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<h1 class="title">dialog.cpp Example File</h1>
<span class="small-subtitle">sql/masterdetail/dialog.cpp</span>
<!-- $$$sql/masterdetail/dialog.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 examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 "dialog.h"</span>
<span class="type">int</span> uniqueAlbumId;
<span class="type">int</span> uniqueArtistId;
Dialog<span class="operator">::</span>Dialog(<span class="type"><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a></span> <span class="operator">*</span>albums<span class="operator">,</span> <span class="type"><a href="qdomdocument.html">QDomDocument</a></span> details<span class="operator">,</span>
<span class="type"><a href="qfile.html">QFile</a></span> <span class="operator">*</span>output<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)
{
model <span class="operator">=</span> albums;
albumDetails <span class="operator">=</span> details;
outputFile <span class="operator">=</span> output;
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>inputWidgetBox <span class="operator">=</span> createInputWidgets();
<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span> <span class="operator">*</span>buttonBox <span class="operator">=</span> createButtons();
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
layout<span class="operator">-</span><span class="operator">></span>addWidget(inputWidgetBox);
layout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox);
setLayout(layout);
setWindowTitle(tr(<span class="string">"Add Album"</span>));
}
<span class="type">void</span> Dialog<span class="operator">::</span>submit()
{
<span class="type"><a href="qstring.html">QString</a></span> artist <span class="operator">=</span> artistEditor<span class="operator">-</span><span class="operator">></span>text();
<span class="type"><a href="qstring.html">QString</a></span> title <span class="operator">=</span> titleEditor<span class="operator">-</span><span class="operator">></span>text();
<span class="keyword">if</span> (artist<span class="operator">.</span>isEmpty() <span class="operator">|</span><span class="operator">|</span> title<span class="operator">.</span>isEmpty()) {
<span class="type"><a href="qstring.html">QString</a></span> message(tr(<span class="string">"Please provide both the name of the artist "</span>
<span class="string">"and the title of the album."</span>));
<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">"Add Album"</span>)<span class="operator">,</span> message);
} <span class="keyword">else</span> {
<span class="type">int</span> artistId <span class="operator">=</span> findArtistId(artist);
<span class="type">int</span> albumId <span class="operator">=</span> addNewAlbum(title<span class="operator">,</span> artistId);
<span class="type"><a href="qstringlist.html">QStringList</a></span> tracks;
tracks <span class="operator">=</span> tracksEditor<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>split(<span class="char">','</span><span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>SkipEmptyParts);
addTracks(albumId<span class="operator">,</span> tracks);
increaseAlbumCount(indexOfArtist(artist));
accept();
}
}
<span class="type">int</span> Dialog<span class="operator">::</span>findArtistId(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>artist)
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>artistModel <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>relationModel(<span class="number">2</span>);
<span class="type">int</span> row <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">while</span> (row <span class="operator"><</span> artistModel<span class="operator">-</span><span class="operator">></span>rowCount()) {
<span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> record <span class="operator">=</span> artistModel<span class="operator">-</span><span class="operator">></span>record(row);
<span class="keyword">if</span> (record<span class="operator">.</span>value(<span class="string">"artist"</span>) <span class="operator">=</span><span class="operator">=</span> artist)
<span class="keyword">return</span> record<span class="operator">.</span>value(<span class="string">"id"</span>)<span class="operator">.</span>toInt();
<span class="keyword">else</span>
row<span class="operator">+</span><span class="operator">+</span>;
}
<span class="keyword">return</span> addNewArtist(artist);
}
<span class="type">int</span> Dialog<span class="operator">::</span>addNewArtist(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>name)
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>artistModel <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>relationModel(<span class="number">2</span>);
<span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> record;
<span class="type">int</span> id <span class="operator">=</span> generateArtistId();
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f1(<span class="string">"id"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>Int);
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f2(<span class="string">"artist"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>String);
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f3(<span class="string">"albumcount"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>Int);
f1<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(id));
f2<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(name));
f3<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(<span class="number">0</span>));
record<span class="operator">.</span>append(f1);
record<span class="operator">.</span>append(f2);
record<span class="operator">.</span>append(f3);
artistModel<span class="operator">-</span><span class="operator">></span>insertRecord(<span class="operator">-</span><span class="number">1</span><span class="operator">,</span> record);
<span class="keyword">return</span> id;
}
<span class="type">int</span> Dialog<span class="operator">::</span>addNewAlbum(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>title<span class="operator">,</span> <span class="type">int</span> artistId)
{
<span class="type">int</span> id <span class="operator">=</span> generateAlbumId();
<span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> record;
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f1(<span class="string">"albumid"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>Int);
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f2(<span class="string">"title"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>String);
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f3(<span class="string">"artistid"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>Int);
<span class="type"><a href="qsqlfield.html">QSqlField</a></span> f4(<span class="string">"year"</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>Int);
f1<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(id));
f2<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(title));
f3<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(artistId));
f4<span class="operator">.</span>setValue(<span class="type"><a href="qvariant.html">QVariant</a></span>(yearEditor<span class="operator">-</span><span class="operator">></span>value()));
record<span class="operator">.</span>append(f1);
record<span class="operator">.</span>append(f2);
record<span class="operator">.</span>append(f3);
record<span class="operator">.</span>append(f4);
model<span class="operator">-</span><span class="operator">></span>insertRecord(<span class="operator">-</span><span class="number">1</span><span class="operator">,</span> record);
<span class="keyword">return</span> id;
}
<span class="type">void</span> Dialog<span class="operator">::</span>addTracks(<span class="type">int</span> albumId<span class="operator">,</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> tracks)
{
<span class="type"><a href="qdomelement.html">QDomElement</a></span> albumNode <span class="operator">=</span> albumDetails<span class="operator">.</span>createElement(<span class="string">"album"</span>);
albumNode<span class="operator">.</span>setAttribute(<span class="string">"id"</span><span class="operator">,</span> albumId);
<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> tracks<span class="operator">.</span>count(); i<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qstring.html">QString</a></span> trackNumber <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>number(i);
<span class="keyword">if</span> (i <span class="operator"><</span> <span class="number">10</span>)
trackNumber<span class="operator">.</span>prepend(<span class="string">"0"</span>);
<span class="type"><a href="qdomtext.html">QDomText</a></span> textNode <span class="operator">=</span> albumDetails<span class="operator">.</span>createTextNode(tracks<span class="operator">.</span>at(i));
<span class="type"><a href="qdomelement.html">QDomElement</a></span> trackNode <span class="operator">=</span> albumDetails<span class="operator">.</span>createElement(<span class="string">"track"</span>);
trackNode<span class="operator">.</span>setAttribute(<span class="string">"number"</span><span class="operator">,</span> trackNumber);
trackNode<span class="operator">.</span>appendChild(textNode);
albumNode<span class="operator">.</span>appendChild(trackNode);
}
<span class="type"><a href="qdomnodelist.html">QDomNodeList</a></span> archive <span class="operator">=</span> albumDetails<span class="operator">.</span>elementsByTagName(<span class="string">"archive"</span>);
archive<span class="operator">.</span>item(<span class="number">0</span>)<span class="operator">.</span>appendChild(albumNode);
<span class="comment">/*
The following code is commented out since the example uses an in
memory database, i.e., altering the XML file will bring the data
out of sync.
if (!outputFile->open(QIODevice::WriteOnly)) {
return;
} else {
QTextStream stream(outputFile);
archive.item(0).save(stream, 4);
outputFile->close();
}
*/</span>
}
<span class="type">void</span> Dialog<span class="operator">::</span>increaseAlbumCount(<span class="type"><a href="qmodelindex.html">QModelIndex</a></span> artistIndex)
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>artistModel <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>relationModel(<span class="number">2</span>);
<span class="type"><a href="qmodelindex.html">QModelIndex</a></span> albumCountIndex;
albumCountIndex <span class="operator">=</span> artistIndex<span class="operator">.</span>sibling(artistIndex<span class="operator">.</span>row()<span class="operator">,</span> <span class="number">2</span>);
<span class="type">int</span> albumCount <span class="operator">=</span> albumCountIndex<span class="operator">.</span>data()<span class="operator">.</span>toInt();
artistModel<span class="operator">-</span><span class="operator">></span>setData(albumCountIndex<span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span>(albumCount <span class="operator">+</span> <span class="number">1</span>));
}
<span class="type">void</span> Dialog<span class="operator">::</span>revert()
{
artistEditor<span class="operator">-</span><span class="operator">></span>clear();
titleEditor<span class="operator">-</span><span class="operator">></span>clear();
yearEditor<span class="operator">-</span><span class="operator">></span>setValue(<span class="type"><a href="qdate.html">QDate</a></span><span class="operator">::</span>currentDate()<span class="operator">.</span>year());
tracksEditor<span class="operator">-</span><span class="operator">></span>clear();
}
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>Dialog<span class="operator">::</span>createInputWidgets()
{
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>box <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">"Add Album"</span>));
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>artistLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Artist:"</span>));
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>titleLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Title:"</span>));
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>yearLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Year:"</span>));
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>tracksLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Tracks (separated by comma):"</span>));
artistEditor <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
titleEditor <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
yearEditor <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qspinbox.html">QSpinBox</a></span>;
yearEditor<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="number">1900</span>);
yearEditor<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="type"><a href="qdate.html">QDate</a></span><span class="operator">::</span>currentDate()<span class="operator">.</span>year());
yearEditor<span class="operator">-</span><span class="operator">></span>setValue(yearEditor<span class="operator">-</span><span class="operator">></span>maximum());
yearEditor<span class="operator">-</span><span class="operator">></span>setReadOnly(<span class="keyword">false</span>);
tracksEditor <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>;
<span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
layout<span class="operator">-</span><span class="operator">></span>addWidget(artistLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
layout<span class="operator">-</span><span class="operator">></span>addWidget(artistEditor<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>);
layout<span class="operator">-</span><span class="operator">></span>addWidget(titleLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>);
layout<span class="operator">-</span><span class="operator">></span>addWidget(titleEditor<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(yearLabel<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>);
layout<span class="operator">-</span><span class="operator">></span>addWidget(yearEditor<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(tracksLabel<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">2</span>);
layout<span class="operator">-</span><span class="operator">></span>addWidget(tracksEditor<span class="operator">,</span> <span class="number">4</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">2</span>);
box<span class="operator">-</span><span class="operator">></span>setLayout(layout);
<span class="keyword">return</span> box;
}
<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span> <span class="operator">*</span>Dialog<span class="operator">::</span>createButtons()
{
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>closeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Close"</span>));
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>revertButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Revert"</span>));
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>submitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Submit"</span>));
closeButton<span class="operator">-</span><span class="operator">></span>setDefault(<span class="keyword">true</span>);
connect(closeButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close()));
connect(revertButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(revert()));
connect(submitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(submit()));
<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span> <span class="operator">*</span>buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span>;
buttonBox<span class="operator">-</span><span class="operator">></span>addButton(submitButton<span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ResetRole);
buttonBox<span class="operator">-</span><span class="operator">></span>addButton(revertButton<span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ResetRole);
buttonBox<span class="operator">-</span><span class="operator">></span>addButton(closeButton<span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>RejectRole);
<span class="keyword">return</span> buttonBox;
}
<span class="type"><a href="qmodelindex.html">QModelIndex</a></span> Dialog<span class="operator">::</span>indexOfArtist(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>artist)
{
<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>artistModel <span class="operator">=</span> model<span class="operator">-</span><span class="operator">></span>relationModel(<span class="number">2</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> artistModel<span class="operator">-</span><span class="operator">></span>rowCount(); i<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qsqlrecord.html">QSqlRecord</a></span> record <span class="operator">=</span> artistModel<span class="operator">-</span><span class="operator">></span>record(i);
<span class="keyword">if</span> (record<span class="operator">.</span>value(<span class="string">"artist"</span>) <span class="operator">=</span><span class="operator">=</span> artist)
<span class="keyword">return</span> artistModel<span class="operator">-</span><span class="operator">></span>index(i<span class="operator">,</span> <span class="number">1</span>);
}
<span class="keyword">return</span> <span class="type"><a href="qmodelindex.html">QModelIndex</a></span>();
}
<span class="type">int</span> Dialog<span class="operator">::</span>generateArtistId()
{
uniqueArtistId <span class="operator">+</span><span class="operator">=</span> <span class="number">1</span>;
<span class="keyword">return</span> uniqueArtistId;
}
<span class="type">int</span> Dialog<span class="operator">::</span>generateAlbumId()
{
uniqueAlbumId <span class="operator">+</span><span class="operator">=</span> <span class="number">1</span>;
<span class="keyword">return</span> uniqueAlbumId;
}</pre>
</div>
<!-- @@@sql/masterdetail/dialog.cpp -->
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