Decide on signal bars

[infirit]

With bluetooth LE we do not have signal bars. The problem afaics is that we do not have tpl, lq and rss. We do have an rssi property in the dbus api but it is only available during discovery.

While it has been a big part of blueman the simplest would be drop them and instead have an indicator showing if the device is connected. I can add the indicator on top of the bars as well but this will make the ui inconsistent between LE and non LE devices.

Opinions, suggestions, complaints :-)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[cschramm]

My opinions on this:

• Connection indicator definitely makes sense
• Inconsistent UI between LE and non LE is fine

The only way to avoid the inconsistency seems to be to not use the information we have for non LE devices. The signal bars are probably not that useful to most users, but I'd not downgrade that UI for consistency reasons.

[infirit]

I used an image upscaler (waify2x) and the result is pretty good. Imho this looks good enough for Gdk scaling. I'll do them all tomorrow and test it out.

[infirit]

Here is the result with GDK_SCALE=2. It is pretty amazing how well this ai upscaler works 😲 . I'll open a PR for this.

[infirit]

I'm leaning towards using using a Gtk.LevelBar as seen in #1768. But this requires quite a bit of work replacing the TreeView.