From 3adf7d49d017bd16b26de0f6cc1c41cf32260642 Mon Sep 17 00:00:00 2001
From: Lipu Fei <lipu.fei815@gmail.com>
Date: Fri, 5 Apr 2019 10:51:06 +0200
Subject: [PATCH] Switch to the first enabled extruder after setActiveMachine

CURA-5930
---
 cura/Settings/MachineManager.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 3cee636d1d..87f16888cf 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -362,7 +362,6 @@ class MachineManager(QObject):
             # Mark global stack as invalid
             ConfigurationErrorMessage.getInstance().addFaultyContainers(global_stack.getId())
             return  # We're done here
-        ExtruderManager.getInstance().setActiveExtruderIndex(0)  # Switch to first extruder
 
         self._global_container_stack = global_stack
         self._application.setGlobalContainerStack(global_stack)
@@ -370,6 +369,11 @@ class MachineManager(QObject):
         self._initMachineState(global_stack)
         self._onGlobalContainerChanged()
 
+        # Switch to the first enabled extruder
+        self.updateDefaultExtruder()
+        default_extruder_position = int(self.defaultExtruderPosition)
+        ExtruderManager.getInstance().setActiveExtruderIndex(default_extruder_position)
+
         self.__emitChangedSignals()
 
     ##  Given a definition id, return the machine with this id.