Move ConfigurationChangeModel to plugin

Contributes to CL-897

plugins/UM3NetworkPrinting/src/UM3PrintJobOutputModel.py

@@ -0,0 +1,29 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtCore import pyqtSignal, pyqtProperty, QObject, pyqtSlot
+from typing import Optional, TYPE_CHECKING, List
+from PyQt5.QtCore import QUrl
+from PyQt5.QtGui import QImage
+
+from cura.PrinterOutput.PrintJobOutputModel import PrintJobOutputModel
+
+from .ConfigurationChangeModel import ConfigurationChangeModel
+
+
+class UM3PrintJobOutputModel(PrintJobOutputModel):
+    configurationChangesChanged = pyqtSignal()
+
+    def __init__(self, output_controller: "PrinterOutputController", key: str = "", name: str = "", parent=None) -> None:
+        super().__init__(output_controller, key, name, parent)
+        self._configuration_changes = []    # type: List[ConfigurationChangeModel]
+
+    @pyqtProperty("QVariantList", notify=configurationChangesChanged)
+    def configurationChanges(self) -> List[ConfigurationChangeModel]:
+        return self._configuration_changes
+
+    def updateConfigurationChanges(self, changes: List[ConfigurationChangeModel]) -> None:
+        if len(self._configuration_changes) == 0 and len(changes) == 0:
+            return
+        self._configuration_changes = changes
+        self.configurationChangesChanged.emit()