<?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>Display.qml 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 >Display.qml 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">Display.qml Example File</h1> <span class="subtitle">demos/calqlatr/content/Display.qml</span> <!-- $$$demos/calqlatr/content/Display.qml-description --> <div class="descr"> <a name="details"></a> <pre class="qml"> /**************************************************************************** ** ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ import QtQuick 2.0 import QtQuick.Window 2.0 Item { id: display property real fontSize: Math.floor(Screen.pixelDensity * 5.0) property bool enteringDigits: false property int maxDigits: (width / fontSize) + 1 property string displayedOperand property string errorString: qsTr("ERROR") property bool isError: displayedOperand === errorString function displayOperator(operator) { listView.model.append({ "operator": operator, "operand": "" }) enteringDigits = true listView.positionViewAtEnd() } function newLine(operator, operand) { displayedOperand = displayNumber(operand) listView.model.append({ "operator": operator, "operand": displayedOperand }) enteringDigits = false listView.positionViewAtEnd() } function appendDigit(digit) { if (!enteringDigits) listView.model.append({ "operator": "", "operand": "" }) var i = listView.model.count - 1; listView.model.get(i).operand = listView.model.get(i).operand + digit; enteringDigits = true listView.positionViewAtEnd() } function setDigit(digit) { var i = listView.model.count - 1; listView.model.get(i).operand = digit; listView.positionViewAtEnd() } function clear() { displayedOperand = "" if (enteringDigits) { var i = listView.model.count - 1 if (i >= 0) listView.model.remove(i) enteringDigits = false } } // Returns a string representation of a number that fits in // display.maxDigits characters, trying to keep as much precision // as possible. If the number cannot be displayed, returns an // error string. function displayNumber(num) { if (typeof(num) != "number") return errorString; var intNum = parseInt(num); var intLen = intNum.toString().length; // Do not count the minus sign as a digit var maxLen = num < 0 ? maxDigits + 1 : maxDigits; if (num.toString().length <= maxLen) { if (isFinite(num)) return num.toString(); return errorString; } // Integer part of the number is too long - try // an exponential notation if (intNum == num || intLen > maxLen - 3) { var expVal = num.toExponential(maxDigits - 6).toString(); if (expVal.length <= maxLen) return expVal; } // Try a float presentation with fixed number of digits var floatStr = parseFloat(num).toFixed(maxDigits - intLen - 1).toString(); if (floatStr.length <= maxLen) return floatStr; return errorString; } Item { id: theItem width: parent.width + 32 height: parent.height Rectangle { id: rect x: 16 color: "white" height: parent.height width: display.width - 16 } Image { anchors.right: rect.left source: "images/paper-edge-left.png" height: parent.height fillMode: Image.TileVertically } Image { anchors.left: rect.right source: "images/paper-edge-right.png" height: parent.height fillMode: Image.TileVertically } Image { id: grip source: "images/paper-grip.png" anchors.horizontalCenter: parent.horizontalCenter anchors.bottom: parent.bottom anchors.bottomMargin: 20 } ListView { id: listView x: 16; y: 30 width: display.width height: display.height - 50 - y delegate: Item { height: display.fontSize * 1.1 width: parent.width Text { id: operator x: 6 font.pixelSize: display.fontSize color: "#6da43d" text: model.operator } Text { id: operand font.pixelSize: display.fontSize anchors.right: parent.right anchors.rightMargin: 22 text: model.operand } } model: ListModel { } } } } </pre> </div> <!-- @@@demos/calqlatr/content/Display.qml --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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