kivy: button that rotates base_unit

gui/kivy/main_window.py

@@ -52,6 +52,8 @@ base_units = {'BTC':8, 'mBTC':5, 'uBTC':2}
 
 class ElectrumWindow(App):
 
+    electrum_config = ObjectProperty(None)
+
     def _get_bu(self):
         return self.electrum_config.get('base_unit', 'mBTC')
 
@@ -64,7 +66,9 @@ class ElectrumWindow(App):
 
     base_unit = AliasProperty(_get_bu, _set_bu)
 
-    electrum_config = ObjectProperty(None)
+    def _rotate_bu(self):
+        keys = sorted(base_units.keys())
+        self.base_unit = keys[ (keys.index(self.base_unit) + 1) % len(keys)]
 
     status = StringProperty(_('Not Connected'))
 

gui/kivy/uix/ui_screens/settings.kv

@@ -13,13 +13,13 @@ Popup:
                 text: _('Base unit')
                 height: '48dp'
                 size_hint: 1, None
-            Spinner:
+            Button:
                 text: app.base_unit
-                values: ('BTC', 'mBTC')
                 size_hint: 1, None
                 height: '48dp'
-                on_text: app.base_unit = self.text
-
+                on_release:
+                    app._rotate_bu()
+                    self.text = app.base_unit
             Label:
                 size_hint: 1, None
                 text: 'OpenAlias'