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|
mod download;
use download::download;
use iced::task;
use iced::widget::{Column, button, center, column, progress_bar, text};
use iced::{Center, Element, Function, Right, Task};
pub fn main() -> iced::Result {
iced::application(
"Download Progress - Iced",
Example::update,
Example::view,
)
.run()
}
#[derive(Debug)]
struct Example {
downloads: Vec<Download>,
last_id: usize,
}
#[derive(Debug, Clone)]
pub enum Message {
Add,
Download(usize),
DownloadUpdated(usize, Update),
}
impl Example {
fn new() -> Self {
Self {
downloads: vec![Download::new(0)],
last_id: 0,
}
}
fn update(&mut self, message: Message) -> Task<Message> {
match message {
Message::Add => {
self.last_id += 1;
self.downloads.push(Download::new(self.last_id));
Task::none()
}
Message::Download(index) => {
let Some(download) = self.downloads.get_mut(index) else {
return Task::none();
};
let task = download.start();
task.map(Message::DownloadUpdated.with(index))
}
Message::DownloadUpdated(id, update) => {
if let Some(download) =
self.downloads.iter_mut().find(|download| download.id == id)
{
download.update(update);
}
Task::none()
}
}
}
fn view(&self) -> Element<Message> {
let downloads =
Column::with_children(self.downloads.iter().map(Download::view))
.push(
button("Add another download")
.on_press(Message::Add)
.padding(10),
)
.spacing(20)
.align_x(Right);
center(downloads).padding(20).into()
}
}
impl Default for Example {
fn default() -> Self {
Self::new()
}
}
#[derive(Debug)]
struct Download {
id: usize,
state: State,
}
#[derive(Debug, Clone)]
pub enum Update {
Downloading(download::Progress),
Finished(Result<(), download::Error>),
}
#[derive(Debug)]
enum State {
Idle,
Downloading { progress: f32, _task: task::Handle },
Finished,
Errored,
}
impl Download {
pub fn new(id: usize) -> Self {
Download {
id,
state: State::Idle,
}
}
pub fn start(&mut self) -> Task<Update> {
match self.state {
State::Idle { .. }
| State::Finished { .. }
| State::Errored { .. } => {
let (task, handle) = Task::sip(
download(
"https://huggingface.co/\
mattshumer/Reflection-Llama-3.1-70B/\
resolve/main/model-00001-of-00162.safetensors",
),
Update::Downloading,
Update::Finished,
)
.abortable();
self.state = State::Downloading {
progress: 0.0,
_task: handle.abort_on_drop(),
};
task
}
State::Downloading { .. } => Task::none(),
}
}
pub fn update(&mut self, update: Update) {
if let State::Downloading { progress, .. } = &mut self.state {
match update {
Update::Downloading(new_progress) => {
*progress = new_progress.percent;
}
Update::Finished(result) => {
self.state = if result.is_ok() {
State::Finished
} else {
State::Errored
};
}
}
}
}
pub fn view(&self) -> Element<Message> {
let current_progress = match &self.state {
State::Idle { .. } => 0.0,
State::Downloading { progress, .. } => *progress,
State::Finished { .. } => 100.0,
State::Errored { .. } => 0.0,
};
let progress_bar = progress_bar(0.0..=100.0, current_progress);
let control: Element<_> = match &self.state {
State::Idle => button("Start the download!")
.on_press(Message::Download(self.id))
.into(),
State::Finished => {
column!["Download finished!", button("Start again")]
.spacing(10)
.align_x(Center)
.into()
}
State::Downloading { .. } => {
text!("Downloading... {current_progress:.2}%").into()
}
State::Errored => column![
"Something went wrong :(",
button("Try again").on_press(Message::Download(self.id)),
]
.spacing(10)
.align_x(Center)
.into(),
};
Column::new()
.spacing(10)
.padding(10)
.align_x(Center)
.push(progress_bar)
.push(control)
.into()
}
}
|
