New OWEwoksWidget to run tasks in a process

[poautran]

In GitLab by @loichuder on Jan 23, 2026, 15:09 GMT+1:

OWEwoksWidgetOneThread is a great abstraction allowing to run the task in a thread. This gives an easy way of having a responsive GUI while the task is running.

Unfortunately, threads cannot be killed so aborting/canceling the task is tricky.

I would propose to create a new Orange Ewoks widget to run the tasks in a multiprocess.Process instead. With a bit a care, processes can be killed to cancel ongoing tasks. This new widget could provide a nice abstraction like OWEwoksWidgetOneThread so that ewoksapps devs do not need to deal with implementation details.

Thoughts @woutdenolf @payno ?

Migrated from GitLab: https://gitlab.esrf.fr/workflow/ewoks/ewoksorange/-/issues/82

[poautran]

In GitLab by @woutdenolf on Jan 23, 2026, 15:32 GMT+1:

Yes please. I think I proposed this already but got rejected.

[poautran]

In GitLab by @loichuder on Jan 23, 2026, 15:37 GMT+1:

For the record, here are two working process-based executors (courtesy of @tvincent):

• Based on Qobject: https://gitlab.esrf.fr/levantin/txs/-/blob/master/txs/app/ProcessWorker.py?ref_type=heads
• Based on Future: https://gitlab.esrf.fr/ui/tomovis/-/blob/main/tomovis/subprocess_executor.py?ref_type=heads