HAVE_PYSIDE = False
try:
from PySide2 import QtCore
HAVE_PYSIDE = True
except ImportError:
pass
_INVOKER = None
if HAVE_PYSIDE:
class InvokeEvent(QtCore.QEvent):
"""
Sends signals to the main QT thread from spawned message threads
See `stackoverflow <https://stackoverflow.com/a/12127115>`_
"""
EVENT_TYPE = QtCore.QEvent.Type(QtCore.QEvent.registerEventType())
def __init__(self, fn, *args, **kwargs):
"""
Accepts a function, its args and kwargs and wraps them as a
:class:`QtCore.QEvent`
"""
QtCore.QEvent.__init__(self, InvokeEvent.EVENT_TYPE)
self.fn = fn
self.args = args
self.kwargs = kwargs
class Invoker(QtCore.QObject):
"""
Wrapper that calls an evoked event made by :class:`.InvokeEvent`
"""
def event(self, event):
"""
Args:
event:
"""
event.fn(*event.args, **event.kwargs)
return True
[docs]def get_invoker():
if not globals()['HAVE_PYSIDE']:
raise Exception("PySide2 could not be imported, no GUI event invoker can be gotten")
if globals()['_INVOKER'] is None:
globals()['_INVOKER'] = Invoker()
return globals()['_INVOKER']