Request for egui_plot::PlotItem to have + Send added

help
1

Hello please can the designers of Egui_plot add "+ Send" to PlotItem, as I (and no doubt many others) need to send PlotItem (x,y) points across threads, which currently cannot be done. I need it so as to be able to use a separate thread for drawing my oscilloscope trace. Without using threads, my Raspberry Pi Rust oscilloscope code is working albeit far too slowly! Many thanks

2

It looks like PlotItem is a trait. If you need a type-erased PlotItem that is Send, use dyn PlotItem + Send instead of just dyn PlotItem. If you're using other types that implement PlotItem, whether they are Send or not is a property of the type, not their implementation of PlotItem. It would be a breaking change for the PlotItem trait to require Send.

If you still have a request for a change to the library, the appropriate way to ask is to create an issue in the repo.

4 Likes
3

I've tried everything to make PlotItem "+ Send" and nothing works, so the library needs to be updated and I have now requested this via an issue in the repo as you stated, many thanks, I hope action is taken on this!

4

That is very unlikely. I suggest you look into other solutions to speed up your code.

5

The only other solution would be to use a different crate which DOES implement "+ Send" as it's essential to use threading to achieve the processing speed/ a fast oscilloscope trace.

6

You could also try an earlier version of egui_plot. They have recently changed the PlotPoints implementation which might have removed the Send trait.

7

ah thankyou! I'll give that a try. Looks like you're using egui_plot also! Many thanks, will reply later after I've torn the last of my hair out trying to fix this! :wink:

8

i've yet to find an earlier version of egui_plot where the Send trait is implemented. I've just tried the latest version (I was using the previous) and they seem to have changed things for the worse; the LINE draw doesn't work at all, so I'm at a dead end now. It's essential that I use threading for generating my oscilloscope trace as without it, it's painfully slow. The only other way is to go async. I'm also finding that a lot of the online AI generated Rust examples are full of errors and totally detrimental to my learning process!

9

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