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Fix call_on_qt_thread decorator

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CURA-6225

Do thread check in the wrapper function, not outside.
This commit is contained in:
Lipu Fei 2019-02-15 15:11:09 +01:00
parent ace638ec81
commit f521fae152
2 changed files with 13 additions and 2 deletions
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9
cura/Utils/Threading.py
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@ -1,3 +1,4 @@
import functools
import threading
from cura.CuraApplication import CuraApplication
@ -6,7 +7,7 @@ from cura.CuraApplication import CuraApplication
#
# HACK:
#
# In project loading, when override the existing machine is selected, the stacks and containers that are correctly
# In project loading, when override the existing machine is selected, the stacks and containers that are currently
# active in the system will be overridden at runtime. Because the project loading is done in a different thread than
# the Qt thread, something else can kick in the middle of the process. One of them is the rendering. It will access
# the current stacks and container, which have not completely been updated yet, so Cura will crash in this case.
@ -22,7 +23,13 @@ class InterCallObject:
def call_on_qt_thread(func):
@functools.wraps(func)
def _call_on_qt_thread_wrapper(*args, **kwargs):
# If the current thread is the main thread, which is the Qt thread, directly call the function.
current_thread = threading.current_thread()
if isinstance(current_thread, threading._MainThread):
return func(*args, **kwargs)
def _handle_call(ico, *args, **kwargs):
ico.result = func(*args, **kwargs)
ico.finish_event.set()

6
plugins/UFPWriter/UFPWriter.py
View File

@ -44,8 +44,12 @@ class UFPWriter(MeshWriter):
# trigger loading other containers. Because those loaded containers are QtObjects, they must be created on the
# Qt thread. The File read/write operations right now are executed on separated threads because they are scheduled
# by the Job class.
@call_on_qt_thread
def write(self, stream, nodes, mode = MeshWriter.OutputMode.BinaryMode):
print("------------> self _write = ", self._write)
return self._write(stream, nodes, mode = mode)
@call_on_qt_thread
def _write(self, stream, nodes, mode = MeshWriter.OutputMode.BinaryMode):
archive = VirtualFile()
archive.openStream(stream, "application/x-ufp", OpenMode.WriteOnly)