kivy: button to show seed, and show error if trying to spend from watching only wallet

gui/kivy/main_window.py

@@ -706,6 +706,18 @@ class ElectrumWindow(App):
         else:
             apply(f, args + (None,))
 
+    def show_seed(self, label):
+        self.protected(self._show_seed, (label,))
+
+    def _show_seed(self, label, password):
+        print label, password
+        try:
+            seed = self.wallet.get_seed(password)
+        except:
+            self.show_error("Invalid PIN")
+            return
+        label.text = _('Seed') + ':\n' + seed
+
     def change_password(self):
         self.protected(self._change_password, ())
 

gui/kivy/uix/screens.py

@@ -272,6 +272,9 @@ class SendScreen(CScreen):
             traceback.print_exc(file=sys.stdout)
             self.app.show_error(str(e))
             return
+        if not tx.is_complete():
+            self.app.show_info("Transaction is not complete")
+            return
         # broadcast
         ok, txid = self.app.wallet.sendtx(tx)
         self.app.show_info(txid)

gui/kivy/uix/ui_screens/status.kv

@@ -67,5 +67,24 @@ Popup:
                 opacity: 1 if root.unmatured else 0
                 text_size: self.size
                 halign: 'left'
+        Label:
+            text: ''
+            id: seed_label
+            text_size: self.width, None
+            size: self.texture_size
         Widget:
             size_hint: None, 1
+        BoxLayout:
+            size_hint: 1, None
+            height: '48dp'
+            Button:
+                size_hint: 0.5, None
+                height: '48dp'
+                text: _('Hide seed') if seed_label.text else _('Show seed')
+                on_release:
+                    setattr(seed_label, 'text', '') if seed_label.text else app.show_seed(seed_label)
+            Button:
+                size_hint: 0.5, None
+                height: '48dp'
+                text: _('Close')
+                on_release: root.dismiss()