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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">bookwindow.cpp Example File</h1> <span class="small-subtitle">demos/books/bookwindow.cpp</span> <!-- $$$demos/books/bookwindow.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** 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 Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Digia gives you certain additional ** rights. These rights are described in the Digia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/</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="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="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="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="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="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="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="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="qdatawidgetmapper.html">QDataWidgetMapper</a></span> <span class="operator">*</span>mapper <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="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="qmodelindex.html">QModelIndex</a></span><span class="operator">,</span><span class="type"><a href="qmodelindex.html">QModelIndex</a></span>))<span class="operator">,</span> mapper<span class="operator">,</span> SLOT(setCurrentModelIndex(<span class="type"><a href="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="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> <!-- @@@demos/books/bookwindow.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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