fix go_back_in_history

Author: akshayaurora

eventsapp/uix/screens/screenfeedback.py

@@ -77,3 +77,8 @@ def on_pre_leave(self):
 
     def on_leave(self):
         self.manager.transition.direction = 'left'
+        self.ids.sldr.value = 0
+        self.ids.root.talk = ''
+        self.ids.ti_description.text = ''
+        self.ids.ti_name.text = ''
+        self.ids.ti_ticketid.text = ''

eventsapp/utils/__init__.py

@@ -2,6 +2,7 @@
 
 from kivy.app import App
 from kivy.utils import platform
+from kivy.uix.screenmanager import ScreenManagerException
 if platform == 'android':
     from jnius import autoclass, cast
     JS = autoclass('java.lang.String')
@@ -112,21 +113,14 @@ def go_back_in_history():
     app = App.get_running_app()
     from utils import pause_app
     try:
-        scr = app._navigation_higherarchy.pop()
-        if scr.name == 'ScreenSchedule':
-            # we are at top of Nav higherarchy
+        if not len(app._navigation_higherarchy):
             pause_app()
             return
-
-        # we are not at root of Nav higherarchy
-        scr = app._navigation_higherarchy[-1]
+        scr = app._navigation_higherarchy.pop()
         load_screen(
             scr.name,
             manager=scr.manager,
             store_back=False)
-    except IndexError:
+    except ScreenManagerException:
         # check if current screen is schedule screen?
-        if app.navigation_manager.current == 'ScreenSchedule':
-            pause_app()
-            return
-        load_screen('ScreenSchedule')
+        pause_app()