Add kivy QR-code Screen

src/bitmessagekivy/baseclass/qrcode.py

@@ -0,0 +1,31 @@
+# pylint: disable=import-error, no-name-in-module, too-few-public-methods
+
+"""
+Generate QRcode of saved addresses in addressbook.
+"""
+
+from kivy.app import App
+from kivy.uix.screenmanager import Screen
+from kivy.properties import StringProperty
+from kivy_garden.qrcode import QRCodeWidget
+from debug import logger
+
+
+class ShowQRCode(Screen):
+    """ShowQRCode Screen class for kivy Ui"""
+    address = StringProperty()
+
+    def __init__(self, *args, **kwargs):
+        """Instantiate kivy state variable"""
+        super(ShowQRCode, self).__init__(*args, **kwargs)
+        self.kivy_running_app = App.get_running_app()
+
+    def qrdisplay(self, instance, address):
+        """Method used for showing QR Code"""
+        self.ids.qr.clear_widgets()
+        self.kivy_running_app.set_toolbar_for_QrCode()
+        self.address = address  # used for label
+        self.ids.qr.add_widget(QRCodeWidget(data=self.address))
+        self.ids.qr.children[0].show_border = False
+        instance.parent.parent.parent.dismiss()
+        logger.debug('Show QR code')