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Implement reactive-rendering for menu

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This commit is contained in:
Héctor Ramón Jiménez 2024-10-23 20:04:13 +02:00
parent fdf046daff
commit 908af3fed7
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GPG key ID: 4C07CEC81AFA161F
1 changed files with 37 additions and 6 deletions
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43
widget/src/overlay/menu.rs
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@ -8,7 +8,8 @@ use crate::core::overlay;
use crate::core::renderer;
use crate::core::text::{self, Text};
use crate::core::touch;
use crate::core::widget::Tree;
use crate::core::widget::tree::{self, Tree};
use crate::core::window;
use crate::core::{
Background, Clipboard, Color, Length, Padding, Pixels, Point, Rectangle,
Size, Theme, Vector,
@ -334,6 +335,10 @@ where
class: &'a <Theme as Catalog>::Class<'b>,
}
struct ListState {
is_hovered: Option<bool>,
}
impl<'a, 'b, T, Message, Theme, Renderer> Widget<Message, Theme, Renderer>
for List<'a, 'b, T, Message, Theme, Renderer>
where
@ -341,6 +346,14 @@ where
Theme: Catalog,
Renderer: text::Renderer,
{
fn tag(&self) -> tree::Tag {
tree::Tag::of::<Option<bool>>()
}
fn state(&self) -> tree::State {
tree::State::new(ListState { is_hovered: None })
}
fn size(&self) -> Size<Length> {
Size {
width: Length::Fill,
@ -376,7 +389,7 @@ where
fn on_event(
&mut self,
_state: &mut Tree,
tree: &mut Tree,
event: Event,
layout: Layout<'_>,
cursor: mouse::Cursor,
@ -411,14 +424,20 @@ where
let new_hovered_option =
(cursor_position.y / option_height) as usize;
if let Some(on_option_hovered) = self.on_option_hovered {
if *self.hovered_option != Some(new_hovered_option) {
if let Some(option) =
self.options.get(new_hovered_option)
if *self.hovered_option != Some(new_hovered_option) {
if let Some(option) =
self.options.get(new_hovered_option)
{
if let Some(on_option_hovered) =
self.on_option_hovered
{
shell
.publish(on_option_hovered(option.clone()));
}
shell.request_redraw(
window::RedrawRequest::NextFrame,
);
}
}
@ -451,6 +470,18 @@ where
_ => {}
}
let state = tree.state.downcast_mut::<ListState>();
if state.is_hovered.is_some_and(|is_hovered| {
is_hovered != cursor.is_over(layout.bounds())
}) {
shell.request_redraw(window::RedrawRequest::NextFrame);
}
if let Event::Window(window::Event::RedrawRequested(_now)) = event {
state.is_hovered = Some(cursor.is_over(layout.bounds()));
}
event::Status::Ignored
}