checking if value exist for the keyboard key

app/ui/main_app_window.py

@@ -952,9 +952,10 @@ class MainAppWindow:
 
     def on_tree_view_key_press(self, view, event):
         """  Handling  keystrokes on press """
-        key = KeyboardKey(event.hardware_keycode)
-        if not key:
+        key_code = event.hardware_keycode
+        if not KeyboardKey.value_exist(key_code):
             return
+        key = KeyboardKey(key_code)
         ctrl = event.state & Gdk.ModifierType.CONTROL_MASK
         model_name, model = get_model_data(view)
 
@@ -980,9 +981,10 @@ class MainAppWindow:
 
     def on_tree_view_key_release(self, view, event):
         """  Handling  keystrokes on release """
-        key = KeyboardKey(event.hardware_keycode)
-        if not key:
+        key_code = event.hardware_keycode
+        if not KeyboardKey.value_exist(key_code):
             return
+        key = KeyboardKey(key_code)
         ctrl = event.state & Gdk.ModifierType.CONTROL_MASK
         alt = event.state & Gdk.ModifierType.MOD1_MASK
         model_name, model = get_model_data(view)

app/ui/satellites_dialog.py

@@ -113,7 +113,10 @@ class SatellitesDialog:
 
     def on_key_release(self, view, event):
         """  Handling  keystrokes  """
-        key = KeyboardKey(event.hardware_keycode)
+        key_code = event.hardware_keycode
+        if not KeyboardKey.value_exist(key_code):
+            return
+        key = KeyboardKey(key_code)
         ctrl = event.state & Gdk.ModifierType.CONTROL_MASK
 
         if key is KeyboardKey.DELETE:

app/ui/uicommons.py

@@ -60,9 +60,8 @@ class KeyboardKey(Enum):
     PAGE_DOWN_KP = 89
 
     @classmethod
-    def _missing_(cls, value):
-        """ Overridden for skip ValueError if value is not found. """
-        pass
+    def value_exist(cls, value):
+        return value in (val.value for val in cls.__members__.values())
 
 
 # Keys for move in lists. KEY_KP_(NAME) for laptop!!!