[DO NOT MERGE] attempt at adding on_hover_drag event (fix #866)

[Arnaudv6]

cpp junior here. I gave #866 a shot, but I am stuck here

Remove the return statement to try and use thread_ for a delay: this crashes. I'd appreciate any help.

[Arnaudv6]

Hi there, I'd like to know if there is any plans to port waybar to gtkmm4? As this changes dnd[1], and I want to give this MR another look. [1] https://docs.gtk.org/gtk4/drag-and-drop.html#drop-targets

[ErikReider]

Hi there, I'd like to know if there is any plans to port waybar to gtkmm4?

Gtk 4 doesn't support the layershell protocol

[Arnaudv6]

Thanks @ErikReider for the tip (gtk-layer-shell/#37) Is there ongoing discussion on a strategy/future for Waybar, should this port never happen?

[Alexays]

Closing in favor of #1747

[Alexays]

Not same problem, sorry

[bi4k8]

I can give some guidance on implementing this if desired--sorry to have introduced merge conflicts with this!

[Arnaudv6]

@bi4k8 yes, any help welcome!