mirror of
https://github.com/FliegendeWurst/cursive.git
synced 2024-11-09 19:00:46 +00:00
Better progress bar example
Shows multiple progress bars updated together.
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c689a3ba7e
commit
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@ -16,5 +16,8 @@ toml = "0.1"
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unicode-segmentation = "0.1.2"
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unicode-width = "0.1.3"
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[dev-dependencies]
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rand = "0.3"
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[lib]
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name = "cursive"
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@ -1,49 +1,122 @@
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extern crate cursive;
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extern crate rand;
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use rand::Rng;
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use cursive::prelude::*;
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use cursive::view::{Counter, Ticker};
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use std::thread;
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use std::cmp::min;
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use std::time::Duration;
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fn main() {
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let mut siv = Cursive::new();
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// We'll start slowly with a simple start button...
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siv.add_layer(Dialog::empty()
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.title("Progress bar example")
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.padding((0, 0, 1, 1))
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.content(Button::new("Start", |s| {
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// Number of ticks
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let n_max = 1000;
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// This is the callback channel
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let cb = s.cb_sink().clone();
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s.pop_layer();
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s.add_layer(Panel::new(FullView::full_width(
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ProgressBar::new()
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.range(0, n_max)
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.with_task(move |ticker| {
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// This closure will be called in a separate thread.
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for _ in 0..n_max {
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thread::sleep(Duration::from_millis(5));
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// The ticker method increases the progress value
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ticker(1);
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}
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// When we're done, send a callback through the channel
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cb.send(Box::new(move |s| {
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s.pop_layer();
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s.add_layer(Dialog::empty()
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.title("Work done!")
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.content(TextView::new("Phew!"))
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.button("Finally!", |s| s.quit()));
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}))
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.unwrap();
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})
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)));
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})));
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.content(Button::new("Start", phase_1)));
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// Auto-refresh is currently required for animated views
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siv.set_fps(30);
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siv.run();
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}
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// Function to simulate a long process.
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fn fake_load(n_max: usize, ticker: Ticker) {
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for _ in 0..n_max {
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thread::sleep(Duration::from_millis(5));
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// The ticker method increases the progress value
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ticker(1);
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}
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}
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fn phase_1(s: &mut Cursive) {
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// Phase 1 is easy: a simple pre-loading.
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// Number of ticks
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let n_max = 500;
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// This is the callback channel
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let cb = s.cb_sink().clone();
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s.pop_layer();
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s.add_layer(Panel::new(FullView::full_width(ProgressBar::new()
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.range(0, n_max)
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.with_task(move |ticker| {
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// This closure will be called in a separate thread.
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fake_load(n_max, ticker);
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// When we're done, send a callback through the channel
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cb.send(Box::new(coffee_break)).unwrap();
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}))));
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}
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fn coffee_break(s: &mut Cursive) {
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// A little break before things get serious.
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s.pop_layer();
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s.add_layer(Dialog::empty()
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.title("Preparation complete")
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.content(TextView::new("Now, the real deal!"))
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.button("Again??", phase_2));
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}
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fn phase_2(s: &mut Cursive) {
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// Now, we'll run N tasks
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// (It could be downloading a file, extracting an archive,
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// reticulating sprites, ...)
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let n_bars = 10;
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// Each task will have its own shiny counter
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let counters: Vec<_> = (0..n_bars).map(|_| Counter::new(0)).collect();
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// To make things more interesting, we'll give a random speed to each bar
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let speeds: Vec<_> =
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(0..n_bars).map(|_| rand::thread_rng().gen_range(50, 150)).collect();
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let n_max = 100000;
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let cb = s.cb_sink().clone();
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// Let's prepare the progress bars...
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let mut linear = LinearLayout::vertical();
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for c in &counters {
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linear.add_child(ProgressBar::new()
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.max(n_max)
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.with_value(c.clone()));
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}
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s.pop_layer();
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s.add_layer(Dialog::new(FullView::full_width(linear))
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.title("Just a moment..."));
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// And we start the worker thread.
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thread::spawn(move || {
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loop {
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thread::sleep(Duration::from_millis(5));
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let mut done = true;
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for (c, s) in counters.iter().zip(&speeds) {
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let ticks = min(n_max - c.get(), *s);
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c.tick(ticks);
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if c.get() < n_max {
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done = false;
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}
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}
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if done {
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break;
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}
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}
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cb.send(Box::new(final_step)).unwrap();
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});
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}
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fn final_step(s: &mut Cursive) {
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// A little break before things get serious.
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s.pop_layer();
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s.add_layer(Dialog::empty()
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.title("Report")
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.content(TextView::new("Time travel was a success!\n\
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We went forward a few seconds!!"))
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.button("That's it?", |s| s.quit()));
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}
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