use fltk::{app, frame::Frame, prelude::*, window::Window};
#[derive(Debug, Copy, Clone)]
pub enum Message {
Increment(i32),
Decrement(i32),
}
fn inc_frame(frame: &mut Frame, val: &mut i32, step: i32) {
*val += step;
frame.set_label(&val.to_string());
}
fn main() {
let app = app::App::default();
let mut wind = Window::default().with_size(400, 300);
let mut frame = Frame::default().size_of(&wind).with_label("0");
let mut val = 0;
wind.show();
let (s, r) = app::channel::<Message>();
std::thread::spawn(move || loop {
app::sleep(1.);
s.send(Message::Increment(2));
});
while app.wait() {
if let Some(Message::Increment(step)) = r.recv() {
inc_frame(&mut frame, &mut val, step)
}
}
}