lib/gui_lite.py

   1 from PyQt4.QtCore import *
   2 from PyQt4.QtGui import *
   3 from i18n import _
   4 import decimal
   5 import random
   6 import re
   7 import sys
   8
   9 def IconButton(filename, parent=None):
  10     pixmap = QPixmap(filename)
  11     icon = QIcon(pixmap)
  12     return QPushButton(icon, "", parent)
  13
  14 class ElectrumGui:
  15
  16     def __init__(self, wallet):
  17         self.wallet = wallet
  18         self.app = QApplication(sys.argv)
  19         with open("data/style.css") as style_file:
  20             self.app.setStyleSheet(style_file.read())
  21
  22     def main(self, url):
  23         actuator = MiniActuator(self.wallet)
  24         mini = MiniWindow(actuator)
  25         driver = MiniDriver(self.wallet, mini)
  26         sys.exit(self.app.exec_())
  27
  28 class MiniWindow(QDialog):
  29
  30     def __init__(self, actuator):
  31         super(MiniWindow, self).__init__()
  32
  33         self.actuator = actuator
  34
  35         accounts_button = IconButton("data/icons/accounts.png")
  36         accounts_button.setObjectName("accounts_button")
  37
  38         self.accounts_selector = QMenu()
  39         accounts_button.setMenu(self.accounts_selector)
  40
  41         interact_button = IconButton("data/icons/interact.png")
  42         interact_button.setObjectName("interact_button")
  43
  44         app_menu = QMenu()
  45         interact_button.setMenu(app_menu)
  46
  47         expand_button = IconButton("data/icons/expand.png")
  48         expand_button.setObjectName("expand_button")
  49
  50         self.balance_label = BalanceLabel()
  51         self.balance_label.setObjectName("balance_label")
  52
  53         copy_button = QPushButton(_("&Copy Address"))
  54         copy_button.setObjectName("copy_button")
  55         copy_button.setDefault(True)
  56         self.connect(copy_button, SIGNAL("clicked()"),
  57                      self.actuator.copy_address)
  58
  59         # Use QCompleter
  60         self.address_input = TextedLineEdit(_("Enter a Bitcoin address..."))
  61         self.address_input.setObjectName("address_input")
  62         self.connect(self.address_input, SIGNAL("textChanged(QString)"),
  63                      self.address_field_changed)
  64         metrics = QFontMetrics(qApp.font())
  65         self.address_input.setMinimumWidth(
  66             metrics.width("1E4vM9q25xsyDwWwdqHUWnwshdWC9PykmL"))
  67
  68         self.valid_address = QCheckBox()
  69         self.valid_address.setObjectName("valid_address")
  70         self.valid_address.setEnabled(False)
  71         self.valid_address.setChecked(False)
  72
  73         address_layout = QHBoxLayout()
  74         address_layout.addWidget(self.address_input)
  75         address_layout.addWidget(self.valid_address)
  76
  77         self.amount_input = TextedLineEdit(_("... and amount"))
  78         self.amount_input.setObjectName("amount_input")
  79         # This is changed according to the user's displayed balance
  80         self.amount_validator = QDoubleValidator(self.amount_input)
  81         self.amount_validator.setNotation(QDoubleValidator.StandardNotation)
  82         self.amount_validator.setRange(0, 0)
  83         self.amount_validator.setDecimals(2)
  84         self.amount_input.setValidator(self.amount_validator)
  85
  86         amount_layout = QHBoxLayout()
  87         amount_layout.addWidget(self.amount_input)
  88         amount_layout.addStretch()
  89
  90         send_button = QPushButton(_("&Send"))
  91         send_button.setObjectName("send_button")
  92         self.connect(send_button, SIGNAL("clicked()"), self.send)
  93
  94         main_layout = QGridLayout(self)
  95         main_layout.addWidget(accounts_button, 0, 0)
  96         main_layout.addWidget(interact_button, 1, 0)
  97         main_layout.addWidget(expand_button, 2, 0)
  98
  99         main_layout.addWidget(self.balance_label, 0, 1)
 100         main_layout.addWidget(copy_button, 0, 2)
 101
 102         main_layout.addLayout(address_layout, 1, 1, 1, -1)
 103
 104         main_layout.addLayout(amount_layout, 2, 1)
 105         main_layout.addWidget(send_button, 2, 2)
 106
 107         self.setWindowTitle("Electrum")
 108         self.setWindowFlags(Qt.Window|Qt.MSWindowsFixedSizeDialogHint)
 109         self.layout().setSizeConstraint(QLayout.SetFixedSize)
 110         self.setObjectName("main_window")
 111         self.show()
 112
 113     def closeEvent(self, event):
 114         super(MiniWindow, self).closeEvent(event)
 115         qApp.quit()
 116
 117     def activate(self):
 118         pass
 119
 120     def deactivate(self):
 121         pass
 122
 123     def set_balances(self, btc_balance, quote_balance, quote_currency):
 124         self.balance_label.set_balances( \
 125             btc_balance, quote_balance, quote_currency)
 126         self.amount_validator.setRange(0, btc_balance)
 127         main_account_info = \
 128             "Checking - %s BTC (%s %s)" % (btc_balance,
 129                                            quote_balance, quote_currency)
 130         self.setWindowTitle("Electrum - %s" % main_account_info)
 131         self.accounts_selector.clear()
 132         self.accounts_selector.addAction("%s" % main_account_info)
 133
 134     def send(self):
 135         self.actuator.send(self.address_input.text(),
 136                            self.amount_input.text(), self)
 137
 138     def address_field_changed(self, address):
 139         if self.actuator.is_valid(address):
 140             self.valid_address.setChecked(True)
 141         else:
 142             self.valid_address.setChecked(False)
 143
 144 class BalanceLabel(QLabel):
 145
 146     def __init__(self, parent=None):
 147         super(QLabel, self).__init__("Connecting...", parent)
 148
 149     def set_balances(self, btc_balance, quote_balance, quote_currency):
 150         label_text = "<span style='font-size: 16pt'>%s</span> <span style='font-size: 10pt'>BTC</span> <span style='font-size: 10pt'>(%s %s)</span>" % (btc_balance, quote_balance, quote_currency)
 151         self.setText(label_text)
 152
 153 class TextedLineEdit(QLineEdit):
 154
 155     def __init__(self, inactive_text, parent=None):
 156         super(QLineEdit, self).__init__(parent)
 157         self.inactive_text = inactive_text
 158         self.become_inactive()
 159
 160     def mousePressEvent(self, event):
 161         if self.isReadOnly():
 162             self.become_active()
 163         QLineEdit.mousePressEvent(self, event)
 164
 165     def focusOutEvent(self, event):
 166         if self.text() == "":
 167             self.become_inactive()
 168         QLineEdit.focusOutEvent(self, event)
 169
 170     def focusInEvent(self, event):
 171         if self.isReadOnly():
 172             self.become_active()
 173         QLineEdit.focusInEvent(self, event)
 174
 175     def become_inactive(self):
 176         self.setText(self.inactive_text)
 177         self.setReadOnly(True)
 178         self.recompute_style()
 179
 180     def become_active(self):
 181         self.setText("")
 182         self.setReadOnly(False)
 183         self.recompute_style()
 184
 185     def recompute_style(self):
 186         qApp.style().unpolish(self)
 187         qApp.style().polish(self)
 188         # also possible but more expensive:
 189         #qApp.setStyleSheet(qApp.styleSheet())
 190
 191 class MiniActuator:
 192
 193     def __init__(self, wallet):
 194         self.wallet = wallet
 195
 196     def copy_address(self):
 197         addrs = [addr for addr in self.wallet.all_addresses()
 198                  if not self.wallet.is_change(addr)]
 199         qApp.clipboard().setText(random.choice(addrs))
 200
 201     def send(self, address, amount, parent_window):
 202         recipient = unicode(address).strip()
 203
 204         # alias
 205         match1 = re.match(ALIAS_REGEXP, r)
 206         # label or alias, with address in brackets
 207         match2 = re.match('(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>', r)
 208
 209         if match1:
 210             dest_address = \
 211                 self.wallet.get_alias(recipient, True,
 212                                       self.show_message, self.question)
 213             if not dest_address:
 214                 return
 215         elif match2:
 216             dest_address = match2.group(2)
 217         else:
 218             dest_address = recipient
 219
 220         if not self.wallet.is_valid(dest_address):
 221             QMessageBox.warning(parent_window, _('Error'),
 222                 _('Invalid Bitcoin Address') + ':\n' + dest_address, _('OK'))
 223             return
 224
 225         convert_amount = lambda amount: \
 226             int(decimal.Decimal(unicode(amount)) * 100000000)
 227
 228         amount = convert_amount(amount)
 229
 230         if self.wallet.use_encryption:
 231             password = self.password_dialog()
 232             if not password:
 233                 return
 234         else:
 235             password = None
 236
 237         try:
 238             tx = self.wallet.mktx(dest_address, amount, "", password, fee)
 239         except BaseException, e:
 240             self.show_message(str(e))
 241             return
 242
 243         status, msg = self.wallet.sendtx( tx )
 244         if status:
 245             QMessageBox.information(self, '', _('Payment sent.')+'\n'+msg, _('OK'))
 246             self.do_clear()
 247             self.update_contacts_tab()
 248         else:
 249             QMessageBox.warning(self, _('Error'), msg, _('OK'))
 250
 251     def is_valid(self, address):
 252         return self.wallet.is_valid(address)
 253
 254 class MiniDriver(QObject):
 255
 256     INITIALIZING = 0
 257     CONNECTING = 1
 258     SYNCHRONIZING = 2
 259     READY = 3
 260
 261     def __init__(self, wallet, window):
 262         super(QObject, self).__init__()
 263
 264         self.wallet = wallet
 265         self.window = window
 266
 267         self.wallet.gui_callback = self.update_callback
 268
 269         self.state = None
 270
 271         self.initializing()
 272         self.connect(self, SIGNAL("updatesignal()"), self.update)
 273
 274     # This is a hack to workaround that Qt does not like changing the
 275     # window properties from this other thread before the runloop has
 276     # been called from.
 277     def update_callback(self):
 278         self.emit(SIGNAL("updatesignal()"))
 279
 280     def update(self):
 281         if not self.wallet.interface:
 282             self.initializing()
 283         elif not self.wallet.interface.is_connected:
 284             self.connecting()
 285         elif not self.wallet.blocks == -1:
 286             self.connecting()
 287         elif not self.wallet.is_up_to_date:
 288             self.synchronizing()
 289         else:
 290             self.ready()
 291
 292         if self.wallet.up_to_date:
 293             self.update_balance()
 294
 295     def initializing(self):
 296         if self.state == self.INITIALIZING:
 297             return
 298         self.state = self.INITIALIZING
 299         self.window.deactivate()
 300
 301     def connecting(self):
 302         if self.state == self.CONNECTING:
 303             return
 304         self.state = self.CONNECTING
 305         self.window.deactivate()
 306
 307     def synchronizing(self):
 308         if self.state == self.SYNCHRONIZING:
 309             return
 310         self.state = self.SYNCHRONIZING
 311         self.window.deactivate()
 312
 313     def ready(self):
 314         if self.state == self.READY:
 315             return
 316         self.state = self.READY
 317         self.window.activate()
 318
 319     def update_balance(self):
 320         conf_balance, unconf_balance = self.wallet.get_balance()
 321         balance = conf_balance if unconf_balance is None else unconf_balance
 322         self.window.set_balances(balance, balance * 6, 'EUR')
 323
 324 if __name__ == "__main__":
 325     app = QApplication(sys.argv)
 326     with open("data/style.css") as style_file:
 327         app.setStyleSheet(style_file.read())
 328     mini = MiniWindow()
 329     sys.exit(app.exec_())
 330