use fltk::{
app, button::Button, enums::Align, frame::Frame, group::Flex, misc::HelpView, prelude::*,
window::Window,
};
use std::{thread, time::Duration};
#[derive(Debug, Clone, Copy)]
pub enum Message {
Increment,
Decrement,
Activate,
Deactivate,
Message(&'static str),
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
let app = app::App::default();
let mut wind = Window::default().with_size(160, 200).with_label("Counter");
let mut col = Flex::default()
.with_size(120, 140)
.center_of(&wind)
.column();
col.set_spacing(10);
let mut but_inc = Button::default().with_label("+");
let mut frame = Frame::default().with_label("0");
let mut but_dec = Button::default().with_label("-");
col.end();
wind.end();
wind.show();
let mut msg_wind = Window::default().with_size(120, 100).with_label("Message");
let mut msgview = HelpView::default().with_size(120, 100);
msgview.set_align(Align::Center);
msg_wind.end();
let (s, r) = app::channel::<Message>();
but_inc.set_callback({
move |_| {
s.send(Message::Deactivate);
thread::spawn(move || {
thread::sleep(Duration::from_secs(1));
s.send(Message::Increment);
s.send(Message::Message("Incremented"));
s.send(Message::Activate);
});
}
});
but_dec.set_callback({
move |_| {
s.send(Message::Deactivate);
thread::spawn(move || {
thread::sleep(Duration::from_secs(1));
s.send(Message::Decrement);
s.send(Message::Message("Decremented"));
s.send(Message::Activate);
});
}
});
while app.wait() {
if let Some(msg) = r.recv() {
let label: i32 = frame.label().parse()?;
match msg {
Message::Increment => frame.set_label(&(label + 1).to_string()),
Message::Decrement => frame.set_label(&(label - 1).to_string()),
Message::Activate => {
but_inc.activate();
but_dec.activate();
}
Message::Deactivate => {
but_inc.deactivate();
but_dec.deactivate();
}
Message::Message(s) => {
msgview.set_value(s);
msg_wind.show();
}
}
}
}
Ok(())
}