# Copyright (c) 2017 Ultimaker B.V. # Cura is released under the terms of the LGPLv3 or higher. from UM.Backend.Backend import Backend, BackendState from UM.Application import Application from UM.Scene.SceneNode import SceneNode from UM.Signal import Signal from UM.Logger import Logger from UM.Message import Message from UM.PluginRegistry import PluginRegistry from UM.Resources import Resources from UM.Platform import Platform from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator from UM.Qt.Duration import DurationFormat from PyQt5.QtCore import QObject, pyqtSlot from collections import defaultdict from cura.Settings.ExtruderManager import ExtruderManager from . import ProcessSlicedLayersJob from . import StartSliceJob import os import sys from time import time from PyQt5.QtCore import QTimer import Arcus from UM.i18n import i18nCatalog catalog = i18nCatalog("cura") class CuraEngineBackend(QObject, Backend): backendError = Signal() ## Starts the back-end plug-in. # # This registers all the signal listeners and prepares for communication # with the back-end in general. # CuraEngineBackend is exposed to qml as well. def __init__(self, parent = None): super().__init__(parent = parent) # Find out where the engine is located, and how it is called. # This depends on how Cura is packaged and which OS we are running on. executable_name = "CuraEngine" if Platform.isWindows(): executable_name += ".exe" default_engine_location = executable_name if os.path.exists(os.path.join(Application.getInstallPrefix(), "bin", executable_name)): default_engine_location = os.path.join(Application.getInstallPrefix(), "bin", executable_name) if hasattr(sys, "frozen"): default_engine_location = os.path.join(os.path.dirname(os.path.abspath(sys.executable)), executable_name) if Platform.isLinux() and not default_engine_location: if not os.getenv("PATH"): raise OSError("There is something wrong with your Linux installation.") for pathdir in os.getenv("PATH").split(os.pathsep): execpath = os.path.join(pathdir, executable_name) if os.path.exists(execpath): default_engine_location = execpath break self._application = Application.getInstance() self._multi_build_plate_model = None self._machine_error_checker = None if not default_engine_location: raise EnvironmentError("Could not find CuraEngine") Logger.log("i", "Found CuraEngine at: %s", default_engine_location) default_engine_location = os.path.abspath(default_engine_location) Application.getInstance().getPreferences().addPreference("backend/location", default_engine_location) # Workaround to disable layer view processing if layer view is not active. self._layer_view_active = False self._onActiveViewChanged() self._stored_layer_data = [] self._stored_optimized_layer_data = {} # key is build plate number, then arrays are stored until they go to the ProcessSlicesLayersJob self._scene = self._application.getController().getScene() self._scene.sceneChanged.connect(self._onSceneChanged) # Triggers for auto-slicing. Auto-slicing is triggered as follows: # - auto-slicing is started with a timer # - whenever there is a value change, we start the timer # - sometimes an error check can get scheduled for a value change, in that case, we ONLY want to start the # auto-slicing timer when that error check is finished # If there is an error check, stop the auto-slicing timer, and only wait for the error check to be finished # to start the auto-slicing timer again. # self._global_container_stack = None # Listeners for receiving messages from the back-end. self._message_handlers["cura.proto.Layer"] = self._onLayerMessage self._message_handlers["cura.proto.LayerOptimized"] = self._onOptimizedLayerMessage 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.PrintTimeMaterialEstimates"] = self._onPrintTimeMaterialEstimates self._message_handlers["cura.proto.SlicingFinished"] = self._onSlicingFinishedMessage self._start_slice_job = None self._start_slice_job_build_plate = None self._slicing = False # Are we currently slicing? self._restart = False # Back-end is currently restarting? self._tool_active = False # If a tool is active, some tasks do not have to do anything self._always_restart = True # Always restart the engine when starting a new slice. Don't keep the process running. TODO: Fix engine statelessness. self._process_layers_job = None # The currently active job to process layers, or None if it is not processing layers. self._build_plates_to_be_sliced = [] # what needs slicing? self._engine_is_fresh = True # Is the newly started engine used before or not? self._backend_log_max_lines = 20000 # Maximum number of lines to buffer self._error_message = None # Pop-up message that shows errors. self._last_num_objects = defaultdict(int) # Count number of objects to see if there is something changed self._postponed_scene_change_sources = [] # scene change is postponed (by a tool) self._slice_start_time = None self._is_disabled = False Application.getInstance().getPreferences().addPreference("general/auto_slice", False) self._use_timer = False # When you update a setting and other settings get changed through inheritance, many propertyChanged signals are fired. # This timer will group them up, and only slice for the last setting changed signal. # TODO: Properly group propertyChanged signals by whether they are triggered by the same user interaction. self._change_timer = QTimer() self._change_timer.setSingleShot(True) self._change_timer.setInterval(500) self.determineAutoSlicing() Application.getInstance().getPreferences().preferenceChanged.connect(self._onPreferencesChanged) self._application.initializationFinished.connect(self.initialize) def initialize(self): self._multi_build_plate_model = self._application.getMultiBuildPlateModel() self._application.getController().activeViewChanged.connect(self._onActiveViewChanged) self._multi_build_plate_model.activeBuildPlateChanged.connect(self._onActiveViewChanged) self._application.globalContainerStackChanged.connect(self._onGlobalStackChanged) self._onGlobalStackChanged() # extruder enable / disable. Actually wanted to use machine manager here, but the initialization order causes it to crash ExtruderManager.getInstance().extrudersChanged.connect(self._extruderChanged) self.backendQuit.connect(self._onBackendQuit) self.backendConnected.connect(self._onBackendConnected) # When a tool operation is in progress, don't slice. So we need to listen for tool operations. self._application.getController().toolOperationStarted.connect(self._onToolOperationStarted) self._application.getController().toolOperationStopped.connect(self._onToolOperationStopped) self._machine_error_checker = self._application.getMachineErrorChecker() self._machine_error_checker.errorCheckFinished.connect(self._onStackErrorCheckFinished) ## Terminate the engine process. # # This function should terminate the engine process. # Called when closing the application. def close(self): # Terminate CuraEngine if it is still running at this point self._terminate() ## Get the command that is used to call the engine. # This is useful for debugging and used to actually start the engine. # \return list of commands and args / parameters. def getEngineCommand(self): json_path = Resources.getPath(Resources.DefinitionContainers, "fdmprinter.def.json") return [Application.getInstance().getPreferences().getValue("backend/location"), "connect", "127.0.0.1:{0}".format(self._port), "-j", json_path, ""] ## Emitted when we get a message containing print duration and material amount. # This also implies the slicing has finished. # \param time The amount of time the print will take. # \param material_amount The amount of material the print will use. printDurationMessage = Signal() ## Emitted when the slicing process starts. slicingStarted = Signal() ## Emitted when the slicing process is aborted forcefully. slicingCancelled = Signal() @pyqtSlot() def stopSlicing(self): self.backendStateChange.emit(BackendState.NotStarted) if self._slicing: # We were already slicing. Stop the old job. self._terminate() self._createSocket() if self._process_layers_job: # We were processing layers. Stop that, the layers are going to change soon. Logger.log("d", "Aborting process layers job...") self._process_layers_job.abort() self._process_layers_job = None if self._error_message: self._error_message.hide() ## Manually triggers a reslice @pyqtSlot() def forceSlice(self): self.markSliceAll() self.slice() ## Perform a slice of the scene. def slice(self): Logger.log("d", "Starting to slice...") self._slice_start_time = time() if not self._build_plates_to_be_sliced: self.processingProgress.emit(1.0) Logger.log("w", "Slice unnecessary, nothing has changed that needs reslicing.") return if self._process_layers_job: Logger.log("d", "Process layers job still busy, trying later.") return if not hasattr(self._scene, "gcode_dict"): self._scene.gcode_dict = {} # see if we really have to slice active_build_plate = Application.getInstance().getMultiBuildPlateModel().activeBuildPlate build_plate_to_be_sliced = self._build_plates_to_be_sliced.pop(0) Logger.log("d", "Going to slice build plate [%s]!" % build_plate_to_be_sliced) num_objects = self._numObjectsPerBuildPlate() self._stored_layer_data = [] self._stored_optimized_layer_data[build_plate_to_be_sliced] = [] if build_plate_to_be_sliced not in num_objects or num_objects[build_plate_to_be_sliced] == 0: self._scene.gcode_dict[build_plate_to_be_sliced] = [] Logger.log("d", "Build plate %s has no objects to be sliced, skipping", build_plate_to_be_sliced) if self._build_plates_to_be_sliced: self.slice() return if Application.getInstance().getPrintInformation() and build_plate_to_be_sliced == active_build_plate: Application.getInstance().getPrintInformation().setToZeroPrintInformation(build_plate_to_be_sliced) if self._process is None: self._createSocket() self.stopSlicing() self._engine_is_fresh = False # Yes we're going to use the engine self.processingProgress.emit(0.0) self.backendStateChange.emit(BackendState.NotStarted) self._scene.gcode_dict[build_plate_to_be_sliced] = [] #[] indexed by build plate number self._slicing = True self.slicingStarted.emit() self.determineAutoSlicing() # Switch timer on or off if appropriate slice_message = self._socket.createMessage("cura.proto.Slice") self._start_slice_job = StartSliceJob.StartSliceJob(slice_message) self._start_slice_job_build_plate = build_plate_to_be_sliced self._start_slice_job.setBuildPlate(self._start_slice_job_build_plate) self._start_slice_job.start() self._start_slice_job.finished.connect(self._onStartSliceCompleted) ## Terminate the engine process. # Start the engine process by calling _createSocket() def _terminate(self): self._slicing = False self._stored_layer_data = [] if self._start_slice_job_build_plate in self._stored_optimized_layer_data: del self._stored_optimized_layer_data[self._start_slice_job_build_plate] if self._start_slice_job is not None: self._start_slice_job.cancel() self.slicingCancelled.emit() self.processingProgress.emit(0) Logger.log("d", "Attempting to kill the engine process") if Application.getInstance().getUseExternalBackend(): return if self._process is not None: Logger.log("d", "Killing engine process") try: self._process.terminate() Logger.log("d", "Engine process is killed. Received return code %s", self._process.wait()) self._process = None except Exception as e: # terminating a process that is already terminating causes an exception, silently ignore this. Logger.log("d", "Exception occurred while trying to kill the engine %s", str(e)) ## Event handler to call when the job to initiate the slicing process is # completed. # # When the start slice job is successfully completed, it will be happily # slicing. This function handles any errors that may occur during the # bootstrapping of a slice job. # # \param job The start slice job that was just finished. def _onStartSliceCompleted(self, job): if self._error_message: self._error_message.hide() # Note that cancelled slice jobs can still call this method. if self._start_slice_job is job: self._start_slice_job = None if job.isCancelled() or job.getError() or job.getResult() == StartSliceJob.StartJobResult.Error: self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) return if job.getResult() == StartSliceJob.StartJobResult.MaterialIncompatible: if Application.getInstance().platformActivity: self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice with the current material as it is incompatible with the selected machine or configuration."), title = catalog.i18nc("@info:title", "Unable to slice")) self._error_message.show() self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) else: self.backendStateChange.emit(BackendState.NotStarted) return if job.getResult() == StartSliceJob.StartJobResult.SettingError: if Application.getInstance().platformActivity: extruders = list(ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())) error_keys = [] for extruder in extruders: error_keys.extend(extruder.getErrorKeys()) if not extruders: error_keys = self._global_container_stack.getErrorKeys() error_labels = set() for key in error_keys: for stack in [self._global_container_stack] + extruders: #Search all container stacks for the definition of this setting. Some are only in an extruder stack. definitions = stack.getBottom().findDefinitions(key = key) if definitions: break #Found it! No need to continue search. else: #No stack has a definition for this setting. Logger.log("w", "When checking settings for errors, unable to find definition for key: {key}".format(key = key)) continue error_labels.add(definitions[0].label) error_labels = ", ".join(error_labels) self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice with the current settings. The following settings have errors: {0}").format(error_labels), title = catalog.i18nc("@info:title", "Unable to slice")) self._error_message.show() self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) else: self.backendStateChange.emit(BackendState.NotStarted) return elif job.getResult() == StartSliceJob.StartJobResult.ObjectSettingError: errors = {} for node in DepthFirstIterator(Application.getInstance().getController().getScene().getRoot()): stack = node.callDecoration("getStack") if not stack: continue for key in stack.getErrorKeys(): definition = self._global_container_stack.getBottom().findDefinitions(key = key) if not definition: Logger.log("e", "When checking settings for errors, unable to find definition for key {key} in per-object stack.".format(key = key)) continue definition = definition[0] errors[key] = definition.label error_labels = ", ".join(errors.values()) self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice due to some per-model settings. The following settings have errors on one or more models: {error_labels}").format(error_labels = error_labels), title = catalog.i18nc("@info:title", "Unable to slice")) self._error_message.show() self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) return if job.getResult() == StartSliceJob.StartJobResult.BuildPlateError: if Application.getInstance().platformActivity: self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice because the prime tower or prime position(s) are invalid."), title = catalog.i18nc("@info:title", "Unable to slice")) self._error_message.show() self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) else: self.backendStateChange.emit(BackendState.NotStarted) if job.getResult() == StartSliceJob.StartJobResult.ObjectsWithDisabledExtruder: self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice because there are objects associated with disabled Extruder %s." % job.getMessage()), title = catalog.i18nc("@info:title", "Unable to slice")) self._error_message.show() self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) return if job.getResult() == StartSliceJob.StartJobResult.NothingToSlice: if Application.getInstance().platformActivity: self._error_message = Message(catalog.i18nc("@info:status", "Nothing to slice because none of the models fit the build volume. Please scale or rotate models to fit."), title = catalog.i18nc("@info:title", "Unable to slice")) self._error_message.show() self.backendStateChange.emit(BackendState.Error) self.backendError.emit(job) else: self.backendStateChange.emit(BackendState.NotStarted) self._invokeSlice() return # Preparation completed, send it to the backend. self._socket.sendMessage(job.getSliceMessage()) # Notify the user that it's now up to the backend to do it's job self.backendStateChange.emit(BackendState.Processing) Logger.log("d", "Sending slice message took %s seconds", time() - self._slice_start_time ) ## Determine enable or disable auto slicing. Return True for enable timer and False otherwise. # It disables when # - preference auto slice is off # - decorator isBlockSlicing is found (used in g-code reader) def determineAutoSlicing(self): enable_timer = True self._is_disabled = False if not Application.getInstance().getPreferences().getValue("general/auto_slice"): enable_timer = False for node in DepthFirstIterator(self._scene.getRoot()): if node.callDecoration("isBlockSlicing"): enable_timer = False self.backendStateChange.emit(BackendState.Disabled) self._is_disabled = True gcode_list = node.callDecoration("getGCodeList") if gcode_list is not None: self._scene.gcode_dict[node.callDecoration("getBuildPlateNumber")] = gcode_list if self._use_timer == enable_timer: return self._use_timer if enable_timer: self.backendStateChange.emit(BackendState.NotStarted) self.enableTimer() return True else: self.disableTimer() return False ## Return a dict with number of objects per build plate def _numObjectsPerBuildPlate(self): num_objects = defaultdict(int) for node in DepthFirstIterator(self._scene.getRoot()): # Only count sliceable objects if node.callDecoration("isSliceable"): build_plate_number = node.callDecoration("getBuildPlateNumber") num_objects[build_plate_number] += 1 return num_objects ## Listener for when the scene has changed. # # This should start a slice if the scene is now ready to slice. # # \param source The scene node that was changed. def _onSceneChanged(self, source): if not isinstance(source, SceneNode): return # This case checks if the source node is a node that contains GCode. In this case the # current layer data is removed so the previous data is not rendered - CURA-4821 if source.callDecoration("isBlockSlicing") and source.callDecoration("getLayerData"): self._stored_optimized_layer_data = {} build_plate_changed = set() source_build_plate_number = source.callDecoration("getBuildPlateNumber") if source == self._scene.getRoot(): # we got the root node num_objects = self._numObjectsPerBuildPlate() for build_plate_number in list(self._last_num_objects.keys()) + list(num_objects.keys()): if build_plate_number not in self._last_num_objects or num_objects[build_plate_number] != self._last_num_objects[build_plate_number]: self._last_num_objects[build_plate_number] = num_objects[build_plate_number] build_plate_changed.add(build_plate_number) else: # we got a single scenenode if not source.callDecoration("isGroup"): if source.getMeshData() is None: return if source.getMeshData().getVertices() is None: return build_plate_changed.add(source_build_plate_number) build_plate_changed.discard(None) build_plate_changed.discard(-1) # object not on build plate if not build_plate_changed: return if self._tool_active: # do it later, each source only has to be done once if source not in self._postponed_scene_change_sources: self._postponed_scene_change_sources.append(source) return self.stopSlicing() for build_plate_number in build_plate_changed: if build_plate_number not in self._build_plates_to_be_sliced: self._build_plates_to_be_sliced.append(build_plate_number) self.printDurationMessage.emit(source_build_plate_number, {}, []) self.processingProgress.emit(0.0) self.backendStateChange.emit(BackendState.NotStarted) # if not self._use_timer: # With manually having to slice, we want to clear the old invalid layer data. self._clearLayerData(build_plate_changed) self._invokeSlice() ## Called when an error occurs in the socket connection towards the engine. # # \param error The exception that occurred. def _onSocketError(self, error): if Application.getInstance().isShuttingDown(): return super()._onSocketError(error) if error.getErrorCode() == Arcus.ErrorCode.Debug: return self._terminate() self._createSocket() if error.getErrorCode() not in [Arcus.ErrorCode.BindFailedError, Arcus.ErrorCode.ConnectionResetError, Arcus.ErrorCode.Debug]: Logger.log("w", "A socket error caused the connection to be reset") ## Remove old layer data (if any) def _clearLayerData(self, build_plate_numbers = set()): for node in DepthFirstIterator(self._scene.getRoot()): if node.callDecoration("getLayerData"): if not build_plate_numbers or node.callDecoration("getBuildPlateNumber") in build_plate_numbers: node.getParent().removeChild(node) def markSliceAll(self): for build_plate_number in range(Application.getInstance().getMultiBuildPlateModel().maxBuildPlate + 1): if build_plate_number not in self._build_plates_to_be_sliced: self._build_plates_to_be_sliced.append(build_plate_number) ## Convenient function: mark everything to slice, emit state and clear layer data def needsSlicing(self): self.stopSlicing() self.markSliceAll() self.processingProgress.emit(0.0) self.backendStateChange.emit(BackendState.NotStarted) if not self._use_timer: # With manually having to slice, we want to clear the old invalid layer data. self._clearLayerData() ## A setting has changed, so check if we must reslice. # \param instance The setting instance that has changed. # \param property The property of the setting instance that has changed. def _onSettingChanged(self, instance, property): if property == "value": # Only reslice if the value has changed. self.needsSlicing() self._onChanged() elif property == "validationState": if self._use_timer: self._change_timer.stop() def _onStackErrorCheckFinished(self): self.determineAutoSlicing() if self._is_disabled: return if not self._slicing and self._build_plates_to_be_sliced: self.needsSlicing() self._onChanged() ## Called when a sliced layer data message is received from the engine. # # \param message The protobuf message containing sliced layer data. def _onLayerMessage(self, message): self._stored_layer_data.append(message) ## Called when an optimized sliced layer data message is received from the engine. # # \param message The protobuf message containing sliced layer data. def _onOptimizedLayerMessage(self, message): if self._start_slice_job_build_plate not in self._stored_optimized_layer_data: self._stored_optimized_layer_data[self._start_slice_job_build_plate] = [] self._stored_optimized_layer_data[self._start_slice_job_build_plate].append(message) ## Called when a progress message is received from the engine. # # \param message The protobuf message containing the slicing progress. def _onProgressMessage(self, message): self.processingProgress.emit(message.amount) self.backendStateChange.emit(BackendState.Processing) def _invokeSlice(self): if self._use_timer: # if the error check is scheduled, wait for the error check finish signal to trigger auto-slice, # otherwise business as usual if self._machine_error_checker is None: self._change_timer.stop() return if self._machine_error_checker.needToWaitForResult: self._change_timer.stop() else: self._change_timer.start() ## Called when the engine sends a message that slicing is finished. # # \param message The protobuf message signalling that slicing is finished. def _onSlicingFinishedMessage(self, message): self.backendStateChange.emit(BackendState.Done) self.processingProgress.emit(1.0) gcode_list = self._scene.gcode_dict[self._start_slice_job_build_plate] for index, line in enumerate(gcode_list): replaced = line.replace("{print_time}", str(Application.getInstance().getPrintInformation().currentPrintTime.getDisplayString(DurationFormat.Format.ISO8601))) replaced = replaced.replace("{filament_amount}", str(Application.getInstance().getPrintInformation().materialLengths)) replaced = replaced.replace("{filament_weight}", str(Application.getInstance().getPrintInformation().materialWeights)) replaced = replaced.replace("{filament_cost}", str(Application.getInstance().getPrintInformation().materialCosts)) replaced = replaced.replace("{jobname}", str(Application.getInstance().getPrintInformation().jobName)) gcode_list[index] = replaced self._slicing = False Logger.log("d", "Slicing took %s seconds", time() - self._slice_start_time ) Logger.log("d", "Number of models per buildplate: %s", dict(self._numObjectsPerBuildPlate())) # See if we need to process the sliced layers job. active_build_plate = Application.getInstance().getMultiBuildPlateModel().activeBuildPlate if ( self._layer_view_active and (self._process_layers_job is None or not self._process_layers_job.isRunning()) and active_build_plate == self._start_slice_job_build_plate and active_build_plate not in self._build_plates_to_be_sliced): self._startProcessSlicedLayersJob(active_build_plate) # self._onActiveViewChanged() self._start_slice_job_build_plate = None Logger.log("d", "See if there is more to slice...") # Somehow this results in an Arcus Error # self.slice() # Call slice again using the timer, allowing the backend to restart if self._build_plates_to_be_sliced: self.enableTimer() # manually enable timer to be able to invoke slice, also when in manual slice mode self._invokeSlice() ## Called when a g-code message is received from the engine. # # \param message The protobuf message containing g-code, encoded as UTF-8. def _onGCodeLayerMessage(self, message): self._scene.gcode_dict[self._start_slice_job_build_plate].append(message.data.decode("utf-8", "replace")) ## Called when a g-code prefix message is received from the engine. # # \param message The protobuf message containing the g-code prefix, # encoded as UTF-8. def _onGCodePrefixMessage(self, message): self._scene.gcode_dict[self._start_slice_job_build_plate].insert(0, message.data.decode("utf-8", "replace")) ## Creates a new socket connection. def _createSocket(self): super()._createSocket(os.path.abspath(os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), "Cura.proto"))) self._engine_is_fresh = True ## Called when anything has changed to the stuff that needs to be sliced. # # This indicates that we should probably re-slice soon. def _onChanged(self, *args, **kwargs): self.needsSlicing() if self._use_timer: # if the error check is scheduled, wait for the error check finish signal to trigger auto-slice, # otherwise business as usual if self._machine_error_checker is None: self._change_timer.stop() return if self._machine_error_checker.needToWaitForResult: self._change_timer.stop() else: self._change_timer.start() ## Called when a print time message is received from the engine. # # \param message The protobuf message containing the print time per feature and # material amount per extruder def _onPrintTimeMaterialEstimates(self, message): material_amounts = [] for index in range(message.repeatedMessageCount("materialEstimates")): material_amounts.append(message.getRepeatedMessage("materialEstimates", index).material_amount) times = self._parseMessagePrintTimes(message) self.printDurationMessage.emit(self._start_slice_job_build_plate, times, material_amounts) ## Called for parsing message to retrieve estimated time per feature # # \param message The protobuf message containing the print time per feature def _parseMessagePrintTimes(self, message): result = { "inset_0": message.time_inset_0, "inset_x": message.time_inset_x, "skin": message.time_skin, "infill": message.time_infill, "support_infill": message.time_support_infill, "support_interface": message.time_support_interface, "support": message.time_support, "skirt": message.time_skirt, "travel": message.time_travel, "retract": message.time_retract, "none": message.time_none } return result ## Called when the back-end connects to the front-end. def _onBackendConnected(self): if self._restart: self._restart = False self._onChanged() ## Called when the user starts using some tool. # # When the user starts using a tool, we should pause slicing to prevent # continuously slicing while the user is dragging some tool handle. # # \param tool The tool that the user is using. def _onToolOperationStarted(self, tool): self._tool_active = True # Do not react on scene change self.disableTimer() # Restart engine as soon as possible, we know we want to slice afterwards if not self._engine_is_fresh: self._terminate() self._createSocket() ## Called when the user stops using some tool. # # This indicates that we can safely start slicing again. # # \param tool The tool that the user was using. def _onToolOperationStopped(self, tool): self._tool_active = False # React on scene change again self.determineAutoSlicing() # Switch timer on if appropriate # Process all the postponed scene changes while self._postponed_scene_change_sources: source = self._postponed_scene_change_sources.pop(0) self._onSceneChanged(source) def _startProcessSlicedLayersJob(self, build_plate_number): self._process_layers_job = ProcessSlicedLayersJob.ProcessSlicedLayersJob(self._stored_optimized_layer_data[build_plate_number]) self._process_layers_job.setBuildPlate(build_plate_number) self._process_layers_job.finished.connect(self._onProcessLayersFinished) self._process_layers_job.start() ## Called when the user changes the active view mode. def _onActiveViewChanged(self): application = Application.getInstance() view = application.getController().getActiveView() if view: active_build_plate = application.getMultiBuildPlateModel().activeBuildPlate if view.getPluginId() == "SimulationView": # If switching to layer view, we should process the layers if that hasn't been done yet. self._layer_view_active = True # There is data and we're not slicing at the moment # if we are slicing, there is no need to re-calculate the data as it will be invalid in a moment. # TODO: what build plate I am slicing if (active_build_plate in self._stored_optimized_layer_data and not self._slicing and not self._process_layers_job and active_build_plate not in self._build_plates_to_be_sliced): self._startProcessSlicedLayersJob(active_build_plate) else: self._layer_view_active = False ## Called when the back-end self-terminates. # # We should reset our state and start listening for new connections. def _onBackendQuit(self): if not self._restart: if self._process: Logger.log("d", "Backend quit with return code %s. Resetting process and socket.", self._process.wait()) self._process = None ## Called when the global container stack changes def _onGlobalStackChanged(self): if self._global_container_stack: self._global_container_stack.propertyChanged.disconnect(self._onSettingChanged) self._global_container_stack.containersChanged.disconnect(self._onChanged) extruders = list(self._global_container_stack.extruders.values()) for extruder in extruders: extruder.propertyChanged.disconnect(self._onSettingChanged) extruder.containersChanged.disconnect(self._onChanged) self._global_container_stack = Application.getInstance().getGlobalContainerStack() if self._global_container_stack: self._global_container_stack.propertyChanged.connect(self._onSettingChanged) # Note: Only starts slicing when the value changed. self._global_container_stack.containersChanged.connect(self._onChanged) extruders = list(self._global_container_stack.extruders.values()) for extruder in extruders: extruder.propertyChanged.connect(self._onSettingChanged) extruder.containersChanged.connect(self._onChanged) self._onChanged() def _onProcessLayersFinished(self, job): del self._stored_optimized_layer_data[job.getBuildPlate()] self._process_layers_job = None Logger.log("d", "See if there is more to slice(2)...") self._invokeSlice() ## Connect slice function to timer. def enableTimer(self): if not self._use_timer: self._change_timer.timeout.connect(self.slice) self._use_timer = True ## Disconnect slice function from timer. # This means that slicing will not be triggered automatically def disableTimer(self): if self._use_timer: self._use_timer = False self._change_timer.timeout.disconnect(self.slice) def _onPreferencesChanged(self, preference): if preference != "general/auto_slice": return auto_slice = self.determineAutoSlicing() if auto_slice: self._change_timer.start() ## Tickle the backend so in case of auto slicing, it starts the timer. def tickle(self): if self._use_timer: self._change_timer.start() def _extruderChanged(self): for build_plate_number in range(self._multi_build_plate_model.maxBuildPlate + 1): if build_plate_number not in self._build_plates_to_be_sliced: self._build_plates_to_be_sliced.append(build_plate_number) self._invokeSlice()