VTK VS birdtray

You are referring to the Visualization Toolkit right? Looking at that it appears to be actively maintained stilled I think. https://github.com/Kitware/VTK

While this example is outdated: https://github.com/Kitware/VTK/blob/master/Wrapping/Python/vtkmodules/gtk/GtkGLExtVTKRenderWindow.py

> Inability to minimize to tray on Linux

Birdtray [1] works perfectly for this. I think the only thing you have to is create a .desktop file that opens birdtray that opens Thunderbird automatically.

> Inability to easily edit the from address

There is a feature for this for quite a while. In the write message window, just click the down arrow next to 'From' and either choose a pre-configured identity [2] or click "Customize From Address" which allows you to freely edit the from address.

> And TB still doesn't "remember" which -from- addresses are used by which -to- address.

Not sure what you mean, but there is a 'Reply from this identity when delivery headers match' config in account settings. I have never used it, but it allows you to automatically choose an identity when you are replying to a email from a particular address/domain.

[1] https://github.com/gyunaev/birdtray

[2] You can customize as many identities as possible for each server.

You could try birdtray and have a combined calendar and email tray icon. You would kill two birds with one stone if you know what I mean :)

Take a look at Birdtray

There is standalone Qt app https://github.com/gyunaev/birdtray that achieves that by parsing data from Thunderberd's profile.

Thanks for the suggestion, but since the feature landed for Windows for a while now, I would prefer a native solution. Add-ons tend to break after TB major releases and Birdtray has also its problems like Wayland support.

I recently came across Birdtray. It shows unread emails and I can click on it to hide/show Thunderbird. However, if I click again to show the Thunderbird window, I must check the 'Always On Top' box on the Thunderbird window again. If I minimise Thunderbird from it's own minimise window setting - it retains the 'Always On Top' setting - but then takes up space in the panel.

Birdtray* did the trick for me! It's quite useful and the difference from a proper tray integration is almost inoticeable! I have tried kdocker but didn't like it.

releases: https://github.com/gyunaev/birdtray/releases/tag/v1.9.0