How to block python running using PythonQt #187

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1. he-hesce commented on Feb 2, 2024

   

   he-hesce

   on Feb 2, 2024

   Last edited by he-hesce

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   There are multiple ways of doing this of course, What solution you prefer depends on how you design and use Qt and object-orientation in general. However, a simply dirty way it so put a wait before CloseProject where you either wait for the QProcess::finished signal emitted from somewhere (so you would need to have it available) or perhaps just do a wait loop like below. The way I usually block until something is finished is this way:

   from PythonQt import QtCore
   GenerateMesh()
   self._waitLoop = QtCore.QEventLoop()
   # QtCore.QTimer.singleShot(5000, self._waitLoop.quit)  # Stop waiting after 5 seconds
   returnCode = waitLoop.exec_()
   self._waitLoop = None
   if returnCode == 0:
     CloseProject(True)
   else: 
     CloseProject(False)
   

   and then call self._waitLoop.exit(0) either connected to QProcess::finished or from where you handle it. You might of course also want to put a single shot timer on it so make sure you program doesn't hang forever in case QProcess::finished is never signaled - it's in the commented out line above.
2. MeVisLab

   locked and limited conversation to collaborators on Feb 2, 2024
3. mrbean-bremen

   converted this issue into a discussion #188 on Feb 2, 2024