Abstract and enable qrscanner dialog for send screen.

gui/kivy/uix/dialogs/new_contact.py

@@ -9,12 +9,7 @@ class NewContactDialog(Factory.AnimatedPopup):
 
     def load_qr_scanner(self):
         self.dismiss()
-        dlg = Cache.get('electrum_widgets', 'QrScannerDialog')
-        if not dlg:
-            dlg = Factory.QrScannerDialog()
-            Cache.append('electrum_widgets', 'QrScannerDialog', dlg)
-            dlg.bind(on_complete=self.on_complete)
-        dlg.open()
+        App.get_running_app().scan_qr(on_complete=self.on_complete)
 
     def on_complete(self, instance, uri):
         self.new_contact(uri=uri)

gui/kivy/uix/dialogs/qr_scanner.py

@@ -4,9 +4,9 @@ from kivy.lang import Builder
 
 Factory.register('QRScanner', module='electrum_gui.kivy.qr_scanner')
 
-class QrScannerDialog(Factory.AnimaterPopup):
+class QrScannerDialog(Factory.AnimatedPopup):
 
-    __events__('on_complete', )
+    __events__ = ('on_complete', )
 
     def on_symbols(self, instance, value):
         instance.stop()
@@ -18,6 +18,11 @@ class QrScannerDialog(Factory.AnimaterPopup):
         #message = uir.get('message', '')
         self.dispatch('on_omplete', uri)
 
+    def on_complete(self):
+        ''' Default Handler for on_complete event.
+        '''
+        pass
+
 
 Builder.load_string('''
 <QrScannerDialog>
@@ -27,7 +32,7 @@ Builder.load_string('''
     title_size: '24sp'
     border: 7, 7, 7, 7
     size_hint: None, None
-    size: '320dp', '270dp'
+    size: '340dp', '290dp'
     pos_hint: {'center_y': .53}
     separator_color: .89, .89, .89, 1
     separator_height: '1.2dp'