fix: gui_object.payment_request
[electrum-nvc.git] / gui / qt / main_window.py
index 6fdd7b6..f7b62fc 100644 (file)
@@ -20,6 +20,7 @@ import sys, time, datetime, re, threading
 from electrum.i18n import _, set_language
 from electrum.util import print_error, print_msg
 import os.path, json, ast, traceback
+import webbrowser
 import shutil
 import StringIO
 
@@ -68,7 +69,7 @@ import re
 from util import *
 
 
-        
+
 
 
 
@@ -98,69 +99,29 @@ class StatusBarButton(QPushButton):
 default_column_widths = { "history":[40,140,350,140], "contacts":[350,330], "receive": [370,200,130] }
 
 class ElectrumWindow(QMainWindow):
-    def changeEvent(self, event):
-        flags = self.windowFlags();
-        if event and event.type() == QtCore.QEvent.WindowStateChange:
-            if self.windowState() & QtCore.Qt.WindowMinimized:
-                self.build_menu(True)
-                # The only way to toggle the icon in the window managers taskbar is to use the Qt.Tooltip flag
-                # The problem is that it somehow creates an (in)visible window that will stay active and prevent
-                # Electrum from closing.
-                # As for now I have no clue how to implement a proper 'hide to tray' functionality.
-                # self.setWindowFlags(flags & ~Qt.ToolTip)
-            elif event.oldState() & QtCore.Qt.WindowMinimized:
-                self.build_menu(False)
-                #self.setWindowFlags(flags | Qt.ToolTip)
-
-    def build_menu(self, is_hidden = False):
-        m = QMenu()
-        if self.isMinimized():
-            m.addAction(_("Show"), self.showNormal)
-        else:
-            m.addAction(_("Hide"), self.showMinimized)
-
-        m.addSeparator()
-        m.addAction(_("Exit Electrum"), self.close)
-        self.tray.setContextMenu(m)
 
-    def tray_activated(self, reason):
-        if reason == QSystemTrayIcon.DoubleClick:
-            self.showNormal()
 
-    def showNormal(self):
-        self.setWindowState(self.windowState() & ~QtCore.Qt.WindowMinimized | QtCore.Qt.WindowActive)
 
-    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', 8)
+        self.decimal_point = config.get('decimal_point', 5)
         self.num_zeros     = int(config.get('num_zeros',0))
 
         set_language(config.get('language'))
 
         self.funds_error = False
+        self.payment_request = None
         self.completions = QStringListModel()
 
         self.tabs = tabs = QTabWidget(self)
@@ -176,19 +137,28 @@ 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()
 
         QShortcut(QKeySequence("Ctrl+W"), self, self.close)
-        QShortcut(QKeySequence("Ctrl+R"), self, self.update_wallet)
         QShortcut(QKeySequence("Ctrl+Q"), self, self.close)
+        QShortcut(QKeySequence("Ctrl+R"), self, self.update_wallet)
         QShortcut(QKeySequence("Ctrl+PgUp"), self, lambda: tabs.setCurrentIndex( (tabs.currentIndex() - 1 )%tabs.count() ))
         QShortcut(QKeySequence("Ctrl+PgDown"), self, lambda: tabs.setCurrentIndex( (tabs.currentIndex() + 1 )%tabs.count() ))
-        
+
+        for i in range(tabs.count()):
+            QShortcut(QKeySequence("Alt+" + str(i + 1)), self, lambda i=i: tabs.setCurrentIndex(i))
+
         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)
 
@@ -204,58 +174,8 @@ 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()
-
-    def go_lite(self):
-        self.config.set_key('lite_mode', True, True)
-        self.hide()
-        self.mini.show()
-
-
-    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()
-            return
-
-        actuator = lite_window.MiniActuator(self)
-
-        # Should probably not modify the current path but instead
-        # change the behaviour of rsrc(...)
-        old_path = QDir.currentPath()
-        actuator.load_theme()
-
-        self.mini = lite_window.MiniWindow(actuator, self.go_full, self.config)
-
-        driver = lite_window.MiniDriver(self, self.mini)
-
-        # Reset path back to original value now that loading the GUI
-        # is completed.
-        QDir.setCurrent(old_path)
-
-        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):
         # account selector
         accounts = self.wallet.get_account_names()
@@ -281,7 +201,14 @@ 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()
@@ -301,8 +228,8 @@ class ElectrumWindow(QMainWindow):
             return
 
         self.wallet.stop_threads()
-        
-        # create new wallet 
+
+        # create new wallet
         wallet = Wallet(storage)
         wallet.start_threads(self.network)
 
@@ -342,8 +269,8 @@ class ElectrumWindow(QMainWindow):
             return
 
         wizard = installwizard.InstallWizard(self.config, self.network, storage)
-        wallet = wizard.run()
-        if wallet: 
+        wallet = wizard.run('new')
+        if wallet:
             self.load_wallet(wallet)
 
 
@@ -352,99 +279,58 @@ class ElectrumWindow(QMainWindow):
         menubar = QMenuBar()
 
         file_menu = menubar.addMenu(_("&File"))
-        open_wallet_action = file_menu.addAction(_("&Open"))
-        open_wallet_action.triggered.connect(self.open_wallet)
-
-        new_wallet_action = file_menu.addAction(_("&Create/Restore"))
-        new_wallet_action.triggered.connect(self.new_wallet)
-
-        wallet_backup = file_menu.addAction(_("&Copy"))
-        wallet_backup.triggered.connect(self.backup_wallet)
-
-        quit_item = file_menu.addAction(_("&Close"))
-        quit_item.triggered.connect(self.close)
+        file_menu.addAction(_("&Open"), self.open_wallet).setShortcut(QKeySequence.Open)
+        file_menu.addAction(_("&New/Restore"), self.new_wallet).setShortcut(QKeySequence.New)
+        file_menu.addAction(_("&Save Copy"), self.backup_wallet).setShortcut(QKeySequence.SaveAs)
+        file_menu.addAction(_("&Quit"), self.close)
 
         wallet_menu = menubar.addMenu(_("&Wallet"))
-
-        new_contact = wallet_menu.addAction(_("&New contact"))
-        new_contact.triggered.connect(self.new_contact_dialog)
-
-        self.new_account = wallet_menu.addAction(_("&New account"))
-        self.new_account.triggered.connect(self.new_account_dialog)
+        wallet_menu.addAction(_("&New contact"), self.new_contact_dialog)
+        self.new_account_menu = wallet_menu.addAction(_("&New account"), self.new_account_dialog)
 
         wallet_menu.addSeparator()
 
-        pw = wallet_menu.addAction(_("&Password"))
-        pw.triggered.connect(self.change_password_dialog)
-
-        show_seed = wallet_menu.addAction(_("&Seed"))
-        show_seed.triggered.connect(self.show_seed_dialog)
-
-        show_mpk = wallet_menu.addAction(_("&Master Public Key"))
-        show_mpk.triggered.connect(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"))
-        import_labels = labels_menu.addAction(_("&Import"))
-        import_labels.triggered.connect(self.do_import_labels)
-        export_labels = labels_menu.addAction(_("&Export"))
-        export_labels.triggered.connect(self.do_export_labels)
-
-        keys_menu = wallet_menu.addMenu(_("&Private keys"))
-        import_keys = keys_menu.addAction(_("&Import"))
-        import_keys.triggered.connect(self.do_import_privkey)
-        export_keys = keys_menu.addAction(_("&Export"))
-        export_keys.triggered.connect(self.do_export_privkeys)
-
-        ex_history = wallet_menu.addAction(_("&Export History"))
-        ex_history.triggered.connect(self.do_export_history)
-
+        labels_menu.addAction(_("&Import"), self.do_import_labels)
+        labels_menu.addAction(_("&Export"), self.do_export_labels)
 
+        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"))
 
         # Settings / Preferences are all reserved keywords in OSX using this as work around
-        preferences_name = _("Electrum preferences") if sys.platform == 'darwin' else _("Preferences")
-        preferences_menu = tools_menu.addAction(preferences_name)
-        preferences_menu.triggered.connect(self.settings_dialog)
-
-        network = tools_menu.addAction(_("&Network"))
-        network.triggered.connect(self.run_network_dialog)
-
-        plugins_labels = tools_menu.addAction(_("&Plugins"))
-        plugins_labels.triggered.connect(self.plugins_dialog)
-
+        tools_menu.addAction(_("Electrum preferences") if sys.platform == 'darwin' else _("Preferences"), self.settings_dialog)
+        tools_menu.addAction(_("&Network"), self.run_network_dialog)
+        tools_menu.addAction(_("&Plugins"), self.plugins_dialog)
+        tools_menu.addSeparator()
+        tools_menu.addAction(_("&Sign/verify message"), self.sign_verify_message)
+        #tools_menu.addAction(_("&Encrypt/decrypt message"), self.encrypt_message)
         tools_menu.addSeparator()
 
         csv_transaction_menu = tools_menu.addMenu(_("&Create transaction"))
-
-        csv_transaction_file = csv_transaction_menu.addAction(_("&From CSV file"))
-        csv_transaction_file.triggered.connect(self.do_process_from_csv_file)
-
-        csv_transaction_text = csv_transaction_menu.addAction(_("&From CSV text"))
-        csv_transaction_text.triggered.connect(self.do_process_from_csv_text)
+        csv_transaction_menu.addAction(_("&From CSV file"), self.do_process_from_csv_file)
+        csv_transaction_menu.addAction(_("&From CSV text"), self.do_process_from_csv_text)
 
         raw_transaction_menu = tools_menu.addMenu(_("&Load transaction"))
-
-        raw_transaction_file = raw_transaction_menu.addAction(_("&From file"))
-        raw_transaction_file.triggered.connect(self.do_process_from_file)
-
-        raw_transaction_text = raw_transaction_menu.addAction(_("&From text"))
-        raw_transaction_text.triggered.connect(self.do_process_from_text)
-
+        raw_transaction_menu.addAction(_("&From file"), self.do_process_from_file)
+        raw_transaction_menu.addAction(_("&From text"), self.do_process_from_text)
+        raw_transaction_menu.addAction(_("&From the blockchain"), self.do_process_from_txid)
 
         help_menu = menubar.addMenu(_("&Help"))
-        show_about = help_menu.addAction(_("&About"))
-        show_about.triggered.connect(self.show_about)
-        web_open = help_menu.addAction(_("&Official website")) 
-        web_open.triggered.connect(lambda: webbrowser.open("http://electrum.org"))
-
+        help_menu.addAction(_("&About"), self.show_about)
+        help_menu.addAction(_("&Official website"), lambda: webbrowser.open("http://electrum.org"))
         help_menu.addSeparator()
-        doc_open = help_menu.addAction(_("&Documentation"))
-        doc_open.triggered.connect(lambda: webbrowser.open("http://electrum.org/documentation.html"))
-        report_bug = help_menu.addAction(_("&Report Bug"))
-        report_bug.triggered.connect(self.show_report_bug)
+        help_menu.addAction(_("&Documentation"), lambda: webbrowser.open("http://electrum.org/documentation.html")).setShortcut(QKeySequence.HelpContents)
+        help_menu.addAction(_("&Report Bug"), self.show_report_bug)
 
         self.setMenuBar(menubar)
 
@@ -458,16 +344,16 @@ class ElectrumWindow(QMainWindow):
 
 
     def notify_transactions(self):
-        if not self.network or not self.network.is_connected(): 
+        if not self.network or not self.network.is_connected():
             return
 
         print_error("Notifying GUI")
-        if len(self.network.interface.pending_transactions_for_notifications) > 0:
+        if len(self.network.pending_transactions_for_notifications) > 0:
             # Combine the transactions if there are more then three
-            tx_amount = len(self.network.interface.pending_transactions_for_notifications)
+            tx_amount = len(self.network.pending_transactions_for_notifications)
             if(tx_amount >= 3):
                 total_amount = 0
-                for tx in self.network.interface.pending_transactions_for_notifications:
+                for tx in self.network.pending_transactions_for_notifications:
                     is_relevant, is_mine, v, fee = self.wallet.get_tx_value(tx)
                     if(v > 0):
                         total_amount += v
@@ -475,11 +361,11 @@ class ElectrumWindow(QMainWindow):
                 self.notify(_("%(txs)s new transactions received. Total amount received in the new transactions %(amount)s %(unit)s") \
                                 % { 'txs' : tx_amount, 'amount' : self.format_amount(total_amount), 'unit' : self.base_unit()})
 
-                self.network.interface.pending_transactions_for_notifications = []
+                self.network.pending_transactions_for_notifications = []
             else:
-              for tx in self.network.interface.pending_transactions_for_notifications:
+              for tx in self.network.pending_transactions_for_notifications:
                   if tx:
-                      self.network.interface.pending_transactions_for_notifications.remove(tx)
+                      self.network.pending_transactions_for_notifications.remove(tx)
                       is_relevant, is_mine, v, fee = self.wallet.get_tx_value(tx)
                       if(v > 0):
                           self.notify(_("New transaction received. %(amount)s %(unit)s") % { 'amount' : self.format_amount(v), 'unit' : self.base_unit()})
@@ -491,14 +377,14 @@ 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):
@@ -518,7 +404,7 @@ class ElectrumWindow(QMainWindow):
             self.update_wallet()
             self.need_update.clear()
         run_hook('timer_actions')
-    
+
     def format_amount(self, x, is_diff=False, whitespaces=False):
         return format_satoshis(x, is_diff, self.num_zeros, self.decimal_point, whitespaces)
 
@@ -533,7 +419,7 @@ class ElectrumWindow(QMainWindow):
 
 
     def update_status(self):
-        if self.network is None:
+        if self.network is None or not self.network.is_running():
             text = _("Offline")
             icon = QIcon(":icons/status_disconnected.png")
 
@@ -549,11 +435,12 @@ class ElectrumWindow(QMainWindow):
                 text =  _( "Balance" ) + ": %s "%( self.format_amount(c) ) + self.base_unit()
                 if u: text +=  " [%s unconfirmed]"%( self.format_amount(u,True).strip() )
 
+                # append fiat balance and price from exchange rate plugin
                 r = {}
-                run_hook('set_quote_text', c+u, r)
+                run_hook('get_fiat_status_text', c+u, r)
                 quote = r.get(0)
                 if quote:
-                    text += "  (%s)"%quote
+                    text += "%s"%quote
 
                 self.tray.setToolTip(text)
                 icon = QIcon(":icons/status_connected.png")
@@ -573,7 +460,7 @@ class ElectrumWindow(QMainWindow):
             self.update_contacts_tab()
             self.update_completions()
 
-        
+
     def create_history_tab(self):
         self.history_list = l = MyTreeWidget(self)
         l.setColumnCount(5)
@@ -588,8 +475,15 @@ class ElectrumWindow(QMainWindow):
 
 
     def create_history_menu(self, position):
-        self.history_list.selectedIndexes() 
+        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
@@ -597,6 +491,7 @@ 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 block explorer"), lambda: webbrowser.open(block_explorer + tx_hash))
         menu.exec_(self.contacts_list.viewport().mapToGlobal(position))
 
 
@@ -614,14 +509,14 @@ class ElectrumWindow(QMainWindow):
             self.is_edit=False
 
     def tx_label_changed(self, item, column):
-        if self.is_edit: 
+        if self.is_edit:
             return
         self.is_edit=True
         tx_hash = str(item.data(0, Qt.UserRole).toString())
         tx = self.wallet.transactions.get(tx_hash)
         text = unicode( item.text(2) )
-        self.wallet.set_label(tx_hash, text) 
-        if text: 
+        self.wallet.set_label(tx_hash, text)
+        if text:
             item.setForeground(2, QBrush(QColor('black')))
         else:
             text = self.wallet.get_default_label(tx_hash)
@@ -663,7 +558,7 @@ class ElectrumWindow(QMainWindow):
             if changed:
                 self.update_history_tab()
                 self.update_completions()
-                
+
             self.current_item_changed(item)
 
         run_hook('item_changed', item, column)
@@ -672,9 +567,6 @@ class ElectrumWindow(QMainWindow):
     def current_item_changed(self, a):
         run_hook('current_item_changed', a)
 
-        self.pay_from = []
-        self.tabs.emit(SIGNAL('currentChanged(int)'), 1)
-
 
 
     def update_history_tab(self):
@@ -706,7 +598,7 @@ class ElectrumWindow(QMainWindow):
                 v_str = '--'
 
             balance_str = self.format_amount(balance, whitespaces=True)
-            
+
             if tx_hash:
                 label, is_default_label = self.wallet.get_label(tx_hash)
             else:
@@ -727,9 +619,10 @@ class ElectrumWindow(QMainWindow):
 
             item.setIcon(0, icon)
             self.history_list.insertTopLevelItem(0,item)
-            
+
 
         self.history_list.setCurrentItem(self.history_list.topLevelItem(0))
+        run_hook('history_tab_update')
 
 
     def create_send_tab(self):
@@ -744,7 +637,7 @@ class ElectrumWindow(QMainWindow):
         self.payto_e = QLineEdit()
         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)
 
         completer = QCompleter()
@@ -757,7 +650,6 @@ class ElectrumWindow(QMainWindow):
         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)
 
-        self.pay_from = []
         self.from_label = QLabel(_('From'))
         grid.addWidget(self.from_label, 3, 0)
         self.from_list = QTreeWidget(self)
@@ -767,7 +659,7 @@ class ElectrumWindow(QMainWindow):
         self.from_list.setHeaderHidden (True)
         self.from_list.setMaximumHeight(80)
         grid.addWidget(self.from_list, 3, 1, 1, 3)
-        self.connect(self.tabs, SIGNAL('currentChanged(int)'), lambda: self.update_pay_from_list(grid))
+        self.set_pay_from([])
 
         self.amount_e = AmountEdit(self.base_unit)
         grid.addWidget(QLabel(_('Amount')), 4, 0)
@@ -776,7 +668,7 @@ class ElectrumWindow(QMainWindow):
                 _('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)
-        
+
         self.fee_e = AmountEdit(self.base_unit)
         grid.addWidget(QLabel(_('Fee')), 5, 0)
         grid.addWidget(self.fee_e, 5, 1, 1, 2)
@@ -785,6 +677,7 @@ class ElectrumWindow(QMainWindow):
                     + _('The amount of fee can be decided freely by the sender. However, transactions with low fees take more time to be processed.') + '\n\n'\
                     + _('A suggested fee is automatically added to this field. You may override it. The suggested fee increases with the size of the transaction.')), 5, 3)
 
+        run_hook('exchange_rate_button', grid)
 
         self.send_button = EnterButton(_("Send"), self.do_send)
         grid.addWidget(self.send_button, 6, 1)
@@ -797,7 +690,7 @@ class ElectrumWindow(QMainWindow):
 
         QShortcut(QKeySequence("Up"), w, w.focusPreviousChild)
         QShortcut(QKeySequence("Down"), w, w.focusNextChild)
-        w.setLayout(grid) 
+        w.setLayout(grid)
 
         w2 = QWidget()
         vbox = QVBoxLayout()
@@ -811,20 +704,22 @@ class ElectrumWindow(QMainWindow):
             if self.amount_e.is_shortcut:
                 self.amount_e.is_shortcut = False
                 sendable = self.get_sendable_balance()
-                inputs, total, fee = self.wallet.choose_tx_inputs( sendable, 0, self.get_payment_sources())
-                fee = self.wallet.estimated_fee(inputs)
+                # 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())
+                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()))
 
             if not is_fee: fee = None
             if amount is None:
                 return
-            inputs, total, fee = self.wallet.choose_tx_inputs(amount, fee, self.get_payment_sources())
+            # 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())
             if not is_fee:
                 self.fee_e.setText( self.format_amount( fee ) )
             if inputs:
@@ -837,7 +732,7 @@ class ElectrumWindow(QMainWindow):
                 self.funds_error = True
                 text = _( "Not enough funds" )
                 c, u = self.wallet.get_frozen_balance()
-                if c+u: text += ' (' + self.format_amount(c+u).strip() + self.base_unit() + ' ' +_("are frozen") + ')'
+                if c+u: text += ' (' + self.format_amount(c+u).strip() + ' ' + self.base_unit() + ' ' +_("are frozen") + ')'
 
             self.statusBar().showMessage(text)
             self.amount_e.setPalette(palette)
@@ -850,7 +745,8 @@ class ElectrumWindow(QMainWindow):
         return w2
 
 
-    def update_pay_from_list(self, grid):
+    def set_pay_from(self, l):
+        self.pay_from = l
         self.from_list.clear()
         self.from_label.setHidden(len(self.pay_from) == 0)
         self.from_list.setHidden(len(self.pay_from) == 0)
@@ -875,24 +771,31 @@ 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
+            amount = self.gui_object.payment_request.get_amount()
 
-        if not is_valid(to_address):
-            QMessageBox.warning(self, _('Error'), _('Invalid Bitcoin Address') + ':\n' + to_address, _('OK'))
-            return
+        else:
+            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 not is_valid(to_address):
+                QMessageBox.warning(self, _('Error'), _('Invalid Bitcoin Address') + ':\n' + to_address, _('OK'))
+                return
+
+            try:
+                amount = self.read_amount(unicode( self.amount_e.text()))
+            except Exception:
+                QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
+                return
+
+            outputs = [(to_address, amount)]
 
-        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()))
         except Exception:
@@ -903,60 +806,117 @@ class ElectrumWindow(QMainWindow):
         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}):
                 return
+            
+        confirm_fee = self.config.get('confirm_fee', 100000)
+        if fee >= confirm_fee:
+            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):
+
+        # first, create an unsigned tx 
+        domain = self.get_payment_sources()
         try:
-            tx = self.wallet.mktx( [(to_address, amount)], password, fee,
-                    domain=self.get_payment_sources())
+            tx = self.wallet.make_unsigned_transaction(outputs, fee, None, domain)
+            tx.error = None
         except Exception as e:
             traceback.print_exc(file=sys.stdout)
             self.show_message(str(e))
             return
 
+        # call hook to see if plugin needs gui interaction
+        run_hook('send_tx', tx)
+
+        # sign the tx
+        def sign_thread():
+            time.sleep(0.1)
+            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()
+
+
+
+    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
+
         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
 
-        if label: 
+        if label:
             self.wallet.set_label(tx.hash(), label)
 
-        if tx.is_complete:
-            h = self.wallet.send_tx(tx)
-            waiting_dialog(lambda: False if self.wallet.tx_event.isSet() else _("Please wait..."))
-            status, msg = self.wallet.receive_tx( h )
-            if status:
-                QMessageBox.information(self, '', _('Payment sent.')+'\n'+msg, _('OK'))
-                self.do_clear()
-                self.update_contacts_tab()
-            else:
-                QMessageBox.warning(self, _('Error'), msg, _('OK'))
-        else:
-
+        if not tx.is_complete() or self.config.get('show_before_broadcast'):
             self.show_transaction(tx)
+            return
 
-        # 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 broadcast_thread():
+            if self.payment_request:
+                refund_address = self.wallet.addresses()[0]
+                self.payment_request.send_ack(str(tx), refund_address)
+                self.payment_request = None
+            # note: BIP 70 recommends not broadcasting the tx to the network and letting the merchant do that
+            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 set_url(self, url):
-        address, amount, label, message, signature, identity, url = util.parse_url(url)
+    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()
+        else:
+            QMessageBox.warning(self, _('Error'), msg, _('OK'))
+
 
-        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):
+        style = "QWidget { background-color:none;border:none;}"
+        self.tabs.setCurrentIndex(1)
+        self.payto_e.setReadOnly(True)
+        self.payto_e.setStyleSheet(style)
+        self.amount_e.setReadOnly(True)
+        self.payto_e.setText(_("please wait..."))
+        self.amount_e.setStyleSheet(style)
+        return True
+
+    def payment_request_ok(self):
+        self.payto_e.setText(self.gui_object.payment_request.domain)
+        self.amount_e.setText(self.format_amount(self.gui_object.payment_request.get_amount()))
+
+    def payment_request_error(self):
+        self.payto_e.setText(self.gui_object.payment_request.error)
+
+
+    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)):
@@ -964,8 +924,6 @@ 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
@@ -975,23 +933,15 @@ 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_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.setStyleSheet("")
 
-        self.pay_from = []
-        self.tabs.emit(SIGNAL('currentChanged(int)'), 1)
-
+        self.set_pay_from([])
         self.update_status()
 
     def set_frozen(self,entry,frozen):
@@ -1064,7 +1014,7 @@ class ElectrumWindow(QMainWindow):
         self.column_widths["receive"] = []
         for i in range(self.receive_list.columnCount() -1):
             self.column_widths["receive"].append(self.receive_list.columnWidth(i))
-        
+
         self.column_widths["history"] = []
         for i in range(self.history_list.columnCount() - 1):
             self.column_widths["history"].append(self.history_list.columnWidth(i))
@@ -1115,7 +1065,8 @@ class ElectrumWindow(QMainWindow):
         else:
             menu.addAction(_("Maximize"), lambda: self.account_set_expanded(item, k, True))
         menu.addAction(_("Rename"), lambda: self.edit_account_label(k))
-        menu.addAction(_("View details"), lambda: self.show_account_details(k))
+        if self.wallet.seed_version > 4:
+            menu.addAction(_("View details"), lambda: self.show_account_details(k))
         if self.wallet.account_is_pending(k):
             menu.addAction(_("Delete"), lambda: self.delete_pending_account(k))
         menu.exec_(self.receive_list.viewport().mapToGlobal(position))
@@ -1127,7 +1078,7 @@ class ElectrumWindow(QMainWindow):
     def create_receive_menu(self, position):
         # fixme: this function apparently has a side effect.
         # if it is not called the menu pops up several times
-        #self.receive_list.selectedIndexes() 
+        #self.receive_list.selectedIndexes()
 
         selected = self.receive_list.selectedItems()
         multi_select = len(selected) > 1
@@ -1150,10 +1101,12 @@ class ElectrumWindow(QMainWindow):
             menu.addAction(_("Copy to clipboard"), lambda: self.app.clipboard().setText(addr))
             menu.addAction(_("QR code"), lambda: self.show_qrcode("bitcoin:" + addr, _("Address")) )
             menu.addAction(_("Edit label"), lambda: self.edit_label(True))
-            if self.wallet.seed:
+            menu.addAction(_("Public keys"), lambda: self.show_public_keys(addr))
+            if not self.wallet.is_watching_only():
                 menu.addAction(_("Private key"), lambda: self.show_private_key(addr))
-                menu.addAction(_("Sign message"), lambda: self.sign_message(addr))
-            if addr in self.wallet.imported_keys:
+                menu.addAction(_("Sign/verify message"), lambda: self.sign_verify_message(addr))
+                #menu.addAction(_("Encrypt/decrypt message"), lambda: self.encrypt_message(addr))
+            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):
@@ -1161,9 +1114,10 @@ class ElectrumWindow(QMainWindow):
         if any(addr in self.wallet.frozen_addresses for addr in addrs):
             menu.addAction(_("Unfreeze"), lambda: self.set_addrs_frozen(addrs, False))
 
-        menu.addAction(_("Send From"), lambda: self.send_from_addresses(addrs))
-            
-        run_hook('receive_menu', menu)
+        if any(addr not in self.wallet.frozen_addresses for addr in addrs):
+            menu.addAction(_("Send From"), lambda: self.send_from_addresses(addrs))
+
+        run_hook('receive_menu', menu, addrs)
         menu.exec_(self.receive_list.viewport().mapToGlobal(position))
 
 
@@ -1179,7 +1133,7 @@ class ElectrumWindow(QMainWindow):
 
 
     def send_from_addresses(self, addrs):
-        self.pay_from = addrs[:]
+        self.set_pay_from( addrs )
         self.tabs.setCurrentIndex(1)
 
 
@@ -1203,18 +1157,20 @@ class ElectrumWindow(QMainWindow):
 
     def create_contact_menu(self, position):
         item = self.contacts_list.itemAt(position)
-        if not item: return
-        addr = unicode(item.text(0))
-        label = unicode(item.text(1))
-        is_editable = item.data(0,32).toBool()
-        payto_addr = item.data(0,33).toString()
         menu = QMenu()
-        menu.addAction(_("Copy to Clipboard"), lambda: self.app.clipboard().setText(addr))
-        menu.addAction(_("Pay to"), lambda: self.payto(payto_addr))
-        menu.addAction(_("QR code"), lambda: self.show_qrcode("bitcoin:" + addr, _("Address")))
-        if is_editable:
-            menu.addAction(_("Edit label"), lambda: self.edit_label(False))
-            menu.addAction(_("Delete"), lambda: self.delete_contact(addr))
+        if not item:
+            menu.addAction(_("New contact"), lambda: self.new_contact_dialog())
+        else:
+            addr = unicode(item.text(0))
+            label = unicode(item.text(1))
+            is_editable = item.data(0,32).toBool()
+            payto_addr = item.data(0,33).toString()
+            menu.addAction(_("Copy to Clipboard"), lambda: self.app.clipboard().setText(addr))
+            menu.addAction(_("Pay to"), lambda: self.payto(payto_addr))
+            menu.addAction(_("QR code"), lambda: self.show_qrcode("bitcoin:" + addr, _("Address")))
+            if is_editable:
+                menu.addAction(_("Edit label"), lambda: self.edit_label(False))
+                menu.addAction(_("Delete"), lambda: self.delete_contact(addr))
 
         run_hook('create_contact_menu', menu, item)
         menu.exec_(self.contacts_list.viewport().mapToGlobal(position))
@@ -1235,52 +1191,58 @@ class ElectrumWindow(QMainWindow):
         balance = self.format_amount(c + u)
         item.setData(2,0,balance)
 
-        if address in self.wallet.frozen_addresses: 
+        if address in self.wallet.frozen_addresses:
             item.setBackgroundColor(0, QColor('lightblue'))
 
 
     def update_receive_tab(self):
         l = self.receive_list
-        
+        # extend the syntax for consistency
+        l.addChild = l.addTopLevelItem
+
         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 == []:
                         gap += 1
                         if gap > self.wallet.gap_limit:
@@ -1290,42 +1252,19 @@ class ElectrumWindow(QMainWindow):
 
                     c, u = self.wallet.get_addr_balance(address)
                     num_tx = '*' if h == ['*'] else "%d"%len(h)
+
                     item = QTreeWidgetItem( [ address, '', '', num_tx] )
                     self.update_receive_item(item)
                     if is_red:
                         item.setBackgroundColor(1, QColor('red'))
                     if len(h) > 0 and c == -u:
                         if not used_flag:
-                            seq_item.addChild(used_item)
+                            seq_item.insertChild(0,used_item)
                             used_flag = True
                         used_item.addChild(item)
                     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)
 
@@ -1371,7 +1310,7 @@ class ElectrumWindow(QMainWindow):
         for m in dir(c):
             if m[0]=='_' or m in ['network','wallet']: continue
             methods[m] = mkfunc(c._run, m)
-            
+
         console.updateNamespace(methods)
 
 
@@ -1400,7 +1339,8 @@ class ElectrumWindow(QMainWindow):
         self.updatelabel = UpdateLabel(self.config, sb)
 
         self.account_selector = QComboBox()
-        self.connect(self.account_selector,SIGNAL("activated(QString)"),self.change_account) 
+        self.account_selector.setSizeAdjustPolicy(QComboBox.AdjustToContents)
+        self.connect(self.account_selector,SIGNAL("activated(QString)"),self.change_account)
         sb.addPermanentWidget(self.account_selector)
 
         if (int(qtVersion[0]) >= 4 and int(qtVersion[2]) >= 7):
@@ -1409,11 +1349,11 @@ class ElectrumWindow(QMainWindow):
         self.lock_icon = QIcon()
         self.password_button = StatusBarButton( self.lock_icon, _("Password"), self.change_password_dialog )
         sb.addPermanentWidget( self.password_button )
-            
+
         sb.addPermanentWidget( StatusBarButton( QIcon(":icons/preferences.png"), _("Preferences"), self.settings_dialog ) )
-        self.seed_button = StatusBarButton( QIcon(":icons/seed.png"), _("Seed"), self.show_seed_dialog ) 
+        self.seed_button = StatusBarButton( QIcon(":icons/seed.png"), _("Seed"), self.show_seed_dialog )
         sb.addPermanentWidget( self.seed_button )
-        self.status_button = StatusBarButton( QIcon(":icons/status_disconnected.png"), _("Network"), self.run_network_dialog ) 
+        self.status_button = StatusBarButton( QIcon(":icons/status_disconnected.png"), _("Network"), self.run_network_dialog )
         sb.addPermanentWidget( self.status_button )
 
         run_hook('create_status_bar', (sb,))
@@ -1427,13 +1367,16 @@ 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"))
 
 
@@ -1447,9 +1390,10 @@ class ElectrumWindow(QMainWindow):
     def new_contact_dialog(self):
 
         d = QDialog(self)
+        d.setWindowTitle(_("New Contact"))
         vbox = QVBoxLayout(d)
         vbox.addWidget(QLabel(_('New Contact')+':'))
-        
+
         grid = QGridLayout()
         line1 = QLineEdit()
         line2 = QLineEdit()
@@ -1460,17 +1404,17 @@ class ElectrumWindow(QMainWindow):
 
         vbox.addLayout(grid)
         vbox.addLayout(ok_cancel_buttons(d))
-    
+
         if not d.exec_():
             return
-        
+
         address = str(line1.text())
         label = unicode(line2.text())
-        
+
         if not is_valid(address):
             QMessageBox.warning(self, _('Error'), _('Invalid Address'), _('OK'))
             return
-        
+
         self.wallet.add_contact(address)
         if label:
             self.wallet.set_label(address, label)
@@ -1481,7 +1425,8 @@ class ElectrumWindow(QMainWindow):
         self.tabs.setCurrentIndex(3)
 
 
-    def new_account_dialog(self):
+    @protected
+    def new_account_dialog(self, password):
 
         dialog = QDialog(self)
         dialog.setModal(1)
@@ -1505,88 +1450,30 @@ class ElectrumWindow(QMainWindow):
         name = str(e.text())
         if not name: return
 
-        self.wallet.create_pending_account('1', name)
+        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"))
 
-        chain_text = QTextEdit()
-        chain_text.setReadOnly(True)
-        chain_text.setMaximumHeight(170)
-        chain_qrw = QRCodeWidget()
-
-        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)
-
-        main_layout.addWidget(QLabel(_('Chain')), 2, 0)
-        main_layout.addWidget(chain_text, 2, 1)
-        main_layout.addWidget(chain_qrw, 2, 2)
-
-        def update(key):
-            c, K, cK = self.wallet.master_public_keys[str(key)]
-            chain_text.setText(c)
-            chain_qrw.set_addr(c)
-            chain_qrw.update_qr()
-            mpk_text.setText(K)
-            mpk_qrw.set_addr(K)
-            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)
@@ -1594,33 +1481,22 @@ class ElectrumWindow(QMainWindow):
 
         dialog.setLayout(vbox)
         dialog.exec_()
-        
+
 
     @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.imported_keys)
+        d.exec_()
 
 
 
@@ -1673,7 +1549,7 @@ class ElectrumWindow(QMainWindow):
                 return
         else:
             password = None
-            
+
         if args != (False,):
             args = (self,) + args + (password,)
         else:
@@ -1681,15 +1557,54 @@ class ElectrumWindow(QMainWindow):
         apply( func, args)
 
 
+    def show_public_keys(self, address):
+        if not address: return
+        try:
+            pubkey_list = self.wallet.get_public_keys(address)
+        except Exception as e:
+            traceback.print_exc(file=sys.stdout)
+            self.show_message(str(e))
+            return
+
+        d = QDialog(self)
+        d.setMinimumSize(600, 200)
+        d.setModal(1)
+        vbox = QVBoxLayout()
+        vbox.addWidget( QLabel(_("Address") + ': ' + address))
+        vbox.addWidget( QLabel(_("Public key") + ':'))
+        keys = QTextEdit()
+        keys.setReadOnly(True)
+        keys.setText('\n'.join(pubkey_list))
+        vbox.addWidget(keys)
+        #vbox.addWidget( QRCodeWidget('\n'.join(pk_list)) )
+        vbox.addLayout(close_button(d))
+        d.setLayout(vbox)
+        d.exec_()
+
     @protected
     def show_private_key(self, address, password):
         if not address: return
         try:
             pk_list = self.wallet.get_private_key(address, password)
         except Exception as e:
+            traceback.print_exc(file=sys.stdout)
             self.show_message(str(e))
             return
-        QMessageBox.information(self, _('Private key'), _('Address')+ ': ' + address + '\n\n' + _('Private key') + ': ' + '\n'.join(pk_list), _('OK'))
+
+        d = QDialog(self)
+        d.setMinimumSize(600, 200)
+        d.setModal(1)
+        vbox = QVBoxLayout()
+        vbox.addWidget( QLabel(_("Address") + ': ' + address))
+        vbox.addWidget( QLabel(_("Private key") + ':'))
+        keys = QTextEdit()
+        keys.setReadOnly(True)
+        keys.setText('\n'.join(pk_list))
+        vbox.addWidget(keys)
+        vbox.addWidget( QRCodeWidget('\n'.join(pk_list)) )
+        vbox.addLayout(close_button(d))
+        d.setLayout(vbox)
+        d.exec_()
 
 
     @protected
@@ -1702,87 +1617,116 @@ class ElectrumWindow(QMainWindow):
         except Exception as e:
             self.show_message(str(e))
 
-    def sign_message(self, address):
-        if not address: return
+    def do_verify(self, address, message, signature):
+        message = unicode(message.toPlainText())
+        message = message.encode('utf-8')
+        if bitcoin.verify_message(address.text(), str(signature.toPlainText()), message):
+            self.show_message(_("Signature verified"))
+        else:
+            self.show_message(_("Error: wrong signature"))
+
+
+    def sign_verify_message(self, address=''):
         d = QDialog(self)
         d.setModal(1)
-        d.setWindowTitle(_('Sign Message'))
+        d.setWindowTitle(_('Sign/verify Message'))
         d.setMinimumSize(410, 290)
 
-        tab_widget = QTabWidget()
-        tab = QWidget()
-        layout = QGridLayout(tab)
-
-        sign_address = QLineEdit()
-
-        sign_address.setText(address)
-        layout.addWidget(QLabel(_('Address')), 1, 0)
-        layout.addWidget(sign_address, 1, 1)
+        layout = QGridLayout(d)
 
-        sign_message = QTextEdit()
-        layout.addWidget(QLabel(_('Message')), 2, 0)
-        layout.addWidget(sign_message, 2, 1)
+        message_e = QTextEdit()
+        layout.addWidget(QLabel(_('Message')), 1, 0)
+        layout.addWidget(message_e, 1, 1)
         layout.setRowStretch(2,3)
 
-        sign_signature = QTextEdit()
+        address_e = QLineEdit()
+        address_e.setText(address)
+        layout.addWidget(QLabel(_('Address')), 2, 0)
+        layout.addWidget(address_e, 2, 1)
+
+        signature_e = QTextEdit()
         layout.addWidget(QLabel(_('Signature')), 3, 0)
-        layout.addWidget(sign_signature, 3, 1)
+        layout.addWidget(signature_e, 3, 1)
         layout.setRowStretch(3,1)
 
-
         hbox = QHBoxLayout()
+
         b = QPushButton(_("Sign"))
+        b.clicked.connect(lambda: self.do_sign(address_e, message_e, signature_e))
         hbox.addWidget(b)
-        b.clicked.connect(lambda: self.do_sign(sign_address, sign_message, sign_signature))
+
+        b = QPushButton(_("Verify"))
+        b.clicked.connect(lambda: self.do_verify(address_e, message_e, signature_e))
+        hbox.addWidget(b)
+
         b = QPushButton(_("Close"))
         b.clicked.connect(d.accept)
         hbox.addWidget(b)
         layout.addLayout(hbox, 4, 1)
-        tab_widget.addTab(tab, _("Sign"))
+        d.exec_()
 
 
-        tab = QWidget()
-        layout = QGridLayout(tab)
+    @protected
+    def do_decrypt(self, message_e, pubkey_e, encrypted_e, password):
+        try:
+            decrypted = self.wallet.decrypt_message(str(pubkey_e.text()), str(encrypted_e.toPlainText()), password)
+            message_e.setText(decrypted)
+        except Exception as e:
+            self.show_message(str(e))
+
+
+    def do_encrypt(self, message_e, pubkey_e, encrypted_e):
+        message = unicode(message_e.toPlainText())
+        message = message.encode('utf-8')
+        try:
+            encrypted = bitcoin.encrypt_message(message, str(pubkey_e.text()))
+            encrypted_e.setText(encrypted)
+        except Exception as e:
+            self.show_message(str(e))
+
 
-        verify_address = QLineEdit()
-        layout.addWidget(QLabel(_('Address')), 1, 0)
-        layout.addWidget(verify_address, 1, 1)
 
-        verify_message = QTextEdit()
-        layout.addWidget(QLabel(_('Message')), 2, 0)
-        layout.addWidget(verify_message, 2, 1)
+    def encrypt_message(self, address = ''):
+        d = QDialog(self)
+        d.setModal(1)
+        d.setWindowTitle(_('Encrypt/decrypt Message'))
+        d.setMinimumSize(610, 490)
+
+        layout = QGridLayout(d)
+
+        message_e = QTextEdit()
+        layout.addWidget(QLabel(_('Message')), 1, 0)
+        layout.addWidget(message_e, 1, 1)
         layout.setRowStretch(2,3)
 
-        verify_signature = QTextEdit()
-        layout.addWidget(QLabel(_('Signature')), 3, 0)
-        layout.addWidget(verify_signature, 3, 1)
-        layout.setRowStretch(3,1)
+        pubkey_e = QLineEdit()
+        if address:
+            pubkey = self.wallet.getpubkeys(address)[0]
+            pubkey_e.setText(pubkey)
+        layout.addWidget(QLabel(_('Public key')), 2, 0)
+        layout.addWidget(pubkey_e, 2, 1)
 
-        def do_verify():
-            message = unicode(verify_message.toPlainText())
-            message = message.encode('utf-8')
-            if bitcoin.verify_message(verify_address.text(), str(verify_signature.toPlainText()), message):
-                self.show_message(_("Signature verified"))
-            else:
-                self.show_message(_("Error: wrong signature"))
+        encrypted_e = QTextEdit()
+        layout.addWidget(QLabel(_('Encrypted')), 3, 0)
+        layout.addWidget(encrypted_e, 3, 1)
+        layout.setRowStretch(3,1)
 
         hbox = QHBoxLayout()
-        b = QPushButton(_("Verify"))
-        b.clicked.connect(do_verify)
+        b = QPushButton(_("Encrypt"))
+        b.clicked.connect(lambda: self.do_encrypt(message_e, pubkey_e, encrypted_e))
+        hbox.addWidget(b)
+
+        b = QPushButton(_("Decrypt"))
+        b.clicked.connect(lambda: self.do_decrypt(message_e, pubkey_e, encrypted_e))
         hbox.addWidget(b)
+
         b = QPushButton(_("Close"))
         b.clicked.connect(d.accept)
         hbox.addWidget(b)
-        layout.addLayout(hbox, 4, 1)
-        tab_widget.addTab(tab, _("Verify"))
 
-        vbox = QVBoxLayout()
-        vbox.addWidget(tab_widget)
-        d.setLayout(vbox)
+        layout.addLayout(hbox, 4, 1)
         d.exec_()
 
-        
-
 
     def question(self, msg):
         return QMessageBox.question(self, _('Message'), msg, QMessageBox.Yes | QMessageBox.No, QMessageBox.No) == QMessageBox.Yes
@@ -1793,6 +1737,7 @@ class ElectrumWindow(QMainWindow):
     def password_dialog(self ):
         d = QDialog(self)
         d.setModal(1)
+        d.setWindowTitle(_("Enter Password"))
 
         pw = QLineEdit()
         pw.setEchoMode(2)
@@ -1842,7 +1787,7 @@ class ElectrumWindow(QMainWindow):
             return tx
         except Exception:
             pass
-        
+
         QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
 
 
@@ -1877,17 +1822,39 @@ class ElectrumWindow(QMainWindow):
         if tx:
             self.show_transaction(tx)
 
+    def do_process_from_txid(self):
+        from electrum import transaction
+        txid, ok = QInputDialog.getText(self, _('Lookup transaction'), _('Transaction ID') + ':')
+        if ok and txid:
+            r = self.network.synchronous_get([ ('blockchain.transaction.get',[str(txid)]) ])[0]
+            if r:
+                tx = transaction.Transaction(r)
+                if tx:
+                    self.show_transaction(tx)
+                else:
+                    self.show_message("unknown transaction")
+
     def do_process_from_csvReader(self, csvReader):
         outputs = []
+        errors = []
+        errtext = ""
         try:
-            for row in csvReader:
+            for position, row in enumerate(csvReader):
                 address = row[0]
-                amount = float(row[1])
+                if not is_valid(address):
+                    errors.append((position, address))
+                    continue
+                amount = Decimal(row[1])
                 amount = int(100000000*amount)
                 outputs.append((address, amount))
         except (ValueError, IOError, os.error), reason:
             QMessageBox.critical(None, _("Unable to read file or no transaction found"), _("Electrum was unable to open your transaction file") + "\n" + str(reason))
             return
+        if errors != []:
+            for x in errors:
+                errtext += "CSV Row " + str(x[0]+1) + ": " + x[1] + "\n"
+            QMessageBox.critical(None, _("Invalid Addresses"), _("ABORTING! Invalid Addresses found:") + "\n\n" + errtext)
+            return
 
         try:
             tx = self.wallet.make_unsigned_transaction(outputs, None, None)
@@ -1921,32 +1888,86 @@ class ElectrumWindow(QMainWindow):
 
 
     @protected
-    def do_export_privkeys(self, password):
-        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.")))
+    def export_privkeys_dialog(self, password):
+        if self.wallet.is_watching_only():
+            self.show_message(_("This is a watching-only wallet"))
+            return
 
-        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"])
+        d = QDialog(self)
+        d.setWindowTitle(_('Private keys'))
+        d.setMinimumSize(850, 300)
+        vbox = QVBoxLayout(d)
 
-                    addresses = self.wallet.addresses(True)
-                    
-                    for addr in addresses:
-                        pk = "".join(self.wallet.get_private_key(addr, password))
-                        transaction.writerow(["%34s"%addr,pk])
+        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))
+
+        e = QTextEdit()
+        e.setReadOnly(True)
+        vbox.addWidget(e)
 
-                    self.show_message(_("Private keys exported."))
+        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)
+
+        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):
@@ -1961,7 +1982,7 @@ class ElectrumWindow(QMainWindow):
             QMessageBox.information(None, _("Labels imported"), _("Your labels were imported from")+" '%s'" % str(labelsFile))
         except (IOError, os.error), reason:
             QMessageBox.critical(None, _("Unable to import labels"), _("Electrum was unable to import your labels.")+"\n" + str(reason))
-            
+
 
     def do_export_labels(self):
         labels = self.wallet.labels
@@ -1975,9 +1996,129 @@ 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):
-        from lite_window import csv_transaction
-        csv_transaction(self.wallet)
+    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:
+            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 line in lines:
+                    transaction.writerow(line)
+            else:
+                import json
+                f.write(json.dumps(lines, indent = 4))
+
+
+    def sweep_key_dialog(self):
+        d = QDialog(self)
+        d.setWindowTitle(_('Sweep private keys'))
+        d.setMinimumSize(600, 300)
+
+        vbox = QVBoxLayout(d)
+        vbox.addWidget(QLabel(_("Enter private keys")))
+
+        keys_e = QTextEdit()
+        keys_e.setTabChangesFocus(True)
+        vbox.addWidget(keys_e)
+
+        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
@@ -2000,7 +2141,7 @@ class ElectrumWindow(QMainWindow):
             except Exception as e:
                 badkeys.append(key)
                 continue
-            if not addr: 
+            if not addr:
                 badkeys.append(key)
             else:
                 addrlist.append(addr)
@@ -2029,7 +2170,7 @@ class ElectrumWindow(QMainWindow):
         grid.addWidget(HelpButton(msg), 0, 2)
         if not self.config.is_modifiable('num_zeros'):
             for w in [nz_e, nz_label]: w.setEnabled(False)
-        
+
         lang_label=QLabel(_('Language') + ':')
         grid.addWidget(lang_label, 1, 0)
         lang_combo = QComboBox()
@@ -2045,7 +2186,7 @@ class ElectrumWindow(QMainWindow):
         if not self.config.is_modifiable('language'):
             for w in [lang_combo, lang_label]: w.setEnabled(False)
 
-        
+
         fee_label = QLabel(_('Transaction fee') + ':')
         grid.addWidget(fee_label, 2, 0)
         fee_e = AmountEdit(self.base_unit)
@@ -2066,7 +2207,7 @@ class ElectrumWindow(QMainWindow):
         grid.addWidget(unit_combo, 3, 1)
         grid.addWidget(HelpButton(_('Base unit of your wallet.')\
                                              + '\n1BTC=1000mBTC.\n' \
-                                             + _(' This settings affects the fields in the Send tab')+' '), 3, 2)
+                                             + _(' These settings affects the fields in the Send tab')+' '), 3, 2)
 
         usechange_cb = QCheckBox(_('Use change addresses'))
         usechange_cb.setChecked(self.wallet.use_change)
@@ -2074,11 +2215,25 @@ 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) 
+        d.setLayout(vbox)
 
         # run the dialog
         if not d.exec_(): return
@@ -2091,7 +2246,7 @@ class ElectrumWindow(QMainWindow):
             return
 
         self.wallet.set_fee(fee)
-        
+
         nz = unicode(nz_e.text())
         try:
             nz = int( nz )
@@ -2110,21 +2265,27 @@ class ElectrumWindow(QMainWindow):
         if self.wallet.use_change != usechange_result:
             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
             self.config.set_key('decimal_point', self.decimal_point, True)
             self.update_history_tab()
             self.update_status()
-        
+
         need_restart = False
 
         lang_request = languages.keys()[lang_combo.currentIndex()]
         if lang_request != self.config.get('language'):
             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:
@@ -2137,15 +2298,17 @@ class ElectrumWindow(QMainWindow):
         NetworkDialog(self.wallet.network, self.config, self).do_exec()
 
     def closeEvent(self, event):
-        g = self.geometry()
-        self.config.set_key("winpos-qt", [g.left(),g.top(),g.width(),g.height()], True)
+        self.tray.hide()
+        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)
         event.accept()
 
 
-
     def plugins_dialog(self):
         from electrum.plugins import plugins
 
@@ -2188,7 +2351,7 @@ class ElectrumWindow(QMainWindow):
                     w = p.settings_widget(self)
                     w.setEnabled( p.is_enabled() )
                     grid.addWidget(w, i, 1)
-                else: 
+                else:
                     w = None
                 cb.clicked.connect(mk_toggle(cb,p,w))
                 grid.addWidget(HelpButton(p.description()), i, 2)
@@ -2203,30 +2366,30 @@ class ElectrumWindow(QMainWindow):
 
 
     def show_account_details(self, k):
+        account = self.wallet.accounts[k]
+
         d = QDialog(self)
         d.setWindowTitle(_('Account Details'))
         d.setModal(1)
 
         vbox = QVBoxLayout(d)
-        roots = self.wallet.get_roots(k)
-
         name = self.wallet.get_account_name(k)
         label = QLabel('Name: ' + name)
         vbox.addWidget(label)
 
-        acctype = '2 of 2' if len(roots) == 2 else '2 of 3' if len(roots) == 3 else 'Single key'
-        vbox.addWidget(QLabel('Type: ' + acctype))
+        vbox.addWidget(QLabel(_('Address type') + ': ' + account.get_type()))
 
-        label = QLabel('Derivation: ' + k)
-        vbox.addWidget(label)
+        vbox.addWidget(QLabel(_('Derivation') + ': ' + k))
+
+        vbox.addWidget(QLabel(_('Master Public Key:')))
+
+        text = QTextEdit()
+        text.setReadOnly(True)
+        text.setMaximumHeight(170)
+        vbox.addWidget(text)
 
-        #for root in roots:
-        #    mpk = self.wallet.master_public_keys[root]
-        #    text = QTextEdit()
-        #    text.setReadOnly(True)
-        #    text.setMaximumHeight(120)
-        #    text.setText(repr(mpk))
-        #    vbox.addWidget(text)
+        mpk_text = '\n'.join( account.get_master_pubkeys() )
+        text.setText(mpk_text)
 
         vbox.addLayout(close_button(d))
         d.exec_()