change some features of main python file

Python/main.py

@@ -1,6 +1,7 @@
 # Kivy OpenCV Barcode Scanner
-# done by Vijeth P H
+# done by Vijeth P H 
 from kivy.app import App
+from kivy.uix.screenmanager import ScreenManager, Screen
 from kivy.uix.image import Image
 from kivy.uix.widget import Widget
 from kivy.uix.label import Label
@@ -10,36 +11,36 @@
 from kivy.clock import Clock
 from kivy.graphics.texture import Texture
 from pyzbar import pyzbar
+import webbrowser
 import cv2
 
 # Create global variables, for storing and displaying barcodes
 outputtext=''
+weblink=''
 leb=Label(text=outputtext,size_hint_y=None,height='48dp',font_size='45dp')
 found = set()       # this will not allow duplicate barcode scans to be stored
 togglflag=True
 
-class BarcodeApp(App):
-    # initialize all widgets for display
-    def build(self):
-        layout=BoxLayout()      # boxlayout is where widgets are placed adjacent to each other
-        layout.orientation='vertical'      # make adjacency of widgets vertical
-        # create OpenCV camera
-        self.cam=cv2.VideoCapture(0)
+class MainScreen(BoxLayout):
+    # first screen that is displayed when program is run
+    def __init__(self,**kwargs):
+        super().__init__(**kwargs)
+        self.orientation='vertical'  # vertical placing of widgets
+
+        self.cam=cv2.VideoCapture(0)    # start OpenCV camera
         self.cam.set(3,1280)        # set resolution of camera
         self.cam.set(4,720)
-        self.img=Image()
+        self.img=Image()        # Image widget to display frames
 
         # create Toggle Button for pause and play of video stream
         self.togbut=ToggleButton(text='Pause',group='camstart',state='down',size_hint_y=None,height='48dp',on_press=self.change_state)
         self.but=Button(text='Stop',size_hint_y=None,height='48dp',on_press=self.stop_stream)
-        layout.add_widget(self.img)
-        layout.add_widget(leb)
-        layout.add_widget(self.togbut)
-        layout.add_widget(self.but)
+        self.add_widget(self.img)
+        self.add_widget(self.togbut)
+        self.add_widget(self.but)
         Clock.schedule_interval(self.update,1.0/30)     # update for 30fps
 
-        return layout
-
+
     # update frame of OpenCV camera
     def update(self,dt):
         if togglflag:
@@ -58,16 +59,19 @@ def update(self,dt):
                     cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 0, 255), 2)
                     barcodeData = barcode.data.decode("utf-8")
                     barcodeType = barcode.type
+                    weblink=barcodeData
                     text = "{} ({})".format(barcodeData, barcodeType)
                     cv2.putText(frame, text, (x, y - 10),cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)
                     if barcodeData not in found:    # check if detected barcode is a duplicate
                         outputtext=text
                         leb.text=outputtext         # display the barcode details
                         found.add(barcodeData)
+                        self.change_screen()
 
                 key = cv2.waitKey(1) & 0xFF
                 if key == ord("q"):
-                    pass
+                    cv2.destroyAllWindows()
+                    exit(0)
 
     # change state of toggle button
     def change_state(self,*args):
@@ -81,9 +85,40 @@ def change_state(self,*args):
 
 
     def stop_stream(self,*args):
-        self.cam.release()
-
-
+        self.cam.release()  # stop camera
+
+    def change_screen(self,*args):
+        main_app.sm.current='second'    # once barcode is detected, switch to second screen
+
+class SecondScreen(BoxLayout):
+    def __init__(self,**kwargs):
+        super().__init__(**kwargs)
+        self.orientation='vertical'
+        self.lab1=Label(text='Output: ',size_hint_y=None,height='48dp',font_size='45dp')
+        self.but1=Button(text='Open in Web Browser',on_press=self.open_browser,size_hint_y=None,height='48dp')
+        self.add_widget(self.lab1)
+        self.add_widget(leb)
+        self.add_widget(self.but1)
+
+    def open_browser(self,*args):
+        webbrowser.open(weblink)       # this opens link in browser
+
+class TestApp(App):
+    def build(self):
+        self.sm=ScreenManager()     # screenmanager is used to manage screens
+        self.mainsc=MainScreen()
+        scrn=Screen(name='main')
+        scrn.add_widget(self.mainsc)
+        self.sm.add_widget(scrn)
+
+        self.secondsc=SecondScreen()
+        scrn=Screen(name='second')
+        scrn.add_widget(self.secondsc)
+        self.sm.add_widget(scrn)
+
+        return self.sm
+
 if __name__ == '__main__':
-    BarcodeApp().run()
-    cv2.destroyAllWindows()
+    main_app=TestApp()
+    main_app.run()
+    cv2.destroyAllWindows()