separate AmountEdit and BTCAmountEdit classes, for exchange rate plugin
[electrum-nvc.git] / gui / qt / main_window.py
index df4bd54..9aa8dfb 100644 (file)
@@ -44,7 +44,7 @@ from electrum import SimpleConfig, Wallet, WalletStorage
 
 from electrum import bmp, pyqrnative
 
-from amountedit import AmountEdit
+from amountedit import BTCAmountEdit, MyLineEdit
 from network_dialog import NetworkDialog
 from qrcodewidget import QRCodeWidget
 
@@ -99,51 +99,25 @@ class StatusBarButton(QPushButton):
 default_column_widths = { "history":[40,140,350,140], "contacts":[350,330], "receive": [370,200,130] }
 
 class ElectrumWindow(QMainWindow):
-    def build_menu(self):
-        m = QMenu()
-        m.addAction(_("Show/Hide"), self.show_or_hide)
-        m.addSeparator()
-        m.addAction(_("Exit Electrum"), self.close)
-        self.tray.setContextMenu(m)
-
-    def show_or_hide(self):
-        self.tray_activated(QSystemTrayIcon.DoubleClick)
-
-    def tray_activated(self, reason):
-        if reason == QSystemTrayIcon.DoubleClick:
-            if self.isMinimized() or self.isHidden():
-                self.show()
-                self.raise_()
-            else:
-                self.hide()
 
-    def __init__(self, config, network):
+
+
+    def __init__(self, config, network, gui_object):
         QMainWindow.__init__(self)
 
         self.config = config
         self.network = network
-
-        self._close_electrum = False
+        self.gui_object = gui_object
+        self.tray = gui_object.tray
+        self.go_lite = gui_object.go_lite
         self.lite = None
 
-        if sys.platform == 'darwin':
-          self.icon = QIcon(":icons/electrum_dark_icon.png")
-          #self.icon = QIcon(":icons/lock.png")
-        else:
-          self.icon = QIcon(':icons/electrum_light_icon.png')
-
-        self.tray = QSystemTrayIcon(self.icon, self)
-        self.tray.setToolTip('Electrum')
-        self.tray.activated.connect(self.tray_activated)
-
-        self.build_menu()
-        self.tray.show()
         self.create_status_bar()
-
         self.need_update = threading.Event()
 
         self.decimal_point = config.get('decimal_point', 5)
         self.num_zeros     = int(config.get('num_zeros',0))
+        self.invoices      = {}
 
         set_language(config.get('language'))
 
@@ -156,6 +130,7 @@ class ElectrumWindow(QMainWindow):
         tabs.addTab(self.create_send_tab(), _('Send') )
         tabs.addTab(self.create_receive_tab(), _('Receive') )
         tabs.addTab(self.create_contacts_tab(), _('Contacts') )
+        tabs.addTab(self.create_invoices_tab(), _('Invoices') )
         tabs.addTab(self.create_console_tab(), _('Console') )
         tabs.setMinimumSize(600, 400)
         tabs.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
@@ -163,6 +138,8 @@ class ElectrumWindow(QMainWindow):
 
         g = self.config.get("winpos-qt",[100, 100, 840, 400])
         self.setGeometry(g[0], g[1], g[2], g[3])
+        if self.config.get("is_maximized"):
+            self.showMaximized()
 
         self.setWindowIcon(QIcon(":icons/electrum.png"))
         self.init_menubar()
@@ -179,8 +156,8 @@ class ElectrumWindow(QMainWindow):
         self.connect(self, QtCore.SIGNAL('update_status'), self.update_status)
         self.connect(self, QtCore.SIGNAL('banner_signal'), lambda: self.console.showMessage(self.network.banner) )
         self.connect(self, QtCore.SIGNAL('transaction_signal'), lambda: self.notify_transactions() )
-        self.connect(self, QtCore.SIGNAL('send_tx2'), self.send_tx2)
-        self.connect(self, QtCore.SIGNAL('send_tx3'), self.send_tx3)
+        self.connect(self, QtCore.SIGNAL('payment_request_ok'), self.payment_request_ok)
+        self.connect(self, QtCore.SIGNAL('payment_request_error'), self.payment_request_error)
 
         self.history_list.setFocus(True)
 
@@ -196,52 +173,6 @@ class ElectrumWindow(QMainWindow):
             self.console.showMessage(self.network.banner)
 
         self.wallet = None
-        self.init_lite()
-
-
-    def go_full(self):
-        self.config.set_key('lite_mode', False, True)
-        self.mini.hide()
-        self.show()
-        self.raise_()
-
-    def go_lite(self):
-        self.config.set_key('lite_mode', True, True)
-        self.hide()
-        self.mini.show()
-        self.mini.raise_()
-
-
-    def init_lite(self):
-        import lite_window
-        if not self.check_qt_version():
-            if self.config.get('lite_mode') is True:
-                msg = "Electrum was unable to load the 'Lite GUI' because it needs Qt version >= 4.7.\nChanging your config to use the 'Classic' GUI"
-                QMessageBox.warning(None, "Could not start Lite GUI.", msg)
-                self.config.set_key('lite_mode', False, True)
-                sys.exit(0)
-            self.mini = None
-            self.show()
-            self.raise_()
-            return
-
-        actuator = lite_window.MiniActuator(self)
-
-        actuator.load_theme()
-
-        self.mini = lite_window.MiniWindow(actuator, self.go_full, self.config)
-
-        driver = lite_window.MiniDriver(self, self.mini)
-
-        if self.config.get('lite_mode') is True:
-            self.go_lite()
-        else:
-            self.go_full()
-
-
-    def check_qt_version(self):
-        qtVersion = qVersion()
-        return int(qtVersion[0]) >= 4 and int(qtVersion[2]) >= 7
 
 
     def update_account_selector(self):
@@ -258,10 +189,13 @@ class ElectrumWindow(QMainWindow):
 
     def load_wallet(self, wallet):
         import electrum
+
         self.wallet = wallet
+        self.update_wallet_format()
+
+        self.invoices = self.wallet.storage.get('invoices', {})
         self.accounts_expanded = self.wallet.storage.get('accounts_expanded',{})
         self.current_account = self.wallet.storage.get("current_account", None)
-
         title = 'Electrum ' + self.wallet.electrum_version + '  -  ' + self.wallet.storage.path
         if self.wallet.is_watching_only(): title += ' [%s]' % (_('watching only'))
         self.setWindowTitle( title )
@@ -269,7 +203,14 @@ class ElectrumWindow(QMainWindow):
         # Once GUI has been initialized check if we want to announce something since the callback has been called before the GUI was initialized
         self.notify_transactions()
         self.update_account_selector()
-        self.new_account.setEnabled(self.wallet.seed_version>4)
+        # update menus
+        self.new_account_menu.setEnabled(self.wallet.can_create_accounts())
+        self.private_keys_menu.setEnabled(not self.wallet.is_watching_only())
+        self.password_menu.setEnabled(not self.wallet.is_watching_only())
+        self.seed_menu.setEnabled(self.wallet.has_seed())
+        self.mpk_menu.setEnabled(self.wallet.is_deterministic())
+        self.import_menu.setEnabled(self.wallet.can_import())
+
         self.update_lock_icon()
         self.update_buttons_on_seed()
         self.update_console()
@@ -277,6 +218,16 @@ class ElectrumWindow(QMainWindow):
         run_hook('load_wallet', wallet)
 
 
+    def update_wallet_format(self):
+        # convert old-format imported keys
+        if self.wallet.imported_keys:
+            password = self.password_dialog(_("Please enter your password in order to update imported keys"))
+            try:
+                self.wallet.convert_imported_keys(password)
+            except:
+                self.show_message("error")
+
+
     def open_wallet(self):
         wallet_folder = self.wallet.storage.path
         filename = unicode( QFileDialog.getOpenFileName(self, "Select your wallet file", wallet_folder) )
@@ -330,7 +281,7 @@ class ElectrumWindow(QMainWindow):
             return
 
         wizard = installwizard.InstallWizard(self.config, self.network, storage)
-        wallet = wizard.run()
+        wallet = wizard.run('new')
         if wallet:
             self.load_wallet(wallet)
 
@@ -347,24 +298,24 @@ class ElectrumWindow(QMainWindow):
 
         wallet_menu = menubar.addMenu(_("&Wallet"))
         wallet_menu.addAction(_("&New contact"), self.new_contact_dialog)
-        self.new_account = wallet_menu.addAction(_("&New account"), self.new_account_dialog)
+        self.new_account_menu = wallet_menu.addAction(_("&New account"), self.new_account_dialog)
 
         wallet_menu.addSeparator()
 
-        wallet_menu.addAction(_("&Password"), self.change_password_dialog)
-        wallet_menu.addAction(_("&Seed"), self.show_seed_dialog)
-        wallet_menu.addAction(_("&Master Public Key"), self.show_master_public_key)
+        self.password_menu = wallet_menu.addAction(_("&Password"), self.change_password_dialog)
+        self.seed_menu = wallet_menu.addAction(_("&Seed"), self.show_seed_dialog)
+        self.mpk_menu = wallet_menu.addAction(_("&Master Public Keys"), self.show_master_public_keys)
 
         wallet_menu.addSeparator()
         labels_menu = wallet_menu.addMenu(_("&Labels"))
         labels_menu.addAction(_("&Import"), self.do_import_labels)
         labels_menu.addAction(_("&Export"), self.do_export_labels)
 
-        keys_menu = wallet_menu.addMenu(_("&Private keys"))
-        keys_menu.addAction(_("&Import"), self.do_import_privkey)
-        keys_menu.addAction(_("&Export"), self.do_export_privkeys)
-
-        wallet_menu.addAction(_("&Export History"), self.do_export_history)
+        self.private_keys_menu = wallet_menu.addMenu(_("&Private keys"))
+        self.private_keys_menu.addAction(_("&Sweep"), self.sweep_key_dialog)
+        self.import_menu = self.private_keys_menu.addAction(_("&Import"), self.do_import_privkey)
+        self.private_keys_menu.addAction(_("&Export"), self.export_privkeys_dialog)
+        wallet_menu.addAction(_("&Export History"), self.export_history_dialog)
 
         tools_menu = menubar.addMenu(_("&Tools"))
 
@@ -438,14 +389,14 @@ class ElectrumWindow(QMainWindow):
 
     # custom wrappers for getOpenFileName and getSaveFileName, that remember the path selected by the user
     def getOpenFileName(self, title, filter = ""):
-        directory = self.config.get('io_dir', os.path.expanduser('~'))
+        directory = self.config.get('io_dir', unicode(os.path.expanduser('~')))
         fileName = unicode( QFileDialog.getOpenFileName(self, title, directory, filter) )
         if fileName and directory != os.path.dirname(fileName):
             self.config.set_key('io_dir', os.path.dirname(fileName), True)
         return fileName
 
     def getSaveFileName(self, title, filename, filter = ""):
-        directory = self.config.get('io_dir', os.path.expanduser('~'))
+        directory = self.config.get('io_dir', unicode(os.path.expanduser('~')))
         path = os.path.join( directory, filename )
         fileName = unicode( QFileDialog.getSaveFileName(self, title, path, filter) )
         if fileName and directory != os.path.dirname(fileName):
@@ -469,10 +420,10 @@ class ElectrumWindow(QMainWindow):
     def format_amount(self, x, is_diff=False, whitespaces=False):
         return format_satoshis(x, is_diff, self.num_zeros, self.decimal_point, whitespaces)
 
-    def read_amount(self, x):
-        if x in['.', '']: return None
-        p = pow(10, self.decimal_point)
-        return int( p * Decimal(x) )
+
+    def get_decimal_point(self):
+        return self.decimal_point
+
 
     def base_unit(self):
         assert self.decimal_point in [5,8]
@@ -520,6 +471,7 @@ class ElectrumWindow(QMainWindow):
             self.update_receive_tab()
             self.update_contacts_tab()
             self.update_completions()
+            self.update_invoices_tab()
 
 
     def create_history_tab(self):
@@ -538,6 +490,13 @@ class ElectrumWindow(QMainWindow):
     def create_history_menu(self, position):
         self.history_list.selectedIndexes()
         item = self.history_list.currentItem()
+        be = self.config.get('block_explorer', 'Blockchain.info')
+        if be == 'Blockchain.info':
+            block_explorer = 'https://blockchain.info/tx/'
+        elif be == 'Blockr.io':
+            block_explorer = 'https://blockr.io/tx/info/'
+        elif be == 'Insight.is':
+            block_explorer = 'http://live.insight.is/tx/'
         if not item: return
         tx_hash = str(item.data(0, Qt.UserRole).toString())
         if not tx_hash: return
@@ -545,7 +504,7 @@ class ElectrumWindow(QMainWindow):
         menu.addAction(_("Copy ID to Clipboard"), lambda: self.app.clipboard().setText(tx_hash))
         menu.addAction(_("Details"), lambda: self.show_transaction(self.wallet.transactions.get(tx_hash)))
         menu.addAction(_("Edit description"), lambda: self.tx_label_clicked(item,2))
-        menu.addAction(_("View on Blockchain.info"), lambda: webbrowser.open("https://blockchain.info/tx/" + tx_hash))
+        menu.addAction(_("View on block explorer"), lambda: webbrowser.open(block_explorer + tx_hash))
         menu.exec_(self.contacts_list.viewport().mapToGlobal(position))
 
 
@@ -682,48 +641,52 @@ class ElectrumWindow(QMainWindow):
     def create_send_tab(self):
         w = QWidget()
 
-        grid = QGridLayout()
+        grid = QGridLayout(w)
         grid.setSpacing(8)
         grid.setColumnMinimumWidth(3,300)
         grid.setColumnStretch(5,1)
+        grid.setRowStretch(8, 1)
 
-
-        self.payto_e = QLineEdit()
+        from paytoedit import PayToEdit
+        self.amount_e = BTCAmountEdit(self.get_decimal_point)
+        self.payto_e = PayToEdit(self.amount_e)
+        self.payto_help = HelpButton(_('Recipient of the funds.') + '\n\n' + _('You may enter a Bitcoin address, a label from your list of contacts (a list of completions will be proposed), or an alias (email-like address that forwards to a Bitcoin address)'))
         grid.addWidget(QLabel(_('Pay to')), 1, 0)
         grid.addWidget(self.payto_e, 1, 1, 1, 3)
-
-        grid.addWidget(HelpButton(_('Recipient of the funds.') + '\n\n' + _('You may enter a Bitcoin address, a label from your list of contacts (a list of completions will be proposed), or an alias (email-like address that forwards to a Bitcoin address)')), 1, 4)
+        grid.addWidget(self.payto_help, 1, 4)
 
         completer = QCompleter()
         completer.setCaseSensitivity(False)
         self.payto_e.setCompleter(completer)
         completer.setModel(self.completions)
 
-        self.message_e = QLineEdit()
+        self.message_e = MyLineEdit()
+        self.message_help = HelpButton(_('Description of the transaction (not mandatory).') + '\n\n' + _('The description is not sent to the recipient of the funds. It is stored in your wallet file, and displayed in the \'History\' tab.'))
         grid.addWidget(QLabel(_('Description')), 2, 0)
         grid.addWidget(self.message_e, 2, 1, 1, 3)
-        grid.addWidget(HelpButton(_('Description of the transaction (not mandatory).') + '\n\n' + _('The description is not sent to the recipient of the funds. It is stored in your wallet file, and displayed in the \'History\' tab.')), 2, 4)
+        grid.addWidget(self.message_help, 2, 4)
 
         self.from_label = QLabel(_('From'))
         grid.addWidget(self.from_label, 3, 0)
-        self.from_list = QTreeWidget(self)
+        self.from_list = MyTreeWidget(self)
         self.from_list.setColumnCount(2)
         self.from_list.setColumnWidth(0, 350)
         self.from_list.setColumnWidth(1, 50)
-        self.from_list.setHeaderHidden (True)
+        self.from_list.setHeaderHidden(True)
         self.from_list.setMaximumHeight(80)
+        self.from_list.setContextMenuPolicy(Qt.CustomContextMenu)
+        self.from_list.customContextMenuRequested.connect(self.from_list_menu)
         grid.addWidget(self.from_list, 3, 1, 1, 3)
         self.set_pay_from([])
 
-        self.amount_e = AmountEdit(self.base_unit)
+        self.amount_help = HelpButton(_('Amount to be sent.') + '\n\n' \
+                                      + _('The amount will be displayed in red if you do not have enough funds in your wallet. Note that if you have frozen some of your addresses, the available funds will be lower than your total balance.') \
+                                      + '\n\n' + _('Keyboard shortcut: type "!" to send all your coins.'))
         grid.addWidget(QLabel(_('Amount')), 4, 0)
         grid.addWidget(self.amount_e, 4, 1, 1, 2)
-        grid.addWidget(HelpButton(
-                _('Amount to be sent.') + '\n\n' \
-                    + _('The amount will be displayed in red if you do not have enough funds in your wallet. Note that if you have frozen some of your addresses, the available funds will be lower than your total balance.') \
-                    + '\n\n' + _('Keyboard shortcut: type "!" to send all your coins.')), 4, 3)
+        grid.addWidget(self.amount_help, 4, 3)
 
-        self.fee_e = AmountEdit(self.base_unit)
+        self.fee_e = BTCAmountEdit(self.get_decimal_point)
         grid.addWidget(QLabel(_('Fee')), 5, 0)
         grid.addWidget(self.fee_e, 5, 1, 1, 2)
         grid.addWidget(HelpButton(
@@ -736,22 +699,16 @@ class ElectrumWindow(QMainWindow):
         self.send_button = EnterButton(_("Send"), self.do_send)
         grid.addWidget(self.send_button, 6, 1)
 
-        b = EnterButton(_("Clear"),self.do_clear)
+        b = EnterButton(_("Clear"), self.do_clear)
         grid.addWidget(b, 6, 2)
 
         self.payto_sig = QLabel('')
         grid.addWidget(self.payto_sig, 7, 0, 1, 4)
 
-        QShortcut(QKeySequence("Up"), w, w.focusPreviousChild)
-        QShortcut(QKeySequence("Down"), w, w.focusNextChild)
+        #QShortcut(QKeySequence("Up"), w, w.focusPreviousChild)
+        #QShortcut(QKeySequence("Down"), w, w.focusNextChild)
         w.setLayout(grid)
 
-        w2 = QWidget()
-        vbox = QVBoxLayout()
-        vbox.addWidget(w)
-        vbox.addStretch(1)
-        w2.setLayout(vbox)
-
         def entry_changed( is_fee ):
             self.funds_error = False
 
@@ -759,21 +716,21 @@ class ElectrumWindow(QMainWindow):
                 self.amount_e.is_shortcut = False
                 sendable = self.get_sendable_balance()
                 # there is only one output because we are completely spending inputs
-                inputs, total, fee = self.wallet.choose_tx_inputs( sendable, 0, 1, self.get_payment_sources())
+                inputs, total, fee = self.wallet.choose_tx_inputs( sendable, 0, 1, coins = self.get_coins())
                 fee = self.wallet.estimated_fee(inputs, 1)
                 amount = total - fee
                 self.amount_e.setText( self.format_amount(amount) )
                 self.fee_e.setText( self.format_amount( fee ) )
                 return
 
-            amount = self.read_amount(str(self.amount_e.text()))
-            fee = self.read_amount(str(self.fee_e.text()))
+            amount = self.amount_e.get_amount()
+            fee = self.fee_e.get_amount()
 
             if not is_fee: fee = None
             if amount is None:
                 return
             # assume that there will be 2 outputs (one for change)
-            inputs, total, fee = self.wallet.choose_tx_inputs(amount, fee, 2, self.get_payment_sources())
+            inputs, total, fee = self.wallet.choose_tx_inputs(amount, fee, 2, coins = self.get_coins())
             if not is_fee:
                 self.fee_e.setText( self.format_amount( fee ) )
             if inputs:
@@ -796,19 +753,34 @@ class ElectrumWindow(QMainWindow):
         self.fee_e.textChanged.connect(lambda: entry_changed(True) )
 
         run_hook('create_send_tab', grid)
-        return w2
+        return w
+
+    def from_list_delete(self, item):
+        i = self.from_list.indexOfTopLevelItem(item)
+        self.pay_from.pop(i)
+        self.redraw_from_list()
+
+    def from_list_menu(self, position):
+        item = self.from_list.itemAt(position)
+        menu = QMenu()
+        menu.addAction(_("Remove"), lambda: self.from_list_delete(item))
+        menu.exec_(self.from_list.viewport().mapToGlobal(position))
 
+    def set_pay_from(self, domain = None):
+        self.pay_from = [] if domain == [] else self.wallet.get_unspent_coins(domain)
+        self.redraw_from_list()
 
-    def set_pay_from(self, l):
-        self.pay_from = l
+    def redraw_from_list(self):
         self.from_list.clear()
         self.from_label.setHidden(len(self.pay_from) == 0)
         self.from_list.setHidden(len(self.pay_from) == 0)
-        for addr in self.pay_from:
-            c, u = self.wallet.get_addr_balance(addr)
-            balance = self.format_amount(c + u)
-            self.from_list.addTopLevelItem(QTreeWidgetItem( [addr, balance] ))
 
+        def format(x):
+            h = x.get('prevout_hash')
+            return h[0:8] + '...' + h[-8:] + ":%d"%x.get('prevout_n') + u'\t' + "%s"%x.get('address')
+
+        for item in self.pay_from:
+            self.from_list.addTopLevelItem(QTreeWidgetItem( [format(item), self.format_amount(item['value']) ]))
 
     def update_completions(self):
         l = []
@@ -825,33 +797,37 @@ class ElectrumWindow(QMainWindow):
 
 
     def do_send(self):
-
         label = unicode( self.message_e.text() )
-        r = unicode( self.payto_e.text() )
-        r = r.strip()
 
-        # label or alias, with address in brackets
-        m = re.match('(.*?)\s*\<([1-9A-HJ-NP-Za-km-z]{26,})\>', r)
-        to_address = m.group(2) if m else r
+        if self.gui_object.payment_request:
+            outputs = self.gui_object.payment_request.outputs
+        else:
+            outputs = self.payto_e.get_outputs()
 
-        if not is_valid(to_address):
-            QMessageBox.warning(self, _('Error'), _('Invalid Bitcoin Address') + ':\n' + to_address, _('OK'))
+        if not outputs:
+            QMessageBox.warning(self, _('Error'), _('No outputs'), _('OK'))
             return
 
+        for addr, x in outputs:
+            if addr is None or not bitcoin.is_address(addr):
+                QMessageBox.warning(self, _('Error'), _('Invalid Bitcoin Address'), _('OK'))
+                return
+            if x is None:
+                QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
+                return
+
+        amount = sum(map(lambda x:x[1], outputs))
+
         try:
-            amount = self.read_amount(unicode( self.amount_e.text()))
-        except Exception:
-            QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
-            return
-        try:
-            fee = self.read_amount(unicode( self.fee_e.text()))
+            fee = self.fee_e.get_amount()
         except Exception:
             QMessageBox.warning(self, _('Error'), _('Invalid Fee'), _('OK'))
             return
 
         confirm_amount = self.config.get('confirm_amount', 100000000)
         if amount >= confirm_amount:
-            if not self.question(_("send %(amount)s to %(address)s?")%{ 'amount' : self.format_amount(amount) + ' '+ self.base_unit(), 'address' : to_address}):
+            o = '\n'.join(map(lambda x:x[0], outputs))
+            if not self.question(_("send %(amount)s to %(address)s?")%{ 'amount' : self.format_amount(amount) + ' '+ self.base_unit(), 'address' : o}):
                 return
             
         confirm_fee = self.config.get('confirm_fee', 100000)
@@ -859,31 +835,23 @@ class ElectrumWindow(QMainWindow):
             if not self.question(_("The fee for this transaction seems unusually high.\nAre you really sure you want to pay %(fee)s in fees?")%{ 'fee' : self.format_amount(fee) + ' '+ self.base_unit()}):
                 return
 
-        self.send_tx(to_address, amount, fee, label)
+        self.send_tx(outputs, fee, label)
 
 
-    def waiting_dialog(self, message):
-        d = QDialog(self)
-        d.setWindowTitle('Please wait')
-        l = QLabel(message)
-        vbox = QVBoxLayout(d)
-        vbox.addWidget(l)
-        d.show()
-        return d
-
 
     @protected
-    def send_tx(self, to_address, amount, fee, label, password):
+    def send_tx(self, outputs, fee, label, password):
+        self.send_button.setDisabled(True)
 
         # first, create an unsigned tx 
-        domain = self.get_payment_sources()
-        outputs = [(to_address, amount)]
+        coins = self.get_coins()
         try:
-            tx = self.wallet.make_unsigned_transaction(outputs, fee, None, domain)
+            tx = self.wallet.make_unsigned_transaction(outputs, fee, None, coins = coins)
             tx.error = None
         except Exception as e:
             traceback.print_exc(file=sys.stdout)
             self.show_message(str(e))
+            self.send_button.setDisabled(False)
             return
 
         # call hook to see if plugin needs gui interaction
@@ -895,74 +863,89 @@ class ElectrumWindow(QMainWindow):
             keypairs = {}
             self.wallet.add_keypairs_from_wallet(tx, keypairs, password)
             self.wallet.sign_transaction(tx, keypairs, password)
-            self.signed_tx_data = (tx, fee, label)
-            self.emit(SIGNAL('send_tx2'))
-        self.tx_wait_dialog = self.waiting_dialog('Signing..')
-        threading.Thread(target=sign_thread).start()
-
-        # add recipient to addressbook
-        if to_address not in self.wallet.addressbook and not self.wallet.is_mine(to_address):
-            self.wallet.addressbook.append(to_address)
-
-
-    def send_tx2(self):
-        tx, fee, label = self.signed_tx_data
-        self.tx_wait_dialog.accept()
-        
-        if tx.error:
-            self.show_message(tx.error)
-            return
+            return tx, fee, label
 
-        if tx.requires_fee(self.wallet.verifier) and fee < MIN_RELAY_TX_FEE:
-            QMessageBox.warning(self, _('Error'), _("This transaction requires a higher fee, or it will not be propagated by the network."), _('OK'))
-            return
+        def sign_done(tx, fee, label):
+            if tx.error:
+                self.show_message(tx.error)
+                self.send_button.setDisabled(False)
+                return
+            if tx.requires_fee(self.wallet.verifier) and fee < MIN_RELAY_TX_FEE:
+                QMessageBox.warning(self, _('Error'), _("This transaction requires a higher fee, or it will not be propagated by the network."), _('OK'))
+                self.send_button.setDisabled(False)
+                return
+            if label:
+                self.wallet.set_label(tx.hash(), label)
 
-        if label:
-            self.wallet.set_label(tx.hash(), label)
+            if not tx.is_complete() or self.config.get('show_before_broadcast'):
+                self.show_transaction(tx)
+                self.do_clear()
+                self.send_button.setDisabled(False)
+                return
 
-        if not tx.is_complete():
-            self.show_transaction(tx)
-            return
+            self.broadcast_transaction(tx)
 
-        # broadcast the tx
-        def broadcast_thread():
-            self.tx_broadcast_result =  self.wallet.sendtx(tx)
-            self.emit(SIGNAL('send_tx3'))
-        self.tx_broadcast_dialog = self.waiting_dialog('Broadcasting..')
-        threading.Thread(target=broadcast_thread).start()
-
-
-    def send_tx3(self):
-        self.tx_broadcast_dialog.accept()
-        status, msg = self.tx_broadcast_result
-        if status:
-            QMessageBox.information(self, '', _('Payment sent.') + '\n' + msg, _('OK'))
-            self.do_clear()
-            self.update_contacts_tab()
-        else:
-            QMessageBox.warning(self, _('Error'), msg, _('OK'))
+        self.waiting_dialog = WaitingDialog(self, 'Signing..', sign_thread, sign_done)
+        self.waiting_dialog.start()
 
 
 
+    def broadcast_transaction(self, tx):
 
+        def broadcast_thread():
+            if self.gui_object.payment_request:
+                refund_address = self.wallet.addresses()[0]
+                status, msg = self.gui_object.payment_request.send_ack(str(tx), refund_address)
+                self.gui_object.payment_request = None
+            else:
+                status, msg =  self.wallet.sendtx(tx)
+            return status, msg
 
+        def broadcast_done(status, msg):
+            if status:
+                QMessageBox.information(self, '', _('Payment sent.') + '\n' + msg, _('OK'))
+                self.do_clear()
+            else:
+                QMessageBox.warning(self, _('Error'), msg, _('OK'))
+            self.send_button.setDisabled(False)
 
-    def set_url(self, url):
-        try:
-            address, amount, label, message, signature, identity, url = util.parse_url(url)
-        except Exception:
-            QMessageBox.warning(self, _('Error'), _('Invalid bitcoin URL'), _('OK'))
-            return
+        self.waiting_dialog = WaitingDialog(self, 'Broadcasting..', broadcast_thread, broadcast_done)
+        self.waiting_dialog.start()
 
-        try:
-            if amount and self.base_unit() == 'mBTC': amount = str( 1000* Decimal(amount))
-            elif amount: amount = str(Decimal(amount))
-        except Exception:
-            amount = "0.0"
-            QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
 
-        if self.mini:
-            self.mini.set_payment_fields(address, amount)
+
+    def prepare_for_payment_request(self):
+        self.tabs.setCurrentIndex(1)
+        self.payto_e.is_pr = True
+        for e in [self.payto_e, self.amount_e, self.message_e]:
+            e.setFrozen(True)
+        for h in [self.payto_help, self.amount_help, self.message_help]:
+            h.hide()
+        self.payto_e.setText(_("please wait..."))
+        return True
+
+    def payment_request_ok(self):
+        pr = self.gui_object.payment_request
+        pr_id = pr.get_id()
+        # save it
+        self.invoices[pr_id] = (pr.get_domain(), pr.get_amount())
+        self.wallet.storage.put('invoices', self.invoices)
+        self.update_invoices_tab()
+
+        self.payto_help.show()
+        self.payto_help.set_alt(lambda: self.show_pr_details(pr))
+
+        self.payto_e.setGreen()
+        self.payto_e.setText(pr.domain)
+        self.amount_e.setText(self.format_amount(pr.get_amount()))
+        self.message_e.setText(pr.memo)
+
+    def payment_request_error(self):
+        self.do_clear()
+        self.show_message(self.gui_object.payment_request.error)
+        self.gui_object.payment_request = None
+
+    def set_send(self, address, amount, label, message):
 
         if label and self.wallet.labels.get(address) != label:
             if self.question('Give label "%s" to address %s ?'%(label,address)):
@@ -970,8 +953,6 @@ class ElectrumWindow(QMainWindow):
                     self.wallet.addressbook.append(address)
                 self.wallet.set_label(address, label)
 
-        run_hook('set_url', url, self.show_message, self.question)
-
         self.tabs.setCurrentIndex(1)
         label = self.wallet.labels.get(address)
         m_addr = label + '  <'+ address +'>' if label else address
@@ -981,36 +962,21 @@ class ElectrumWindow(QMainWindow):
         if amount:
             self.amount_e.setText(amount)
 
-        if identity:
-            self.set_frozen(self.payto_e,True)
-            self.set_frozen(self.amount_e,True)
-            self.set_frozen(self.message_e,True)
-            self.payto_sig.setText( '      '+_('The bitcoin URI was signed by')+' ' + identity )
-        else:
-            self.payto_sig.setVisible(False)
 
     def do_clear(self):
+        self.payto_e.is_pr = False
         self.payto_sig.setVisible(False)
         for e in [self.payto_e, self.message_e, self.amount_e, self.fee_e]:
             e.setText('')
-            self.set_frozen(e,False)
+            e.setFrozen(False)
 
+        for h in [self.payto_help, self.amount_help, self.message_help]:
+            h.show()
+
+        self.payto_help.set_alt(None)
         self.set_pay_from([])
         self.update_status()
 
-    def set_frozen(self,entry,frozen):
-        if frozen:
-            entry.setReadOnly(True)
-            entry.setFrame(False)
-            palette = QPalette()
-            palette.setColor(entry.backgroundRole(), QColor('lightgray'))
-            entry.setPalette(palette)
-        else:
-            entry.setReadOnly(False)
-            entry.setFrame(True)
-            palette = QPalette()
-            palette.setColor(entry.backgroundRole(), QColor('white'))
-            entry.setPalette(palette)
 
 
     def set_addrs_frozen(self,addrs,freeze):
@@ -1040,16 +1006,11 @@ class ElectrumWindow(QMainWindow):
         buttons = QWidget()
         vbox.addWidget(buttons)
 
-        hbox = QHBoxLayout()
-        hbox.setMargin(0)
-        hbox.setSpacing(0)
-        buttons.setLayout(hbox)
-
-        return l,w,hbox
+        return l, w
 
 
     def create_receive_tab(self):
-        l,w,hbox = self.create_list_tab([ _('Address'), _('Label'), _('Balance'), _('Tx')])
+        l, w = self.create_list_tab([ _('Address'), _('Label'), _('Balance'), _('Tx')])
         l.setContextMenuPolicy(Qt.CustomContextMenu)
         l.customContextMenuRequested.connect(self.create_receive_menu)
         l.setSelectionMode(QAbstractItemView.ExtendedSelection)
@@ -1057,8 +1018,6 @@ class ElectrumWindow(QMainWindow):
         self.connect(l, SIGNAL('itemChanged(QTreeWidgetItem*, int)'), lambda a,b: self.address_label_changed(a,b,l,0,1))
         self.connect(l, SIGNAL('currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)'), lambda a,b: self.current_item_changed(a))
         self.receive_list = l
-        self.receive_buttons_hbox = hbox
-        hbox.addStretch(1)
         return w
 
 
@@ -1081,7 +1040,7 @@ class ElectrumWindow(QMainWindow):
 
 
     def create_contacts_tab(self):
-        l,w,hbox = self.create_list_tab([_('Address'), _('Label'), _('Tx')])
+        l, w = self.create_list_tab([_('Address'), _('Label'), _('Tx')])
         l.setContextMenuPolicy(Qt.CustomContextMenu)
         l.customContextMenuRequested.connect(self.create_contact_menu)
         for i,width in enumerate(self.column_widths['contacts']):
@@ -1090,11 +1049,30 @@ class ElectrumWindow(QMainWindow):
         self.connect(l, SIGNAL('itemDoubleClicked(QTreeWidgetItem*, int)'), lambda a, b: self.address_label_clicked(a,b,l,0,1))
         self.connect(l, SIGNAL('itemChanged(QTreeWidgetItem*, int)'), lambda a,b: self.address_label_changed(a,b,l,0,1))
         self.contacts_list = l
-        self.contacts_buttons_hbox = hbox
-        hbox.addStretch(1)
         return w
 
 
+    def create_invoices_tab(self):
+        l, w = self.create_list_tab([_('Requestor'), _('Amount'), _('Status')])
+        l.setContextMenuPolicy(Qt.CustomContextMenu)
+        l.customContextMenuRequested.connect(self.create_invoice_menu)
+        self.invoices_list = l
+        return w
+
+    def update_invoices_tab(self):
+        invoices = self.wallet.storage.get('invoices', {})
+        l = self.invoices_list
+        l.clear()
+
+        for item, value in invoices.items():
+            domain, amount = value
+            item = QTreeWidgetItem( [ domain, self.format_amount(amount), ""] )
+            l.addTopLevelItem(item)
+
+        l.setCurrentItem(l.topLevelItem(0))
+
+
+
     def delete_imported_key(self, addr):
         if self.question(_("Do you want to remove")+" %s "%addr +_("from your wallet?")):
             self.wallet.delete_imported_key(addr)
@@ -1156,11 +1134,11 @@ class ElectrumWindow(QMainWindow):
             menu.addAction(_("QR code"), lambda: self.show_qrcode("bitcoin:" + addr, _("Address")) )
             menu.addAction(_("Edit label"), lambda: self.edit_label(True))
             menu.addAction(_("Public keys"), lambda: self.show_public_keys(addr))
-            if self.wallet.seed:
+            if not self.wallet.is_watching_only():
                 menu.addAction(_("Private key"), lambda: self.show_private_key(addr))
                 menu.addAction(_("Sign/verify message"), lambda: self.sign_verify_message(addr))
                 #menu.addAction(_("Encrypt/decrypt message"), lambda: self.encrypt_message(addr))
-            if addr in self.wallet.imported_keys:
+            if self.wallet.is_imported(addr):
                 menu.addAction(_("Remove from wallet"), lambda: self.delete_imported_key(addr))
 
         if any(addr not in self.wallet.frozen_addresses for addr in addrs):
@@ -1176,14 +1154,17 @@ class ElectrumWindow(QMainWindow):
 
 
     def get_sendable_balance(self):
-        return sum(sum(self.wallet.get_addr_balance(a)) for a in self.get_payment_sources())
+        return sum(map(lambda x:x['value'], self.get_coins()))
 
 
-    def get_payment_sources(self):
+    def get_coins(self):
         if self.pay_from:
             return self.pay_from
         else:
-            return self.wallet.get_account_addresses(self.current_account)
+            domain = self.wallet.get_account_addresses(self.current_account)
+            for i in self.wallet.frozen_addresses:
+                if i in domain: domain.remove(i)
+            return self.wallet.get_unspent_coins(domain)
 
 
     def send_from_addresses(self, addrs):
@@ -1229,6 +1210,39 @@ class ElectrumWindow(QMainWindow):
         run_hook('create_contact_menu', menu, item)
         menu.exec_(self.contacts_list.viewport().mapToGlobal(position))
 
+    def delete_invoice(self, item):
+        self.invoices.pop(key)
+        self.wallet.storage.put('invoices', self.invoices)
+        self.update_invoices_tab()
+
+    def show_invoice(self, key):
+        from electrum.paymentrequest import PaymentRequest
+        domain, value = self.invoices[key]
+        pr = PaymentRequest(self.config)
+        pr.read_file(key)
+        pr.domain = domain
+        pr.verify()
+        self.show_pr_details(pr)
+
+    def show_pr_details(self, pr):
+        msg = 'Domain: ' + pr.domain
+        msg += '\nStatus: ' + pr.get_status()
+        msg += '\nMemo: ' + pr.memo
+        msg += '\nPayment URL: ' + pr.payment_url
+        msg += '\n\nOutputs:\n' + '\n'.join(map(lambda x: x[0] + ' ' + self.format_amount(x[1])+ self.base_unit(), pr.get_outputs()))
+        QMessageBox.information(self, 'Invoice', msg , 'OK')
+
+    def create_invoice_menu(self, position):
+        item = self.invoices_list.itemAt(position)
+        if not item:
+            return
+        k = self.invoices_list.indexOfTopLevelItem(item)
+        key = self.invoices.keys()[k]
+        menu = QMenu()
+        menu.addAction(_("Details"), lambda: self.show_invoice(key))
+        menu.addAction(_("Delete"), lambda: self.delete_invoice(key))
+        menu.exec_(self.invoices_list.viewport().mapToGlobal(position))
+
 
     def update_receive_item(self, item):
         item.setFont(0, QFont(MONOSPACE_FONT))
@@ -1251,60 +1265,66 @@ class ElectrumWindow(QMainWindow):
 
     def update_receive_tab(self):
         l = self.receive_list
+        # extend the syntax for consistency
+        l.addChild = l.addTopLevelItem
+        l.insertChild = l.insertTopLevelItem
 
         l.clear()
-        l.setColumnHidden(2, False)
-        l.setColumnHidden(3, False)
         for i,width in enumerate(self.column_widths['receive']):
             l.setColumnWidth(i, width)
 
+        accounts = self.wallet.get_accounts()
         if self.current_account is None:
-            account_items = self.wallet.accounts.items()
-        elif self.current_account != -1:
-            account_items = [(self.current_account, self.wallet.accounts.get(self.current_account))]
+            account_items = sorted(accounts.items())
         else:
-            account_items = []
+            account_items = [(self.current_account, accounts.get(self.current_account))]
+
 
         for k, account in account_items:
-            name = self.wallet.get_account_name(k)
-            c,u = self.wallet.get_account_balance(k)
-            account_item = QTreeWidgetItem( [ name, '', self.format_amount(c+u), ''] )
-            l.addTopLevelItem(account_item)
-            account_item.setExpanded(self.accounts_expanded.get(k, True))
-            account_item.setData(0, 32, k)
-
-            if not self.wallet.is_seeded(k):
-                icon = QIcon(":icons/key.png")
-                account_item.setIcon(0, icon)
-
-            for is_change in ([0,1]):
-                name = _("Receiving") if not is_change else _("Change")
-                seq_item = QTreeWidgetItem( [ name, '', '', '', ''] )
-                account_item.addChild(seq_item)
+
+            if len(accounts) > 1:
+                name = self.wallet.get_account_name(k)
+                c,u = self.wallet.get_account_balance(k)
+                account_item = QTreeWidgetItem( [ name, '', self.format_amount(c+u), ''] )
+                l.addTopLevelItem(account_item)
+                account_item.setExpanded(self.accounts_expanded.get(k, True))
+                account_item.setData(0, 32, k)
+            else:
+                account_item = l
+
+            sequences = [0,1] if account.has_change() else [0]
+            for is_change in sequences:
+                if len(sequences) > 1:
+                    name = _("Receiving") if not is_change else _("Change")
+                    seq_item = QTreeWidgetItem( [ name, '', '', '', ''] )
+                    account_item.addChild(seq_item)
+                    if not is_change: 
+                        seq_item.setExpanded(True)
+                else:
+                    seq_item = account_item
+                    
                 used_item = QTreeWidgetItem( [ _("Used"), '', '', '', ''] )
                 used_flag = False
-                if not is_change: seq_item.setExpanded(True)
 
                 is_red = False
                 gap = 0
 
                 for address in account.get_addresses(is_change):
-                    h = self.wallet.history.get(address,[])
 
-                    if h == []:
+                    num, is_used = self.wallet.is_used(address)
+                    if num == 0:
                         gap += 1
                         if gap > self.wallet.gap_limit:
                             is_red = True
                     else:
                         gap = 0
 
-                    c, u = self.wallet.get_addr_balance(address)
-                    num_tx = '*' if h == ['*'] else "%d"%len(h)
-                    item = QTreeWidgetItem( [ address, '', '', num_tx] )
+                    item = QTreeWidgetItem( [ address, '', '', "%d"%num] )
                     self.update_receive_item(item)
                     if is_red:
                         item.setBackgroundColor(1, QColor('red'))
-                    if len(h) > 0 and c == -u:
+
+                    if is_used:
                         if not used_flag:
                             seq_item.insertChild(0,used_item)
                             used_flag = True
@@ -1312,30 +1332,6 @@ class ElectrumWindow(QMainWindow):
                     else:
                         seq_item.addChild(item)
 
-
-        for k, addr in self.wallet.get_pending_accounts():
-            name = self.wallet.labels.get(k,'')
-            account_item = QTreeWidgetItem( [ name + "  [ "+_('pending account')+" ]", '', '', ''] )
-            self.update_receive_item(item)
-            l.addTopLevelItem(account_item)
-            account_item.setExpanded(True)
-            account_item.setData(0, 32, k)
-            item = QTreeWidgetItem( [ addr, '', '', '', ''] )
-            account_item.addChild(item)
-            self.update_receive_item(item)
-
-
-        if self.wallet.imported_keys and (self.current_account is None or self.current_account == -1):
-            c,u = self.wallet.get_imported_balance()
-            account_item = QTreeWidgetItem( [ _('Imported'), '', self.format_amount(c+u), ''] )
-            l.addTopLevelItem(account_item)
-            account_item.setExpanded(True)
-            for address in self.wallet.imported_keys.keys():
-                item = QTreeWidgetItem( [ address, '', '', ''] )
-                self.update_receive_item(item)
-                account_item.addChild(item)
-
-
         # we use column 1 because column 0 may be hidden
         l.setCurrentItem(l.topLevelItem(0),1)
 
@@ -1438,13 +1434,16 @@ class ElectrumWindow(QMainWindow):
 
 
     def update_buttons_on_seed(self):
-        if not self.wallet.is_watching_only():
+        if self.wallet.has_seed():
            self.seed_button.show()
+        else:
+           self.seed_button.hide()
+
+        if not self.wallet.is_watching_only():
            self.password_button.show()
            self.send_button.setText(_("Send"))
         else:
            self.password_button.hide()
-           self.seed_button.hide()
            self.send_button.setText(_("Create unsigned transaction"))
 
 
@@ -1518,76 +1517,30 @@ class ElectrumWindow(QMainWindow):
         name = str(e.text())
         if not name: return
 
-        self.wallet.create_pending_account('1of1', name, password)
+        self.wallet.create_pending_account(name, password)
         self.update_receive_tab()
         self.tabs.setCurrentIndex(2)
 
 
 
-    def show_master_public_key_old(self):
-        dialog = QDialog(self)
-        dialog.setModal(1)
-        dialog.setWindowTitle(_("Master Public Key"))
-
-        main_text = QTextEdit()
-        main_text.setText(self.wallet.get_master_public_key())
-        main_text.setReadOnly(True)
-        main_text.setMaximumHeight(170)
-        qrw = QRCodeWidget(self.wallet.get_master_public_key())
-
-        ok_button = QPushButton(_("OK"))
-        ok_button.setDefault(True)
-        ok_button.clicked.connect(dialog.accept)
-
-        main_layout = QGridLayout()
-        main_layout.addWidget(QLabel(_('Your Master Public Key is:')), 0, 0, 1, 2)
-
-        main_layout.addWidget(main_text, 1, 0)
-        main_layout.addWidget(qrw, 1, 1 )
-
-        vbox = QVBoxLayout()
-        vbox.addLayout(main_layout)
-        vbox.addLayout(close_button(dialog))
-        dialog.setLayout(vbox)
-        dialog.exec_()
-
-
-    def show_master_public_key(self):
 
-        if self.wallet.seed_version == 4:
-            self.show_master_public_key_old()
-            return
+    def show_master_public_keys(self):
 
         dialog = QDialog(self)
         dialog.setModal(1)
         dialog.setWindowTitle(_("Master Public Keys"))
 
-        mpk_text = QTextEdit()
-        mpk_text.setReadOnly(True)
-        mpk_text.setMaximumHeight(170)
-        mpk_qrw = QRCodeWidget()
-
         main_layout = QGridLayout()
-
-        main_layout.addWidget(QLabel(_('Key')), 1, 0)
-        main_layout.addWidget(mpk_text, 1, 1)
-        main_layout.addWidget(mpk_qrw, 1, 2)
-
-        def update(key):
-            xpub = self.wallet.master_public_keys[str(key)]
-            mpk_text.setText(xpub)
-            mpk_qrw.set_addr(xpub)
-            mpk_qrw.update_qr()
-
-        key_selector = QComboBox()
-        keys = sorted(self.wallet.master_public_keys.keys())
-        key_selector.addItems(keys)
-
-        main_layout.addWidget(QLabel(_('Derivation:')), 0, 0)
-        main_layout.addWidget(key_selector, 0, 1)
-        dialog.connect(key_selector,SIGNAL("activated(QString)"),update)
-
-        update(keys[0])
+        mpk_dict = self.wallet.get_master_public_keys()
+        i = 0
+        for key, value in mpk_dict.items():
+            main_layout.addWidget(QLabel(key), i, 0)
+            mpk_text = QTextEdit()
+            mpk_text.setReadOnly(True)
+            mpk_text.setMaximumHeight(170)
+            mpk_text.setText(value)
+            main_layout.addWidget(mpk_text, i + 1, 0)
+            i += 2
 
         vbox = QVBoxLayout()
         vbox.addLayout(main_layout)
@@ -1599,29 +1552,18 @@ class ElectrumWindow(QMainWindow):
 
     @protected
     def show_seed_dialog(self, password):
-        if self.wallet.is_watching_only():
-            QMessageBox.information(self, _('Message'), _('This is a watching-only wallet'), _('OK'))
+        if not self.wallet.has_seed():
+            QMessageBox.information(self, _('Message'), _('This wallet has no seed'), _('OK'))
             return
 
-        if self.wallet.seed:
-            try:
-                mnemonic = self.wallet.get_mnemonic(password)
-            except Exception:
-                QMessageBox.warning(self, _('Error'), _('Incorrect Password'), _('OK'))
-                return
-            from seed_dialog import SeedDialog
-            d = SeedDialog(self, mnemonic, self.wallet.imported_keys)
-            d.exec_()
-        else:
-            l = {}
-            for k in self.wallet.master_private_keys.keys():
-                pk = self.wallet.get_master_private_key(k, password)
-                l[k] = pk
-            from seed_dialog import PrivateKeysDialog
-            d = PrivateKeysDialog(self,l)
-            d.exec_()
-
-
+        try:
+            mnemonic = self.wallet.get_mnemonic(password)
+        except Exception:
+            QMessageBox.warning(self, _('Error'), _('Incorrect Password'), _('OK'))
+            return
+        from seed_dialog import SeedDialog
+        d = SeedDialog(self, mnemonic, self.wallet.has_imported_keys())
+        d.exec_()
 
 
 
@@ -1859,7 +1801,7 @@ class ElectrumWindow(QMainWindow):
     def show_message(self, msg):
         QMessageBox.information(self, _('Message'), msg, _('OK'))
 
-    def password_dialog(self ):
+    def password_dialog(self, msg=None):
         d = QDialog(self)
         d.setModal(1)
         d.setWindowTitle(_("Enter Password"))
@@ -1868,7 +1810,8 @@ class ElectrumWindow(QMainWindow):
         pw.setEchoMode(2)
 
         vbox = QVBoxLayout()
-        msg = _('Please enter your password')
+        if not msg:
+            msg = _('Please enter your password')
         vbox.addWidget(QLabel(msg))
 
         grid = QGridLayout()
@@ -1903,14 +1846,13 @@ class ElectrumWindow(QMainWindow):
         try:
             tx_dict = json.loads(str(txt))
             assert "hex" in tx_dict.keys()
-            assert "complete" in tx_dict.keys()
-            tx = Transaction(tx_dict["hex"], tx_dict["complete"])
-            if not tx_dict["complete"]:
-                assert "input_info" in tx_dict.keys()
+            tx = Transaction(tx_dict["hex"])
+            if tx_dict.has_key("input_info"):
                 input_info = json.loads(tx_dict['input_info'])
                 tx.add_input_info(input_info)
             return tx
         except Exception:
+            traceback.print_exc(file=sys.stdout)
             pass
 
         QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
@@ -2013,36 +1955,86 @@ class ElectrumWindow(QMainWindow):
 
 
     @protected
-    def do_export_privkeys(self, password):
-        if not self.wallet.seed:
-            self.show_message(_("This wallet has no seed"))
+    def export_privkeys_dialog(self, password):
+        if self.wallet.is_watching_only():
+            self.show_message(_("This is a watching-only wallet"))
             return
 
-        self.show_message("%s\n%s\n%s" % (_("WARNING: ALL your private keys are secret."),  _("Exposing a single private key can compromise your entire wallet!"), _("In particular, DO NOT use 'redeem private key' services proposed by third parties.")))
+        d = QDialog(self)
+        d.setWindowTitle(_('Private keys'))
+        d.setMinimumSize(850, 300)
+        vbox = QVBoxLayout(d)
 
-        try:
-            select_export = _('Select file to export your private keys to')
-            fileName = self.getSaveFileName(select_export, 'electrum-private-keys.csv', "*.csv")
-            if fileName:
-                with open(fileName, "w+") as csvfile:
-                    transaction = csv.writer(csvfile)
-                    transaction.writerow(["address", "private_key"])
+        msg = "%s\n%s\n%s" % (_("WARNING: ALL your private keys are secret."), 
+                              _("Exposing a single private key can compromise your entire wallet!"), 
+                              _("In particular, DO NOT use 'redeem private key' services proposed by third parties."))
+        vbox.addWidget(QLabel(msg))
 
-                    addresses = self.wallet.addresses(True)
+        e = QTextEdit()
+        e.setReadOnly(True)
+        vbox.addWidget(e)
 
-                    for addr in addresses:
-                        pk = "".join(self.wallet.get_private_key(addr, password))
-                        transaction.writerow(["%34s"%addr,pk])
+        defaultname = 'electrum-private-keys.csv'
+        select_msg = _('Select file to export your private keys to')
+        hbox, filename_e, csv_button = filename_field(self, self.config, defaultname, select_msg)
+        vbox.addLayout(hbox)
 
-                    self.show_message(_("Private keys exported."))
+        h, b = ok_cancel_buttons2(d, _('Export'))
+        b.setEnabled(False)
+        vbox.addLayout(h)
+
+        private_keys = {}
+        addresses = self.wallet.addresses(True)
+        done = False
+        def privkeys_thread():
+            for addr in addresses:
+                time.sleep(0.1)
+                if done: 
+                    break
+                private_keys[addr] = "\n".join(self.wallet.get_private_key(addr, password))
+                d.emit(SIGNAL('computing_privkeys'))
+            d.emit(SIGNAL('show_privkeys'))
+
+        def show_privkeys():
+            s = "\n".join( map( lambda x: x[0] + "\t"+ x[1], private_keys.items()))
+            e.setText(s)
+            b.setEnabled(True)
+
+        d.connect(d, QtCore.SIGNAL('computing_privkeys'), lambda: e.setText("Please wait... %d/%d"%(len(private_keys),len(addresses))))
+        d.connect(d, QtCore.SIGNAL('show_privkeys'), show_privkeys)
+        threading.Thread(target=privkeys_thread).start()
 
+        if not d.exec_():
+            done = True
+            return
+
+        filename = filename_e.text()
+        if not filename:
+            return
+
+        try:
+            self.do_export_privkeys(filename, private_keys, csv_button.isChecked())
         except (IOError, os.error), reason:
             export_error_label = _("Electrum was unable to produce a private key-export.")
             QMessageBox.critical(None, _("Unable to create csv"), export_error_label + "\n" + str(reason))
 
         except Exception as e:
-          self.show_message(str(e))
-          return
+            self.show_message(str(e))
+            return
+
+        self.show_message(_("Private keys exported."))
+
+
+    def do_export_privkeys(self, fileName, pklist, is_csv):
+        with open(fileName, "w+") as f:
+            if is_csv:
+                transaction = csv.writer(f)
+                transaction.writerow(["address", "private_key"])
+                for addr, pk in pklist.items():
+                    transaction.writerow(["%34s"%addr,pk])
+            else:
+                import json
+                f.write(json.dumps(pklist, indent = 4))
 
 
     def do_import_labels(self):
@@ -2071,60 +2063,134 @@ class ElectrumWindow(QMainWindow):
             QMessageBox.critical(None, _("Unable to export labels"), _("Electrum was unable to export your labels.")+"\n" + str(reason))
 
 
-    def do_export_history(self):
-        wallet = self.wallet
-        select_export = _('Select file to export your wallet transactions to')
-        fileName = QFileDialog.getSaveFileName(QWidget(), select_export, os.path.expanduser('~/electrum-history.csv'), "*.csv")
-        if not fileName:
+    def export_history_dialog(self):
+
+        d = QDialog(self)
+        d.setWindowTitle(_('Export History'))
+        d.setMinimumSize(400, 200)
+        vbox = QVBoxLayout(d)
+
+        defaultname = os.path.expanduser('~/electrum-history.csv')
+        select_msg = _('Select file to export your wallet transactions to')
+
+        hbox, filename_e, csv_button = filename_field(self, self.config, defaultname, select_msg)
+        vbox.addLayout(hbox)
+
+        vbox.addStretch(1)
+
+        h, b = ok_cancel_buttons2(d, _('Export'))
+        vbox.addLayout(h)
+        if not d.exec_():
+            return
+
+        filename = filename_e.text()
+        if not filename:
             return
 
         try:
-            with open(fileName, "w+") as csvfile:
-                transaction = csv.writer(csvfile)
+            self.do_export_history(self.wallet, filename, csv_button.isChecked())
+        except (IOError, os.error), reason:
+            export_error_label = _("Electrum was unable to produce a transaction export.")
+            QMessageBox.critical(self, _("Unable to export history"), export_error_label + "\n" + str(reason))
+            return
+
+        QMessageBox.information(self,_("History exported"), _("Your wallet history has been successfully exported."))
+
+
+    def do_export_history(self, wallet, fileName, is_csv):
+        history = wallet.get_tx_history()
+        lines = []
+        for item in history:
+            tx_hash, confirmations, is_mine, value, fee, balance, timestamp = item
+            if confirmations:
+                if timestamp is not None:
+                    try:
+                        time_string = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
+                    except [RuntimeError, TypeError, NameError] as reason:
+                        time_string = "unknown"
+                        pass
+                else:
+                    time_string = "unknown"
+            else:
+                time_string = "pending"
+
+            if value is not None:
+                value_string = format_satoshis(value, True)
+            else:
+                value_string = '--'
+
+            if fee is not None:
+                fee_string = format_satoshis(fee, True)
+            else:
+                fee_string = '0'
+
+            if tx_hash:
+                label, is_default_label = wallet.get_label(tx_hash)
+                label = label.encode('utf-8')
+            else:
+                label = ""
+
+            balance_string = format_satoshis(balance, False)
+            if is_csv:
+                lines.append([tx_hash, label, confirmations, value_string, fee_string, balance_string, time_string])
+            else:
+                lines.append({'txid':tx_hash, 'date':"%16s"%time_string, 'label':label, 'value':value_string})
+
+        with open(fileName, "w+") as f:
+            if is_csv:
+                transaction = csv.writer(f)
                 transaction.writerow(["transaction_hash","label", "confirmations", "value", "fee", "balance", "timestamp"])
-                for item in wallet.get_tx_history():
-                    tx_hash, confirmations, is_mine, value, fee, balance, timestamp = item
-                    if confirmations:
-                        if timestamp is not None:
-                            try:
-                                time_string = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
-                            except [RuntimeError, TypeError, NameError] as reason:
-                                time_string = "unknown"
-                                pass
-                        else:
-                          time_string = "unknown"
-                    else:
-                        time_string = "pending"
+                for line in lines:
+                    transaction.writerow(line)
+            else:
+                import json
+                f.write(json.dumps(lines, indent = 4))
 
-                    if value is not None:
-                        value_string = format_satoshis(value, True)
-                    else:
-                        value_string = '--'
 
-                    if fee is not None:
-                        fee_string = format_satoshis(fee, True)
-                    else:
-                        fee_string = '0'
+    def sweep_key_dialog(self):
+        d = QDialog(self)
+        d.setWindowTitle(_('Sweep private keys'))
+        d.setMinimumSize(600, 300)
 
-                    if tx_hash:
-                        label, is_default_label = wallet.get_label(tx_hash)
-                        label = label.encode('utf-8')
-                    else:
-                      label = ""
+        vbox = QVBoxLayout(d)
+        vbox.addWidget(QLabel(_("Enter private keys")))
 
-                    balance_string = format_satoshis(balance, False)
-                    transaction.writerow([tx_hash, label, confirmations, value_string, fee_string, balance_string, time_string])
-                QMessageBox.information(None,_("CSV Export created"), _("Your CSV export has been successfully created."))
+        keys_e = QTextEdit()
+        keys_e.setTabChangesFocus(True)
+        vbox.addWidget(keys_e)
 
-        except (IOError, os.error), reason:
-            export_error_label = _("Electrum was unable to produce a transaction export.")
-            QMessageBox.critical(None,_("Unable to create csv"), export_error_label + "\n" + str(reason))
+        h, address_e = address_field(self.wallet.addresses())
+        vbox.addLayout(h)
+
+        vbox.addStretch(1)
+        hbox, button = ok_cancel_buttons2(d, _('Sweep'))
+        vbox.addLayout(hbox)
+        button.setEnabled(False)
 
+        def get_address():
+            addr = str(address_e.text())
+            if bitcoin.is_address(addr):
+                return addr
+
+        def get_pk():
+            pk = str(keys_e.toPlainText()).strip()
+            if Wallet.is_private_key(pk):
+                return pk.split()
+
+        f = lambda: button.setEnabled(get_address() is not None and get_pk() is not None)
+        keys_e.textChanged.connect(f)
+        address_e.textChanged.connect(f)
+        if not d.exec_():
+            return
+
+        fee = self.wallet.fee
+        tx = Transaction.sweep(get_pk(), self.network, get_address(), fee)
+        self.show_transaction(tx)
 
 
     @protected
     def do_import_privkey(self, password):
-        if not self.wallet.imported_keys:
+        if not self.wallet.has_imported_keys():
             r = QMessageBox.question(None, _('Warning'), '<b>'+_('Warning') +':\n</b><br/>'+ _('Imported keys are not recoverable from seed.') + ' ' \
                                          + _('If you ever need to restore your wallet from its seed, these keys will be lost.') + '<p>' \
                                          + _('Are you sure you understand what you are doing?'), 3, 4)
@@ -2190,7 +2256,7 @@ class ElectrumWindow(QMainWindow):
 
         fee_label = QLabel(_('Transaction fee') + ':')
         grid.addWidget(fee_label, 2, 0)
-        fee_e = AmountEdit(self.base_unit)
+        fee_e = BTCAmountEdit(self.get_decimal_point)
         fee_e.setText(self.format_amount(self.wallet.fee).strip())
         grid.addWidget(fee_e, 2, 1)
         msg = _('Fee per kilobyte of transaction.') + ' ' \
@@ -2216,18 +2282,31 @@ class ElectrumWindow(QMainWindow):
         grid.addWidget(HelpButton(_('Using change addresses makes it more difficult for other people to track your transactions.')+' '), 4, 2)
         if not self.config.is_modifiable('use_change'): usechange_cb.setEnabled(False)
 
-        grid.setRowStretch(5,1)
+        block_explorers = ['Blockchain.info', 'Blockr.io', 'Insight.is']
+        block_ex_label = QLabel(_('Online Block Explorer') + ':')
+        grid.addWidget(block_ex_label, 5, 0)
+        block_ex_combo = QComboBox()
+        block_ex_combo.addItems(block_explorers)
+        block_ex_combo.setCurrentIndex(block_explorers.index(self.config.get('block_explorer', 'Blockchain.info')))
+        grid.addWidget(block_ex_combo, 5, 1)
+        grid.addWidget(HelpButton(_('Choose which online block explorer to use for functions that open a web browser')+' '), 5, 2)
+
+        show_tx = self.config.get('show_before_broadcast', False)
+        showtx_cb = QCheckBox(_('Show before broadcast'))
+        showtx_cb.setChecked(show_tx)
+        grid.addWidget(showtx_cb, 6, 0)
+        grid.addWidget(HelpButton(_('Display the details of your transactions before broadcasting it.')), 6, 2)
 
         vbox.addLayout(grid)
+        vbox.addStretch(1)
         vbox.addLayout(ok_cancel_buttons(d))
         d.setLayout(vbox)
 
         # run the dialog
         if not d.exec_(): return
 
-        fee = unicode(fee_e.text())
         try:
-            fee = self.read_amount(fee)
+            fee = self.fee_e.get_amount()
         except Exception:
             QMessageBox.warning(self, _('Error'), _('Invalid value') +': %s'%fee, _('OK'))
             return
@@ -2253,6 +2332,9 @@ class ElectrumWindow(QMainWindow):
             self.wallet.use_change = usechange_result
             self.wallet.storage.put('use_change', self.wallet.use_change)
 
+        if showtx_cb.isChecked() != show_tx:
+            self.config.set_key('show_before_broadcast', not show_tx)
+
         unit_result = units[unit_combo.currentIndex()]
         if self.base_unit() != unit_result:
             self.decimal_point = 8 if unit_result == 'BTC' else 5
@@ -2267,6 +2349,9 @@ class ElectrumWindow(QMainWindow):
             self.config.set_key("language", lang_request, True)
             need_restart = True
 
+        be_result = block_explorers[block_ex_combo.currentIndex()]
+        self.config.set_key('block_explorer', be_result, True)
+
         run_hook('close_settings_dialog')
 
         if need_restart:
@@ -2280,8 +2365,10 @@ class ElectrumWindow(QMainWindow):
 
     def closeEvent(self, event):
         self.tray.hide()
-        g = self.geometry()
-        self.config.set_key("winpos-qt", [g.left(),g.top(),g.width(),g.height()], True)
+        self.config.set_key("is_maximized", self.isMaximized())
+        if not self.isMaximized():
+            g = self.geometry()
+            self.config.set_key("winpos-qt", [g.left(),g.top(),g.width(),g.height()])
         self.save_column_widths()
         self.config.set_key("console-history", self.console.history[-50:], True)
         self.wallet.storage.put('accounts_expanded', self.accounts_expanded)