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<h1 class="title">browser.cpp Example File</h1>
<span class="small-subtitle">demos/sqlbrowser/browser.cpp</span>
<!-- $$$demos/sqlbrowser/browser.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company 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 "browser.h"</span>
<span class="preprocessor">#include "qsqlconnectiondialog.h"</span>
<span class="preprocessor">#include <QtGui></span>
<span class="preprocessor">#include <QtSql></span>
Browser<span class="operator">::</span>Browser(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
setupUi(<span class="keyword">this</span>);
table<span class="operator">-</span><span class="operator">></span>addAction(insertRowAction);
table<span class="operator">-</span><span class="operator">></span>addAction(deleteRowAction);
<span class="keyword">if</span> (<span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>drivers()<span class="operator">.</span>isEmpty())
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"No database drivers found"</span>)<span class="operator">,</span>
tr(<span class="string">"This demo requires at least one Qt database driver. "</span>
<span class="string">"Please check the documentation how to build the "</span>
<span class="string">"Qt SQL plugins."</span>));
<span class="keyword">emit</span> statusMessage(tr(<span class="string">"Ready."</span>));
}
Browser<span class="operator">::</span><span class="operator">~</span>Browser()
{
}
<span class="type">void</span> Browser<span class="operator">::</span>exec()
{
<span class="type"><a href="qsqlquerymodel.html">QSqlQueryModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsqlquerymodel.html">QSqlQueryModel</a></span>(table);
model<span class="operator">-</span><span class="operator">></span>setQuery(<span class="type"><a href="qsqlquery.html">QSqlQuery</a></span>(sqlEdit<span class="operator">-</span><span class="operator">></span>toPlainText()<span class="operator">,</span> connectionWidget<span class="operator">-</span><span class="operator">></span>currentDatabase()));
table<span class="operator">-</span><span class="operator">></span>setModel(model);
<span class="keyword">if</span> (model<span class="operator">-</span><span class="operator">></span>lastError()<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)
<span class="keyword">emit</span> statusMessage(model<span class="operator">-</span><span class="operator">></span>lastError()<span class="operator">.</span>text());
<span class="keyword">else</span> <span class="keyword">if</span> (model<span class="operator">-</span><span class="operator">></span>query()<span class="operator">.</span>isSelect())
<span class="keyword">emit</span> statusMessage(tr(<span class="string">"Query OK."</span>));
<span class="keyword">else</span>
<span class="keyword">emit</span> statusMessage(tr(<span class="string">"Query OK, number of affected rows: %1"</span>)<span class="operator">.</span>arg(
model<span class="operator">-</span><span class="operator">></span>query()<span class="operator">.</span>numRowsAffected()));
updateActions();
}
<span class="type"><a href="qsqlerror.html">QSqlError</a></span> Browser<span class="operator">::</span>addConnection(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>driver<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>dbName<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>host<span class="operator">,</span>
<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>user<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>passwd<span class="operator">,</span> <span class="type">int</span> port)
{
<span class="keyword">static</span> <span class="type">int</span> cCount <span class="operator">=</span> <span class="number">0</span>;
<span class="type"><a href="qsqlerror.html">QSqlError</a></span> err;
<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(driver<span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"Browser%1"</span>)<span class="operator">.</span>arg(<span class="operator">+</span><span class="operator">+</span>cCount));
db<span class="operator">.</span>setDatabaseName(dbName);
db<span class="operator">.</span>setHostName(host);
db<span class="operator">.</span>setPort(port);
<span class="keyword">if</span> (<span class="operator">!</span>db<span class="operator">.</span>open(user<span class="operator">,</span> passwd)) {
err <span class="operator">=</span> db<span class="operator">.</span>lastError();
db <span class="operator">=</span> <span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span>();
<span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>removeDatabase(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"Browser%1"</span>)<span class="operator">.</span>arg(cCount));
}
connectionWidget<span class="operator">-</span><span class="operator">></span>refresh();
<span class="keyword">return</span> err;
}
<span class="type">void</span> Browser<span class="operator">::</span>addConnection()
{
<span class="type">QSqlConnectionDialog</span> dialog(<span class="keyword">this</span>);
<span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted)
<span class="keyword">return</span>;
<span class="keyword">if</span> (dialog<span class="operator">.</span>useInMemoryDatabase()) {
<span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>database(<span class="string">"in_mem_db"</span><span class="operator">,</span> <span class="keyword">false</span>)<span class="operator">.</span>close();
<span class="type"><a href="qsqldatabase.html">QSqlDatabase</a></span><span class="operator">::</span>removeDatabase(<span class="string">"in_mem_db"</span>);
<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><span class="operator">,</span> <span class="string">"in_mem_db"</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="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Unable to open database"</span>)<span class="operator">,</span> tr(<span class="string">"An error occurred while "</span>
<span class="string">"opening the connection: "</span>) <span class="operator">+</span> db<span class="operator">.</span>lastError()<span class="operator">.</span>text());
<span class="type"><a href="qsqlquery.html">QSqlQuery</a></span> q(<span class="string">""</span><span class="operator">,</span> db);
q<span class="operator">.</span>exec(<span class="string">"drop table Movies"</span>);
q<span class="operator">.</span>exec(<span class="string">"drop table Names"</span>);
q<span class="operator">.</span>exec(<span class="string">"create table Movies (id integer primary key, Title varchar, Director varchar, Rating number)"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Movies values (0, 'Metropolis', 'Fritz Lang', '8.4')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Movies values (1, 'Nosferatu, eine Symphonie des Grauens', 'F.W. Murnau', '8.1')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Movies values (2, 'Bis ans Ende der Welt', 'Wim Wenders', '6.5')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Movies values (3, 'Hardware', 'Richard Stanley', '5.2')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Movies values (4, 'Mitchell', 'Andrew V. McLaglen', '2.1')"</span>);
q<span class="operator">.</span>exec(<span class="string">"create table Names (id integer primary key, Firstname varchar, Lastname varchar, City varchar)"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Names values (0, 'Sala', 'Palmer', 'Morristown')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Names values (1, 'Christopher', 'Walker', 'Morristown')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Names values (2, 'Donald', 'Duck', 'Andeby')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Names values (3, 'Buck', 'Rogers', 'Paris')"</span>);
q<span class="operator">.</span>exec(<span class="string">"insert into Names values (4, 'Sherlock', 'Holmes', 'London')"</span>);
connectionWidget<span class="operator">-</span><span class="operator">></span>refresh();
} <span class="keyword">else</span> {
<span class="type"><a href="qsqlerror.html">QSqlError</a></span> err <span class="operator">=</span> addConnection(dialog<span class="operator">.</span>driverName()<span class="operator">,</span> dialog<span class="operator">.</span>databaseName()<span class="operator">,</span> dialog<span class="operator">.</span>hostName()<span class="operator">,</span>
dialog<span class="operator">.</span>userName()<span class="operator">,</span> dialog<span class="operator">.</span>password()<span class="operator">,</span> dialog<span class="operator">.</span>port());
<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)
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Unable to open database"</span>)<span class="operator">,</span> tr(<span class="string">"An error occurred while "</span>
<span class="string">"opening the connection: "</span>) <span class="operator">+</span> err<span class="operator">.</span>text());
}
}
<span class="type">void</span> Browser<span class="operator">::</span>showTable(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>t)
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span>(table<span class="operator">,</span> connectionWidget<span class="operator">-</span><span class="operator">></span>currentDatabase());
model<span class="operator">-</span><span class="operator">></span>setEditStrategy(<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span><span class="operator">::</span>OnRowChange);
model<span class="operator">-</span><span class="operator">></span>setTable(connectionWidget<span class="operator">-</span><span class="operator">></span>currentDatabase()<span class="operator">.</span>driver()<span class="operator">-</span><span class="operator">></span>escapeIdentifier(t<span class="operator">,</span> <span class="type"><a href="qsqldriver.html">QSqlDriver</a></span><span class="operator">::</span>TableName));
model<span class="operator">-</span><span class="operator">></span>select();
<span class="keyword">if</span> (model<span class="operator">-</span><span class="operator">></span>lastError()<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)
<span class="keyword">emit</span> statusMessage(model<span class="operator">-</span><span class="operator">></span>lastError()<span class="operator">.</span>text());
table<span class="operator">-</span><span class="operator">></span>setModel(model);
table<span class="operator">-</span><span class="operator">></span>setEditTriggers(<span class="type"><a href="qabstractitemview.html">QAbstractItemView</a></span><span class="operator">::</span>DoubleClicked<span class="operator">|</span><span class="type"><a href="qabstractitemview.html">QAbstractItemView</a></span><span class="operator">::</span>EditKeyPressed);
connect(table<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>
<span class="keyword">this</span><span class="operator">,</span> SLOT(currentChanged()));
updateActions();
}
<span class="type">void</span> Browser<span class="operator">::</span>showMetaData(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>t)
{
<span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> rec <span class="operator">=</span> connectionWidget<span class="operator">-</span><span class="operator">></span>currentDatabase()<span class="operator">.</span>record(t);
<span class="type"><a href="qstandarditemmodel.html">QStandardItemModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstandarditemmodel.html">QStandardItemModel</a></span>(table);
model<span class="operator">-</span><span class="operator">></span>insertRows(<span class="number">0</span><span class="operator">,</span> rec<span class="operator">.</span>count());
model<span class="operator">-</span><span class="operator">></span>insertColumns(<span class="number">0</span><span class="operator">,</span> <span class="number">7</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"Fieldname"</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"Type"</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"Length"</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">3</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"Precision"</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">4</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"Required"</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">5</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"AutoValue"</span>);
model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">6</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="string">"DefaultValue"</span>);
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> rec<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> fld <span class="operator">=</span> rec<span class="operator">.</span>field(i);
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">0</span>)<span class="operator">,</span> fld<span class="operator">.</span>name());
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">1</span>)<span class="operator">,</span> fld<span class="operator">.</span>typeID() <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>
<span class="operator">?</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>typeToName(fld<span class="operator">.</span>type()))
: <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"%1 (%2)"</span>)<span class="operator">.</span>arg(<span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>typeToName(fld<span class="operator">.</span>type()))<span class="operator">.</span>arg(fld<span class="operator">.</span>typeID()));
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">2</span>)<span class="operator">,</span> fld<span class="operator">.</span>length());
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">3</span>)<span class="operator">,</span> fld<span class="operator">.</span>precision());
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">4</span>)<span class="operator">,</span> fld<span class="operator">.</span>requiredStatus() <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">?</span> <span class="type"><a href="qvariant.html">QVariant</a></span>(<span class="string">"?"</span>)
: <span class="type"><a href="qvariant.html">QVariant</a></span>(<span class="type">bool</span>(fld<span class="operator">.</span>requiredStatus())));
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">5</span>)<span class="operator">,</span> fld<span class="operator">.</span>isAutoValue());
model<span class="operator">-</span><span class="operator">></span>setData(model<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">6</span>)<span class="operator">,</span> fld<span class="operator">.</span>defaultValue());
}
table<span class="operator">-</span><span class="operator">></span>setModel(model);
table<span class="operator">-</span><span class="operator">></span>setEditTriggers(<span class="type"><a href="qabstractitemview.html">QAbstractItemView</a></span><span class="operator">::</span>NoEditTriggers);
updateActions();
}
<span class="type">void</span> Browser<span class="operator">::</span>insertRow()
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span><span class="operator">></span>(table<span class="operator">-</span><span class="operator">></span>model());
<span class="keyword">if</span> (<span class="operator">!</span>model)
<span class="keyword">return</span>;
<span class="type"><a href="qmodelindex.html">QModelIndex</a></span> insertIndex <span class="operator">=</span> table<span class="operator">-</span><span class="operator">></span>currentIndex();
<span class="type">int</span> row <span class="operator">=</span> insertIndex<span class="operator">.</span>row() <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">?</span> <span class="number">0</span> : insertIndex<span class="operator">.</span>row();
model<span class="operator">-</span><span class="operator">></span>insertRow(row);
insertIndex <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>index(row<span class="operator">,</span> <span class="number">0</span>);
table<span class="operator">-</span><span class="operator">></span>setCurrentIndex(insertIndex);
table<span class="operator">-</span><span class="operator">></span>edit(insertIndex);
}
<span class="type">void</span> Browser<span class="operator">::</span>deleteRow()
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>model <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span><span class="operator">></span>(table<span class="operator">-</span><span class="operator">></span>model());
<span class="keyword">if</span> (<span class="operator">!</span>model)
<span class="keyword">return</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);
<span class="type"><a href="qmodelindex.html#QModelIndexList-typedef">QModelIndexList</a></span> currentSelection <span class="operator">=</span> table<span class="operator">-</span><span class="operator">></span>selectionModel()<span class="operator">-</span><span class="operator">></span>selectedIndexes();
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> currentSelection<span class="operator">.</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">if</span> (currentSelection<span class="operator">.</span>at(i)<span class="operator">.</span>column() <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>)
<span class="keyword">continue</span>;
model<span class="operator">-</span><span class="operator">></span>removeRow(currentSelection<span class="operator">.</span>at(i)<span class="operator">.</span>row());
}
model<span class="operator">-</span><span class="operator">></span>submitAll();
model<span class="operator">-</span><span class="operator">></span>setEditStrategy(<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span><span class="operator">::</span>OnRowChange);
updateActions();
}
<span class="type">void</span> Browser<span class="operator">::</span>updateActions()
{
<span class="type">bool</span> enableIns <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span><span class="operator">></span>(table<span class="operator">-</span><span class="operator">></span>model());
<span class="type">bool</span> enableDel <span class="operator">=</span> enableIns <span class="operator">&</span><span class="operator">&</span> table<span class="operator">-</span><span class="operator">></span>currentIndex()<span class="operator">.</span>isValid();
insertRowAction<span class="operator">-</span><span class="operator">></span>setEnabled(enableIns);
deleteRowAction<span class="operator">-</span><span class="operator">></span>setEnabled(enableDel);
}
<span class="type">void</span> Browser<span class="operator">::</span>about()
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About"</span>)<span class="operator">,</span> tr(<span class="string">"The SQL Browser demonstration "</span>
<span class="string">"shows how a data browser can be used to visualize the results of SQL"</span>
<span class="string">"statements on a live database"</span>));
}</pre>
</div>
<!-- @@@demos/sqlbrowser/browser.cpp -->
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armv7hl
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core-updates
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