[QGIS-Developer] Updating interfaces

[Nyall Dawson]

On Mon, 27 May 2024, 5:54 pm Pedro Camargo via QGIS-Developer, <
qgis-developer at lists.osgeo.org> wrote:

> Hello fellow QGIS'ers.
>
> I have a (new to me) problem in my hands.
>
> I am building an interface to run a large transportation simulation model (
> Polaris <https://polaris.taps.anl.gov/polaris-studio/index.html>) from a
> QGIS plugin, and I would like to update the interface as the simulation
> progresses.
>
> The issue here is that this simulation is done inside a compiled C++
> executable from which I cannot emit any QT signals, so I have to do it
> "manually" by processing the logfile generated by the application.
>
> I currently don't see a way to do this, as the calling the simulation
> processes captures the GIL and I can't update the interface, but is there
> another way of doing this?
>
> I am at a bit of a loss, so I appreciate any pointers.
>

I'd suggest following the approach used by the GDAL processing algorithms.
See

https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/gdal/GdalUtils.py#L146

Nyall



> Cheers,
> Pedro
>
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