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|
//! Show toggle controls using togglers.
use crate::{css, Bus, Css, Element, Length, Widget};
pub use iced_style::toggler::{Style, StyleSheet};
use dodrio::bumpalo;
use std::rc::Rc;
/// A toggler that can be toggled.
///
/// # Example
///
/// ```
/// # use iced_web::Toggler;
///
/// pub enum Message {
/// TogglerToggled(bool),
/// }
///
/// let is_active = true;
///
/// Toggler::new(is_active, String::from("Toggle me!"), Message::TogglerToggled);
/// ```
///
#[allow(missing_debug_implementations)]
pub struct Toggler<Message> {
is_active: bool,
on_toggle: Rc<dyn Fn(bool) -> Message>,
label: Option<String>,
id: Option<String>,
width: Length,
style: Box<dyn StyleSheet>,
}
impl<Message> Toggler<Message> {
/// Creates a new [`Toggler`].
///
/// It expects:
/// * a boolean describing whether the [`Toggler`] is active or not
/// * An optional label for the [`Toggler`]
/// * a function that will be called when the [`Toggler`] is toggled. It
/// will receive the new state of the [`Toggler`] and must produce a
/// `Message`.
///
/// [`Toggler`]: struct.Toggler.html
pub fn new<F>(
is_active: bool,
label: impl Into<Option<String>>,
f: F,
) -> Self
where
F: 'static + Fn(bool) -> Message,
{
Toggler {
is_active,
on_toggle: Rc::new(f),
label: label.into(),
id: None,
width: Length::Shrink,
style: Default::default(),
}
}
/// Sets the width of the [`Toggler`].
///
/// [`Toggler`]: struct.Toggler.html
pub fn width(mut self, width: Length) -> Self {
self.width = width;
self
}
/// Sets the style of the [`Toggler`].
///
/// [`Toggler`]: struct.Toggler.html
pub fn style(mut self, style: impl Into<Box<dyn StyleSheet>>) -> Self {
self.style = style.into();
self
}
/// Sets the id of the [`Toggler`].
///
/// [`Toggler`]: struct.Toggler.html
pub fn id(mut self, id: impl Into<String>) -> Self {
self.id = Some(id.into());
self
}
}
impl<Message> Widget<Message> for Toggler<Message>
where
Message: 'static,
{
fn node<'b>(
&self,
bump: &'b bumpalo::Bump,
bus: &Bus<Message>,
style_sheet: &mut Css<'b>,
) -> dodrio::Node<'b> {
use dodrio::builder::*;
use dodrio::bumpalo::collections::String;
let toggler_label = &self
.label
.as_ref()
.map(|label| String::from_str_in(&label, bump).into_bump_str());
let event_bus = bus.clone();
let on_toggle = self.on_toggle.clone();
let is_active = self.is_active;
let row_class = style_sheet.insert(bump, css::Rule::Row);
let toggler_class = style_sheet.insert(bump, css::Rule::Toggler(16));
let (label, input) = if let Some(id) = &self.id {
let id = String::from_str_in(id, bump).into_bump_str();
(label(bump).attr("for", id), input(bump).attr("id", id))
} else {
(label(bump), input(bump))
};
let checkbox = input
.attr("type", "checkbox")
.bool_attr("checked", self.is_active)
.on("click", move |_root, vdom, _event| {
let msg = on_toggle(!is_active);
event_bus.publish(msg);
vdom.schedule_render();
})
.finish();
let toggler = span(bump).children(vec![span(bump).finish()]).finish();
label
.attr(
"class",
bumpalo::format!(in bump, "{} {}", row_class, toggler_class)
.into_bump_str(),
)
.attr(
"style",
bumpalo::format!(in bump, "width: {}; align-items: center", css::length(self.width))
.into_bump_str()
)
.children(
if let Some(label) = toggler_label {
vec![
text(label),
checkbox,
toggler,
]
} else {
vec![
checkbox,
toggler,
]
}
)
.finish()
}
}
impl<'a, Message> From<Toggler<Message>> for Element<'a, Message>
where
Message: 'static,
{
fn from(toggler: Toggler<Message>) -> Element<'a, Message> {
Element::new(toggler)
}
}
|
