Add the received slice_uuid to the print information

Contributes to CURA-9031

cura/UI/PrintInformation.py

@@ -38,6 +38,8 @@ class PrintInformation(QObject):
 
         self.initializeCuraMessagePrintTimeProperties()
 
+        self._slice_uuid: Optional[str] = None
+
         # Indexed by build plate number
         self._material_lengths = {}  # type: Dict[int, List[float]]
         self._material_weights = {}  # type: Dict[int, List[float]]
@@ -132,6 +134,14 @@ class PrintInformation(QObject):
             self._updateJobName()
             self.preSlicedChanged.emit()
 
+    @property
+    def slice_uuid(self) -> Optional[str]:
+        return self._slice_uuid
+
+    @slice_uuid.setter
+    def slice_uuid(self, value: Optional[str]) -> None:
+        self._slice_uuid = value
+
     @pyqtProperty(QObject, notify = currentPrintTimeChanged)
     def currentPrintTime(self) -> Duration:
         return self._current_print_time[self._active_build_plate]

plugins/CuraEngineBackend/Cura.proto

@@ -139,5 +139,9 @@ message GCodePrefix {
     bytes data = 2; //Header string to be prepended before the rest of the g-code sent from the engine.
 }
 
+message SliceUUID {
+    string slice_uuid = 1; //The UUID of the slice.
+}
+
 message SlicingFinished {
 }

plugins/CuraEngineBackend/CuraEngineBackend.py

@@ -124,6 +124,7 @@ class CuraEngineBackend(QObject, Backend):
         self._message_handlers["cura.proto.Progress"] = self._onProgressMessage
         self._message_handlers["cura.proto.GCodeLayer"] = self._onGCodeLayerMessage
         self._message_handlers["cura.proto.GCodePrefix"] = self._onGCodePrefixMessage
+        self._message_handlers["cura.proto.SliceUUID"] = self._onSliceUUIDMessage
         self._message_handlers["cura.proto.PrintTimeMaterialEstimates"] = self._onPrintTimeMaterialEstimates
         self._message_handlers["cura.proto.SlicingFinished"] = self._onSlicingFinishedMessage
 
@@ -812,6 +813,10 @@ class CuraEngineBackend(QObject, Backend):
         except KeyError:  # Can occur if the g-code has been cleared while a slice message is still arriving from the other end.
             pass  # Throw the message away.
 
+    def _onSliceUUIDMessage(self, message: Arcus.PythonMessage) -> None:
+        application = CuraApplication.getInstance()
+        application.getPrintInformation().slice_uuid = message.slice_uuid
+
     def _createSocket(self, protocol_file: str = None) -> None:
         """Creates a new socket connection."""