui_qt.ElectrumWindow(self.wallet)
  62         self.expert.app = self.app
  63         self.expert.connect_slots(timer)
  64         self.expert.update_wallet()
  65
  66         self.app.exec_()
  67
  68     def expand(self):
  69         self.mini.hide()
  70         self.expert.show()
  71
  72     def set_url(self, url):
  73         payto, amount, label, message, signature, identity, url = \
  74             self.wallet.parse_url(url, self.show_message, self.show_question)
  75         self.mini.set_payment_fields(payto, amount)
  76
  77     def show_message(self, message):
  78         QMessageBox.information(self.mini, _("Message"), message, _("OK"))
  79
  80     def show_question(self, message):
  81         choice = QMessageBox.question(self.mini, _("Message"), message,
  82                                       QMessageBox.Yes|QMessageBox.No,
  83                                       QMessageBox.No)
  84         return choice == QMessageBox.Yes
  85
  86     def restore_or_create(self):
  87         qt_gui_object = gui_qt.ElectrumGui(self.wallet, self.app)
  88         return qt_gui_object.restore_or_create()
  89
  90 class MiniWindow(QDialog):
  91
  92     def __init__(self, actuator, expand_callback):
  93         super(MiniWindow, self).__init__()
  94
  95         self.actuator = actuator
  96
  97         accounts_button = IconButton(rsrc("icons", "accounts.png"))
  98         accounts_button.setObjectName("accounts_button")
  99
 100         self.accounts_selector = QMenu()
 101         accounts_button.setMenu(self.accounts_selector)
 102
 103         interact_button = IconButton(rsrc("icons", "interact.png"))
 104         interact_button.setObjectName("interact_button")
 105
 106         app_menu = QMenu(interact_button)
 107         report_action = app_menu.addAction(_("&Report Bug"))
 108         about_action = app_menu.addAction(_("&About Electrum"))
 109         app_menu.addSeparator()
 110         quit_action = app_menu.addAction(_("&Quit"))
 111         interact_button.setMenu(app_menu)
 112
 113         self.connect(report_action, SIGNAL("triggered()"),
 114                      self.show_report_bug)
 115         self.connect(about_action, SIGNAL("triggered()"), self.show_about)
 116         self.connect(quit_action, SIGNAL("triggered()"), self.close)
 117
 118         expand_button = IconButton(rsrc("icons", "expand.png"))
 119         expand_button.setObjectName("expand_button")
 120         self.connect(expand_button, SIGNAL("clicked()"), expand_callback)
 121
 122         self.btc_balance = None
 123         self.quote_currencies = ["EUR", "USD", "GBP"]
 124         self.actuator.set_configured_currency(self.set_quote_currency)
 125         self.exchanger = exchange_rate.Exchanger(self)
 126         # Needed because price discovery is done in a different thread
 127         # which needs to be sent back to this main one to update the GUI
 128         self.connect(self, SIGNAL("refresh_balance()"), self.refresh_balance)
 129
 130         self.balance_label = BalanceLabel(self.change_quote_currency)
 131         self.balance_label.setObjectName("balance_label")
 132
 133         self.receive_button = QPushButton(_("&Receive"))
 134         self.receive_button.setObjectName("receive_button")
 135         self.receive_button.setDefault(True)
 136         self.connect(self.receive_button, SIGNAL("clicked()"),
 137                      self.copy_address)
 138
 139         self.address_input = TextedLineEdit(_("Enter a Bitcoin address..."))
 140         self.address_input.setObjectName("address_input")
 141         self.connect(self.address_input, SIGNAL("textEdited(QString)"),
 142                      self.address_field_changed)
 143         resize_line_edit_width(self.address_input,
 144                                "1BtaFUr3qVvAmwrsuDuu5zk6e4s2rxd2Gy")
 145
 146         self.address_completions = QStringListModel()
 147         address_completer = QCompleter(self.address_input)
 148         address_completer.setCaseSensitivity(False)
 149         address_completer.setModel(self.address_completions)
 150         self.address_input.setCompleter(address_completer)
 151
 152         self.valid_address = QCheckBox()
 153         self.valid_address.setObjectName("valid_address")
 154         self.valid_address.setEnabled(False)
 155         self.valid_address.setChecked(False)
 156
 157         address_layout = QHBoxLayout()
 158         address_layout.addWidget(self.address_input)
 159         address_layout.addWidget(self.valid_address)
 160
 161         self.amount_input = TextedLineEdit(_("... and amount"))
 162         self.amount_input.setObjectName("amount_input")
 163         # This is changed according to the user's displayed balance
 164         self.amount_validator = QDoubleValidator(self.amount_input)
 165         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
 166         self.amount_validator.setDecimals(8)
 167         self.amount_input.setValidator(self.amount_validator)
 168
 169         self.connect(self.amount_input, SIGNAL("textChanged(QString)"),
 170                      self.amount_input_changed)
 171
 172         amount_layout = QHBoxLayout()
 173         amount_layout.addWidget(self.amount_input)
 174         amount_layout.addStretch()
 175
 176         send_button = QPushButton(_("&Send"))
 177         send_button.setObjectName("send_button")
 178         self.connect(send_button, SIGNAL("clicked()"), self.send)
 179
 180         main_layout = QGridLayout(self)
 181         main_layout.addWidget(accounts_button, 0, 0)
 182         main_layout.addWidget(interact_button, 1, 0)
 183         main_layout.addWidget(expand_button, 2, 0)
 184
 185         main_layout.addWidget(self.balance_label, 0, 1)
 186         main_layout.addWidget(self.receive_button, 0, 2)
 187
 188         main_layout.addLayout(address_layout, 1, 1, 1, -1)
 189
 190         main_layout.addLayout(amount_layout, 2, 1)
 191         main_layout.addWidget(send_button, 2, 2)
 192
 193         quit_shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
 194         self.connect(quit_shortcut, SIGNAL("activated()"), self.close)
 195         close_shortcut = QShortcut(QKeySequence("Ctrl+W"), self)
 196         self.connect(close_shortcut, SIGNAL("activated()"), self.close)
 197
 198         self.setWindowTitle("Electrum")
 199         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 200         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 201         self.setObjectName("main_window")
 202         self.show()
 203
 204     def closeEvent(self, event):
 205         super(MiniWindow, self).closeEvent(event)
 206         qApp.quit()
 207
 208     def set_payment_fields(self, dest_address, amount):
 209         self.address_input.become_active()
 210         self.address_input.setText(dest_address)
 211         self.address_field_changed(dest_address)
 212         self.amount_input.become_active()
 213         self.amount_input.setText(amount)
 214
 215     def activate(self):
 216         pass
 217
 218     def deactivate(self):
 219         pass
 220
 221     def set_quote_currency(self, currency):
 222         assert currency in self.quote_currencies
 223         self.quote_currencies.remove(currency)
 224         self.quote_currencies = [currency] + self.quote_currencies
 225         self.refresh_balance()
 226
 227     def change_quote_currency(self):
 228         self.quote_currencies = \
 229             self.quote_currencies[1:] + self.quote_currencies[0:1]
 230         self.actuator.set_config_currency(self.quote_currencies[0])
 231         self.refresh_balance()
 232
 233     def refresh_balance(self):
 234         if self.btc_balance is None:
 235             # Price has been discovered before wallet has been loaded
 236             # and server connect... so bail.
 237             return
 238         self.set_balances(self.btc_balance)
 239         self.amount_input_changed(self.amount_input.text())
 240
 241     def set_balances(self, btc_balance):
 242         self.btc_balance = btc_balance
 243         quote_text = self.create_quote_text(btc_balance)
 244         if quote_text:
 245             quote_text = "(%s)" % quote_text
 246         btc_balance = "%.2f" % (btc_balance / bitcoin(1))
 247         self.balance_label.set_balance_text(btc_balance, quote_text)
 248         main_account_info = \
 249             "Checking - %s BTC" % btc_balance
 250         self.setWindowTitle("Electrum - %s" % main_account_info)
 251         self.accounts_selector.clear()
 252         self.accounts_selector.addAction("%s %s" % (main_account_info,
 253                                                     quote_text))
 254
 255     def amount_input_changed(self, amount_text):
 256         try:
 257             amount = D(str(amount_text))
 258         except decimal.InvalidOperation:
 259             self.balance_label.show_balance()
 260         else:
 261             quote_text = self.create_quote_text(amount * bitcoin(1))
 262             if quote_text:
 263                 self.balance_label.set_amount_text(quote_text)
 264                 self.balance_label.show_amount()
 265             else:
 266                 self.balance_label.show_balance()
 267
 268     def create_quote_text(self, btc_balance):
 269         quote_currency = self.quote_currencies[0]
 270         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
 271         if quote_balance is None:
 272             quote_text = ""
 273         else:
 274             quote_text = "%.2f %s" % ((quote_balance / bitcoin(1)),
 275                                       quote_currency)
 276         return quote_text
 277
 278     def send(self):
 279         if self.actuator.send(self.address_input.text(),
 280                               self.amount_input.text(), self):
 281             self.address_input.become_inactive()
 282             self.amount_input.become_inactive()
 283
 284     def address_field_changed(self, address):
 285         if self.actuator.is_valid(address):
 286             self.valid_address.setChecked(True)
 287         else:
 288             self.valid_address.setChecked(False)
 289
 290     def copy_address(self):
 291         receive_popup = ReceivePopup(self.receive_button)
 292         self.actuator.copy_address(receive_popup)
 293
 294     def update_completions(self, completions):
 295         self.address_completions.setStringList(completions)
 296
 297     def show_about(self):
 298         QMessageBox.about(self, "Electrum",
 299             _("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."))
 300
 301     def show_report_bug(self):
 302         QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"),
 303             _("Email bug reports to %s") % "genjix" + "@" + "riseup.net")
 304
 305 class BalanceLabel(QLabel):
 306
 307     SHOW_CONNECTING = 1
 308     SHOW_BALANCE = 2
 309     SHOW_AMOUNT = 3
 310
 311     def __init__(self, change_quote_currency, parent=None):
 312         super(QLabel, self).__init__(_("Connecting..."), parent)
 313         self.change_quote_currency = change_quote_currency
 314         self.state = self.SHOW_CONNECTING
 315         self.balance_text = ""
 316         self.amount_text = ""
 317
 318     def mousePressEvent(self, event):
 319         if self.state != self.SHOW_CONNECTING:
 320             self.change_quote_currency()
 321
 322     def set_balance_text(self, btc_balance, quote_text):
 323         if self.state == self.SHOW_CONNECTING:
 324             self.state = self.SHOW_BALANCE
 325         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)
 326         if self.state == self.SHOW_BALANCE:
 327             self.setText(self.balance_text)
 328
 329     def set_amount_text(self, quote_text):
 330         self.amount_text = "<span style='font-size: 10pt'>%s</span>" % quote_text
 331         if self.state == self.SHOW_AMOUNT:
 332             self.setText(self.amount_text)
 333
 334     def show_balance(self):
 335         if self.state == self.SHOW_AMOUNT:
 336             self.state = self.SHOW_BALANCE
 337             self.setText(self.balance_text)
 338
 339     def show_amount(self):
 340         if self.state == self.SHOW_BALANCE:
 341             self.state = self.SHOW_AMOUNT
 342             self.setText(self.amount_text)
 343
 344 class TextedLineEdit(QLineEdit):
 345
 346     def __init__(self, inactive_text, parent=None):
 347         super(QLineEdit, self).__init__(parent)
 348         self.inactive_text = inactive_text
 349         self.become_inactive()
 350
 351     def mousePressEvent(self, event):
 352         if self.isReadOnly():
 353             self.become_active()
 354         QLineEdit.mousePressEvent(self, event)
 355
 356     def focusOutEvent(self, event):
 357         if self.text() == "":
 358             self.become_inactive()
 359         QLineEdit.focusOutEvent(self, event)
 360
 361     def focusInEvent(self, event):
 362         if self.isReadOnly():
 363             self.become_active()
 364         QLineEdit.focusInEvent(self, event)
 365
 366     def become_inactive(self):
 367         self.setText(self.inactive_text)
 368         self.setReadOnly(True)
 369         self.recompute_style()
 370
 371     def become_active(self):
 372         self.setText("")
 373         self.setReadOnly(False)
 374         self.recompute_style()
 375
 376     def recompute_style(self):
 377         qApp.style().unpolish(self)
 378         qApp.style().polish(self)
 379         # also possible but more expensive:
 380         #qApp.setStyleSheet(qApp.styleSheet())
 381
 382 def ok_cancel_buttons(dialog):
 383     row_layout = QHBoxLayout()
 384     row_layout.addStretch(1)
 385     ok_button = QPushButton(_("OK"))
 386     row_layout.addWidget(ok_button)
 387     ok_button.clicked.connect(dialog.accept)
 388     cancel_button = QPushButton(_("Cancel"))
 389     row_layout.addWidget(cancel_button)
 390     cancel_button.clicked.connect(dialog.reject)
 391     return row_layout
 392
 393 class PasswordDialog(QDialog):
 394
 395     def __init__(self, parent):
 396         super(QDialog, self).__init__(parent)
 397
 398         self.setModal(True)
 399
 400         self.password_input = QLineEdit()
 401         self.password_input.setEchoMode(QLineEdit.Password)
 402
 403         main_layout = QVBoxLayout(self)
 404         message = _('Please enter your password')
 405         main_layout.addWidget(QLabel(message))
 406
 407         grid = QGridLayout()
 408         grid.setSpacing(8)
 409         grid.addWidget(QLabel(_('Password')), 1, 0)
 410         grid.addWidget(self.password_input, 1, 1)
 411         main_layout.addLayout(grid)
 412
 413         main_layout.addLayout(ok_cancel_buttons(self))
 414         self.setLayout(main_layout)
 415
 416     def run(self):
 417         if not self.exec_():
 418             return
 419         return unicode(self.password_input.text())
 420
 421 class ReceivePopup(QDialog):
 422
 423     def leaveEvent(self, event):
 424         self.close()
 425
 426     def setup(self, address):
 427         label = QLabel(_("Copied your Bitcoin address to the clipboard!"))
 428         address_display = QLineEdit(address)
 429         address_display.setReadOnly(True)
 430         resize_line_edit_width(address_display, address)
 431
 432         main_layout = QVBoxLayout(self)
 433         main_layout.addWidget(label)
 434         main_layout.addWidget(address_display)
 435
 436         self.setMouseTracking(True)
 437         self.setWindowTitle("Electrum - " + _("Receive Bitcoin payment"))
 438         self.setWindowFlags(Qt.Window|Qt.FramelessWindowHint|Qt.MSWindowsFixedSizeDialogHint)
 439         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 440         #self.setFrameStyle(QFrame.WinPanel|QFrame.Raised)
 441         #self.setAlignment(Qt.AlignCenter)
 442
 443     def popup(self):
 444         parent = self.parent()
 445         top_left_pos = parent.mapToGlobal(parent.rect().bottomLeft())
 446         self.move(top_left_pos)
 447         center_mouse_pos = self.mapToGlobal(self.rect().center())
 448         QCursor.setPos(center_mouse_pos)
 449         self.show()
 450
 451 class MiniActuator:
 452
 453     def __init__(self, wallet):
 454         self.wallet = wallet
 455
 456     def set_configured_currency(self, set_quote_currency):
 457         currency = self.wallet.conversion_currency
 458         # currency can be none when Electrum is used for the first
 459         # time and no setting has been created yet.
 460         if currency is not None:
 461             set_quote_currency(currency)
 462
 463     def set_config_currency(self, conversion_currency):
 464         self.wallet.conversion_currency = conversion_currency
 465
 466     def copy_address(self, receive_popup):
 467         addrs = [addr for addr in self.wallet.all_addresses()
 468                  if not self.wallet.is_change(addr)]
 469         # Select most recent addresses from gap limit
 470         addrs = addrs[-self.wallet.gap_limit:]
 471         copied_address = random.choice(addrs)
 472         qApp.clipboard().setText(copied_address)
 473         receive_popup.setup(copied_address)
 474         receive_popup.popup()
 475
 476     def send(self, address, amount, parent_window):
 477         dest_address = self.fetch_destination(address)
 478
 479         if dest_address is None or not self.wallet.is_valid(dest_address):
 480             QMessageBox.warning(parent_window, _('Error'),
 481                 _('Invalid Bitcoin Address') + ':\n' + address, _('OK'))
 482             return False
 483
 484         convert_amount = lambda amount: \
 485             int(D(unicode(amount)) * bitcoin(1))
 486         amount = convert_amount(amount)
 487
 488         if self.wallet.use_encryption:
 489             password_dialog = PasswordDialog(parent_window)
 490             password = password_dialog.run()
 491             if not password:
 492                 return
 493         else:
 494             password = None
 495
 496         fee = 0
 497         # 0.1 BTC = 10000000
 498         if amount < bitcoin(1) / 10:
 499             # 0.01 BTC
 500             fee = bitcoin(1) / 100
 501
 502         try:
 503             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 504         except BaseException as error:
 505             QMessageBox.warning(parent_window, _('Error'), str(error), _('OK'))
 506             return False
 507
 508         status, message = self.wallet.sendtx(tx)
 509         if not status:
 510             QMessageBox.warning(parent_window, _('Error'), message, _('OK'))
 511             return False
 512
 513         QMessageBox.information(parent_window, '',
 514             _('Payment sent.') + '\n' + message, _('OK'))
 515         return True
 516
 517     def fetch_destination(self, address):
 518         recipient = unicode(address).strip()
 519
 520         # alias
 521         match1 = re.match("^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$",
 522                           recipient)
 523
 524         # label or alias, with address in brackets
 525         match2 = re.match("(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>",
 526                           recipient)
 527
 528         if match1:
 529             dest_address = \
 530                 self.wallet.get_alias(recipient, True,
 531                                       self.show_message, self.question)
 532             return dest_address
 533         elif match2:
 534             return match2.group(2)
 535         else:
 536             return recipient
 537
 538     def is_valid(self, address):
 539         return self.wallet.is_valid(address)
 540
 541 class MiniDriver(QObject):
 542
 543     INITIALIZING = 0
 544     CONNECTING = 1
 545     SYNCHRONIZING = 2
 546     READY = 3
 547
 548     def __init__(self, wallet, window):
 549         super(QObject, self).__init__()
 550
 551         self.wallet = wallet
 552         self.window = window
 553
 554         self.wallet.register_callback(self.update_callback)
 555
 556         self.state = None
 557
 558         self.initializing()
 559         self.connect(self, SIGNAL("updatesignal()"), self.update)
 560         self.update_callback()
 561
 562     # This is a hack to workaround that Qt does not like changing the
 563     # window properties from this other thread before the runloop has
 564     # been called from.
 565     def update_callback(self):
 566         self.emit(SIGNAL("updatesignal()"))
 567
 568     def update(self):
 569         if not self.wallet.interface:
 570             self.initializing()
 571         elif not self.wallet.interface.is_connected:
 572             self.connecting()
 573         elif not self.wallet.blocks == -1:
 574             self.connecting()
 575         elif not self.wallet.is_up_to_date:
 576             self.synchronizing()
 577         else:
 578             self.ready()
 579
 580         if self.wallet.up_to_date:
 581             self.update_balance()
 582             self.update_completions()
 583
 584     def initializing(self):
 585         if self.state == self.INITIALIZING:
 586             return
 587         self.state = self.INITIALIZING
 588         self.window.deactivate()
 589
 590     def connecting(self):
 591         if self.state == self.CONNECTING:
 592             return
 593         self.state = self.CONNECTING
 594         self.window.deactivate()
 595
 596     def synchronizing(self):
 597         if self.state == self.SYNCHRONIZING:
 598             return
 599         self.state = self.SYNCHRONIZING
 600         self.window.deactivate()
 601
 602     def ready(self):
 603         if self.state == self.READY:
 604             return
 605         self.state = self.READY
 606         self.window.activate()
 607
 608     def update_balance(self):
 609         conf_balance, unconf_balance = self.wallet.get_balance()
 610         balance = D(conf_balance + unconf_balance)
 611         self.window.set_balances(balance)
 612
 613     def update_completions(self):
 614         completions = []
 615         for addr, label in self.wallet.labels.items():
 616             if addr in self.wallet.addressbook:
 617                 completions.append("%s <%s>" % (label, addr))
 618         completions = completions + self.wallet.aliases.keys()
 619         self.window.update_completions(completions)
 620
 621 if __name__ == "__main__":
 622     app = QApplication(sys.argv)
 623     with open(rsrc("style.css")) as style_file:
 624         app.setStyleSheet(style_file.read())
 625     mini = MiniWindow()
 626     sys.exit(app.exec_())
 627