Make ConnectionType Enum type accessible to QML

CURA-6011

cura/CuraApplication.py

@@ -113,6 +113,7 @@ from cura.Settings.CuraFormulaFunctions import CuraFormulaFunctions
 
 from cura.ObjectsModel import ObjectsModel
 
+from cura.PrinterOutputDevice import PrinterOutputDevice
 from cura.PrinterOutput.NetworkMJPGImage import NetworkMJPGImage
 
 from UM.FlameProfiler import pyqtSlot
@@ -975,6 +976,8 @@ class CuraApplication(QtApplication):
         qmlRegisterSingletonType(ContainerManager, "Cura", 1, 0, "ContainerManager", ContainerManager.getInstance)
         qmlRegisterType(SidebarCustomMenuItemsModel, "Cura", 1, 0, "SidebarCustomMenuItemsModel")
 
+        qmlRegisterType(PrinterOutputDevice, "Cura", 1, 0, "PrinterOutputDevice")
+
         from cura.API import CuraAPI
         qmlRegisterSingletonType(CuraAPI, "Cura", 1, 1, "API", self.getCuraAPI)
 

cura/PrinterOutputDevice.py

@@ -4,7 +4,7 @@
 from UM.Decorators import deprecated
 from UM.i18n import i18nCatalog
 from UM.OutputDevice.OutputDevice import OutputDevice
-from PyQt5.QtCore import pyqtProperty, pyqtSignal, QObject, QTimer, QUrl
+from PyQt5.QtCore import pyqtProperty, pyqtSignal, QObject, QTimer, QUrl, Q_ENUMS
 from PyQt5.QtWidgets import QMessageBox
 
 from UM.Logger import Logger
@@ -54,6 +54,12 @@ class ConnectionType(IntEnum):
 #   For all other uses it should be used in the same way as a "regular" OutputDevice.
 @signalemitter
 class PrinterOutputDevice(QObject, OutputDevice):
+
+    # Put ConnectionType here with Q_ENUMS() so it can be registered as a QML type and accessible via QML, and there is
+    # no need to remember what those Enum integer values mean.
+    ConnectionType = ConnectionType
+    Q_ENUMS(ConnectionType)
+
     printersChanged = pyqtSignal()
     connectionStateChanged = pyqtSignal(str)
     acceptsCommandsChanged = pyqtSignal()

resources/qml/PrinterSelector/MachineSelectorList.qml

@@ -30,9 +30,16 @@ Column
         model: UM.ContainerStacksModel
         {
             id: networkedPrintersModel
+            property var umConnectionTypes: [Cura.PrinterOutputDevice.NetworkConnection,
+                                             Cura.PrinterOutputDevice.ClusterConnection,
+                                             Cura.PrinterOutputDevice.CloudConnection
+                                             ]
             filter:
             {
-                "type": "machine", "um_network_key": "*", "hidden": "False", "um_connection_type": "[2,3,4]"
+                "type": "machine",
+                "um_network_key": "*",
+                "hidden": "False",
+                "um_connection_type": "[" + umConnectionTypes.join(",") + "]"
             }
         }