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use iced::alignment;
use iced::event::{self, Event};
use iced::widget::{button, center, checkbox, text, Column};
use iced::window;
use iced::{Alignment, Command, Element, Length, Subscription};
pub fn main() -> iced::Result {
iced::program("Events - Iced", Events::update, Events::view)
.subscription(Events::subscription)
.exit_on_close_request(false)
.run()
}
#[derive(Debug, Default)]
struct Events {
last: Vec<Event>,
enabled: bool,
}
#[derive(Debug, Clone)]
enum Message {
EventOccurred(Event),
Toggled(bool),
Exit,
}
impl Events {
fn update(&mut self, message: Message) -> Command<Message> {
match message {
Message::EventOccurred(event) if self.enabled => {
self.last.push(event);
if self.last.len() > 5 {
let _ = self.last.remove(0);
}
Command::none()
}
Message::EventOccurred(event) => {
if let Event::Window(window::Event::CloseRequested) = event {
window::close(window::Id::MAIN)
} else {
Command::none()
}
}
Message::Toggled(enabled) => {
self.enabled = enabled;
Command::none()
}
Message::Exit => window::close(window::Id::MAIN),
}
}
fn subscription(&self) -> Subscription<Message> {
event::listen().map(Message::EventOccurred)
}
fn view(&self) -> Element<Message> {
let events = Column::with_children(
self.last
.iter()
.map(|event| text!("{event:?}").size(40))
.map(Element::from),
);
let toggle = checkbox("Listen to runtime events", self.enabled)
.on_toggle(Message::Toggled);
let exit = button(
text("Exit")
.width(Length::Fill)
.horizontal_alignment(alignment::Horizontal::Center),
)
.width(100)
.padding(10)
.on_press(Message::Exit);
let content = Column::new()
.align_items(Alignment::Center)
.spacing(20)
.push(events)
.push(toggle)
.push(exit);
center(content).into()
}
}
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