<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>calculator.js Example File | Qt 5.12</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td ><a href="index.html">Qt 5.12</a></td><td ><a href="qtdoc-demos-calqlatr-example.html">Qt Quick Demo - Calqlatr</a></td><td >calculator.js Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.12.6 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">calculator.js Example File</h1> <span class="subtitle">demos/calqlatr/content/calculator.js</span> <!-- $$$demos/calqlatr/content/calculator.js-description --> <div class="descr"> <a name="details"></a> <pre class="js"> /**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, 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 The Qt Company Ltd 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 (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 = "" } } </pre> </div> <!-- @@@demos/calqlatr/content/calculator.js --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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