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How do you make terminal interfaces all fancy looking? (lemmy.ca)
submitted 2 months ago by a_gee_dizzle@lemmy.ca to c/learn_programming@programming.dev
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Some terminal applications are positively deluxe. Completely decked out. Here are some examples (these are all screenshots from my terminal emulator):

!

So my question is: how do I design a terminal application to look like that?

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[–] e0qdk@reddthat.com 15 points 2 months ago (1 children)

I have only the most basic experience digging into that stuff -- from quite a while ago -- but the keywords I think you need to search for to find out more info about this are: escape codes, TUI (i.e. Text User Interface), and curses.

The last is an old library for implementing TUIs. There's successors like ncurses as well. I don't know what people actually use currently though.

[–] a_gee_dizzle@lemmy.ca 7 points 2 months ago

Thank you

[–] BartyDeCanter@piefed.social 15 points 2 months ago (1 children)

Most languages have a fancy TUI library nowadays that makes it pretty easy. Here are a few:

The difficult parts are generally:

  1. Designing what it should look like
  2. Dealing with all the interaction options
  3. Making it all discoverable for your users
[–] a_gee_dizzle@lemmy.ca 3 points 2 months ago (2 children)

Dealing with all the interaction options

Yeah. Is it even possible to have adapt if a user changes the size of their window? Window resizing often seems to break these graphics

Making it all discoverable for your users

Why do you consider this an issue specifically?

[–] BartyDeCanter@piefed.social 5 points 2 months ago (1 children)

Generally, yes, adapting to the size of the window is pretty easy. Most of those libraries have a layout engine, so you define the size of things relative to the size of the window and each other, then the layout engine takes care of the rest.

As for discoverability, well, it’s a hard issue in all UI schemes, and tends to be particularly difficult in CLI/TUI applications due to layout and input constraints. In a GUI application users can click on buttons, scroll, and generally figure things out. For a tui, there are probably going to be a large number of (possibly reconfigurable) keyboard shortcuts and maybe some sort of command system. How you let the user know about all of them without having to memorize a giant table can be difficult. The common options I’ve seen are a “?” popup (lazygit), a context-aware small popup during multi-key commands (helix), a command palette with search (lots), a top menu bar with accelerator keys (old school WordPerfect), or a bottom bar with context available options (lots). They all have their respective tradeoffs, and can make something go from “useable after hours of practice and reading” to “oh, this is intuitive!”.

[–] a_gee_dizzle@lemmy.ca 1 points 2 months ago

For a tui, there are probably going to be a large number of (possibly reconfigurable) keyboard shortcuts and maybe some sort of command system. How you let the user know about all of them without having to memorize a giant table can be difficult.

That makes sense. In my case I’m looking to play around with the reticulum network / nomandnet so in that case the user would already be knee deep in the tui, so these issues could hopefully be avoided

[–] e0qdk@reddthat.com 3 points 2 months ago

Yes. htop does it, for example.

[–] one_old_coder@piefed.social 5 points 2 months ago (1 children)

Try https://charm.land/, it's in the Go language.

[–] a_gee_dizzle@lemmy.ca 2 points 2 months ago

Thanks!

[–] rbos@lemmy.ca 4 points 2 months ago (1 children)

What is that first screenshot? With the planet game.

[–] a_gee_dizzle@lemmy.ca 1 points 2 months ago

It’s a game I found in the reticulum network. I can try and find the specific reticulum address later if you’re interested