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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
var curVal = 0
var memory = 0
var lastOp = ""
var previousOperator = ""
var digits = ""
function disabled(op) {
if (digits == "" && !((op >= "0" && op <= "9") || op == "."))
return true
else if (op == '=' && previousOperator.length != 1)
return true
else if (op == "." && digits.toString().search(/\./) != -1) {
return true
} else if (op == "√" && digits.toString().search(/-/) != -1) {
return true
} else {
return false
}
}
function digitPressed(op)
{
if (disabled(op))
return
if (digits.toString().length >= display.maxDigits)
return
if (lastOp.toString().length == 1 && ((lastOp >= "0" && lastOp <= "9") || lastOp == ".") ) {
digits = digits + op.toString()
display.appendDigit(op.toString())
} else {
digits = op
display.appendDigit(op.toString())
}
lastOp = op
}
function operatorPressed(op)
{
if (disabled(op))
return
lastOp = op
if (op == "±") {
digits = Number(digits.valueOf() * -1)
display.setDigit(display.displayNumber(digits))
return
}
if (previousOperator == "+") {
digits = Number(digits.valueOf()) + Number(curVal.valueOf())
} else if (previousOperator == "−") {
digits = Number(curVal.valueOf()) - Number(digits.valueOf())
} else if (previousOperator == "×") {
digits = Number(curVal) * Number(digits.valueOf())
} else if (previousOperator == "÷") {
digits = Number(curVal) / Number(digits.valueOf())
}
if (op == "+" || op == "−" || op == "×" || op == "÷") {
previousOperator = op
curVal = digits.valueOf()
digits = ""
display.displayOperator(previousOperator)
return
}
if (op == "=") {
display.newLine("=", digits.valueOf())
}
curVal = 0
previousOperator = ""
if (op == "1/x") {
digits = (1 / digits.valueOf()).toString()
} else if (op == "x^2") {
digits = (digits.valueOf() * digits.valueOf()).toString()
} else if (op == "Abs") {
digits = (Math.abs(digits.valueOf())).toString()
} else if (op == "Int") {
digits = (Math.floor(digits.valueOf())).toString()
} else if (op == "√") {
digits = Number(Math.sqrt(digits.valueOf()))
display.newLine("√", digits.valueOf())
} else if (op == "mc") {
memory = 0;
} else if (op == "m+") {
memory += digits.valueOf()
} else if (op == "mr") {
digits = memory.toString()
} else if (op == "m-") {
memory = digits.valueOf()
} else if (op == "backspace") {
digits = digits.toString().slice(0, -1)
display.clear()
display.appendDigit(digits)
} else if (op == "Off") {
Qt.quit();
}
// Reset the state on 'C' operator or after
// an error occurred
if (op == "C" || display.isError) {
display.clear()
curVal = 0
memory = 0
lastOp = ""
digits = ""
}
}
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