70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
# ########################################################## ##
|
|
# FlatCAM: 2D Post-processing for Manufacturing #
|
|
# http://flatcam.org #
|
|
# Author: Juan Pablo Caram (c) #
|
|
# Date: 2/5/2014 #
|
|
# MIT Licence #
|
|
# ########################################################## ##
|
|
|
|
from PyQt5 import QtCore
|
|
import traceback
|
|
|
|
|
|
class Worker(QtCore.QObject):
|
|
"""
|
|
Implements a queue of tasks to be carried out in order
|
|
in a single independent thread.
|
|
"""
|
|
|
|
# avoid multiple tests for debug availability
|
|
pydevd_failed = False
|
|
task_completed = QtCore.pyqtSignal(str)
|
|
|
|
def __init__(self, app, name=None):
|
|
super(Worker, self).__init__()
|
|
self.app = app
|
|
self.name = name
|
|
|
|
def allow_debug(self):
|
|
"""
|
|
allow debuging/breakpoints in this threads
|
|
should work from PyCharm and PyDev
|
|
:return:
|
|
"""
|
|
|
|
if not self.pydevd_failed:
|
|
try:
|
|
import pydevd
|
|
pydevd.settrace(suspend=False, trace_only_current_thread=True)
|
|
except ImportError:
|
|
self.pydevd_failed = True
|
|
|
|
def run(self):
|
|
|
|
# self.app.log.debug("Worker Started!")
|
|
|
|
self.allow_debug()
|
|
|
|
# Tasks are queued in the event listener.
|
|
self.app.worker_task.connect(self.do_worker_task)
|
|
|
|
def do_worker_task(self, task):
|
|
|
|
# self.app.log.debug("Running task: %s" % str(task))
|
|
|
|
self.allow_debug()
|
|
|
|
if ('worker_name' in task and task['worker_name'] == self.name) or \
|
|
('worker_name' not in task and self.name is None):
|
|
|
|
try:
|
|
task['fcn'](*task['params'])
|
|
except Exception as e:
|
|
self.app.thread_exception.emit(e)
|
|
print(traceback.format_exc())
|
|
# raise e
|
|
finally:
|
|
self.task_completed.emit(self.name)
|
|
|
|
# self.app.log.debug("Task ignored.")
|