<?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>bookwindow.cpp Example File | Qt SQL 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="qtsql-index.html">Qt SQL</a></td><td ><a href="qtsql-books-example.html">Books</a></td><td >bookwindow.cpp 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">bookwindow.cpp Example File</h1>
<span class="subtitle">books/bookwindow.cpp</span>
<!-- $$$books/bookwindow.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications 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>
<span class="preprocessor">#include "bookwindow.h"</span>
<span class="preprocessor">#include "bookdelegate.h"</span>
<span class="preprocessor">#include "initdb.h"</span>
<span class="preprocessor">#include <QtSql></span>
BookWindow<span class="operator">::</span>BookWindow()
{
ui<span class="operator">.</span>setupUi(<span class="keyword">this</span>);
<span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>drivers()<span class="operator">.</span>contains(<span class="string">"QSQLITE"</span>))
<span class="type"><a href="../qtwidgets/qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>critical(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"Unable to load database"</span><span class="operator">,</span> <span class="string">"This demo needs the SQLITE driver"</span>);
<span class="comment">// initialize the database</span>
<span class="type"><a href="qsqlerror.html">QSqlError</a></span> err <span class="operator">=</span> initDb();
<span class="keyword">if</span> (err<span class="operator">.</span>type() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qsqlerror.html">QSqlError</a></span><span class="operator">::</span>NoError) {
showError(err);
<span class="keyword">return</span>;
}
<span class="comment">// Create the data model</span>
model <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a></span>(ui<span class="operator">.</span>bookTable);
model<span class="operator">-</span><span class="operator">></span>setEditStrategy(<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span><span class="operator">::</span>OnManualSubmit);
model<span class="operator">-</span><span class="operator">></span>setTable(<span class="string">"books"</span>);
<span class="comment">// Remember the indexes of the columns</span>
authorIdx <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"author"</span>);
genreIdx <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"genre"</span>);
<span class="comment">// Set the relations to the other database tables</span>
model<span class="operator">-</span><span class="operator">></span>setRelation(authorIdx<span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"authors"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>));
model<span class="operator">-</span><span class="operator">></span>setRelation(genreIdx<span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"genres"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>));
<span class="comment">// Set the localized header captions</span>
model<span class="operator">-</span><span class="operator">></span>setHeaderData(authorIdx<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> tr(<span class="string">"Author Name"</span>));
model<span class="operator">-</span><span class="operator">></span>setHeaderData(genreIdx<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> tr(<span class="string">"Genre"</span>));
model<span class="operator">-</span><span class="operator">></span>setHeaderData(model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"title"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> tr(<span class="string">"Title"</span>));
model<span class="operator">-</span><span class="operator">></span>setHeaderData(model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"year"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> tr(<span class="string">"Year"</span>));
model<span class="operator">-</span><span class="operator">></span>setHeaderData(model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"rating"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> tr(<span class="string">"Rating"</span>));
<span class="comment">// Populate the model</span>
<span class="keyword">if</span> (<span class="operator">!</span>model<span class="operator">-</span><span class="operator">></span>select()) {
showError(model<span class="operator">-</span><span class="operator">></span>lastError());
<span class="keyword">return</span>;
}
<span class="comment">// Set the model and hide the ID column</span>
ui<span class="operator">.</span>bookTable<span class="operator">-</span><span class="operator">></span>setModel(model);
ui<span class="operator">.</span>bookTable<span class="operator">-</span><span class="operator">></span>setItemDelegate(<span class="keyword">new</span> BookDelegate(ui<span class="operator">.</span>bookTable));
ui<span class="operator">.</span>bookTable<span class="operator">-</span><span class="operator">></span>setColumnHidden(model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"id"</span>)<span class="operator">,</span> <span class="keyword">true</span>);
ui<span class="operator">.</span>bookTable<span class="operator">-</span><span class="operator">></span>setSelectionMode(<span class="type"><a href="../qtwidgets/qabstractitemview.html">QAbstractItemView</a></span><span class="operator">::</span>SingleSelection);
<span class="comment">// Initialize the Author combo box</span>
ui<span class="operator">.</span>authorEdit<span class="operator">-</span><span class="operator">></span>setModel(model<span class="operator">-</span><span class="operator">></span>relationModel(authorIdx));
ui<span class="operator">.</span>authorEdit<span class="operator">-</span><span class="operator">></span>setModelColumn(model<span class="operator">-</span><span class="operator">></span>relationModel(authorIdx)<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"name"</span>));
ui<span class="operator">.</span>genreEdit<span class="operator">-</span><span class="operator">></span>setModel(model<span class="operator">-</span><span class="operator">></span>relationModel(genreIdx));
ui<span class="operator">.</span>genreEdit<span class="operator">-</span><span class="operator">></span>setModelColumn(model<span class="operator">-</span><span class="operator">></span>relationModel(genreIdx)<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"name"</span>));
<span class="type"><a href="../qtwidgets/qdatawidgetmapper.html">QDataWidgetMapper</a></span> <span class="operator">*</span>mapper <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qdatawidgetmapper.html">QDataWidgetMapper</a></span>(<span class="keyword">this</span>);
mapper<span class="operator">-</span><span class="operator">></span>setModel(model);
mapper<span class="operator">-</span><span class="operator">></span>setItemDelegate(<span class="keyword">new</span> BookDelegate(<span class="keyword">this</span>));
mapper<span class="operator">-</span><span class="operator">></span>addMapping(ui<span class="operator">.</span>titleEdit<span class="operator">,</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"title"</span>));
mapper<span class="operator">-</span><span class="operator">></span>addMapping(ui<span class="operator">.</span>yearEdit<span class="operator">,</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"year"</span>));
mapper<span class="operator">-</span><span class="operator">></span>addMapping(ui<span class="operator">.</span>authorEdit<span class="operator">,</span> authorIdx);
mapper<span class="operator">-</span><span class="operator">></span>addMapping(ui<span class="operator">.</span>genreEdit<span class="operator">,</span> genreIdx);
mapper<span class="operator">-</span><span class="operator">></span>addMapping(ui<span class="operator">.</span>ratingEdit<span class="operator">,</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"rating"</span>));
connect(ui<span class="operator">.</span>bookTable<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">,</span> SIGNAL(currentRowChanged(<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span><span class="operator">,</span><span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>))<span class="operator">,</span>
mapper<span class="operator">,</span> SLOT(setCurrentModelIndex(<span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>)));
ui<span class="operator">.</span>bookTable<span class="operator">-</span><span class="operator">></span>setCurrentIndex(model<span class="operator">-</span><span class="operator">></span>index(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>));
}
<span class="type">void</span> BookWindow<span class="operator">::</span>showError(<span class="keyword">const</span> <span class="type"><a href="qsqlerror.html">QSqlError</a></span> <span class="operator">&</span>err)
{
<span class="type"><a href="../qtwidgets/qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>critical(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"Unable to initialize Database"</span><span class="operator">,</span>
<span class="string">"Error initializing database: "</span> <span class="operator">+</span> err<span class="operator">.</span>text());
}
</pre>
</div>
<!-- @@@books/bookwindow.cpp -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
distrib
>
Mageia
>
6
>
armv5tl
>
media
>
core-updates
>
by-pkgid
>
768f7d9f703884aa2562bf0a651086df
>
files
>
2287
