1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
//! The overall example used in README and the library docstring.
use std::io::Write; // to support write!()
// 1. Define a struct holding all the application state necessary to
// render the progress bar.
#[derive(Default)]
struct Model {
i: usize,
total: usize,
last_file_name: String,
}
// 2. Define how to render the progress bar as a String.
impl nutmeg::Model for Model {
fn render(&mut self, _width: usize) -> String {
format!("{}/{}: {}", self.i, self.total, self.last_file_name)
}
}
fn main() -> std::io::Result<()> {
// 3. Create a View when you want to draw a progress bar.
let mut view = nutmeg::View::new(Model::default(), nutmeg::Options::default());
// 4. As the application runs, update the model via the view.
let total_work = 100;
view.update(|model| model.total = total_work);
for i in 0..total_work {
view.update(|model| {
model.i += 1;
model.last_file_name = format!("file{i}.txt");
});
// 5. Interleave text output lines by writing to the view.
if i % 10 == 3 {
writeln!(view, "reached {i}")?;
}
std::thread::sleep(std::time::Duration::from_millis(100));
}
// 5. The bar is automatically erased when dropped.
Ok(())
}
|
