ui_guessing_game

main.rs

use rand::Rng;
use std::cell::RefCell;
use std::cmp::Ordering;
use std::rc::Rc;
extern crate iui;
use iui::controls::{Button, Entry, Label, VerticalBox};
use iui::prelude::*;

struct State {
    entry_val: String,
}

fn main() {
    let ui = UI::init().expect("Couldn't initialize UI library");
    let state = Rc::new(RefCell::new(State {
        entry_val: "".into(),
    }));
    let mut win = Window::new(&ui, "Guess the number", 200, 200, WindowType::NoMenubar);
    let secret_number = rand::thread_rng().gen_range(1, 101);

    let label_text = String::from("Guess the number!");
    let label = Label::new(&ui, &label_text);
    let result_label_text = String::from("Please input your guess");
    let result_label = Label::new(&ui, &result_label_text);
    let conclusion_label_text = String::from("...");
    let conclusion_label = Label::new(&ui, &conclusion_label_text);

    let mut entry = Entry::new(&ui);
    entry.on_changed(&ui, {
        let state = state.clone();
        move |val| {
            state.borrow_mut().entry_val = val;
        }
    });

    let mut button = Button::new(&ui, "Submit");
    button.on_clicked(&ui, {
        let ui = ui.clone();
        let _guess = String::new();
        let mut result_label = result_label.clone();
        let mut conclusion_label = conclusion_label.clone();

        move |_| {
            let state = state.borrow();
            let guess: u32 = match state.entry_val.trim().parse() {
                Ok(num) => num,
                Err(_) => return,
            };

            result_label.set_text(&ui, &format!("You guessed {}", guess));

            match guess.cmp(&secret_number) {
                Ordering::Less => conclusion_label.set_text(&ui, "Too small!"),
                Ordering::Greater => conclusion_label.set_text(&ui, "Too big!"),
                Ordering::Equal => conclusion_label.set_text(&ui, "You win!"),
            }
        }
    });

    let mut exit_button = Button::new(&ui, "Exit");
    exit_button.on_clicked(&ui, {
        let ui = ui.clone();
        move |_| {
            ui.quit();
        }
    });

    let mut vbox = VerticalBox::new(&ui);
    vbox.set_padded(&ui, true);
    vbox.append(&ui, label, LayoutStrategy::Stretchy);
    vbox.append(&ui, result_label, LayoutStrategy::Stretchy);
    vbox.append(&ui, conclusion_label, LayoutStrategy::Stretchy);
    vbox.append(&ui, entry, LayoutStrategy::Compact);
    vbox.append(&ui, button, LayoutStrategy::Compact);
    vbox.append(&ui, exit_button, LayoutStrategy::Compact);

    win.set_child(&ui, vbox);
    win.show(&ui);
    ui.main();
}