Fix autoScale in scale_engine.py

[nicoddemus]

The original code in qwt_scale_engine.cpp was setting the stepSize to zero.

Not sure the reason why this was changed, perhaps by accident?

Opening this for your consideration. 👍

[PierreRaybaut]

The original code in qwt_scale_engine.cpp was setting the stepSize to zero.

Not sure the reason why this was changed, perhaps by accident?

Opening this for your consideration. 👍

Actually the original code when PythonQwt was initiated was consistent with this implementation.

But, why not upgrade? 👍

[PierreRaybaut]

By the way, have you tested this with a real world example?

[nicoddemus]

By the way, have you tested this with a real world example?

I'm in the process of migrating our internal plots library from PyQwt to PythonQwt, and this patch was used successfully by an ex-colleague of mine, so I can say with 99% confidence that it works -- but I did not managed to get our internal library working yet to validate this myself.

[PierreRaybaut]

By the way, have you tested this with a real world example?

I'm in the process of migrating our internal plots library from PyQwt to PythonQwt, and this patch was used successfully by an ex-colleague of mine, so I can say with 99% confidence that it works -- but I did not managed to get our internal library working yet to validate this myself.

Let me know when you're finished and I'll release a new version of PythonQwt right away.

[nicoddemus]

Let me know when you're finished and I'll release a new version of PythonQwt right away.

Thanks, appreciate the prompt support!

Actually I would appreciate a new release with those two patches if you have the time to spare, as I'm marking some tests with @pytest.mark.skip because of this bug, and I won't be able to merge until those are resolved.

Of course, technically I could use a development version, but this is not so simple to do because we use conda internally, and it is not as easy to use a development version as if we were using pip.

[PierreRaybaut]

OK, that is done.

[nicoddemus]

Thanks, really appreciate it! 🙇‍♂️

[PierreRaybaut]

You're welcome 🙂