On 24 May 2016 at 19:53, Marco Bernasocchi <[email protected]> wrote: > Hi Richard, I alvays wanted to make a blog post out of this: > https://github.com/mbernasocchi/pyqtExperiments/blob/master/qgis_thread_example.py > > I use message bars in theads there and never had issues. > > maybe it helps.
Marco - interesting stuff! Have you seen this PR yet? https://github.com/qgis/QGIS/pull/3004 Looks like we share some common implementation details, so I'd be keen to hear your thoughts on that proposed design. Nyall > > ciao > Marco > > On 24.05.2016 10:48, Richard Duivenvoorde wrote: >> >> Busy with a plugin which retrieves (in separate threads) a lot of data >> from 2 w*s services. >> >> I thought to use the QgsMessageBar to show progress of the (two) >> download processes, but stumbled on (I think) a problem: >> >> - from api docs: https://qgis.org/api/classQgsMessageBar.html#details >> The message bar will take ownership of the item... >> >> My problem now is that (I think) my progressbars (which were place in a >> QgsMessageBar-item-widget) are sometimes deleted although I still want >> to use them... >> >> For example: an user can click the little 'x' button in the messagebar >> to clean up all messages. >> Or a python dev can call 'clean all widgets'. >> >> BUT at that moment a progressbar part of a messagebaritem is (at least >> in cpp world) apparently deleted. >> Meaning, if (in the python world) I set a progress value on it, I get a >> nice clean segmentation fault.... >> >> I managed to work around this by NOT putting the progress bars in the >> messagebar (but put small ones in the plugin toolbar), but as several >> examples flow around on Google, I thought to speak out. >> >> Should we just not let people do this? >> >> Or was I using the messagebar for things I was not supposed to use if for? >> >> Or should we make an option to add a 'special' widget to the messagebar, >> which is NOT removed using clearWidgets() (either via Python or via >> x-button)? >> >> Regards, >> >> Richard >> _______________________________________________ >> Qgis-developer mailing list >> [email protected] >> List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer >> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer > > -- > Marco Bernasocchi > OPENGIS.ch - berna.io - 27summits.ch > _______________________________________________ > Qgis-developer mailing list > [email protected] > List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list [email protected] List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer
