diff options
Diffstat (limited to 'examples/download_progress/src/main.rs')
| -rw-r--r-- | examples/download_progress/src/main.rs | 195 |
1 files changed, 133 insertions, 62 deletions
diff --git a/examples/download_progress/src/main.rs b/examples/download_progress/src/main.rs index 77b01354..cd024926 100644 --- a/examples/download_progress/src/main.rs +++ b/examples/download_progress/src/main.rs @@ -10,17 +10,17 @@ pub fn main() -> iced::Result { } #[derive(Debug)] -enum Example { - Idle { button: button::State }, - Downloading { progress: f32 }, - Finished { button: button::State }, - Errored { button: button::State }, +struct Example { + downloads: Vec<Download>, + last_id: usize, + add: button::State, } #[derive(Debug, Clone)] pub enum Message { - Download, - DownloadProgressed(download::Progress), + Add, + Download(usize), + DownloadProgressed((usize, download::Progress)), } impl Application for Example { @@ -30,8 +30,10 @@ impl Application for Example { fn new(_flags: ()) -> (Example, Command<Message>) { ( - Example::Idle { - button: button::State::new(), + Example { + downloads: vec![Download::new(0)], + last_id: 0, + add: button::State::new(), }, Command::none(), ) @@ -43,102 +45,171 @@ impl Application for Example { fn update(&mut self, message: Message) -> Command<Message> { match message { - Message::Download => match self { - Example::Idle { .. } - | Example::Finished { .. } - | Example::Errored { .. } => { - *self = Example::Downloading { progress: 0.0 }; + Message::Add => { + self.last_id = self.last_id + 1; + + self.downloads.push(Download::new(self.last_id)); + } + Message::Download(index) => { + if let Some(download) = self.downloads.get_mut(index) { + download.start(); } - _ => {} - }, - Message::DownloadProgressed(message) => match self { - Example::Downloading { progress } => match message { - download::Progress::Started => { - *progress = 0.0; - } - download::Progress::Advanced(percentage) => { - *progress = percentage; - } - download::Progress::Finished => { - *self = Example::Finished { - button: button::State::new(), - } - } - download::Progress::Errored => { - *self = Example::Errored { - button: button::State::new(), - }; - } - }, - _ => {} - }, + } + Message::DownloadProgressed((id, progress)) => { + if let Some(download) = + self.downloads.iter_mut().find(|download| download.id == id) + { + download.progress(progress); + } + } }; Command::none() } fn subscription(&self) -> Subscription<Message> { - match self { - Example::Downloading { .. } => { - download::file("https://speed.hetzner.de/100MB.bin") + Subscription::batch(self.downloads.iter().map(Download::subscription)) + } + + fn view(&mut self) -> Element<Message> { + let downloads = self + .downloads + .iter_mut() + .fold(Column::new().spacing(20), |column, download| { + column.push(download.view()) + }) + .push( + Button::new(&mut self.add, Text::new("Add another download")) + .on_press(Message::Add) + .padding(10), + ) + .align_items(Align::End); + + Container::new(downloads) + .width(Length::Fill) + .height(Length::Fill) + .center_x() + .center_y() + .padding(20) + .into() + } +} + +#[derive(Debug)] +struct Download { + id: usize, + state: State, +} + +#[derive(Debug)] +enum State { + Idle { button: button::State }, + Downloading { progress: f32 }, + Finished { button: button::State }, + Errored { button: button::State }, +} + +impl Download { + pub fn new(id: usize) -> Self { + Download { + id, + state: State::Idle { + button: button::State::new(), + }, + } + } + + pub fn start(&mut self) { + match self.state { + State::Idle { .. } + | State::Finished { .. } + | State::Errored { .. } => { + self.state = State::Downloading { progress: 0.0 }; + } + _ => {} + } + } + + pub fn progress(&mut self, new_progress: download::Progress) { + match &mut self.state { + State::Downloading { progress } => match new_progress { + download::Progress::Started => { + *progress = 0.0; + } + download::Progress::Advanced(percentage) => { + *progress = percentage; + } + download::Progress::Finished => { + self.state = State::Finished { + button: button::State::new(), + } + } + download::Progress::Errored => { + self.state = State::Errored { + button: button::State::new(), + }; + } + }, + _ => {} + } + } + + pub fn subscription(&self) -> Subscription<Message> { + match self.state { + State::Downloading { .. } => { + download::file(self.id, "https://speed.hetzner.de/100MB.bin?") .map(Message::DownloadProgressed) } _ => Subscription::none(), } } - fn view(&mut self) -> Element<Message> { - let current_progress = match self { - Example::Idle { .. } => 0.0, - Example::Downloading { progress } => *progress, - Example::Finished { .. } => 100.0, - Example::Errored { .. } => 0.0, + pub fn view(&mut 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 = ProgressBar::new(0.0..=100.0, current_progress); - let control: Element<_> = match self { - Example::Idle { button } => { + let control: Element<_> = match &mut self.state { + State::Idle { button } => { Button::new(button, Text::new("Start the download!")) - .on_press(Message::Download) + .on_press(Message::Download(self.id)) .into() } - Example::Finished { button } => Column::new() + State::Finished { button } => Column::new() .spacing(10) .align_items(Align::Center) .push(Text::new("Download finished!")) .push( Button::new(button, Text::new("Start again")) - .on_press(Message::Download), + .on_press(Message::Download(self.id)), ) .into(), - Example::Downloading { .. } => { + State::Downloading { .. } => { Text::new(format!("Downloading... {:.2}%", current_progress)) .into() } - Example::Errored { button } => Column::new() + State::Errored { button } => Column::new() .spacing(10) .align_items(Align::Center) .push(Text::new("Something went wrong :(")) .push( Button::new(button, Text::new("Try again")) - .on_press(Message::Download), + .on_press(Message::Download(self.id)), ) .into(), }; - let content = Column::new() + Column::new() .spacing(10) .padding(10) .align_items(Align::Center) .push(progress_bar) - .push(control); - - Container::new(content) - .width(Length::Fill) - .height(Length::Fill) - .center_x() - .center_y() + .push(control) .into() } } |