Re: [Jython-users] Swing JButton dispatch long processes on thread?

[Jeff E. <jem...@fr...>]

Oops, asyncExec is a function from another GUI toolkit.  You
want invokeLater.

Jeff Emanuel wrote:
> Beware that updating the GUI from a thread other than
> the event thread can fail or cause corruption.  You
> may need to do self.refresh() in asyncExec.
> 
> 
> DOUTCH GARETH-GDO003 wrote:
>> Many thanks to all who replied.
>> This comment by Jeff Emanuel was the clue that I needed.
>> In the end the fix looked like this:
>>
>> class SomePanel(swing.JPanel)
>>     def buildUI(self):
>>         self.add(swing.JButton('Update', actionPerformed=self.update))
>>
>>     def update(self, event):
>>         import threading
>>         t = threading.Thread(target=self.__update)
>>         t.start()
>>    
>>     def __update(self):
>>         self.safety(True)	# disable the ui from further inputs
>>         long_running_process()	# run the long process
>>         self.refresh()		# update with fresh info from the
>> process
>>         self.safety(False)	# re-able the ui for further inputs
>>
>> And that works!
>>
>> Regards,
>> Gareth
>>
>>
>>
>> -----Original Message-----
>> From: Jeff Emanuel [mailto:jem...@fr...] 
>> Sent: 07 February 2008 18:22
>> To: DOUTCH GARETH-GDO003
>> Cc: jyt...@li...
>> Subject: Re: [Jython-users] Swing JButton dispatch long processes on
>> thread?
>>
>> join() blocks until the thread completes.
>>
>> DOUTCH GARETH-GDO003 wrote:
>>> Hi,
>>>  
>>> Want to dispatch a long running process from a JButton and while it is
>>> running:
>>> * release the JButton from it's depressed state
>>> * update my UI into a 'busy / wait' state until the process finishes 
>>> when I will return my UI into it's normal state.
>>>  
>>> But there's something basic that I am missing here, can anyone help?
>>>  
>>> Regards,
>>> Gareth
>>>  
>>>  
>>> Samples of my have attempts:
>>>  
>>> class SomePanel(swing.JPanel)
>>>     def buildUI(self):
>>>         self.add(swing.JButton('Update', actionPerformed=self.update))
>>>
>>>     def update(self, event):
>>>         import threading       
>>>         self.safety(True) # disable the ui from further inputs
>>>         t = threading.Thread(target=long_running_process)
>>>         t.start()
>>>         t.join()
>>>         self.refresh()  # update with fresh info from the process
>>>
>>>         self.safety(False) # restore user inputs
>>>
>>>
>>> and
>>>
>>>     def update(self, event):
>>>         self.safety(True) # disable the ui from further inputs
>>>         long_running_process()
>>>         self.refresh()  # update with fresh info from the process
>>>
>>>         self.safety(False) # restore user inputs
>>>
>>>
>>>
>>>
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