Check current desktop environment type

safeeyes/SettingsDialog.py

@@ -72,7 +72,8 @@ class SettingsDialog:
 		self.spin_postpone_duration.set_value(config['postpone_duration'])
 		self.switch_strict_break.set_active(config['strict_break'])
 		self.switch_audible_alert.set_active(config['audible_alert'])
-		self.switch_screen_lock.set_active(self.config.get('enable_screen_lock', True))
+		self.switch_screen_lock.set_sensitive(Utility.is_desktop_lock_supported())
+		self.switch_screen_lock.set_active(Utility.is_desktop_lock_supported() and self.config.get('enable_screen_lock', True))
 		self.spin_time_to_screen_lock.set_value(self.config.get('time_to_screen_lock', 20))
 		self.on_switch_screen_lock_activate(self.switch_screen_lock, self.switch_screen_lock.get_active())
 

safeeyes/Utility.py

@@ -240,3 +240,19 @@ def read_lang_files():
 				languages[lang_file_name.lower().replace('.json', '')] = lang['meta_info']['language_name']
 
 	return languages
+
+def desktop_envinroment():
+	"""
+	Function tries to detect current envinroment
+	Possible results: unity, gnome or None if nothing detected
+	"""
+	if 'unity' == os.environ.get('XDG_CURRENT_DESKTOP', '').lower():
+		return 'unity'
+	elif 'gnome' == os.environ.get('DESKTOP_SESSION', '').lower():
+		return 'gnome'
+	
+	return None
+
+def is_desktop_lock_supported():
+	return desktop_envinroment() in ['unity', 'gnome']
+