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use iced::{
button, executor, Align, Application, Button, Column, Command, Container,
Element, Length, ProgressBar, Settings, Subscription, Text,
};
mod downloader;
pub fn main() {
Downloader::run(Settings::default())
}
#[derive(Debug, Default)]
struct Downloader {
// Whether to start the download or not.
enabled: bool,
// The current percentage of the download
current_progress: u64,
btn_state: button::State,
}
#[derive(Debug)]
pub enum Message {
DownloadUpdate(downloader::DownloadMessage),
Interaction(Interaction),
}
// For explanation of why we use an Interaction enum see here:
// https://github.com/hecrj/iced/pull/155#issuecomment-573523405
#[derive(Debug, Clone)]
pub enum Interaction {
// User pressed the button to start the download
StartDownload,
}
impl Application for Downloader {
type Executor = executor::Default;
type Message = Message;
fn new() -> (Downloader, Command<Message>) {
(Downloader::default(), Command::none())
}
fn title(&self) -> String {
String::from("Download Progress - Iced")
}
fn update(&mut self, message: Message) -> Command<Message> {
match message {
Message::Interaction(action) => match action {
Interaction::StartDownload => {
self.enabled = true;
}
},
Message::DownloadUpdate(update) => match update {
downloader::DownloadMessage::Downloading(percentage) => {
self.current_progress = percentage;
}
downloader::DownloadMessage::Done => {
self.current_progress = 100;
self.enabled = false;
}
_ => {}
},
};
Command::none()
}
fn subscription(&self) -> Subscription<Message> {
if self.enabled {
downloader::file("https://speed.hetzner.de/100MB.bin")
.map(Message::DownloadUpdate)
} else {
Subscription::none()
}
}
fn view(&mut self) -> Element<Message> {
// Construct widgets
let toggle_text = match self.enabled {
true => "Downloading...",
false => "Start the download!",
};
let toggle: Element<Interaction> =
Button::new(&mut self.btn_state, Text::new(toggle_text))
.on_press(Interaction::StartDownload)
.into();
let progress_bar =
ProgressBar::new(0.0..=100.0, self.current_progress as f32);
let progress_text = &match self.enabled {
true => format!("Downloading {}%", self.current_progress),
false => "Ready to rock!".into(),
};
// Construct layout
let content = Column::new()
.align_items(Align::Center)
.spacing(20)
.padding(20)
.push(Text::new(progress_text))
.push(progress_bar)
.push(toggle.map(Message::Interaction));
Container::new(content)
.width(Length::Fill)
.height(Length::Fill)
.center_x()
.center_y()
.into()
}
}
|
