[QGIS-Developer] Catch qgis exit

[Ujaval Gandhi]

The way to achieve this would be to override the closeEvent() method of the
main QGIs Window. I don't know how to do that. But you can do that on your
plugin widget - which will at least prevent that dialog to be closed if
certain conditions are not met.

    def closeEvent(self, event):
      if condition:
        event.accept()
      else:
        event.ignore()
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Ujaval Gandhi
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On Fri, Jun 26, 2020 at 10:02 AM Jan Růžička <jan.ruzicka.vsb at gmail.com>
wrote:

> Thank you very much, the same is possible in the unload method of the
> plugin, but the question is how to stop QGIS to exit.
> I need to inform the user that he did not enter the result of the search
> and keep QGIS open for the user to enter the result.
>
> The possible workaround may be, to run the QGIS again, when it quits, but
> I thought that there may be some better way.
>
> Jan Růžička, Ph.D.
> freelancer, researcher and volontaire
> Geoinformatics
> tel: +420 775 032 091
> e-mail: jan.ruzicka.vsb at gmail.com <http://jan.ruzicka.vsb.cz/>
> http://github.com/ruz76/
> http://gismentors.eu/
> http://dolnilhota.info/
>
>
> Le jeu. 25 juin 2020 à 17:25, Ujaval Gandhi <ujaval at spatialthoughts.com>
> a écrit :
>
>> I saw that there is a aboutToQuit signal emitted just before a
>> QApplication exists. The following works from QGIS Python Console.
>>
>> def test():
>>     with open('/tmp/test.txt', 'w') as f:
>>         f.write('wrote while exiting')
>>
>> qApp.aboutToQuit.connect(test)
>> [image: Logo] <https://spatialthoughts.com/>
>> Ujaval Gandhi
>> Spatial Thoughts
>> mobile: +91-8095684687
>> email: ujaval at spatialthoughts.com
>> [image: LinkedIn icon] <https://www.linkedin.com/in/spatialthoughts/>  [image:
>> Twitter icon] <https://twitter.com/spatialthoughts>
>> Subscribe to our newsletter http://bit.ly/spatialthoughts-newsletter
>>
>>
>> On Thu, Jun 25, 2020 at 5:00 PM Jan Růžička <jan.ruzicka.vsb at gmail.com>
>> wrote:
>>
>>> Dear developers,
>>>
>>> I have developed a plugin for the Police of the Czech Republic for
>>> Search and Rescue operations. It works quite well, but one important
>>> feature is missing.
>>>
>>> After the search event is finished the user should enter the result of
>>> the search.
>>>
>>> I was not able to find a way to catch an event when the user closes the
>>> whole QGIS. I need similar functionality like when closing in the case of a
>>> dirty project (no all changes were saved).
>>>
>>> I have searched a lot and did not find any solution. I was able to catch
>>> the unload event of the plugin, but I did not find a way to keep QGIS
>>> opened.
>>>
>>> Any help appreciated
>>> Jan Růžička, Ph.D.
>>> freelancer, researcher and volontaire
>>> Geoinformatics
>>> tel: +420 775 032 091
>>> e-mail: jan.ruzicka.vsb at gmail.com <http://jan.ruzicka.vsb.cz/>
>>> http://github.com/ruz76/
>>> http://gismentors.eu/
>>> http://dolnilhota.info/
>>> _______________________________________________
>>> QGIS-Developer mailing list
>>> QGIS-Developer at lists.osgeo.org
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>>
>>
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