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use crate::icon::{Icon, IconKind};
#[cfg(feature = "theme")]
use crate::theme::use_theme;
use dioxus::prelude::*;
/// Componente Carosello/Slider interattivo per schede, contenuti e immagini con navigazione,
/// indicatori a punto (*dots*), loop ciclico e transizioni fluide.
#[component]
pub fn Carousel(
/// Numero totale di slide presenti nel carosello.
slide_count: usize,
/// Indice della slide attiva (opzionale se gestito esternamente).
active_index: Option<Signal<usize>>,
/// Se consentire il ciclo continuo infinito tra prima e ultima slide. Defaults to true.
#[props(default = true)]
r#loop: bool,
/// Se mostrare le frecce laterali di navigazione precedente/successiva. Defaults to true.
#[props(default = true)]
with_controls: bool,
/// Se mostrare gli indicatori a punto (*dots*) in basso. Defaults to true.
#[props(default = true)]
with_indicators: bool,
/// Se applicare una spaziatura interna protetta tra il contenuto e i bordi/controlli del carosello. Defaults to false.
#[props(default = false)]
padded: bool,
/// Elementi figli (istanze di [`CarouselSlide`]).
children: Element,
/// Classi CSS aggiuntive.
#[props(default)]
class: String,
) -> Element {
let internal_index = use_signal(|| 0usize);
let mut current_idx = active_index.unwrap_or(internal_index);
let count = slide_count.max(1);
let idx = *current_idx.read();
let can_go_prev = r#loop || idx > 0;
let can_go_next = r#loop || idx < count - 1;
let prev_slide = move || {
let mut idx_sig = current_idx;
if count > 0 {
let next_val = if idx == 0 {
if r#loop { count - 1 } else { 0 }
} else {
idx - 1
};
idx_sig.set(next_val);
}
};
let next_slide = move || {
let mut idx_sig = current_idx;
if count > 0 {
let next_val = if idx >= count - 1 {
if r#loop { 0 } else { count - 1 }
} else {
idx + 1
};
idx_sig.set(next_val);
}
};
let track_transform = format!("translateX(-{}%)", idx * 100);
let pad_class = if padded { "sd-carousel--padded" } else { "" };
let carousel_id = crate::a11y::use_unique_id("carousel", None);
use_effect(use_reactive(&carousel_id, move |cid| {
let js = format!(
r#"
(function() {{
let attempts = 0;
function tryInit() {{
const carousel = document.getElementById("{cid}");
if (!carousel) {{
if (attempts++ < 30) setTimeout(tryInit, 30);
return;
}}
let hideTimeout = null;
function show() {{
carousel.classList.add("sd-carousel--controls-visible");
if (hideTimeout) clearTimeout(hideTimeout);
hideTimeout = setTimeout(() => {{
const isHovered = carousel.matches(":hover") &&
(carousel.querySelector(".sd-carousel-control:hover") ||
carousel.querySelector(".sd-carousel-indicators:hover"));
if (!isHovered) {{
carousel.classList.remove("sd-carousel--controls-visible");
}}
}}, 2400);
}}
function hide() {{
if (hideTimeout) clearTimeout(hideTimeout);
carousel.classList.remove("sd-carousel--controls-visible");
}}
carousel.addEventListener("mouseenter", show);
carousel.addEventListener("mousemove", show);
carousel.addEventListener("mouseleave", hide);
const controls = carousel.querySelectorAll(".sd-carousel-control, .sd-carousel-indicators");
controls.forEach(c => {{
c.addEventListener("mouseenter", () => {{
if (hideTimeout) clearTimeout(hideTimeout);
carousel.classList.add("sd-carousel--controls-visible");
}});
}});
}}
tryInit();
}})();
"#
);
let _ = document::eval(&js);
}));
#[cfg(feature = "theme")]
let _theme = use_theme();
let on_prev_click = move |_| prev_slide();
let on_next_click = move |_| next_slide();
rsx! {
div {
id: "{carousel_id}",
tabindex: "0",
role: "region",
"aria-roledescription": "carousel",
"aria-label": "Carosello di contenuti",
onkeydown: move |e: KeyboardEvent| {
match e.key() {
Key::ArrowLeft => {
e.prevent_default();
prev_slide();
}
Key::ArrowRight => {
e.prevent_default();
next_slide();
}
_ => {}
}
},
class: "sd-carousel {pad_class} {class}",
// Viewport con overflow nascosto
div { class: "sd-carousel-viewport",
// Track delle slide con trasformazione animata
div {
class: "sd-carousel-track",
style: "transform: {track_transform};",
{children}
}
}
// Frecce di controllo
if with_controls && count > 1 {
button {
r#type: "button",
disabled: !can_go_prev,
class: format!("sd-carousel-control sd-carousel-control--prev {}", if !can_go_prev { "sd-carousel-control--disabled" } else { "" }),
onclick: on_prev_click,
"aria-label": "Slide precedente",
Icon { kind: IconKind::ChevronLeft, size: 18 }
}
button {
r#type: "button",
disabled: !can_go_next,
class: format!("sd-carousel-control sd-carousel-control--next {}", if !can_go_next { "sd-carousel-control--disabled" } else { "" }),
onclick: on_next_click,
"aria-label": "Slide successiva",
Icon { kind: IconKind::ChevronRight, size: 18 }
}
}
// Indicatori a punto (Dots)
if with_indicators && count > 1 {
div { class: "sd-carousel-indicators", role: "tablist",
for i in 0..count {
{
let is_active = i == idx;
let dot_class = if is_active { "sd-carousel-dot sd-carousel-dot--active" } else { "sd-carousel-dot" };
rsx! {
button {
key: "{i}",
r#type: "button",
role: "tab",
"aria-selected": if is_active { "true" } else { "false" },
class: "{dot_class}",
"aria-label": "Vai alla slide {i + 1}",
onclick: move |_| current_idx.set(i),
}
}
}
}
}
}
}
}
}
/// Singola slide all'interno del [`Carousel`].
#[component]
pub fn CarouselSlide(
/// Contenuto interno della slide.
children: Element,
/// Classi CSS aggiuntive.
#[props(default)]
class: String,
) -> Element {
rsx! {
div { class: "sd-carousel-slide {class}",
{children}
}
}
}