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rcalc
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it maths! what more could u want?

This commit is contained in:
Raatty 2018-12-04 23:04:12 +13:00
parent 086b5b58e4
commit 73a0d968c3
1 changed files with 113 additions and 8 deletions
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121
src/main.rs
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@ -1,6 +1,8 @@
extern crate gtk;
use gtk::prelude::*;
use gtk::{Button, Window, WindowType};
use std::cell::RefCell;
use std::rc::Rc;
enum Operators {
PLUS,
@ -13,6 +15,7 @@ struct Calc {
left: String,
right: String,
operator: Option<Operators>,
label: gtk::Label,
}
impl Calc {
@ -20,21 +23,41 @@ impl Calc {
match self.operator {
None => self.left.push_str(&button),
Some(_) => self.right.push_str(&button),
}
};
self.display();
}
fn eval(&mut self) -> u32 {
fn eval(&mut self) {
let left = self.left.parse::<u32>().unwrap();
let right = self.right.parse::<u32>().unwrap();
return match self.operator {
let ans = match self.operator {
Some(Operators::PLUS) => left + right,
Some(Operators::MINUS) => left - right,
Some(Operators::DIVIDE) => left / right,
Some(Operators::MULTIPLY) => left * right,
None => panic!("oh noes")
}
None => panic!("oh noes"),
};
self.right = String::new();
self.operator = None;
self.left = ans.to_string();
self.display();
}
fn new() -> Self {
Calc{left: String::new(), right: String::new(), operator: None}
Calc {
left: String::new(),
right: String::new(),
operator: None,
label: gtk::Label::new(Some("")),
}
}
fn display(&self) {
let text = match self.operator {
Some(Operators::PLUS) => self.left.clone() + "+" + &self.right,
Some(Operators::MINUS) => self.left.clone() + "-" + &self.right,
Some(Operators::DIVIDE) => self.left.clone() + "/" + &self.right,
Some(Operators::MULTIPLY) => self.left.clone() + "*" + &self.right,
None => self.left.clone(),
};
self.label.set_label(&text);
}
}
@ -43,51 +66,133 @@ fn main() {
println!("failed to init GTK");
return;
}
let calc = Calc::new();
let calc = Rc::new(RefCell::new(Calc::new()));
let window: Window = Window::new(WindowType::Toplevel);
window.set_title("Rust calc");
let container = gtk::Box::new(gtk::Orientation::Vertical, 1);
// row 0
let cal0 = calc.clone();
container.add(&cal0.borrow().label);
// row 1
let row1 = gtk::Box::new(gtk::Orientation::Horizontal, 1);
let button1 = Button::new_with_label("1");
row1.add(&button1);
button1.connect_clicked(|but| calc.handle_number(but.get_label().unwrap()));
let cal1 = calc.clone();
button1.connect_clicked(move |but| {
cal1.borrow_mut().handle_number(but.get_label().unwrap());
});
let button2 = Button::new_with_label("2");
row1.add(&button2);
let cal2 = calc.clone();
button2.connect_clicked(move |but| {
cal2.borrow_mut().handle_number(but.get_label().unwrap());
});
let button3 = Button::new_with_label("3");
row1.add(&button3);
let cal3 = calc.clone();
button3.connect_clicked(move |but| {
cal3.borrow_mut().handle_number(but.get_label().unwrap());
});
// row 2
let row2 = gtk::Box::new(gtk::Orientation::Horizontal, 1);
let button4 = Button::new_with_label("4");
row2.add(&button4);
let cal4 = calc.clone();
button4.connect_clicked(move |but| {
cal4.borrow_mut().handle_number(but.get_label().unwrap());
});
let button5 = Button::new_with_label("5");
row2.add(&button5);
let cal5 = calc.clone();
button5.connect_clicked(move |but| {
cal5.borrow_mut().handle_number(but.get_label().unwrap());
});
let button6 = Button::new_with_label("6");
row2.add(&button6);
let cal6 = calc.clone();
button6.connect_clicked(move |but| {
cal6.borrow_mut().handle_number(but.get_label().unwrap());
});
// row 3
let row3 = gtk::Box::new(gtk::Orientation::Horizontal, 1);
let button7 = Button::new_with_label("7");
row3.add(&button7);
let cal7 = calc.clone();
button7.connect_clicked(move |but| {
cal7.borrow_mut().handle_number(but.get_label().unwrap());
});
let button8 = Button::new_with_label("8");
row3.add(&button8);
let cal8 = calc.clone();
button8.connect_clicked(move |but| {
cal8.borrow_mut().handle_number(but.get_label().unwrap());
});
let button9 = Button::new_with_label("9");
row3.add(&button9);
let cal9 = calc.clone();
button9.connect_clicked(move |but| {
cal9.borrow_mut().handle_number(but.get_label().unwrap());
});
// row 4
let row4 = gtk::Box::new(gtk::Orientation::Horizontal, 1);
let button0 = Button::new_with_label("0");
row4.add(&button0);
let cal0 = calc.clone();
button0.connect_clicked(move |but| {
cal0.borrow_mut().handle_number(but.get_label().unwrap());
});
let button_sub = Button::new_with_label("-");
row4.add(&button_sub);
let cal_sub = calc.clone();
button_sub.connect_clicked(move |_| {
let mut cal_sub_borrowed = cal_sub.borrow_mut();
cal_sub_borrowed.operator = Some(Operators::MINUS);
cal_sub_borrowed.display();
});
let button_add = Button::new_with_label("+");
row4.add(&button_add);
let cal_add = calc.clone();
button_add.connect_clicked(move |_| {
let mut cal_add_borrowed = cal_add.borrow_mut();
cal_add_borrowed.operator = Some(Operators::PLUS);
cal_add_borrowed.display();
});
// row 5
let row5 = gtk::Box::new(gtk::Orientation::Horizontal, 1);
let button_mult = Button::new_with_label("*");
row5.add(&button_mult);
let cal_mult = calc.clone();
button_mult.connect_clicked(move |_| {
let mut cal_mult_borrowed = cal_mult.borrow_mut();
cal_mult_borrowed.operator = Some(Operators::MULTIPLY);
cal_mult_borrowed.display();
});
let button_div = Button::new_with_label("/");
row5.add(&button_div);
let cal_div = calc.clone();
button_div.connect_clicked(move |_| {
let mut cal_div_borrowed = cal_div.borrow_mut();
cal_div_borrowed.operator = Some(Operators::DIVIDE);
cal_div_borrowed.display();
});
let button_equals = Button::new_with_label("=");
row5.add(&button_equals);
let cal_eq = calc.clone();
button_equals.connect_clicked(move |_| {
let mut cal_eq_borrowed = cal_eq.borrow_mut();
cal_eq_borrowed.eval();
});
// add rows to window
container.add(&row1);
container.add(&row2);