CURA-4870 Add list of unique configurations to the output device. The printer output model calculates the configuration every time a change is received from the output device

cura/PrinterOutput/ConfigurationModel.py

@@ -0,0 +1,42 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtCore import pyqtProperty, QObject
+
+
+class ConfigurationModel(QObject):
+
+    def __init__(self):
+        self._printer_type = None
+        self._extruder_configurations = []
+        self._buildplate_configuration = None
+
+    def setPrinterType(self, printer_type):
+        self._printer_type = printer_type
+
+    @pyqtProperty(str, fset = setPrinterType, constant = True)
+    def printerType(self):
+        return self._printer_type
+
+    def setExtruderConfigurations(self, extruder_configurations):
+        self._extruder_configurations = extruder_configurations
+
+    @pyqtProperty("QVariantList", fset = setExtruderConfigurations, constant = True)
+    def extruderConfigurations(self):
+        return self._extruder_configurations
+
+    def setBuildplateConfiguration(self, buildplate_configuration):
+        self._buildplate_configuration = buildplate_configuration
+
+    @pyqtProperty(str, fset = setBuildplateConfiguration, constant = True)
+    def buildplateConfiguration(self):
+        return self._buildplate_configuration
+
+    def __eq__(self, other):
+        return hash(self) == hash(other)
+
+    def __hash__(self):
+        extruder_hash = hash(0)
+        for configuration in self.extruderConfigurations:
+            extruder_hash ^= hash(frozenset(configuration.items()))
+        return hash(self.printerType) ^ extruder_hash ^ hash(self.buildplateConfiguration)