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"use strict";
// replace_with_your_name - Lab 2 js file.
let operationClicked = ''; // The operation that was clicked.
let previousAreaClicked = ''; // The previous area that was clicked.
let currentNumberEntered = ''; // The current number entered.
let previousNumberEntered = '0'; // The previous number entered.
let calculatorOn = false; // Remember if the calculator is on or off.
function _Initialize() {
turnCalculatorOnOff(false);
}
/**
* Perform the calculator button function.
*
* @param {object} e - The area that was clicked on.
* @return (false) Stops the area href from being opened.
*/
function areaClicked(e) {
let btnClicked = e.title;
console.log(`btnClicked = ${btnClicked}`);
if (calculatorOn) {
switch (btnClicked) {
case '1':
case '5':
previousAreaClicked = btnClicked;
addKeyToCurrentNumberEntered(btnClicked);
setDisplay(currentNumberEntered);
break;
case '=':
console.log(`previousNumberEntered = ${previousNumberEntered}`);
console.log(`operationClicked = ${operationClicked}`);
console.log(`currentNumberEntered = ${currentNumberEntered}`);
break;
case '+':
operationClicked = btnClicked;
previousNumberEntered = currentNumberEntered;
currentNumberEntered = '0';
setDisplay(btnClicked);
break;
case 'on':
if (calculatorOn) {
turnCalculatorOnOff(false); // Turn off the calculator.
}
break;
default:
console.log(`${btnClicked} not programmed.`);
}
} else {
if ( btnClicked === 'on' ) {
turnCalculatorOnOff(true); // Turn on the calculator.
}
}
return false;
} // END areaClicked.
function turnCalculatorOnOff(onOff) {
calculatorOn = onOff;
previousAreaClicked = '';
currentNumberEntered = '0';
previousNumberEntered = '';
if (calculatorOn) {
document.getElementById('calculatorDisplay').style.backgroundColor = 'silver';
} else {
document.getElementById('calculatorDisplay').style.backgroundColor = 'black';
}
setDisplay(currentNumberEntered);
}
function addKeyToCurrentNumberEntered(numberClicked) {
if (+currentNumberEntered) {
currentNumberEntered += numberClicked;
} else {
currentNumberEntered = numberClicked;
}
}
function setDisplay(displayValue) {
document.getElementById('calculatorDisplay').innerText = displayValue;
}