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|
mod echo;
use iced::widget::{
self, button, center, column, row, scrollable, text, text_input,
};
use iced::{color, Center, Element, Fill, Subscription, Task};
use std::sync::LazyLock;
pub fn main() -> iced::Result {
iced::application("WebSocket - Iced", WebSocket::update, WebSocket::view)
.subscription(WebSocket::subscription)
.run_with(WebSocket::new)
}
struct WebSocket {
messages: Vec<echo::Message>,
new_message: String,
state: State,
}
#[derive(Debug, Clone)]
enum Message {
NewMessageChanged(String),
Send(echo::Message),
Echo(echo::Event),
Server,
}
impl WebSocket {
fn new() -> (Self, Task<Message>) {
(
Self {
messages: Vec::new(),
new_message: String::new(),
state: State::Disconnected,
},
Task::batch([
Task::perform(echo::server::run(), |_| Message::Server),
widget::focus_next(),
]),
)
}
fn update(&mut self, message: Message) -> Task<Message> {
match message {
Message::NewMessageChanged(new_message) => {
self.new_message = new_message;
Task::none()
}
Message::Send(message) => match &mut self.state {
State::Connected(connection) => {
self.new_message.clear();
connection.send(message);
Task::none()
}
State::Disconnected => Task::none(),
},
Message::Echo(event) => match event {
echo::Event::Connected(connection) => {
self.state = State::Connected(connection);
self.messages.push(echo::Message::connected());
Task::none()
}
echo::Event::Disconnected => {
self.state = State::Disconnected;
self.messages.push(echo::Message::disconnected());
Task::none()
}
echo::Event::MessageReceived(message) => {
self.messages.push(message);
scrollable::snap_to(
MESSAGE_LOG.clone(),
scrollable::RelativeOffset::END,
)
}
},
Message::Server => Task::none(),
}
}
fn subscription(&self) -> Subscription<Message> {
Subscription::run(echo::connect).map(Message::Echo)
}
fn view(&self) -> Element<Message> {
let message_log: Element<_> = if self.messages.is_empty() {
center(
text("Your messages will appear here...")
.color(color!(0x888888)),
)
.into()
} else {
scrollable(
column(self.messages.iter().map(text).map(Element::from))
.spacing(10),
)
.id(MESSAGE_LOG.clone())
.height(Fill)
.into()
};
let new_message_input = {
let mut input = text_input("Type a message...", &self.new_message)
.on_input(Message::NewMessageChanged)
.padding(10);
let mut button = button(text("Send").height(40).align_y(Center))
.padding([0, 20]);
if matches!(self.state, State::Connected(_)) {
if let Some(message) = echo::Message::new(&self.new_message) {
input = input.on_submit(Message::Send(message.clone()));
button = button.on_press(Message::Send(message));
}
}
row![input, button].spacing(10).align_y(Center)
};
column![message_log, new_message_input]
.height(Fill)
.padding(20)
.spacing(10)
.into()
}
}
enum State {
Disconnected,
Connected(echo::Connection),
}
static MESSAGE_LOG: LazyLock<scrollable::Id> =
LazyLock::new(scrollable::Id::unique);
|
