1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

//! Show toggle controls using checkboxes.
use crate::{css, 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);
/// ```
///
/// ![Checkbox drawn by Coffee's renderer](https://github.com/hecrj/coffee/blob/bda9818f823dfcb8a7ad0ff4940b4d4b387b5208/images/ui/checkbox.png?raw=true)
#[allow(missing_debug_implementations)]
pub struct Checkbox<Message> {
    is_checked: bool,
    on_toggle: Rc<dyn Fn(bool) -> Message>,
    label: String,
    id: Option<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: impl Into<String>, f: F) -> Self
    where
        F: 'static + Fn(bool) -> Message,
    {
        Checkbox {
            is_checked,
            on_toggle: Rc::new(f),
            label: label.into(),
            id: None,
            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
    }

    /// Sets the id of the [`Checkbox`].
    ///
    /// [`Checkbox`]: struct.Checkbox.html
    pub fn id(mut self, id: impl Into<String>) -> Self {
        self.id = Some(id.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::*;
        use dodrio::bumpalo::collections::String;

        let checkbox_label =
            String::from_str_in(&self.label, bump).into_bump_str();

        let event_bus = bus.clone();
        let on_toggle = self.on_toggle.clone();
        let is_checked = self.is_checked;

        let row_class = style_sheet.insert(bump, css::Rule::Row);

        let spacing_class = style_sheet.insert(bump, css::Rule::Spacing(5));

        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))
        };

        label
            .attr(
                "class",
                bumpalo::format!(in bump, "{} {}", row_class, spacing_class)
                    .into_bump_str(),
            )
            .attr(
                "style",
                bumpalo::format!(in bump, "width: {}; align-items: center", css::length(self.width))
                    .into_bump_str(),
            )
            .children(vec![
                // TODO: Checkbox styling
                 input
                    .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),
            ])
            .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)
    }
}