embedded_ui/
el.rs

1use core::{borrow::Borrow, sync::atomic::AtomicU64};
2
3use alloc::boxed::Box;
4
5use crate::{
6    event::Event,
7    layout::{Layout, Viewport},
8    render::Renderer,
9    size::{Length, Size},
10    state::{self, StateNode},
11    style::Styler,
12    ui::UiCtx,
13    widget::Widget,
14};
15
16static NEXT_ID: AtomicU64 = AtomicU64::new(0);
17
18#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
19pub enum ElId {
20    Unique(u64),
21    Custom(&'static str), // TODO: Custom
22}
23
24impl ElId {
25    pub fn new(name: &'static str) -> Self {
26        Self::Custom(name)
27    }
28
29    pub fn unique() -> Self {
30        Self::Unique(NEXT_ID.fetch_add(1, core::sync::atomic::Ordering::Relaxed))
31    }
32}
33
34impl From<&'static str> for ElId {
35    fn from(value: &'static str) -> Self {
36        Self::new(value)
37    }
38}
39
40pub struct El<'a, Message, R: Renderer, E: Event, S> {
41    widget: Box<dyn Widget<Message, R, E, S> + 'a>,
42}
43
44impl<'a, Message, R: Renderer, E: Event, S> Widget<Message, R, E, S> for El<'a, Message, R, E, S> {
45    fn id(&self) -> Option<ElId> {
46        self.widget.id()
47    }
48
49    fn tree_ids(&self) -> alloc::vec::Vec<ElId> {
50        self.widget.tree_ids()
51    }
52
53    fn size(&self) -> Size<Length> {
54        self.widget.size()
55    }
56
57    fn layout(
58        &self,
59        ctx: &mut UiCtx<Message>,
60        state_tree: &mut StateNode,
61        styler: &S,
62        limits: &crate::layout::Limits,
63        viewport: &Viewport,
64    ) -> crate::layout::LayoutNode {
65        self.widget.layout(ctx, state_tree, styler, limits, viewport)
66    }
67
68    fn draw(
69        &self,
70        ctx: &mut UiCtx<Message>,
71        state_tree: &mut StateNode,
72        renderer: &mut R,
73        styler: &S,
74        layout: Layout,
75    ) {
76        self.widget.draw(ctx, state_tree, renderer, styler, layout)
77    }
78
79    fn on_event(
80        &mut self,
81        ctx: &mut UiCtx<Message>,
82        event: E,
83        state: &mut StateNode,
84    ) -> crate::event::EventResponse<E> {
85        self.widget.on_event(ctx, event, state)
86    }
87
88    fn state_tag(&self) -> crate::state::StateTag {
89        self.widget.state_tag()
90    }
91
92    fn state(&self) -> state::State {
93        self.widget.state()
94    }
95
96    fn state_children(&self) -> alloc::vec::Vec<StateNode> {
97        self.widget.state_children()
98    }
99}
100
101impl<'a, Message, R: Renderer, E: Event, S> El<'a, Message, R, E, S> {
102    pub fn new(widget: impl Widget<Message, R, E, S> + 'a) -> Self {
103        Self { widget: Box::new(widget) }
104    }
105
106    pub fn widget(&self) -> &dyn Widget<Message, R, E, S> {
107        self.widget.as_ref()
108    }
109}
110
111impl<'a, Message, R: Renderer, E: Event, S> Borrow<dyn Widget<Message, R, E, S> + 'a>
112    for El<'a, Message, R, E, S>
113{
114    fn borrow(&self) -> &(dyn Widget<Message, R, E, S> + 'a) {
115        self.widget.borrow()
116    }
117}
118
119impl<'a, Message, R: Renderer, E: Event, S> Borrow<dyn Widget<Message, R, E, S> + 'a>
120    for &El<'a, Message, R, E, S>
121{
122    fn borrow(&self) -> &(dyn Widget<Message, R, E, S> + 'a) {
123        self.widget.borrow()
124    }
125}
126
127// impl<'a, Message, R: Renderer, T> From<T> for El<'a, Message, R>
128// where
129//     T: Widget<Message, R>,
130// {
131
132// }
embedded_ui/el.rs

embedded_ui/
el.rs
