Hello @pekkaklarck, what do you think about the idea of switching from Tkinter to Flet (https://flet.dev/) which provides a better styling and design options ?

I don't think it's a good idea with the version distributed with Robot. It would be fine if you'd create an external library for this purpose.

Thanks for your feedback! Could you clarify what you mean by creating an external library for this purpose? Are you suggesting a standalone package that integrates with Robot Framework, or something else? I'd appreciate any guidance on the best approach since i would love to start contributing to the project after the wonderful experience at the Robocon 2025.

PR #5333 implements this.

@LucianCrainic Yes, I meant creating an external library. It could have same keywords as the standard Dialogs to make switching to it easy, but it could also get new keywords if there are needs. New keywords could then possibly be ported to Dialogs if they are generally useful and its technically feasible.

I reviewed PR #5333 and it turned out to have various technical problems. The problems are due to the PR trying to workaround Tkinter styling limitations (e.g. styling the title native title bar isn't possible) and they seem to be way bigger than the benefits. My current thinking is that we should limit style changes to these:

• Background color. We could easily set background to one of Robot's "official" colors (black, white, turquoise), but it is somewhat questionable is that useful. I started a thread and a poll about this on the #devel channel on our Slack and most of the first poll respondents prefer the native style (i.e. making no changes).
• Padding. Dialogs can be made better looking by adding padding around elements.
• Increase font size a bit. The current font size is pretty small.
• Application and taskbar icon. We could use our normal logo here.

My plan to go forward with this is:

• Commit padding and font-size changes. I'll probably make the background color easy to change at the same time, but leave it to the native style for now.
• Add icons.
• Wait for options about the background color and possible other style enhancements on #devel. Comments are appreciated here as well.
• Close PR Styling dialogs #5333. Sorry for that @Alpha-Centauri-00, but the complexity and the problems caused by it aren't worth the benefits.Thanks anyway for starting the discussion about style enhancements and looking forward for your opinions.

I've done all enhancements I planned to do. The image below shows new and old dialogs on Windows, and I consider the new one better in many ways. I've also tested this on Linux and OSX and everything seems to work fine.

@d-biehl has made even more changes in PR #5381. We need to still decide do we want to incorporate them, or part of them, before closing this issue. We can also close this and do more style enhancements in RF 7.4.

Let's close this and consider more enhancements later.