embedded_ui/
value.rs

1use core::cell::{Ref, RefCell, RefMut};
2
3use alloc::{rc::Rc, vec::Vec};
4
5use crate::{el::El, event::Event, layout::Viewport, render::Renderer, widget::Widget};
6
7#[derive(Clone, PartialEq, Eq, PartialOrd, Ord)]
8pub enum Value<T> {
9    Static(RefCell<T>),
10    Dynamic(Rc<RefCell<T>>),
11}
12
13impl<T> Value<T> {
14    pub fn new(value: T) -> Self {
15        Self::Static(RefCell::new(value))
16    }
17
18    pub fn dynamic(value: T) -> Self {
19        Self::Dynamic(Rc::new(RefCell::new(value)))
20    }
21
22    #[inline]
23    pub fn get(&self) -> Ref<'_, T> {
24        match self {
25            Value::Static(value) => value.borrow(),
26            Value::Dynamic(value) => value.borrow(),
27        }
28    }
29
30    #[inline]
31    pub fn get_mut(&self) -> RefMut<'_, T> {
32        match self {
33            Value::Static(value) => value.borrow_mut(),
34            Value::Dynamic(value) => value.borrow_mut(),
35        }
36    }
37}
38
39impl<T> From<T> for Value<T> {
40    fn from(value: T) -> Self {
41        Self::new(value)
42    }
43}
44
45impl<T, Message, R, E, S> Widget<Message, R, E, S> for Value<T>
46where
47    R: Renderer,
48    E: Event,
49    T: Widget<Message, R, E, S>,
50{
51    fn id(&self) -> Option<crate::el::ElId> {
52        self.get().id()
53    }
54
55    fn tree_ids(&self) -> Vec<crate::el::ElId> {
56        self.get().tree_ids()
57    }
58
59    fn size(&self) -> crate::size::Size<crate::size::Length> {
60        self.get().size()
61    }
62
63    fn layout(
64        &self,
65        ctx: &mut crate::ui::UiCtx<Message>,
66        state: &mut crate::state::StateNode,
67        styler: &S,
68        limits: &crate::layout::Limits,
69        viewport: &Viewport,
70    ) -> crate::layout::LayoutNode {
71        self.get().layout(ctx, state, styler, limits, viewport)
72    }
73
74    fn draw(
75        &self,
76        ctx: &mut crate::ui::UiCtx<Message>,
77        state: &mut crate::state::StateNode,
78        renderer: &mut R,
79        styler: &S,
80        layout: crate::layout::Layout,
81    ) {
82        self.get().draw(ctx, state, renderer, styler, layout)
83    }
84}
85
86impl<'a, T, Message, R, E, S> From<Value<T>> for El<'a, Message, R, E, S>
87where
88    T: Widget<Message, R, E, S> + Clone + 'a,
89    Message: Clone + 'a,
90    R: Renderer + 'a,
91    E: Event + 'a,
92{
93    fn from(value: Value<T>) -> Self {
94        El::new(value)
95    }
96}
embedded_ui/value.rs

embedded_ui/
value.rs
