How to scroll a QChart as realtime data come in

[d_stranz]

Try to step in my shoes for a moment

Like I said, I'm sorry for bringing it up and I apologize for doing so. Qwt5 was great and I was enthusiastic about using it. Moving to Qwt6 would have required me to make big code changes as well as swallow coding conventions that disturbed me at the time, so I chose not to do it. I should have kept my opinions to myself and let others form their own.

So I am sorry and will not mention it again. You have done a great service to the Qt community by adopting Qwt, continuing to improve upon it, and by participating actively in supporting those who want to use it on this forum and elsewhere. You've released it under license terms that allow its use anywhere, and haven't asked for fees for commercial use. It is admirable of you for doing it and your company for allowing you.

But this is a totally different story, one about stable APIs.

It goes beyond stable APIs. Somewhere between Qt 5.4 and later versions, disabled menu items stopped responding to hover events. I was relying on these events to enable / disable menu items based on my application state. When I switched to 5.5 or 5.6 (don't remember) users started to complain that they could no longer do things because the menus were always disabled. So I got stuck on 5.4.1 for a while until I decided to just enable everything and deal with it in other parts of the code.

Probably the Qt organization has had just too many ownership and management changes over the past few years and they have lost some focus in the process. Software is coming out under the Qt banner that isn't well thought-out.

QwtPlot3D

Yes, and it produces nice plots, but it is based on such an old version of OpenGL that it would require nearly a complete rewrite to bring it up to current standards. I don't know if I have tried building it with Qt5, so it might need more than just an OpenGL update.

Anyway, we've hijacked this thread, so maybe we can bury it and move on?

[mustermann.klaus@gmx.de]

Well, harmony is not a save haven. But it is the ocean.
Thanks to both of you for greatly contributing to my knowledge.

[Uwe]

...and your company for allowing you.

Not really important, but for the record: there has never been any company involved. All work being done for Qwt is/was done in free time.

Uwe

[d_stranz]

there has never been any company involved. All work being done for Qwt is/was done in free time.

Some companies in the US, particularly near here in the Silicon Valley, consider anything you do in your free time as their property if it uses the same skills you use on the job. Luckily for you and us that doesn't seem to be the case with Qwt.

Qwt3d - I don't know if I have tried building it with Qt5, so it might need more than just an OpenGL update.

After some effort, it does build and the examples run with Qt5 (64-bit Qt 5.9.0 MSVC on Windows to be precise). The last update was over 10 years ago. If I can find the free time, I might adopt it and bring it into the modern age.

[Uwe]

After some effort, it does build and the examples run with Qt5 (64-bit Qt 5.9.0 MSVC on Windows to be precise). If I can find the free time, ...

That would be cool - let me know if you need some support from the Qwt related part.

By the way: Guðjón finished his work on the Qwt python wrapper ( https://github.com/GauiStori/PyQt-Qwt ) and with an updated version of QwtPlot3d he might be interested to do the same for QwtPlot3D. Then we would have everything back, that existed for Qt4/Qwt5.

Uwe