spawn both guis at start. clicking expand hides the simple one, shows the expert one.

lib/gui_lite.py

@@ -35,19 +35,18 @@ class ElectrumGui:
         actuator = MiniActuator(self.wallet)
         self.mini = MiniWindow(actuator, self.expand)
         driver = MiniDriver(self.wallet, self.mini)
-        self.app.exec_()
+
+        timer = Timer()
+        timer.start()
+        self.expert = gui_qt.ElectrumWindow(self.wallet)
+        self.expert.connect_slots(timer)
+        self.expert.update_wallet()
+
+        sys.exit(self.app.exec_())
 
     def expand(self):
         self.mini.hide()
-        self.actuator = None
+        self.expert.show()
-        self.mini = None
-        self.driver = None
-        self.wallet.gui_callback = None
-        self.timer = Timer()
-        self.timer.start()
-        self.gui = gui_qt.ElectrumWindow(self.wallet)
-        self.gui.connect_slots(self.timer)
-        self.gui.update_wallet()
 
 class MiniWindow(QDialog):
 
@@ -306,7 +305,7 @@ class MiniDriver(QObject):
         self.wallet = wallet
         self.window = window
 
-        self.wallet.gui_callback = self.update_callback
+        self.wallet.register_callback(self.update_callback)
 
         self.state = None
 

lib/gui_qt.py

@@ -187,7 +187,7 @@ class ElectrumWindow(QMainWindow):
     def __init__(self, wallet):
         QMainWindow.__init__(self)
         self.wallet = wallet
-        self.wallet.gui_callback = self.update_callback
+        self.wallet.register_callback(self.update_callback)
 
         self.funds_error = False
         self.completions = QStringListModel()
@@ -207,7 +207,6 @@ class ElectrumWindow(QMainWindow):
         title = 'Electrum ' + self.wallet.electrum_version + '  -  ' + self.wallet.path
         if not self.wallet.seed: title += ' [seedless]'
         self.setWindowTitle( title )
-        self.show()
 
         QShortcut(QKeySequence("Ctrl+W"), self, self.close)
         QShortcut(QKeySequence("Ctrl+Q"), self, self.close)
@@ -1490,5 +1489,6 @@ class ElectrumGui():
         w.app = self.app
         w.connect_slots(s)
         w.update_wallet()
+        w.show()
 
         self.app.exec_()

lib/interface.py

@@ -406,13 +406,13 @@ class WalletSynchronizer(threading.Thread):
                         self.wallet.was_updated = True
 
                 if self.wallet.was_updated:
-                    self.wallet.gui_callback()
+                    self.wallet.trigger_callbacks()
                     self.wallet.was_updated = False
 
                 response = self.interface.responses.get()
                 self.handle_response(response)
 
-            self.wallet.gui_callback()
+            self.wallet.trigger_callbacks()
             if self.loop:
                 time.sleep(5)
                 self.init_interface()

lib/wallet.py

@@ -249,11 +249,11 @@ from interface import DEFAULT_SERVERS
 
 
 class Wallet:
-    def __init__(self, gui_callback = lambda: None):
+    def __init__(self):
 
         self.electrum_version = ELECTRUM_VERSION
         self.seed_version = SEED_VERSION
-        self.gui_callback = gui_callback
+        self.update_callbacks = []
 
         self.gap_limit = 5           # configuration
         self.use_change = True
@@ -299,7 +299,14 @@ class Wallet:
 
         self.pick_random_server()
 
+    def register_callback(self, update_callback):
+        with self.lock:
+            self.update_callbacks.append(update_callback)
 
+    def trigger_callbacks(self):
+        with self.lock:
+            callbacks = self.update_callbacks[:]
+        [update() for update in callbacks]
 
     def pick_random_server(self):
         self.server = random.choice( DEFAULT_SERVERS )         # random choice when the wallet is created