Struct DropdownOption 

pub struct DropdownOption<Msg = Callback> { /* private fields */ }

One choice in a DropdownButton’s list.

options takes plain strings and is still the right call for the common case; this is what a choice is when it is not one. A colour swatch beside a name, a flag, a two-line entry with a subtitle, a heading — and a choice that is there but cannot be picked, which no string can say.

A choice carries no message: options and options_widgets both map the chosen index to one, so that a list built from an application’s own vector says what it means once.

use frus_widgets::{Container, DropdownButton, DropdownOption};
use frus_core::Color;

let swatch = |c: Color| Container::<Msg>::new().width(14.0).height(14.0).color(c);
let menu = DropdownButton::new("Amber", Msg::Toggle).options_widgets(
    true,
    vec![
        DropdownOption::widget(swatch(Color::rgb8(255, 193, 7))),
        DropdownOption::widget(swatch(Color::rgb8(3, 169, 244))),
        DropdownOption::new("Out of stock").enabled(false),
    ],
    Msg::Pick,
);

Implementations

impl<Msg> DropdownOption<Msg>

pub fn new(label: impl Into<String>) -> Self

A choice of words — what options builds.

pub fn widget(child: impl Widget<Msg> + 'static) -> Self

A choice the caller draws.

It is laid out in the room the words would have had, with the tick’s column kept clear, and it grows: a choice of words is a row tall, a choice of anything else is at least that and as much more as it needs.

pub fn enabled(self, enabled: bool) -> Self

Whether this choice can be picked, over the list’s own availability.

A choice that cannot be picked is still drawn, still announced, and still ticked if it is the one selected — which happens, and is the reason it is drawn rather than left out: a list that hides what it cannot offer cannot show what was already chosen.