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Nice project! I would love to use it (it looks stunning!). However for my use case I want to run the checkbox prompt with some items pre-selected. I think this is common enough to fit the checkbox preset.

existing work:
dialoguer has MultiSelect::items_checked.

Hi,

I'm trying to run the second example (the first one works), and I receive the following compilation error:

error[E0432]: unresolved import `promkit::selectbox`
 --> src/main.rs:6:55
  |
6 |     build::Builder, crossterm::style, Result, select, selectbox::SelectBox
  |                                                       ^^^^^^^^^ could not find `selectbox` in `promkit`

I'm working on version 0.1.1 on rust 1.62

Right now the filter functions gets the stringified items as an argument. Would it be possible to receive the items slice instead? It would make filtering in my case easier, since my data is structured.

Since type Validator<T> = fn(&T) -> bool;, i can't do something like:

let existing_filenames = read_dir(...);

Readline::default()
    .title("Name new file:")
    .validator(|name| !existing_filenames.contains(name.to_string()), |name| format!("File {} already exists", name))
    .prompt()?
    .run()?;

Suggest swapping this to something like type Validator<T> = Box<dyn Fn(&T) -> bool>;

Thank you for making this library, it looks very nice!

Unfortunately, fake_input uses os::unix, preventing compilation on Windows.

I don't know if what fake_input does is possible in a cross-platform fashion, but since it appears to be a utility for testing, and not essential to the library itself, maybe the module could, for now, be omitted on Windows via cfg?

I would like to easily annotate a configuration struct, to ask the user for input for various fields and give a hint on validation:

use derive_bla::AskUser;

#[derive(Debug, AskUser)]
struct MyConf {
    #[ask(q="Please enter password:", hide_input=true, min_len=12)]
    password: Option<String>,

    #[ask(q="Please enter username:", min_len=3)]
    username: Option<String>,

    #[ask(q="Please enter age:", range=18..=85)]
    age: Option<u8>,
}

fn main() -> Result<()> {
    let mut conf = MyConf::default()
    conf.password()?.validate()?;
    conf.username()?.validate()?;
    conf.age()?.validate()?;

    println!("{conf#?}");
}

I would be interested if something like this is already existing, e.g. based on inquire, promkit, or if there is any interest to add this?

There are some ideas already in inquire, but it feels a bit out of scope.

CC: mikaelmello/inquire#212
CC: mikaelmello/inquire#65

EDIT: It would basically be the clap way of doing interactive prompts. Annotate something and give it to the user to let it be filled out. I think it comes with its own advantages and disadvantages, and excels a lot in a workflow where you suddenly want the user to fill out some data you already have bundled in a struct.

I think it could be a game changing feature, though. Because it would make dealing with interactive prompts much easier for a lot of users. Also, it would be excellent to have for people that don't want the full-fledged control of a ratatui TUI, but still a bit more ergonomic when it comes to interactivity and developer experience creating such.