From 32d5fbe557b235e81a3991070be36133b151666c Mon Sep 17 00:00:00 2001
From: Jack Ha <j.ha@ultimaker.com>
Date: Mon, 13 Mar 2017 17:17:56 +0100
Subject: [PATCH] Fixed choosing a quality that is compatible with multiple
 extruders as fallback. CURA-3510

---
 cura/Settings/ExtruderManager.py |  7 +++++++
 cura/Settings/MachineManager.py  | 14 ++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)
 mode change 100644 => 100755 cura/Settings/ExtruderManager.py
 mode change 100644 => 100755 cura/Settings/MachineManager.py

diff --git a/cura/Settings/ExtruderManager.py b/cura/Settings/ExtruderManager.py
old mode 100644
new mode 100755
index 14106d5804..f6c1759078
--- a/cura/Settings/ExtruderManager.py
+++ b/cura/Settings/ExtruderManager.py
@@ -135,6 +135,13 @@ class ExtruderManager(QObject):
                     return self._extruder_trains[global_container_stack.getId()][str(index)]
         return None
 
+    ##  Get all extruder stacks
+    def getExtruderStacks(self):
+        result = []
+        for i in range(self.extruderCount):
+            result.append(self.getExtruderStack(i))
+        return result
+
     ##  Adds all extruders of a specific machine definition to the extruder
     #   manager.
     #
diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
old mode 100644
new mode 100755
index d4e246ab63..e690fcec1d
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -749,12 +749,14 @@ class MachineManager(QObject):
                                         quality_manager.getWholeMachineDefinition(machine_definition),
                                         [material_container])
             if not candidate_quality or candidate_quality.getId() == "empty_quality":
-                # Fall back to a quality
-                new_quality = quality_manager.findQualityByQualityType(None,
-                                    quality_manager.getWholeMachineDefinition(machine_definition),
-                                    [material_container])
-                if new_quality:
-                    new_quality_id = new_quality.getId()
+                # Fall back to a quality (which must be compatible with all other extruders)
+                new_qualities = quality_manager.findAllUsableQualitiesForMachineAndExtruders(
+                    self._global_container_stack, ExtruderManager.getInstance().getExtruderStacks())
+
+                if new_qualities:
+                    new_quality_id = new_qualities[0].getId()  # Just pick the first available one
+                else:
+                    Logger.log("w", "No quality profile found that matches the current machine and extruders.")
             else:
                 if not old_quality_changes:
                     new_quality_id = candidate_quality.getId()