From 4e8fb254f67790c6f97e12f1d365521ce0235933 Mon Sep 17 00:00:00 2001
From: Jaime van Kessel <nallath@gmail.com>
Date: Tue, 24 Jan 2017 13:14:10 +0100
Subject: [PATCH] Only emit signal when the active extruder actually changes

---
 cura/Settings/ExtruderManager.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cura/Settings/ExtruderManager.py b/cura/Settings/ExtruderManager.py
index 81579f74d0..e57ff3115e 100644
--- a/cura/Settings/ExtruderManager.py
+++ b/cura/Settings/ExtruderManager.py
@@ -96,8 +96,9 @@ class ExtruderManager(QObject):
     #   \param index The index of the new active extruder.
     @pyqtSlot(int)
     def setActiveExtruderIndex(self, index):
-        self._active_extruder_index = index
-        self.activeExtruderChanged.emit()
+        if self._active_extruder_index != index:
+            self._active_extruder_index = index
+            self.activeExtruderChanged.emit()
 
     @pyqtProperty(int, notify = activeExtruderChanged)
     def activeExtruderIndex(self):