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|
use iced::{
Align, Application, Checkbox, Column, Command, Container, Element, Length,
Settings, Subscription, Text,
};
pub fn main() {
env_logger::init();
Events::run(Settings::default())
}
#[derive(Debug, Default)]
struct Events {
last: Vec<iced_native::Event>,
enabled: bool,
}
#[derive(Debug, Clone)]
enum Message {
EventOccurred(iced_native::Event),
Toggled(bool),
}
impl Application for Events {
type Message = Message;
fn new() -> (Events, Command<Message>) {
(Events::default(), Command::none())
}
fn title(&self) -> String {
String::from("Events - Iced")
}
fn update(&mut self, message: Message) -> Command<Message> {
match message {
Message::EventOccurred(event) => {
self.last.push(event);
if self.last.len() > 5 {
let _ = self.last.remove(0);
}
}
Message::Toggled(enabled) => {
self.enabled = enabled;
}
};
Command::none()
}
fn subscriptions(&self) -> Subscription<Message> {
if self.enabled {
events::all().map(Message::EventOccurred)
} else {
Subscription::none()
}
}
fn view(&mut self) -> Element<Message> {
let events = self.last.iter().fold(
Column::new().width(Length::Shrink).spacing(10),
|column, event| {
column.push(
Text::new(format!("{:?}", event))
.size(40)
.width(Length::Shrink),
)
},
);
let toggle = Checkbox::new(self.enabled, "Enabled", Message::Toggled)
.width(Length::Shrink);
let content = Column::new()
.width(Length::Shrink)
.align_items(Align::Center)
.spacing(20)
.push(events)
.push(toggle);
Container::new(content)
.width(Length::Fill)
.height(Length::Fill)
.center_x()
.center_y()
.into()
}
}
mod events {
pub fn all() -> iced::Subscription<iced_native::Event> {
iced::Subscription::from_recipe(All)
}
struct All;
impl<H>
iced_native::subscription::Recipe<H, iced_native::subscription::Input>
for All
where
H: std::hash::Hasher,
{
type Output = iced_native::Event;
fn hash(&self, state: &mut H) {
use std::hash::Hash;
std::any::TypeId::of::<All>().hash(state);
}
fn stream(
&self,
input: iced_native::subscription::Input,
) -> futures::stream::BoxStream<'static, Self::Output> {
use futures::StreamExt;
input.boxed()
}
}
}
|
