Updating the settings now fires a new event "SettingsUpdated"

docs/events/index.rst

@@ -356,3 +356,9 @@ SlicingFailed
      * ``stl``: the STL's filename
      * ``gcode``: the sliced GCODE's filename
      * ``reason``: the reason for the slicing having failed
+
+Settings
+--------
+
+SettingsUpdated
+   The internal settings were updated.

src/octoprint/events.py

@@ -81,6 +81,9 @@ class Events(object):
 	SLICING_FAILED = "SlicingFailed"
 	SLICING_CANCELLED = "SlicingCancelled"
 
+	# Settings
+	SETTINGS_UPDATED = "SettingsUpdated"
+
 
 def eventManager():
 	global _instance

src/octoprint/server/api/settings.py

@@ -9,6 +9,7 @@ import logging
 
 from flask import request, jsonify
 
+from octoprint.events import eventManager, Events
 from octoprint.settings import settings
 from octoprint.printer import getConnectionOptions
 
@@ -226,7 +227,8 @@ def setSettings():
 					plugin.on_settings_save(data["plugins"][name])
 
 
-		s.save()
+		if s.save():
+			eventManager().fire(Events.SETTINGS_UPDATED)
 
 	return getSettings()
 

src/octoprint/settings.py

@@ -431,12 +431,13 @@ class Settings(object):
 
 	def save(self, force=False):
 		if not self._dirty and not force:
-			return
+			return False
 
 		with open(self._configfile, "wb") as configFile:
 			yaml.safe_dump(self._config, configFile, default_flow_style=False, indent="    ", allow_unicode=True)
 			self._dirty = False
 		self.load()
+		return True
 
 	#~~ getter