temp_converter/
temp_converter.rs

1use fltk::{prelude::*, *};
2
3fn main() {
4    let app = app::App::default().with_scheme(app::Scheme::Gleam);
5    let mut win = window::Window::default().with_size(150, 200);
6    let mut col = group::Flex::default()
7        .column()
8        .with_size(130, 180)
9        .center_of(&win);
10    col.set_pad(5);
11    frame::Frame::default()
12        .with_size(0, 40)
13        .with_label("Celcius")
14        .with_align(enums::Align::Inside | enums::Align::Bottom);
15    let mut inp1 = input::FloatInput::default().with_size(0, 40);
16    frame::Frame::default()
17        .with_size(0, 40)
18        .with_label("Farenheit")
19        .with_align(enums::Align::Inside | enums::Align::Bottom);
20    let mut inp2 = input::FloatInput::default().with_size(0, 40);
21    col.end();
22    win.end();
23    win.show();
24
25    inp1.set_value(&format!("{}", 0.0));
26    inp2.set_value(&format!("{}", 32.0));
27
28    inp1.set_trigger(enums::CallbackTrigger::Changed);
29    inp2.set_trigger(enums::CallbackTrigger::Changed);
30
31    inp1.set_callback({
32        let mut inp2 = inp2.clone();
33        move |i| {
34            let inp1_val: f64 = if i.value().is_empty() {
35                0.0
36            } else {
37                i.value().parse().unwrap_or(0.0)
38            };
39            inp2.set_value(&format!("{:.4}", c_to_f(inp1_val)));
40        }
41    });
42    inp2.set_callback(move |i| {
43        let inp2_val: f64 = if i.value().is_empty() {
44            0.0
45        } else {
46            i.value().parse().unwrap_or(0.0)
47        };
48        inp1.set_value(&format!("{:.4}", f_to_c(inp2_val)));
49    });
50
51    app.run().unwrap();
52}
53
54fn c_to_f(val: f64) -> f64 {
55    (val * 9.0 / 5.0) + 32.0
56}
57
58fn f_to_c(val: f64) -> f64 {
59    (val - 32.0) * 5.0 / 9.0
60}
temp_converter/temp_converter.rs

temp_converter/
temp_converter.rs
