<?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>localstorage.qml Example File | Qt Quick 5.9</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 >Qt 5.9</td><td ><a href="qtquick-index.html">Qt Quick</a></td><td ><a href="qtquick-localstorage-example.html">Qt Quick Examples - Local Storage</a></td><td >localstorage.qml Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 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">localstorage.qml Example File</h1> <span class="subtitle">localstorage/localstorage/localstorage.qml</span> <!-- $$$localstorage/localstorage/localstorage.qml-description --> <div class="descr"> <a name="details"></a> <pre class="qml"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the documentation 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> import QtQuick 2.5 import QtQuick.Window 2.2 import QtQuick.Layouts 1.1 import QtQuick.LocalStorage 2.0 import "Database.js" as JS <span class="type"><a href="qml-qtquick-window-window.html">Window</a></span> { <span class="name">visible</span>: <span class="number">true</span> <span class="name">width</span>: <span class="name">Screen</span>.<span class="name">width</span> <span class="operator">/</span> <span class="number">2</span> <span class="name">height</span>: <span class="name">Screen</span>.<span class="name">height</span> <span class="operator">/</span> <span class="number">1.8</span> <span class="name">color</span>: <span class="string">"#161616"</span> property <span class="type">bool</span> <span class="name">creatingNewEntry</span>: <span class="number">false</span> property <span class="type">bool</span> <span class="name">editingEntry</span>: <span class="number">false</span> <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="type"><a href="qml-qtquick-layouts-columnlayout.html">ColumnLayout</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="type">Header</span> { <span class="name">id</span>: <span class="name">input</span> <span class="name">Layout</span>.fillWidth: <span class="number">true</span> } <span class="type"><a href="qml-qtquick-layouts-rowlayout.html">RowLayout</a></span> { <span class="type">MyButton</span> { <span class="name">text</span>: <span class="string">"New"</span> <span class="name">onClicked</span>: { <span class="name">input</span>.<span class="name">initrec_new</span>() <span class="name">creatingNewEntry</span> <span class="operator">=</span> <span class="number">true</span> <span class="name">listView</span>.<span class="name">model</span>.<span class="name">setProperty</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>, <span class="string">"id"</span>, <span class="number">0</span>) } } <span class="type">MyButton</span> { <span class="name">id</span>: <span class="name">saveButton</span> <span class="name">enabled</span>: (<span class="name">creatingNewEntry</span> <span class="operator">||</span> <span class="name">editingEntry</span>) <span class="operator">&&</span> <span class="name">listView</span>.<span class="name">currentIndex</span> <span class="operator">!=</span> -<span class="number">1</span> <span class="name">text</span>: <span class="string">"Save"</span> <span class="name">onClicked</span>: { var <span class="name">insertedRow</span> = <span class="number">false</span>; <span class="keyword">if</span> (<span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">id</span> <span class="operator"><</span> <span class="number">1</span>) { <span class="comment">//insert mode</span> <span class="keyword">if</span> (<span class="name">input</span>.<span class="name">insertrec</span>()) { <span class="comment">// Successfully inserted a row.</span> <span class="name">input</span>.<span class="name">setlistview</span>() <span class="name">insertedRow</span> <span class="operator">=</span> <span class="number">true</span> } <span class="keyword">else</span> { <span class="comment">// Failed to insert a row; display an error message.</span> <span class="name">statustext</span>.<span class="name">text</span> <span class="operator">=</span> <span class="string">"Failed to insert row"</span> } } <span class="keyword">else</span> { <span class="comment">// edit mode</span> <span class="name">input</span>.<span class="name">setlistview</span>() <span class="name">JS</span>.<span class="name">dbUpdate</span>(<span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">date</span>, <span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">trip_desc</span>, <span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">distance</span>, <span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">id</span>) } <span class="keyword">if</span> (<span class="name">insertedRow</span>) { <span class="name">input</span>.<span class="name">initrec</span>() <span class="name">creatingNewEntry</span> <span class="operator">=</span> <span class="number">false</span> <span class="name">editingEntry</span> <span class="operator">=</span> <span class="number">false</span> <span class="name">listView</span>.<span class="name">forceLayout</span>() } } } <span class="type">MyButton</span> { <span class="name">id</span>: <span class="name">editButton</span> <span class="name">text</span>: <span class="string">"Edit"</span> <span class="name">enabled</span>: !<span class="name">creatingNewEntry</span> <span class="operator">&&</span> !<span class="name">editingEntry</span> <span class="operator">&&</span> <span class="name">listView</span>.<span class="name">currentIndex</span> <span class="operator">!=</span> -<span class="number">1</span> <span class="name">onClicked</span>: { <span class="name">input</span>.<span class="name">editrec</span>(<span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">date</span>, <span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">trip_desc</span>, <span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">distance</span>, <span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">id</span>) <span class="name">editingEntry</span> <span class="operator">=</span> <span class="number">true</span> } } <span class="type">MyButton</span> { <span class="name">id</span>: <span class="name">deleteButton</span> <span class="name">text</span>: <span class="string">"Delete"</span> <span class="name">enabled</span>: !<span class="name">creatingNewEntry</span> <span class="operator">&&</span> <span class="name">listView</span>.<span class="name">currentIndex</span> <span class="operator">!=</span> -<span class="number">1</span> <span class="name">onClicked</span>: { <span class="name">JS</span>.<span class="name">dbDeleteRow</span>(<span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">id</span>) <span class="name">listView</span>.<span class="name">model</span>.<span class="name">remove</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>, <span class="number">1</span>) <span class="keyword">if</span> (<span class="name">listView</span>.<span class="name">count</span> <span class="operator">==</span> <span class="number">0</span>) { <span class="comment">// ListView doesn't automatically set its currentIndex to -1</span> <span class="comment">// when the count becomes 0.</span> <span class="name">listView</span>.<span class="name">currentIndex</span> <span class="operator">=</span> -<span class="number">1</span> } } } <span class="type">MyButton</span> { <span class="name">id</span>: <span class="name">cancelButton</span> <span class="name">text</span>: <span class="string">"Cancel"</span> <span class="name">enabled</span>: (<span class="name">creatingNewEntry</span> <span class="operator">||</span> <span class="name">editingEntry</span>) <span class="operator">&&</span> <span class="name">listView</span>.<span class="name">currentIndex</span> <span class="operator">!=</span> -<span class="number">1</span> <span class="name">onClicked</span>: { <span class="keyword">if</span> (<span class="name">listView</span>.<span class="name">model</span>.<span class="name">get</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>).<span class="name">id</span> <span class="operator">===</span> <span class="number">0</span>) { <span class="comment">// This entry had an id of 0, which means it was being created and hadn't</span> <span class="comment">// been saved to the database yet, so we can safely remove it from the model.</span> <span class="name">listView</span>.<span class="name">model</span>.<span class="name">remove</span>(<span class="name">listView</span>.<span class="name">currentIndex</span>, <span class="number">1</span>) } <span class="name">listView</span>.<span class="name">forceLayout</span>() <span class="name">creatingNewEntry</span> <span class="operator">=</span> <span class="number">false</span> <span class="name">editingEntry</span> <span class="operator">=</span> <span class="number">false</span> <span class="name">input</span>.<span class="name">initrec</span>() } } <span class="type">MyButton</span> { <span class="name">text</span>: <span class="string">"Exit"</span> <span class="name">onClicked</span>: <span class="name">Qt</span>.<span class="name">quit</span>() } } <span class="type">Component</span> { <span class="name">id</span>: <span class="name">highlightBar</span> <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">width</span>: <span class="name">listView</span>.<span class="name">currentItem</span>.<span class="name">width</span> <span class="name">height</span>: <span class="name">listView</span>.<span class="name">currentItem</span>.<span class="name">height</span> <span class="name">color</span>: <span class="string">"lightgreen"</span> } } <span class="type"><a href="qml-qtquick-listview.html">ListView</a></span> { <span class="name">id</span>: <span class="name">listView</span> <span class="name">Layout</span>.fillWidth: <span class="number">true</span> <span class="name">Layout</span>.fillHeight: <span class="number">true</span> <span class="name">model</span>: <span class="name">MyModel</span> {} <span class="name">delegate</span>: <span class="name">MyDelegate</span> {} <span class="comment">// Don't allow changing the currentIndex while the user is creating/editing values.</span> <span class="name">enabled</span>: !<span class="name">creatingNewEntry</span> <span class="operator">&&</span> !<span class="name">editingEntry</span> <span class="name">highlight</span>: <span class="name">highlightBar</span> <span class="name">highlightFollowsCurrentItem</span>: <span class="number">true</span> <span class="name">focus</span>: <span class="number">true</span> <span class="name">header</span>: <span class="name">Component</span> { <span class="type"><a href="qml-qtquick-text.html">Text</a></span> { <span class="name">text</span>: <span class="string">"Saved activities"</span> } } } <span class="type"><a href="qml-qtquick-text.html">Text</a></span> { <span class="name">id</span>: <span class="name">statustext</span> <span class="name">color</span>: <span class="string">"red"</span> <span class="name">Layout</span>.fillWidth: <span class="number">true</span> <span class="name">font</span>.bold: <span class="number">true</span> <span class="name">font</span>.pointSize: <span class="number">20</span> } } } <span class="name">Component</span>.onCompleted: { <span class="name">JS</span>.<span class="name">dbInit</span>() } } </pre> </div> <!-- @@@localstorage/localstorage/localstorage.qml --> 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