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|
//! Show toggle controls using checkboxes.
use crate::{Bus, Css, Element, Length, Widget};
pub use iced_style::checkbox::{Style, StyleSheet};
use dodrio::bumpalo;
use std::rc::Rc;
/// A box that can be checked.
///
/// # Example
///
/// ```
/// # use iced_web::Checkbox;
///
/// pub enum Message {
/// CheckboxToggled(bool),
/// }
///
/// let is_checked = true;
///
/// Checkbox::new(is_checked, "Toggle me!", Message::CheckboxToggled);
/// ```
///
/// 
#[allow(missing_debug_implementations)]
pub struct Checkbox<Message> {
is_checked: bool,
on_toggle: Rc<dyn Fn(bool) -> Message>,
label: String,
width: Length,
style: Box<dyn StyleSheet>,
}
impl<Message> Checkbox<Message> {
/// Creates a new [`Checkbox`].
///
/// It expects:
/// * a boolean describing whether the [`Checkbox`] is checked or not
/// * the label of the [`Checkbox`]
/// * a function that will be called when the [`Checkbox`] is toggled. It
/// will receive the new state of the [`Checkbox`] and must produce a
/// `Message`.
///
/// [`Checkbox`]: struct.Checkbox.html
pub fn new<F>(is_checked: bool, label: &str, f: F) -> Self
where
F: 'static + Fn(bool) -> Message,
{
Checkbox {
is_checked,
on_toggle: Rc::new(f),
label: String::from(label),
width: Length::Shrink,
style: Default::default(),
}
}
/// Sets the width of the [`Checkbox`].
///
/// [`Checkbox`]: struct.Checkbox.html
pub fn width(mut self, width: Length) -> Self {
self.width = width;
self
}
/// Sets the style of the [`Checkbox`].
///
/// [`Checkbox`]: struct.Checkbox.html
pub fn style(mut self, style: impl Into<Box<dyn StyleSheet>>) -> Self {
self.style = style.into();
self
}
}
impl<Message> Widget<Message> for Checkbox<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::*;
let checkbox_label = bumpalo::format!(in bump, "{}", self.label);
let event_bus = bus.clone();
let on_toggle = self.on_toggle.clone();
let is_checked = self.is_checked;
// TODO: Styling
label(bump)
.children(vec![
input(bump)
.attr("type", "checkbox")
.bool_attr("checked", self.is_checked)
.on("click", move |_root, vdom, _event| {
let msg = on_toggle(!is_checked);
event_bus.publish(msg);
vdom.schedule_render();
})
.finish(),
text(checkbox_label.into_bump_str()),
])
.finish()
}
}
impl<'a, Message> From<Checkbox<Message>> for Element<'a, Message>
where
Message: 'static,
{
fn from(checkbox: Checkbox<Message>) -> Element<'a, Message> {
Element::new(checkbox)
}
}
|
