timer start, py3.8 support

katrain/gui/popups.py

@@ -320,3 +320,27 @@ class ConfigTeacherPopup(QuickConfigGui):
             return
         self.katrain.update_state()
         self.popup.dismiss()
+
+
+
+class ConfigTimerPopup(QuickConfigGui):
+    def __init__(self, katrain, popup, **kwargs):
+        self.settings = katrain.config("timer")
+        super().__init__(katrain, popup, self.settings, **kwargs)
+        Clock.schedule_once(self.build, 0)
+        self.spacing = 2
+
+    def build(self, _dt):
+        thrbox = GridLayout(spacing=1, padding=2, cols=2, rows=2,size_hint=(1,2))
+        thrbox.add_widget(ScaledLightLabel(text="Byo-yomi\nperiod length (s)", bold=True,size_hint=(2,1),num_lines=2))
+        thrbox.add_widget(LabelledIntInput(text='30', input_property="byo_length"))
+        thrbox.add_widget(ScaledLightLabel(text="Byo-yomi\nnumber of periods", bold=True,size_hint=(2,1),num_lines=2))
+        thrbox.add_widget(LabelledIntInput(text='5', input_property="byo_num"))
+        self.add_widget(thrbox)
+        self.add_widget(StyledButton(text=f"Apply and Save", on_press=lambda _: self.update_config(True)))
+
+    def update_config(self, save_to_file=False):
+        self.katrain.controls.timer_settings = self.collect_properties(self)
+        self.katrain.update_state()
+        self.popup.dismiss()
+