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

use std::cell::Cell;

use super::behaviors::MouseBehavior;
use crate::prelude::*;

/// State to handle the position of switch toggle.
#[derive(Default)]
pub struct SwitchState {
    selected: Cell<bool>,
}

impl SwitchState {
    fn toggle_selection(&self) {
        self.selected.set(!self.selected.get());
    }
}

impl State for SwitchState {
    fn update(&self, ctx: &mut Context<'_>) {
        if *ctx.widget().get::<bool>("selected") == self.selected.get() {
            return;
        }

        ctx.widget().set("selected", self.selected.get());

        let element = ctx.widget().clone::<Selector>("selector").element.unwrap();

        if let Some(parent) = ctx.parent_entity_by_element(&*element) {
            ctx.get_widget(parent).update_theme_by_state(false);
        }

        {
            let mut switch_toggle = ctx.child("switch_toggle");

            if self.selected.get() {
                switch_toggle.set("horizontal_alignment", Alignment::from("end"));
                add_selector_to_widget("selected", &mut switch_toggle);
            } else {
                switch_toggle.set("horizontal_alignment", Alignment::from("start"));
                remove_selector_from_widget("selected", &mut switch_toggle);
            }

            switch_toggle.update_theme_by_state(true);
        }

        let entity = ctx.entity_of_child("switch_toggle").unwrap();

        ctx.get_widget(entity).update_theme_by_state(false);
    }
}

widget!(
    /// The `Switch` widget can be switch between `on` and `off`.
    ///
    /// **CSS element:** `switch`
    Switch<SwitchState>: MouseHandler {
        /// Sets or shares the background property.
        background: Brush,

        /// Sets or shares the border radius property.
        border_radius: f64,

        /// Sets or shares the border thickness property.
        border_width: Thickness,

        /// Sets or shares the border brush property.
        border_brush: Brush,

        /// Sets or shares the padding property.
        padding: Thickness,

        /// Sets or shares the css selector property.
        selector: Selector,

        /// Sets or shares the pressed property.
        pressed: bool,

        /// Sets or shares the selected property.
        selected: bool
    }
);

impl Template for Switch {
    fn template(self, id: Entity, ctx: &mut BuildContext) -> Self {
        let state = self.clone_state();
        self.name("Switch")
            .selector("switch")
            .pressed(false)
            .selected(false)
            .width(56.0)
            .height(32.0)
            .border_brush(colors::BOMBAY_COLOR)
            .background(colors::SLATE_GRAY_COLOR)
            .border_radius(2.0)
            .border_width(1.0)
            .padding(4.0)
            .child(
                MouseBehavior::create()
                    .pressed(id)
                    .enabled(id)
                    .selector(id)
                    .on_click(move |_| {
                        state.toggle_selection();
                        false
                    })
                    .child(
                        Container::create()
                            .background(id)
                            .border_radius(id)
                            .border_width(id)
                            .border_brush(id)
                            .padding(id)
                            .child(
                                Grid::create()
                                    .child(Container::create().size(24.0, 24.0).build(ctx))
                                    .border_radius(1.0)
                                    .selector(Selector::from("switch-toggle").id("switch_toggle"))
                                    .vertical_alignment("center")
                                    .horizontal_alignment("start")
                                    .build(ctx),
                            )
                            .build(ctx),
                    )
                    .build(ctx),
            )
    }
}