electrum/lib/gui.py

#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2011 thomasv@gitorious
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

import datetime
import thread, time, ast, sys, re
import socket, traceback
import pygtk
pygtk.require('2.0')
import gtk, gobject
from electrum import pyqrnative
from decimal import Decimal

gtk.gdk.threads_init()
APP_NAME = "Electrum"
import platform
MONOSPACE_FONT = 'Lucida Console' if platform.system() == 'Windows' else 'monospace'

from wallet import format_satoshis
from interface import DEFAULT_SERVERS

def numbify(entry, is_int = False):
    text = entry.get_text().strip()
    chars = '0123456789'
    if not is_int: chars +='.'
    s = ''.join([i for i in text if i in chars])
    if not is_int:
        if '.' in s:
            p = s.find('.')
            s = s.replace('.','')
            s = s[:p] + '.' + s[p:p+8]
        try:
            amount = int( Decimal(s) * 100000000 )
        except:
            amount = None
    else:
        try:
            amount = int( s )
        except:
            amount = None
    entry.set_text(s)
    return amount




def show_seed_dialog(wallet, password, parent):
    from electrum import mnemonic
    try:
        seed = wallet.pw_decode( wallet.seed, password)
    except:
        show_message("Incorrect password")
        return
    dialog = gtk.MessageDialog(
        parent = parent,
        flags = gtk.DIALOG_MODAL, 
        buttons = gtk.BUTTONS_OK, 
        message_format = "Your wallet generation seed is:\n\n" + seed \
            + "\n\nPlease keep it in a safe place; if you lose it, you will not be able to restore your wallet.\n\n" \
            + "Equivalently, your wallet seed can be stored and recovered with the following mnemonic code:\n\n\"" + ' '.join(mnemonic.mn_encode(seed)) + "\"" )
    dialog.set_title("Seed")
    dialog.show()
    dialog.run()
    dialog.destroy()

def restore_create_dialog(wallet):

    # ask if the user wants to create a new wallet, or recover from a seed. 
    # if he wants to recover, and nothing is found, do not create wallet
    dialog = gtk.Dialog("electrum", parent=None, 
                        flags=gtk.DIALOG_MODAL|gtk.DIALOG_NO_SEPARATOR, 
                        buttons= ("create", 0, "restore",1, "cancel",2)  )

    label = gtk.Label("Wallet file not found.\nDo you want to create a new wallet,\n or to restore an existing one?"  )
    label.show()
    dialog.vbox.pack_start(label)
    dialog.show()
    r = dialog.run()
    dialog.destroy()

    if r==2: return False
        
    is_recovery = (r==1)

    # ask for the server.
    if not run_network_dialog( wallet, parent=None ): return False

    if not is_recovery:

        wallet.new_seed(None)
        # generate first key
        wallet.init_mpk( wallet.seed )
        wallet.up_to_date_event.clear()
        wallet.update()

        # run a dialog indicating the seed, ask the user to remember it
        show_seed_dialog(wallet, None, None)
            
        #ask for password
        change_password_dialog(wallet, None, None)
    else:
        # ask for seed and gap.
        run_recovery_dialog( wallet )

        dialog = gtk.MessageDialog(
            parent = None,
            flags = gtk.DIALOG_MODAL, 
            buttons = gtk.BUTTONS_CANCEL, 
            message_format = "Please wait..."  )
        dialog.show()

        def recover_thread( wallet, dialog ):
            wallet.init_mpk( wallet.seed ) # not encrypted at this point
            wallet.up_to_date_event.clear()
            wallet.update()

            if wallet.is_found():
                # history and addressbook
                wallet.update_tx_history()
                wallet.fill_addressbook()
                print "recovery successful"

            gobject.idle_add( dialog.destroy )

        thread.start_new_thread( recover_thread, ( wallet, dialog ) )
        r = dialog.run()
        dialog.destroy()
        if r==gtk.RESPONSE_CANCEL: return False
        if not wallet.is_found:
            show_message("No transactions found for this seed")

    wallet.save()
    return True


def run_recovery_dialog(wallet):
    message = "Please enter your wallet seed or the corresponding mnemonic list of words, and the gap limit of your wallet."
    dialog = gtk.MessageDialog(
        parent = None,
        flags = gtk.DIALOG_MODAL, 
        buttons = gtk.BUTTONS_OK_CANCEL,
        message_format = message)

    vbox = dialog.vbox
    dialog.set_default_response(gtk.RESPONSE_OK)

    # ask seed, server and gap in the same dialog
    seed_box = gtk.HBox()
    seed_label = gtk.Label('Seed or mnemonic:')
    seed_label.set_size_request(150,-1)
    seed_box.pack_start(seed_label, False, False, 10)
    seed_label.show()
    seed_entry = gtk.Entry()
    seed_entry.show()
    seed_entry.set_size_request(450,-1)
    seed_box.pack_start(seed_entry, False, False, 10)
    add_help_button(seed_box, '.')
    seed_box.show()
    vbox.pack_start(seed_box, False, False, 5)    

    gap = gtk.HBox()
    gap_label = gtk.Label('Gap limit:')
    gap_label.set_size_request(150,10)
    gap_label.show()
    gap.pack_start(gap_label,False, False, 10)
    gap_entry = gtk.Entry()
    gap_entry.set_text("%d"%wallet.gap_limit)
    gap_entry.connect('changed', numbify, True)
    gap_entry.show()
    gap.pack_start(gap_entry,False,False, 10)
    add_help_button(gap, 'The maximum gap that is allowed between unused addresses in your wallet. During wallet recovery, this parameter is used to decide when to stop the recovery process. If you increase this value, you will need to remember it in order to be able to recover your wallet from seed.')
    gap.show()
    vbox.pack_start(gap, False,False, 5)

    dialog.show()
    r = dialog.run()
    gap = gap_entry.get_text()        
    seed = seed_entry.get_text()
    dialog.destroy()

    if r==gtk.RESPONSE_CANCEL:
        sys.exit(1)
    try:
        gap = int(gap)
    except:
        show_message("error")
        sys.exit(1)

    try:
        seed.decode('hex')
    except:
        from electrum import mnemonic
        print "not hex, trying decode"
        seed = mnemonic.mn_decode( seed.split(' ') )
    if not seed:
        show_message("no seed")
        sys.exit(1)
        
    wallet.seed = seed
    wallet.gap_limit = gap
    wallet.save()



def run_settings_dialog(wallet, parent):

    message = "Here are the settings of your wallet. For more explanations, click on the question mark buttons next to each input field."
        
    dialog = gtk.MessageDialog(
        parent = parent,
        flags = gtk.DIALOG_MODAL, 
        buttons = gtk.BUTTONS_OK_CANCEL,
        message_format = message)

    image = gtk.Image()
    image.set_from_stock(gtk.STOCK_PREFERENCES, gtk.ICON_SIZE_DIALOG)
    image.show()
    dialog.set_image(image)
    dialog.set_title("Settings")

    vbox = dialog.vbox
    dialog.set_default_response(gtk.RESPONSE_OK)

    fee = gtk.HBox()
    fee_entry = gtk.Entry()
    fee_label = gtk.Label('Transaction fee:')
    fee_label.set_size_request(150,10)
    fee_label.show()
    fee.pack_start(fee_label,False, False, 10)
    fee_entry.set_text( str( Decimal(wallet.fee) /100000000 ) )
    fee_entry.connect('changed', numbify, False)
    fee_entry.show()
    fee.pack_start(fee_entry,False,False, 10)
    add_help_button(fee, 'Fee per transaction input. Transactions involving multiple inputs tend to have a higher fee. Recommended value:0.0005')
    fee.show()
    vbox.pack_start(fee, False,False, 5)
            
    nz = gtk.HBox()
    nz_entry = gtk.Entry()
    nz_label = gtk.Label('Display zeros:')
    nz_label.set_size_request(150,10)
    nz_label.show()
    nz.pack_start(nz_label,False, False, 10)
    nz_entry.set_text( str( wallet.num_zeros ))
    nz_entry.connect('changed', numbify, True)
    nz_entry.show()
    nz.pack_start(nz_entry,False,False, 10)
    add_help_button(nz, "Number of zeros displayed after the decimal point.\nFor example, if this number is 2, then '5.' is displayed as '5.00'")
    nz.show()
    vbox.pack_start(nz, False,False, 5)
            
    dialog.show()
    r = dialog.run()
    fee = fee_entry.get_text()
    nz = nz_entry.get_text()
        
    dialog.destroy()
    if r==gtk.RESPONSE_CANCEL:
        return

    try:
        fee = int( 100000000 * Decimal(fee) )
    except:
        show_message("error")
        return
    if wallet.fee != fee:
        wallet.fee = fee
        wallet.save()

    try:
        nz = int( nz )
        if nz>8: nz = 8
    except:
        show_message("error")
        return
    if wallet.num_zeros != nz:
        wallet.num_zeros = nz
        wallet.save()




def run_network_dialog( wallet, parent ):
    image = gtk.Image()
    image.set_from_stock(gtk.STOCK_NETWORK, gtk.ICON_SIZE_DIALOG)
    interface = wallet.interface
    if parent:
        if interface.is_connected:
            status = "Connected to %s:%d\n%d blocks"%(interface.host, interface.port, wallet.blocks)
        else:
            status = "Not connected"
        server = wallet.server
    else:
        import random
        status = "Please choose a server."
        server = random.choice( DEFAULT_SERVERS )

    if not wallet.interface.servers:
        servers_list = []
        for x in DEFAULT_SERVERS:
            h,port,protocol = x.split(':')
            servers_list.append( (h,[(protocol,port)] ) )
    else:
        servers_list = wallet.interface.servers

    plist = {}
    for item in servers_list:
        host, pp = item
        z = {}
        for item2 in pp:
            protocol, port = item2
            z[protocol] = port
        plist[host] = z

    dialog = gtk.MessageDialog( parent, gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
                                    gtk.MESSAGE_QUESTION, gtk.BUTTONS_OK_CANCEL, status)
    dialog.set_title("Server")
    dialog.set_image(image)
    image.show()
    
    vbox = dialog.vbox
    host_box = gtk.HBox()
    host_label = gtk.Label('Connect to:')
    host_label.set_size_request(100,-1)
    host_label.show()
    host_box.pack_start(host_label, False, False, 10)
    host_entry = gtk.Entry()
    host_entry.set_size_request(200,-1)
    host_entry.set_text(server)
    host_entry.show()
    host_box.pack_start(host_entry, False, False, 10)
    add_help_button(host_box, 'The name and port number of your Electrum server, separated by a colon. Example: "ecdsa.org:50000". If no port number is provided, port 50000 will be tried. Some servers allow you to connect through http (port 80) or https (port 443)')
    host_box.show()


    p_box = gtk.HBox(False, 10)
    p_box.show()

    p_label = gtk.Label('Protocol:')
    p_label.set_size_request(100,-1)
    p_label.show()
    p_box.pack_start(p_label, False, False, 10)

    radio1 = gtk.RadioButton(None, "tcp")
    p_box.pack_start(radio1, True, True, 0)
    radio1.show()
    radio2 = gtk.RadioButton(radio1, "http")
    p_box.pack_start(radio2, True, True, 0)
    radio2.show()

    def current_line():
        return unicode(host_entry.get_text()).split(':')
    
    def set_button(protocol):
        if protocol == 't':
            radio1.set_active(1)
        elif protocol == 'h':
            radio2.set_active(1)

    def set_protocol(protocol):
        host = current_line()[0]
        pp = plist[host]
        if protocol not in pp.keys():
            protocol = pp.keys()[0]
            set_button(protocol)
        port = pp[protocol]
        host_entry.set_text( host + ':' + port + ':' + protocol)

    radio1.connect("toggled", lambda x,y:set_protocol('t'), "radio button 1")
    radio2.connect("toggled", lambda x,y:set_protocol('h'), "radio button 1")
        
    server_list = gtk.ListStore(str)
    for host in plist.keys():
        server_list.append([host])
    
    treeview = gtk.TreeView(model=server_list)
    treeview.show()

    if wallet.interface.servers:
        label = 'Active Servers'
    else:
        label = 'Default Servers'
        
    tvcolumn = gtk.TreeViewColumn(label)
    treeview.append_column(tvcolumn)
    cell = gtk.CellRendererText()
    tvcolumn.pack_start(cell, False)
    tvcolumn.add_attribute(cell, 'text', 0)

    scroll = gtk.ScrolledWindow()
    scroll.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
    scroll.add(treeview)
    scroll.show()

    vbox.pack_start(host_box, False,False, 5)
    vbox.pack_start(p_box, True, True, 0)
    vbox.pack_start(scroll)

    def my_treeview_cb(treeview):
        path, view_column = treeview.get_cursor()
        host = server_list.get_value( server_list.get_iter(path), 0)

        pp = plist[host]
        if 't' in pp.keys():
            protocol = 't'
        else:
            protocol = pp.keys()[0]
        port = pp[protocol]
        host_entry.set_text( host + ':' + port + ':' + protocol)
        set_button(protocol)

    treeview.connect('cursor-changed', my_treeview_cb)

    dialog.show()
    r = dialog.run()
    server = host_entry.get_text()
    dialog.destroy()

    if r==gtk.RESPONSE_CANCEL:
        return False

    try:
        wallet.set_server(server)
    except:
        show_message("error:" + server)
        return False

    if parent:
        wallet.save()
    return True



def show_message(message, parent=None):
    dialog = gtk.MessageDialog(
        parent = parent,
        flags = gtk.DIALOG_MODAL, 
        buttons = gtk.BUTTONS_CLOSE, 
        message_format = message )
    dialog.show()
    dialog.run()
    dialog.destroy()

def password_line(label):
    password = gtk.HBox()
    password_label = gtk.Label(label)
    password_label.set_size_request(120,10)
    password_label.show()
    password.pack_start(password_label,False, False, 10)
    password_entry = gtk.Entry()
    password_entry.set_size_request(300,-1)
    password_entry.set_visibility(False)
    password_entry.show()
    password.pack_start(password_entry,False,False, 10)
    password.show()
    return password, password_entry

def password_dialog(parent):
    dialog = gtk.MessageDialog( parent, gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
                                gtk.MESSAGE_QUESTION, gtk.BUTTONS_OK_CANCEL,  "Please enter your password.")
    dialog.get_image().set_visible(False)
    current_pw, current_pw_entry = password_line('Password:')
    current_pw_entry.connect("activate", lambda entry, dialog, response: dialog.response(response), dialog, gtk.RESPONSE_OK)
    dialog.vbox.pack_start(current_pw, False, True, 0)
    dialog.show()
    result = dialog.run()
    pw = current_pw_entry.get_text()
    dialog.destroy()
    if result != gtk.RESPONSE_CANCEL: return pw

def change_password_dialog(wallet, parent, icon):
    if parent:
        msg = 'Your wallet is encrypted. Use this dialog to change the password. To disable wallet encryption, enter an empty new password.' if wallet.use_encryption else 'Your wallet keys are not encrypted'
    else:
        msg = "Please choose a password to encrypt your wallet keys"

    dialog = gtk.MessageDialog( parent, gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_QUESTION, gtk.BUTTONS_OK_CANCEL, msg)
    dialog.set_title("Change password")
    image = gtk.Image()
    image.set_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_DIALOG)
    image.show()
    dialog.set_image(image)

    if wallet.use_encryption:
        current_pw, current_pw_entry = password_line('Current password:')
        dialog.vbox.pack_start(current_pw, False, True, 0)

    password, password_entry = password_line('New password:')
    dialog.vbox.pack_start(password, False, True, 5)
    password2, password2_entry = password_line('Confirm password:')
    dialog.vbox.pack_start(password2, False, True, 5)

    dialog.show()
    result = dialog.run()
    password = current_pw_entry.get_text() if wallet.use_encryption else None
    new_password = password_entry.get_text()
    new_password2 = password2_entry.get_text()
    dialog.destroy()
    if result == gtk.RESPONSE_CANCEL: 
        return

    try:
        seed = wallet.pw_decode( wallet.seed, password)
    except:
        show_message("Incorrect password")
        return

    if new_password != new_password2:
        show_message("passwords do not match")
        return

    wallet.update_password(seed, new_password)

    if icon:
        if wallet.use_encryption:
            icon.set_tooltip_text('wallet is encrypted')
        else:
            icon.set_tooltip_text('wallet is unencrypted')


def add_help_button(hbox, message):
    button = gtk.Button('?')
    button.connect("clicked", lambda x: show_message(message))
    button.show()
    hbox.pack_start(button,False, False)


class MyWindow(gtk.Window): __gsignals__ = dict( mykeypress = (gobject.SIGNAL_RUN_LAST | gobject.SIGNAL_ACTION, None, (str,)) )

gobject.type_register(MyWindow)
gtk.binding_entry_add_signal(MyWindow, gtk.keysyms.W, gtk.gdk.CONTROL_MASK, 'mykeypress', str, 'ctrl+W')
gtk.binding_entry_add_signal(MyWindow, gtk.keysyms.Q, gtk.gdk.CONTROL_MASK, 'mykeypress', str, 'ctrl+Q')


class ElectrumWindow:

    def show_message(self, msg):
        show_message(msg, self.window)

    def __init__(self, wallet):
        self.wallet = wallet
        self.funds_error = False # True if not enough funds

        self.window = MyWindow(gtk.WINDOW_TOPLEVEL)
        self.window.set_title(APP_NAME + " " + self.wallet.electrum_version)
        self.window.connect("destroy", gtk.main_quit)
        self.window.set_border_width(0)
        self.window.connect('mykeypress', gtk.main_quit)
        self.window.set_default_size(720, 350)

        vbox = gtk.VBox()

        self.notebook = gtk.Notebook()
        self.create_history_tab()
        self.create_send_tab()
        self.create_recv_tab()
        self.create_book_tab()
        self.create_about_tab()
        self.notebook.show()
        vbox.pack_start(self.notebook, True, True, 2)
        
        self.status_bar = gtk.Statusbar()
        vbox.pack_start(self.status_bar, False, False, 0)

        self.status_image = gtk.Image()
        self.status_image.set_from_stock(gtk.STOCK_NO, gtk.ICON_SIZE_MENU)
        self.status_image.set_alignment(True, 0.5  )
        self.status_image.show()

        self.network_button = gtk.Button()
        self.network_button.connect("clicked", lambda x: run_network_dialog(self.wallet, self.window) )
        self.network_button.add(self.status_image)
        self.network_button.set_relief(gtk.RELIEF_NONE)
        self.network_button.show()
        self.status_bar.pack_end(self.network_button, False, False)

        def seedb(w, wallet):
            if wallet.use_encryption:
                password = password_dialog(self.window)
                if not password: return
            else: password = None
            show_seed_dialog(wallet, password, self.window)
        button = gtk.Button('S')
        button.connect("clicked", seedb, wallet )
        button.set_relief(gtk.RELIEF_NONE)
        button.show()
        self.status_bar.pack_end(button,False, False)

        settings_icon = gtk.Image()
        settings_icon.set_from_stock(gtk.STOCK_PREFERENCES, gtk.ICON_SIZE_MENU)
        settings_icon.set_alignment(0.5, 0.5)
        settings_icon.set_size_request(16,16 )
        settings_icon.show()

        prefs_button = gtk.Button()
        prefs_button.connect("clicked", lambda x: run_settings_dialog(self.wallet, self.window) )
        prefs_button.add(settings_icon)
        prefs_button.set_tooltip_text("Settings")
        prefs_button.set_relief(gtk.RELIEF_NONE)
        prefs_button.show()
        self.status_bar.pack_end(prefs_button,False,False)

        pw_icon = gtk.Image()
        pw_icon.set_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU)
        pw_icon.set_alignment(0.5, 0.5)
        pw_icon.set_size_request(16,16 )
        pw_icon.show()

        password_button = gtk.Button()
        password_button.connect("clicked", lambda x: change_password_dialog(self.wallet, self.window, pw_icon))
        password_button.add(pw_icon)
        password_button.set_relief(gtk.RELIEF_NONE)
        password_button.show()
        self.status_bar.pack_end(password_button,False,False)

        self.window.add(vbox)
        self.window.show_all()
        #self.fee_box.hide()

        self.context_id = self.status_bar.get_context_id("statusbar")
        self.update_status_bar()

        def update_status_bar_thread():
            while True:
                gobject.idle_add( self.update_status_bar )
                time.sleep(0.5)


        def check_recipient_thread():
            old_r = ''
            while True:
                time.sleep(0.5)
                if self.payto_entry.is_focus():
                    continue
                r = self.payto_entry.get_text()
                if r != old_r:
                    old_r = r
                    r = r.strip()
                    if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', r):
                        try:
                            to_address = self.wallet.get_alias(r, interactive=False)
                        except:
                            continue
                        if to_address:
                            s = r + ' <' + to_address + '>'
                            gobject.idle_add( lambda: self.payto_entry.set_text(s) )
                

        thread.start_new_thread(update_status_bar_thread, ())
        thread.start_new_thread(check_recipient_thread, ())
        self.notebook.set_current_page(0)


    def add_tab(self, page, name):
        tab_label = gtk.Label(name)
        tab_label.show()
        self.notebook.append_page(page, tab_label)


    def create_send_tab(self):
        
        page = vbox = gtk.VBox()
        page.show()

        payto = gtk.HBox()
        payto_label = gtk.Label('Pay to:')
        payto_label.set_size_request(100,-1)
        payto.pack_start(payto_label, False)
        payto_entry = gtk.Entry()
        payto_entry.set_size_request(450, 26)
        payto.pack_start(payto_entry, False)
        vbox.pack_start(payto, False, False, 5)

        message = gtk.HBox()
        message_label = gtk.Label('Description:')
        message_label.set_size_request(100,-1)
        message.pack_start(message_label, False)
        message_entry = gtk.Entry()
        message_entry.set_size_request(450, 26)
        message.pack_start(message_entry, False)
        vbox.pack_start(message, False, False, 5)

        amount_box = gtk.HBox()
        amount_label = gtk.Label('Amount:')
        amount_label.set_size_request(100,-1)
        amount_box.pack_start(amount_label, False)
        amount_entry = gtk.Entry()
        amount_entry.set_size_request(120, -1)
        amount_box.pack_start(amount_entry, False)
        vbox.pack_start(amount_box, False, False, 5)

        self.fee_box = fee_box = gtk.HBox()
        fee_label = gtk.Label('Fee:')
        fee_label.set_size_request(100,-1)
        fee_box.pack_start(fee_label, False)
        fee_entry = gtk.Entry()
        fee_entry.set_size_request(60, 26)
        fee_box.pack_start(fee_entry, False)
        vbox.pack_start(fee_box, False, False, 5)

        end_box = gtk.HBox()
        empty_label = gtk.Label('')
        empty_label.set_size_request(100,-1)
        end_box.pack_start(empty_label, False)
        send_button = gtk.Button("Send")
        send_button.show()
        end_box.pack_start(send_button, False, False, 0)
        clear_button = gtk.Button("Clear")
        clear_button.show()
        end_box.pack_start(clear_button, False, False, 15)
        send_button.connect("clicked", self.do_send, (payto_entry, message_entry, amount_entry, fee_entry))
        clear_button.connect("clicked", self.do_clear, (payto_entry, message_entry, amount_entry, fee_entry))

        vbox.pack_start(end_box, False, False, 5)

        # display this line only if there is a signature
        payto_sig = gtk.HBox()
        payto_sig_id = gtk.Label('')
        payto_sig.pack_start(payto_sig_id, False)
        vbox.pack_start(payto_sig, True, True, 5)
        

        self.user_fee = False

        def entry_changed( entry, is_fee ):
            self.funds_error = False
            amount = numbify(amount_entry)
            fee = numbify(fee_entry)
            if not is_fee: fee = None
            if amount is None:
                return
            inputs, total, fee = self.wallet.choose_tx_inputs( amount, fee )
            if not is_fee:
                fee_entry.set_text( str( Decimal( fee ) / 100000000 ) )
                self.fee_box.show()
            if inputs:
                amount_entry.modify_text(gtk.STATE_NORMAL, gtk.gdk.color_parse("#000000"))
                fee_entry.modify_text(gtk.STATE_NORMAL, gtk.gdk.color_parse("#000000"))
                send_button.set_sensitive(True)
            else:
                send_button.set_sensitive(False)
                amount_entry.modify_text(gtk.STATE_NORMAL, gtk.gdk.color_parse("#cc0000"))
                fee_entry.modify_text(gtk.STATE_NORMAL, gtk.gdk.color_parse("#cc0000"))
                self.funds_error = True

        amount_entry.connect('changed', entry_changed, False)
        fee_entry.connect('changed', entry_changed, True)        

        self.payto_entry = payto_entry
        self.payto_fee_entry = fee_entry
        self.payto_sig_id = payto_sig_id
        self.payto_sig = payto_sig
        self.amount_entry = amount_entry
        self.message_entry = message_entry
        self.add_tab(page, 'Send')

    def set_frozen(self,entry,frozen):
        if frozen:
            entry.set_editable(False)
            entry.set_has_frame(False)
            entry.modify_base(gtk.STATE_NORMAL, gtk.gdk.color_parse("#eeeeee"))
        else:
            entry.set_editable(True)
            entry.set_has_frame(True)
            entry.modify_base(gtk.STATE_NORMAL, gtk.gdk.color_parse("#ffffff"))

    def set_url(self, url):
        payto, amount, label, message, signature, identity, url = self.wallet.parse_url(url, self.show_message, self.question)
        self.notebook.set_current_page(1)
        self.payto_entry.set_text(payto)
        self.message_entry.set_text(message)
        self.amount_entry.set_text(amount)
        if identity:
            self.set_frozen(self.payto_entry,True)
            self.set_frozen(self.amount_entry,True)
            self.set_frozen(self.message_entry,True)
            self.payto_sig_id.set_text( '      The bitcoin URI was signed by ' + identity )
        else:
            self.payto_sig.set_visible(False)

    def create_about_tab(self):
        import pango
        page = gtk.VBox()
        page.show()
        tv = gtk.TextView()
        tv.set_editable(False)
        tv.set_cursor_visible(False)
        tv.modify_font(pango.FontDescription(MONOSPACE_FONT))
        page.pack_start(tv)
        self.info = tv.get_buffer()
        self.add_tab(page, 'Wall')

    def do_clear(self, w, data):
        self.payto_sig.set_visible(False)
        self.payto_fee_entry.set_text('')
        for entry in [self.payto_entry,self.amount_entry,self.message_entry]:
            self.set_frozen(entry,False)
            entry.set_text('')

    def question(self,msg):
        dialog = gtk.MessageDialog( self.window, gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_QUESTION, gtk.BUTTONS_OK_CANCEL, msg)
        dialog.show()
        result = dialog.run()
        dialog.destroy()
        return result == gtk.RESPONSE_OK

    def do_send(self, w, data):
        payto_entry, label_entry, amount_entry, fee_entry = data
        label = label_entry.get_text()
        r = payto_entry.get_text()
        r = r.strip()

        m1 = re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', r)
        m2 = re.match('(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+) \<([1-9A-HJ-NP-Za-km-z]{26,})\>', r)
        
        if m1:
            to_address = self.wallet.get_alias(r, True, self.show_message, self.question)
            if not to_address:
                return
            else:
                self.update_sending_tab()

        elif m2:
            to_address = m2.group(5)
        else:
            to_address = r

        if not self.wallet.is_valid(to_address):
            self.show_message( "invalid bitcoin address:\n"+to_address)
            return

        try:
            amount = int( Decimal(amount_entry.get_text()) * 100000000 )
        except:
            self.show_message( "invalid amount")
            return
        try:
            fee = int( Decimal(fee_entry.get_text()) * 100000000 )
        except:
            self.show_message( "invalid fee")
            return

        if self.wallet.use_encryption:
            password = password_dialog(self.window)
            if not password:
                return
        else:
            password = None

        try:
            tx = self.wallet.mktx( to_address, amount, label, password, fee )
        except BaseException, e:
            self.show_message(e.message)
            return
            
        status, msg = self.wallet.sendtx( tx )
        if status:
            self.show_message( "payment sent.\n" + msg )
            payto_entry.set_text("")
            label_entry.set_text("")
            amount_entry.set_text("")
            fee_entry.set_text("")
            #self.fee_box.hide()
            self.update_sending_tab()
        else:
            self.show_message( msg )


    def treeview_button_press(self, treeview, event):
        if event.type == gtk.gdk._2BUTTON_PRESS:
            c = treeview.get_cursor()[0]
            if treeview == self.history_treeview:
                tx_details = self.history_list.get_value( self.history_list.get_iter(c), 8)
                self.show_message(tx_details)
            elif treeview == self.contacts_treeview:
                m = self.addressbook_list.get_value( self.addressbook_list.get_iter(c), 0)
                a = self.wallet.aliases.get(m)
                if a:
                    if a[0] in self.wallet.authorities.keys():
                        s = self.wallet.authorities.get(a[0])
                    else:
                        s = "self-signed"
                    msg = 'Alias: '+ m + '\nTarget address: '+ a[1] + '\n\nSigned by: ' + s + '\nSigning address:' + a[0]
                    self.show_message(msg)
            

    def treeview_key_press(self, treeview, event):
        c = treeview.get_cursor()[0]
        if event.keyval == gtk.keysyms.Up:
            if c and c[0] == 0:
                treeview.parent.grab_focus()
                treeview.set_cursor((0,))
        elif event.keyval == gtk.keysyms.Return:
            if treeview == self.history_treeview:
                tx_details = self.history_list.get_value( self.history_list.get_iter(c), 8)
                self.show_message(tx_details)
            elif treeview == self.contacts_treeview:
                m = self.addressbook_list.get_value( self.addressbook_list.get_iter(c), 0)
                a = self.wallet.aliases.get(m)
                if a:
                    if a[0] in self.wallet.authorities.keys():
                        s = self.wallet.authorities.get(a[0])
                    else:
                        s = "self"
                    msg = 'Alias:'+ m + '\n\nTarget: '+ a[1] + '\nSigned by: ' + s + '\nSigning address:' + a[0]
                    self.show_message(msg)

        return False

    def create_history_tab(self):

        self.history_list = gtk.ListStore(str, str, str, str, 'gboolean',  str, str, str, str)
        treeview = gtk.TreeView(model=self.history_list)
        self.history_treeview = treeview
        treeview.set_tooltip_column(7)
        treeview.show()
        treeview.connect('key-press-event', self.treeview_key_press)
        treeview.connect('button-press-event', self.treeview_button_press)

        tvcolumn = gtk.TreeViewColumn('')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererPixbuf()
        tvcolumn.pack_start(cell, False)
        tvcolumn.set_attributes(cell, stock_id=1)

        tvcolumn = gtk.TreeViewColumn('Date')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        tvcolumn.pack_start(cell, False)
        tvcolumn.add_attribute(cell, 'text', 2)

        tvcolumn = gtk.TreeViewColumn('Description')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        cell.set_property('foreground', 'grey')
        cell.set_property('family', MONOSPACE_FONT)
        cell.set_property('editable', True)
        def edited_cb(cell, path, new_text, h_list):
            tx = h_list.get_value( h_list.get_iter(path), 0)
            self.wallet.labels[tx] = new_text
            self.wallet.save() 
            self.update_history_tab()
        cell.connect('edited', edited_cb, self.history_list)
        def editing_started(cell, entry, path, h_list):
            tx = h_list.get_value( h_list.get_iter(path), 0)
            if not self.wallet.labels.get(tx): entry.set_text('')
        cell.connect('editing-started', editing_started, self.history_list)
        tvcolumn.set_expand(True)
        tvcolumn.pack_start(cell, True)
        tvcolumn.set_attributes(cell, text=3, foreground_set = 4)

        tvcolumn = gtk.TreeViewColumn('Amount')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        cell.set_alignment(1, 0.5)
        cell.set_property('family', MONOSPACE_FONT)
        tvcolumn.pack_start(cell, False)
        tvcolumn.add_attribute(cell, 'text', 5)

        tvcolumn = gtk.TreeViewColumn('Balance')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        cell.set_alignment(1, 0.5)
        cell.set_property('family', MONOSPACE_FONT)
        tvcolumn.pack_start(cell, False)
        tvcolumn.add_attribute(cell, 'text', 6)

        tvcolumn = gtk.TreeViewColumn('Tooltip')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        tvcolumn.pack_start(cell, False)
        tvcolumn.add_attribute(cell, 'text', 7)
        tvcolumn.set_visible(False)

        scroll = gtk.ScrolledWindow()
        scroll.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
        scroll.add(treeview)

        self.add_tab(scroll, 'History')
        self.update_history_tab()


    def create_recv_tab(self):
        self.recv_list = gtk.ListStore(str, str, str)
        self.add_tab( self.make_address_list(True), 'Receive')
        self.update_receiving_tab()

    def create_book_tab(self):
        self.addressbook_list = gtk.ListStore(str, str, str)
        self.add_tab( self.make_address_list(False), 'Contacts')
        self.update_sending_tab()

    def make_address_list(self, is_recv):
        liststore = self.recv_list if is_recv else self.addressbook_list
        treeview = gtk.TreeView(model= liststore)
        treeview.connect('key-press-event', self.treeview_key_press)
        treeview.connect('button-press-event', self.treeview_button_press)
        treeview.show()
        if not is_recv:
            self.contacts_treeview = treeview

        tvcolumn = gtk.TreeViewColumn('Address')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        cell.set_property('family', MONOSPACE_FONT)
        tvcolumn.pack_start(cell, True)
        tvcolumn.add_attribute(cell, 'text', 0)

        tvcolumn = gtk.TreeViewColumn('Label')
        tvcolumn.set_expand(True)
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        cell.set_property('editable', True)
        def edited_cb2(cell, path, new_text, liststore):
            address = liststore.get_value( liststore.get_iter(path), 0)
            self.wallet.labels[address] = new_text
            self.wallet.save() 
            self.wallet.update_tx_labels()
            self.update_receiving_tab()
            self.update_sending_tab()
            self.update_history_tab()
        cell.connect('edited', edited_cb2, liststore)
        tvcolumn.pack_start(cell, True)
        tvcolumn.add_attribute(cell, 'text', 1)

        tvcolumn = gtk.TreeViewColumn('Tx')
        treeview.append_column(tvcolumn)
        cell = gtk.CellRendererText()
        tvcolumn.pack_start(cell, True)
        tvcolumn.add_attribute(cell, 'text', 2)

        scroll = gtk.ScrolledWindow()
        scroll.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
        scroll.add(treeview)

        hbox = gtk.HBox()
        if not is_recv:
            button = gtk.Button("New")
            button.connect("clicked", self.newaddress_dialog)
            button.show()
            hbox.pack_start(button,False)

        def showqrcode(w, treeview, liststore):
            path, col = treeview.get_cursor()
            if not path: return
            address = liststore.get_value(liststore.get_iter(path), 0)
            qr = pyqrnative.QRCode(4, pyqrnative.QRErrorCorrectLevel.H)
            qr.addData(address)
            qr.make()
            boxsize = 7
            size = qr.getModuleCount()*boxsize
            def area_expose_cb(area, event):
                style = area.get_style()
                k = qr.getModuleCount()
                for r in range(k):
                    for c in range(k):
                        gc = style.black_gc if qr.isDark(r, c) else style.white_gc
                        area.window.draw_rectangle(gc, True, c*boxsize, r*boxsize, boxsize, boxsize)
            area = gtk.DrawingArea()
            area.set_size_request(size, size)
            area.connect("expose-event", area_expose_cb)
            area.show()
            dialog = gtk.Dialog(address, parent=self.window, flags=gtk.DIALOG_MODAL|gtk.DIALOG_NO_SEPARATOR, buttons = ("ok",1))
            dialog.vbox.add(area)
            dialog.run()
            dialog.destroy()

        button = gtk.Button("QR")
        button.connect("clicked", showqrcode, treeview, liststore)
        button.show()
        hbox.pack_start(button,False)

        button = gtk.Button("Copy to clipboard")
        def copy2clipboard(w, treeview, liststore):
            import platform
            path, col =  treeview.get_cursor()
            if path:
                address =  liststore.get_value( liststore.get_iter(path), 0)
                if platform.system() == 'Windows':
                    from Tkinter import Tk
                    r = Tk()
                    r.withdraw()
                    r.clipboard_clear()
                    r.clipboard_append( address )
                    r.destroy()
                else:
                    c = gtk.clipboard_get()
                    c.set_text( address )
        button.connect("clicked", copy2clipboard, treeview, liststore)
        button.show()
        hbox.pack_start(button,False)

        if not is_recv:
            button = gtk.Button("Pay to")
            def payto(w, treeview, liststore):
                path, col =  treeview.get_cursor()
                if path:
                    address =  liststore.get_value( liststore.get_iter(path), 0)
                    self.payto_entry.set_text( address )
                    self.notebook.set_current_page(1)
                    self.amount_entry.grab_focus()

            button.connect("clicked", payto, treeview, liststore)
            button.show()
            hbox.pack_start(button,False)

        vbox = gtk.VBox()
        vbox.pack_start(scroll,True)
        vbox.pack_start(hbox, False)
        return vbox

    def update_status_bar(self):
        interface = self.wallet.interface
        if self.funds_error:
            text = "Not enough funds"
        elif interface.is_connected:
            self.network_button.set_tooltip_text("Connected to %s:%d.\n%d blocks"%(interface.host, interface.port, self.wallet.blocks))
            if self.wallet.blocks == -1:
                self.status_image.set_from_stock(gtk.STOCK_NO, gtk.ICON_SIZE_MENU)
                text = "Connecting..."
            elif self.wallet.blocks == 0:
                self.status_image.set_from_stock(gtk.STOCK_NO, gtk.ICON_SIZE_MENU)
                text = "Server not ready"
            elif not self.wallet.up_to_date:
                self.status_image.set_from_stock(gtk.STOCK_REFRESH, gtk.ICON_SIZE_MENU)
                text = "Synchronizing..."
            else:
                self.status_image.set_from_stock(gtk.STOCK_YES, gtk.ICON_SIZE_MENU)
                self.network_button.set_tooltip_text("Connected to %s:%d.\n%d blocks"%(interface.host, interface.port, self.wallet.blocks))
                c, u = self.wallet.get_balance()
                text =  "Balance: %s "%( format_satoshis(c,False,self.wallet.num_zeros) )
                if u: text +=  "[%s unconfirmed]"%( format_satoshis(u,True,self.wallet.num_zeros).strip() )
        else:
            self.status_image.set_from_stock(gtk.STOCK_NO, gtk.ICON_SIZE_MENU)
            self.network_button.set_tooltip_text("Trying to contact %s.\n%d blocks"%(interface.host, self.wallet.blocks))
            text = "Not connected"

        self.status_bar.pop(self.context_id) 
        self.status_bar.push(self.context_id, text)

        if self.wallet.was_updated and self.wallet.up_to_date:
            self.update_history_tab()
            self.update_receiving_tab()
            # addressbook too...
            self.info.set_text( self.wallet.banner )
            self.wallet.was_updated = False
        

    def update_receiving_tab(self):
        self.recv_list.clear()
        for address in self.wallet.all_addresses():
            if self.wallet.is_change(address):continue
            label = self.wallet.labels.get(address)
            n = 0 
            h = self.wallet.history.get(address,[])
            for item in h:
                if not item['is_input'] : n=n+1
            tx = "None" if n==0 else "%d"%n
            self.recv_list.append((address, label, tx ))

    def update_sending_tab(self):
        # detect addresses that are not mine in history, add them here...
        self.addressbook_list.clear()
        for alias, v in self.wallet.aliases.items():
            s, target = v
            label = self.wallet.labels.get(alias)
            self.addressbook_list.append((alias, label, '-'))
            
        for address in self.wallet.addressbook:
            label = self.wallet.labels.get(address)
            n = 0 
            for item in self.wallet.tx_history.values():
                if address in item['outputs'] : n=n+1
            tx = "None" if n==0 else "%d"%n
            self.addressbook_list.append((address, label, tx))

    def update_history_tab(self):
        cursor = self.history_treeview.get_cursor()[0]
        self.history_list.clear()
        balance = 0 
        for tx in self.wallet.get_tx_history():
            tx_hash = tx['tx_hash']
            if tx['height']:
                conf = self.wallet.blocks - tx['height'] + 1
                time_str = datetime.datetime.fromtimestamp( tx['timestamp']).isoformat(' ')[:-3]
                conf_icon = gtk.STOCK_APPLY
            else:
                conf = 0
                time_str = 'pending'
                conf_icon = gtk.STOCK_EXECUTE
            v = tx['value']
            balance += v 
            label = self.wallet.labels.get(tx_hash)
            is_default_label = (label == '') or (label is None)
            if is_default_label: label = tx['default_label']
            tooltip = tx_hash + "\n%d confirmations"%conf 

            # tx = self.wallet.tx_history.get(tx_hash)
            details = "Transaction Details:\n\n" \
                      + "Transaction ID:\n" + tx_hash + "\n\n" \
                      + "Status: %d confirmations\n\n"%conf  \
                      + "Date: %s\n\n"%time_str \
                      + "Inputs:\n-"+ '\n-'.join(tx['inputs']) + "\n\n" \
                      + "Outputs:\n-"+ '\n-'.join(tx['outputs'])
            r = self.wallet.receipts.get(tx_hash)
            if r:
                details += "\n_______________________________________" \
                           + '\n\nSigned URI: ' + r[2] \
                           + "\n\nSigned by: " + r[0] \
                           + '\n\nSignature: ' + r[1]
                

            self.history_list.prepend( [tx_hash, conf_icon, time_str, label, is_default_label,
                                        format_satoshis(v,True,self.wallet.num_zeros), format_satoshis(balance,False,self.wallet.num_zeros), tooltip, details] )
        if cursor: self.history_treeview.set_cursor( cursor )



    def newaddress_dialog(self, w):

        title = "New Contact" 
        dialog = gtk.Dialog(title, parent=self.window, 
                            flags=gtk.DIALOG_MODAL|gtk.DIALOG_NO_SEPARATOR, 
                            buttons= ("cancel", 0, "ok",1)  )
        dialog.show()

        label = gtk.HBox()
        label_label = gtk.Label('Label:')
        label_label.set_size_request(120,10)
        label_label.show()
        label.pack_start(label_label)
        label_entry = gtk.Entry()
        label_entry.show()
        label.pack_start(label_entry)
        label.show()
        dialog.vbox.pack_start(label, False, True, 5)

        address = gtk.HBox()
        address_label = gtk.Label('Address:')
        address_label.set_size_request(120,10)
        address_label.show()
        address.pack_start(address_label)
        address_entry = gtk.Entry()
        address_entry.show()
        address.pack_start(address_entry)
        address.show()
        dialog.vbox.pack_start(address, False, True, 5)
        
        result = dialog.run()
        address = address_entry.get_text()
        label = label_entry.get_text()
        dialog.destroy()

        if result == 1:
            if self.wallet.is_valid(address):
                self.wallet.addressbook.append(address)
                if label:  self.wallet.labels[address] = label
                self.wallet.save()
                self.update_sending_tab()
            else:
                errorDialog = gtk.MessageDialog(
                    parent=self.window,
                    flags=gtk.DIALOG_MODAL, 
                    buttons= gtk.BUTTONS_CLOSE, 
                    message_format = "Invalid address")
                errorDialog.show()
                errorDialog.run()
                errorDialog.destroy()

    

class ElectrumGui():

    def __init__(self, wallet):
        self.wallet = wallet

    def main(self, url=None):
        ew = ElectrumWindow(self.wallet)
        if url: ew.set_url(url)
        gtk.main()

    def restore_or_create(self):
        return restore_create_dialog(self.wallet)