Restructure for better usability

gui/popups/popups.kv

@@ -0,0 +1,111 @@
+<QuitPopup>:
+    title: "BiogasControllerApp"
+    font_size: 50
+    size_hint: 0.5, 0.4
+    auto_dismiss: False
+    GridLayout:
+        cols: 1
+        Label:
+            text: "Are you sure you want to leave?"
+            font_size: 20
+        GridLayout:
+            cols:2
+            Button:
+                text: "Yes"
+                font_size: 15
+                on_release:
+                    root.quit()
+                    app.stop()
+            Button:
+                text: "No"
+                font_size: 15
+                on_press:
+                    root.dismiss()
+
+<SingleRowPopup>:
+    title: "INFORMATION"
+    size_hint: 0.7, 0.5
+    auto_dismiss: True
+    GridLayout:
+        cols: 1
+        Label:
+            id: msg
+            text: "Message"
+            text_size: self.width, None
+            halign: 'center'
+        GridLayout:
+            cols: 1
+            Button:
+                text: "Ok"
+                on_release:
+                    root.dismiss()
+
+<TwoActionPopup>:
+    title: "WARNING!"
+    font_size: 50
+    size_hint: 0.5, 0.4
+    auto_dismiss: False
+    GridLayout:
+        cols:1
+        Label:
+            id: msg
+            text: "Message"
+            font_size: 20
+            halign: 'center'
+        GridLayout:
+            cols:2
+            Button:
+                id: btn1
+                text: "Details"
+                on_release:
+                    root.action_one()
+                    root.dismiss()
+            Button:
+                id: btn2
+                text:"Ok"
+                on_release:
+                    root.action_two()
+                    root.dismiss()
+
+<DualRowPopup>:
+    title: "Details"
+    font_size: 50
+    size_hint: 0.7, 0.6
+    auto_dismiss: False
+    GridLayout:
+        cols:1
+        Label:
+            id: msg_title
+            text: "Message title"
+            font_size: 20
+        Label:
+            id: msg_body
+            text: "Message body"
+            font_size: 14
+        Button:
+            text:"Ok"
+            on_release:
+                root.dismiss()
+
+<LargeTrippleRowPopUp>:
+    title: "DETAILS"
+    font_size: 50
+    size_hint: 1, 0.7
+    auto_dismiss: False
+    GridLayout:
+        cols: 1
+        Label:
+            id: msg_title
+            text: "title"
+            font_size: 20
+        Label:
+            id: msg_body
+            text: "Message"
+            font_size: 13
+        Label:
+            text: msg_extra
+            font_size: 13
+        Button:
+            text:"Ok"
+            on_release:
+                root.dismiss()

gui/popups/popups.py

@@ -0,0 +1,63 @@
+from typing import Callable
+from kivy.uix.popup import Popup
+from kivy.lang import Builder
+
+from lib.com import ComSuperClass
+
+
+# Just an empty function
+def empty_func():
+    pass
+
+#          ╭────────────────────────────────────────────────╮
+#          │                     Popups                     │
+#          ╰────────────────────────────────────────────────╯
+# Below, you can find various popups with various designs that can be used in the app
+class QuitPopup(Popup):
+    def __init__(self, com: ComSuperClass, **kw):
+        self._com = com;
+        super().__init__(**kw)
+
+    def quit(self):
+        self._com.close()
+
+class SingleRowPopup(Popup):
+    def open(self, message, *_args, **kwargs):
+        self.ids.msg.text = message
+        return super().open(*_args, **kwargs)
+
+class DualRowPopup(Popup):
+    def open(self, title: str, message: str, *_args, **kwargs):
+        self.ids.msg_title.text = title
+        self.ids.msg_body.text = message
+        return super().open(*_args, **kwargs)
+
+class LargeTrippleRowPopup(Popup):
+    def open(self, title: str, message: str, details: str, *_args, **kwargs):
+        self.ids.msg_title.text = title
+        self.ids.msg_body.text = message
+        self.ids.msg_extra.text = details
+        return super().open(*_args, **kwargs)
+
+class TwoActionPopup(Popup):
+    def open(self, 
+             message: str,
+             button_one: str,
+             action_one: Callable[[], None],
+             button_two: str = 'Ok',
+             action_two: Callable[[], None] = empty_func,
+             *_args,
+             **kwargs
+        ):
+        self.ids.msg.text = message
+        self.ids.btn1.text = button_one
+        self.ids.btn2.text = button_two
+        self.action_one = action_one
+        self.action_two = action_two
+        return super().open(*_args, **kwargs)
+
+
+# Load the design file for this screen (.kv files)
+# The path has to be relative to root of the app, i.e. where the biogascontrollerapp.py 
+# file is located
+Builder.load_file('./gui/popups/popups.kv')