def cura_app_mock():
# Taken from cura_app.py
import Arcus
import Savitar
if Platform.isLinux():
try:
import ctypes
from ctypes.util import find_library
libGL = find_library("GL")
ctypes.CDLL(libGL, ctypes.RTLD_GLOBAL)
except:
pass
if Platform.isLinux() and getattr(sys, "frozen", False):
old_env = os.environ.get("LD_LIBRARY_PATH", "")
# This is where libopenctm.so is in the AppImage.
search_path = os.path.join(CuraApplication.getInstallPrefix(), "bin")
path_list = old_env.split(":")
if search_path not in path_list:
path_list.append(search_path)
os.environ["LD_LIBRARY_PATH"] = ":".join(path_list)
import trimesh.exchange.load
os.environ["LD_LIBRARY_PATH"] = old_env
sys.argv.clear()
sys.argv.append("smartslicetests")
sys.argv.append("--headless")
return CuraApplication()
def __init__(self) -> None:
super().__init__()
# 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(CuraApplication.getInstallPrefix(), "bin", executable_name)):
default_engine_location = os.path.join(CuraApplication.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 cast(str, 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 = CuraApplication.getInstance() #type: CuraApplication
self._multi_build_plate_model = None #type: Optional[MultiBuildPlateModel]
self._machine_error_checker = None #type: Optional[MachineErrorChecker]
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)
self._application.getPreferences().addPreference("backend/location", default_engine_location)
# Workaround to disable layer view processing if layer view is not active.
self._layer_view_active = False #type: bool
self._onActiveViewChanged()
self._stored_layer_data = [] # type: List[Arcus.PythonMessage]
self._stored_optimized_layer_data = {} # type: Dict[int, List[Arcus.PythonMessage]] # key is build plate number, then arrays are stored until they go to the ProcessSlicesLayersJob
self._scene = self._application.getController().getScene() #type: Scene
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 #type: Optional[ContainerStack]
# 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 #type: Optional[StartSliceJob]
self._start_slice_job_build_plate = None #type: Optional[int]
self._slicing = False #type: bool # Are we currently slicing?
self._restart = False #type: bool # Back-end is currently restarting?
self._tool_active = False #type: bool # If a tool is active, some tasks do not have to do anything
self._always_restart = True #type: bool # Always restart the engine when starting a new slice. Don't keep the process running. TODO: Fix engine statelessness.
self._process_layers_job = None #type: Optional[ProcessSlicedLayersJob] # The currently active job to process layers, or None if it is not processing layers.
self._build_plates_to_be_sliced = [] #type: List[int] # what needs slicing?
self._engine_is_fresh = True #type: bool # Is the newly started engine used before or not?
self._backend_log_max_lines = 20000 #type: int # Maximum number of lines to buffer
self._error_message = None #type: Optional[Message] # Pop-up message that shows errors.
self._last_num_objects = defaultdict(int) #type: Dict[int, int] # Count number of objects to see if there is something changed
self._postponed_scene_change_sources = [] #type: List[SceneNode] # scene change is postponed (by a tool)
self._slice_start_time = None #type: Optional[float]
self._is_disabled = False #type: bool
self._application.getPreferences().addPreference("general/auto_slice", False)
self._use_timer = False #type: bool
# 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() #type: QTimer
self._change_timer.setSingleShot(True)
self._change_timer.setInterval(500)
self.determineAutoSlicing()
self._application.getPreferences().preferenceChanged.connect(self._onPreferencesChanged)
self._application.initializationFinished.connect(self.initialize)
# first seems to prevent Sip from going into a state where it
# tries to create PyQt objects on a non-main thread.
import Arcus #@UnusedImport
import Savitar #@UnusedImport
from cura.CuraApplication import CuraApplication
# WORKAROUND: CURA-6739
# The CTM file loading module in Trimesh requires the OpenCTM library to be dynamically loaded. It uses
# ctypes.util.find_library() to find libopenctm.dylib, but this doesn't seem to look in the ".app" application folder
# on Mac OS X. Adding the search path to environment variables such as DYLD_LIBRARY_PATH and DYLD_FALLBACK_LIBRARY_PATH
# makes it work. The workaround here uses DYLD_FALLBACK_LIBRARY_PATH.
if Platform.isOSX() and getattr(sys, "frozen", False):
old_env = os.environ.get("DYLD_FALLBACK_LIBRARY_PATH", "")
# This is where libopenctm.so is in the .app folder.
search_path = os.path.join(CuraApplication.getInstallPrefix(), "MacOS")
path_list = old_env.split(":")
if search_path not in path_list:
path_list.append(search_path)
os.environ["DYLD_FALLBACK_LIBRARY_PATH"] = ":".join(path_list)
import trimesh.exchange.load
os.environ["DYLD_FALLBACK_LIBRARY_PATH"] = old_env
# WORKAROUND: CURA-6739
# Similar CTM file loading fix for Linux, but NOTE THAT this doesn't work directly with Python 3.5.7. There's a fix
# for ctypes.util.find_library() in Python 3.6 and 3.7. That fix makes sure that find_library() will check
# LD_LIBRARY_PATH. With Python 3.5, that fix needs to be backported to make this workaround work.
if Platform.isLinux() and getattr(sys, "frozen", False):
old_env = os.environ.get("LD_LIBRARY_PATH", "")
# This is where libopenctm.so is in the AppImage.
search_path = os.path.join(CuraApplication.getInstallPrefix(), "bin")
