<?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>window.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-sqlwidgetmapper-example.html">SQL Widget Mapper Example</a></td><td >window.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">window.cpp Example File</h1> <span class="subtitle">sqlwidgetmapper/window.cpp</span> <!-- $$$sqlwidgetmapper/window.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 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include <QtSql></span> <span class="preprocessor">#include "window.h"</span> Window<span class="operator">::</span>Window(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span>(parent) { setupModel(); nameLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qlabel.html">QLabel</a></span>(tr(<span class="string">"Na&me:"</span>)); nameEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qlineedit.html">QLineEdit</a></span>(); addressLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qlabel.html">QLabel</a></span>(tr(<span class="string">"&Address:"</span>)); addressEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qtextedit.html">QTextEdit</a></span>(); typeLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qlabel.html">QLabel</a></span>(tr(<span class="string">"&Type:"</span>)); typeComboBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qcombobox.html">QComboBox</a></span>(); nextButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Next"</span>)); previousButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Previous"</span>)); nameLabel<span class="operator">-</span><span class="operator">></span>setBuddy(nameEdit); addressLabel<span class="operator">-</span><span class="operator">></span>setBuddy(addressEdit); typeLabel<span class="operator">-</span><span class="operator">></span>setBuddy(typeComboBox); <span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>relModel <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>relationModel(typeIndex); typeComboBox<span class="operator">-</span><span class="operator">></span>setModel(relModel); typeComboBox<span class="operator">-</span><span class="operator">></span>setModelColumn(relModel<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"description"</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> <span class="type"><a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a></span>(<span class="keyword">this</span>)); mapper<span class="operator">-</span><span class="operator">></span>addMapping(nameEdit<span class="operator">,</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"name"</span>)); mapper<span class="operator">-</span><span class="operator">></span>addMapping(addressEdit<span class="operator">,</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"address"</span>)); mapper<span class="operator">-</span><span class="operator">></span>addMapping(typeComboBox<span class="operator">,</span> typeIndex); connect(previousButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> mapper<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qdatawidgetmapper.html">QDataWidgetMapper</a></span><span class="operator">::</span>toPrevious); connect(nextButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> mapper<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qdatawidgetmapper.html">QDataWidgetMapper</a></span><span class="operator">::</span>toNext); connect(mapper<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qdatawidgetmapper.html">QDataWidgetMapper</a></span><span class="operator">::</span>currentIndexChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Window<span class="operator">::</span>updateButtons); <span class="type"><a href="../qtwidgets/qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qgridlayout.html">QGridLayout</a></span>(); layout<span class="operator">-</span><span class="operator">></span>addWidget(nameLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(nameEdit<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(previousButton<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(addressLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(addressEdit<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(nextButton<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(typeLabel<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(typeComboBox<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); setLayout(layout); setWindowTitle(tr(<span class="string">"SQL Widget Mapper"</span>)); mapper<span class="operator">-</span><span class="operator">></span>toFirst(); } <span class="type">void</span> Window<span class="operator">::</span>setupModel() { <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span> db <span class="operator">=</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>addDatabase(<span class="string">"QSQLITE"</span>); db<span class="operator">.</span>setDatabaseName(<span class="string">":memory:"</span>); <span class="keyword">if</span> (<span class="operator">!</span>db<span class="operator">.</span>open()) { <span class="type"><a href="../qtwidgets/qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>critical(<span class="number">0</span><span class="operator">,</span> tr(<span class="string">"Cannot open database"</span>)<span class="operator">,</span> tr(<span class="string">"Unable to establish a database connection.\n"</span> <span class="string">"This example needs SQLite support. Please read "</span> <span class="string">"the Qt SQL driver documentation for information how "</span> <span class="string">"to build it."</span>)<span class="operator">,</span> <span class="type"><a href="../qtwidgets/qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Cancel); <span class="keyword">return</span>; } <span class="type"><a href="qsqlquery.html">QSqlQuery</a></span> query; query<span class="operator">.</span>exec(<span class="string">"create table person (id int primary key, "</span> <span class="string">"name varchar(20), address varchar(200), typeid int)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into person values(1, 'Alice', "</span> <span class="string">"'<qt>123 Main Street<br/>Market Town</qt>', 101)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into person values(2, 'Bob', "</span> <span class="string">"'<qt>PO Box 32<br/>Mail Handling Service"</span> <span class="string">"<br/>Service City</qt>', 102)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into person values(3, 'Carol', "</span> <span class="string">"'<qt>The Lighthouse<br/>Remote Island</qt>', 103)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into person values(4, 'Donald', "</span> <span class="string">"'<qt>47338 Park Avenue<br/>Big City</qt>', 101)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into person values(5, 'Emma', "</span> <span class="string">"'<qt>Research Station<br/>Base Camp<br/>"</span> <span class="string">"Big Mountain</qt>', 103)"</span>); query<span class="operator">.</span>exec(<span class="string">"create table addresstype (id int, description varchar(20))"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into addresstype values(101, 'Home')"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into addresstype values(102, 'Work')"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into addresstype values(103, 'Other')"</span>); model <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a></span>(<span class="keyword">this</span>); model<span class="operator">-</span><span class="operator">></span>setTable(<span class="string">"person"</span>); 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); typeIndex <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>fieldIndex(<span class="string">"typeid"</span>); model<span class="operator">-</span><span class="operator">></span>setRelation(typeIndex<span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"addresstype"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"description"</span>)); model<span class="operator">-</span><span class="operator">></span>select(); } <span class="type">void</span> Window<span class="operator">::</span>updateButtons(<span class="type">int</span> row) { previousButton<span class="operator">-</span><span class="operator">></span>setEnabled(row <span class="operator">></span> <span class="number">0</span>); nextButton<span class="operator">-</span><span class="operator">></span>setEnabled(row <span class="operator"><</span> model<span class="operator">-</span><span class="operator">></span>rowCount() <span class="operator">-</span> <span class="number">1</span>); } </pre> </div> <!-- @@@sqlwidgetmapper/window.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>