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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+** of its contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+var curVal = 0
+var memory = 0
+var lastOp = ""
+var previousOperator = ""
+var digits = ""
+
+function disabled(op) {
+ if (op == "." && digits.toString().search(/\./) != -1) {
+ return true
+ } else if (op == window.squareRoot && digits.toString().search(/-/) != -1) {
+ return true
+ } else {
+ return false
+ }
+}
+
+function digitPressed(op)
+{
+ if (disabled(op))
+ return
+ if (digits.toString().length >= 14)
+ 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 (previousOperator == "+") {
+ digits = Number(digits.valueOf()) + Number(curVal.valueOf())
+ } else if (previousOperator == "−") {
+ digits = Number(curVal) - Number(digits.valueOf())
+ } else if (previousOperator == "×") {
+ digits = Number(curVal) * Number(digits.valueOf())
+ } else if (previousOperator == "÷") {
+ digits = Number(Number(curVal) / Number(digits.valueOf())).toString()
+ } else if (previousOperator == "=") {
+ }
+
+ if (op == "+" || op == "−" || op == "×" || op == "÷") {
+ previousOperator = op
+ curVal = digits.valueOf()
+ display.displayOperator(previousOperator)
+ return
+ }
+
+ if (op == "=") {
+ display.newLine("=", digits.toString())
+ }
+
+ 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 == window.plusminus) {
+ digits = (digits.valueOf() * -1).toString()
+ } else if (op == window.squareRoot) {
+ digits = (Math.sqrt(digits.valueOf())).toString()
+ } 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 == window.leftArrow) {
+ digits = digits.toString().slice(0, -1)
+ if (digits.length == 0) {
+ digits = "0"
+ }
+ } else if (op == "Off") {
+ Qt.quit();
+ } else if (op == "C") {
+ digits = "0"
+ } else if (op == "AC") {
+ curVal = 0
+ memory = 0
+ lastOp = ""
+ digits ="0"
+ }
+
+
+}
+