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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 282 insertions, 0 deletions

diff --git a/examples/sql/masterdetail/dialog.cpp b/examples/sql/masterdetail/dialog.cpp
new file mode 100644
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+++ b/examples/sql/masterdetail/dialog.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** 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 Nokia Corporation and its Subsidiary(-ies) 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "dialog.h"
+
+int uniqueAlbumId;
+int uniqueArtistId;
+
+Dialog::Dialog(QSqlRelationalTableModel *albums, QDomDocument details,
+               QFile *output, QWidget *parent)
+     : QDialog(parent)
+{
+    model = albums;
+    albumDetails = details;
+    outputFile = output;
+
+    QGroupBox *inputWidgetBox = createInputWidgets();
+    QDialogButtonBox *buttonBox = createButtons();
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->addWidget(inputWidgetBox);
+    layout->addWidget(buttonBox);
+    setLayout(layout);
+
+    setWindowTitle(tr("Add Album"));
+}
+
+void Dialog::submit()
+{
+    QString artist = artistEditor->text();
+    QString title = titleEditor->text();
+
+    if (artist.isEmpty() || title.isEmpty()) {
+        QString message(tr("Please provide both the name of the artist "
+                           "and the title of the album."));
+        QMessageBox::information(this, tr("Add Album"), message);
+    } else {
+        int artistId = findArtistId(artist);
+        int albumId = addNewAlbum(title, artistId);
+
+        QStringList tracks;
+        tracks = tracksEditor->text().split(',', QString::SkipEmptyParts);
+        addTracks(albumId, tracks);
+
+        increaseAlbumCount(indexOfArtist(artist));
+        accept();
+    }
+}
+
+int Dialog::findArtistId(const QString &artist)
+{
+    QSqlTableModel *artistModel = model->relationModel(2);
+    int row = 0;
+
+    while (row < artistModel->rowCount()) {
+        QSqlRecord record = artistModel->record(row);
+        if (record.value("artist") == artist)
+            return record.value("id").toInt();
+        else
+            row++;
+    }
+    return addNewArtist(artist);
+}
+
+
+int Dialog::addNewArtist(const QString &name)
+{
+    QSqlTableModel *artistModel = model->relationModel(2);
+    QSqlRecord record;
+
+    int id = generateArtistId();
+
+    QSqlField f1("id", QVariant::Int);
+    QSqlField f2("artist", QVariant::String);
+    QSqlField f3("albumcount", QVariant::Int);
+
+    f1.setValue(QVariant(id));
+    f2.setValue(QVariant(name));
+    f3.setValue(QVariant(0));
+    record.append(f1);
+    record.append(f2);
+    record.append(f3);
+
+    artistModel->insertRecord(-1, record);
+    return id;
+}
+
+int Dialog::addNewAlbum(const QString &title, int artistId)
+{
+    int id = generateAlbumId();
+    QSqlRecord record;
+
+    QSqlField f1("albumid", QVariant::Int);
+    QSqlField f2("title", QVariant::String);
+    QSqlField f3("artistid", QVariant::Int);
+    QSqlField f4("year", QVariant::Int);
+
+    f1.setValue(QVariant(id));
+    f2.setValue(QVariant(title));
+    f3.setValue(QVariant(artistId));
+    f4.setValue(QVariant(yearEditor->value()));
+    record.append(f1);
+    record.append(f2);
+    record.append(f3);
+    record.append(f4);
+
+    model->insertRecord(-1, record);
+    return id;
+}
+
+void Dialog::addTracks(int albumId, QStringList tracks)
+{
+    QDomElement albumNode = albumDetails.createElement("album");
+    albumNode.setAttribute("id", albumId);
+
+    for (int i = 0; i < tracks.count(); i++) {
+        QString trackNumber = QString::number(i);
+        if (i < 10)
+            trackNumber.prepend("0");
+
+        QDomText textNode = albumDetails.createTextNode(tracks.at(i));
+
+        QDomElement trackNode = albumDetails.createElement("track");
+        trackNode.setAttribute("number", trackNumber);
+        trackNode.appendChild(textNode);
+
+        albumNode.appendChild(trackNode);
+    }
+
+    QDomNodeList archive = albumDetails.elementsByTagName("archive");
+    archive.item(0).appendChild(albumNode);
+
+/*
+    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();
+    }
+*/
+}
+
+void Dialog::increaseAlbumCount(QModelIndex artistIndex)
+{
+    QSqlTableModel *artistModel = model->relationModel(2);
+
+    QModelIndex albumCountIndex;
+    albumCountIndex = artistIndex.sibling(artistIndex.row(), 2);
+
+    int albumCount = albumCountIndex.data().toInt();
+    artistModel->setData(albumCountIndex, QVariant(albumCount + 1));
+}
+
+
+void Dialog::revert()
+{
+    artistEditor->clear();
+    titleEditor->clear();
+    yearEditor->setValue(QDate::currentDate().year());
+    tracksEditor->clear();
+}
+
+QGroupBox *Dialog::createInputWidgets()
+{
+    QGroupBox *box = new QGroupBox(tr("Add Album"));
+
+    QLabel *artistLabel = new QLabel(tr("Artist:"));
+    QLabel *titleLabel = new QLabel(tr("Title:"));
+    QLabel *yearLabel = new QLabel(tr("Year:"));
+    QLabel *tracksLabel = new QLabel(tr("Tracks (separated by comma):"));
+
+    artistEditor = new QLineEdit;
+    titleEditor = new QLineEdit;
+
+    yearEditor = new QSpinBox;
+    yearEditor->setMinimum(1900);
+    yearEditor->setMaximum(QDate::currentDate().year());
+    yearEditor->setValue(yearEditor->maximum());
+    yearEditor->setReadOnly(false);
+
+    tracksEditor = new QLineEdit;
+
+    QGridLayout *layout = new QGridLayout;
+    layout->addWidget(artistLabel, 0, 0);
+    layout->addWidget(artistEditor, 0, 1);
+    layout->addWidget(titleLabel, 1, 0);
+    layout->addWidget(titleEditor, 1, 1);
+    layout->addWidget(yearLabel, 2, 0);
+    layout->addWidget(yearEditor, 2, 1);
+    layout->addWidget(tracksLabel, 3, 0, 1, 2);
+    layout->addWidget(tracksEditor, 4, 0, 1, 2);
+    box->setLayout(layout);
+
+    return box;
+}
+
+QDialogButtonBox *Dialog::createButtons()
+{
+    QPushButton *closeButton = new QPushButton(tr("&Close"));
+    QPushButton *revertButton = new QPushButton(tr("&Revert"));
+    QPushButton *submitButton = new QPushButton(tr("&Submit"));
+
+    closeButton->setDefault(true);
+
+    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
+    connect(revertButton, SIGNAL(clicked()), this, SLOT(revert()));
+    connect(submitButton, SIGNAL(clicked()), this, SLOT(submit()));
+
+    QDialogButtonBox *buttonBox = new QDialogButtonBox;
+    buttonBox->addButton(submitButton, QDialogButtonBox::ResetRole);
+    buttonBox->addButton(revertButton, QDialogButtonBox::ResetRole);
+    buttonBox->addButton(closeButton, QDialogButtonBox::RejectRole);
+
+    return buttonBox;
+}
+
+QModelIndex Dialog::indexOfArtist(const QString &artist)
+{
+    QSqlTableModel *artistModel = model->relationModel(2);
+
+    for (int i = 0; i < artistModel->rowCount(); i++) {
+        QSqlRecord record =  artistModel->record(i);
+        if (record.value("artist") == artist)
+            return artistModel->index(i, 1);
+    }
+
+    return QModelIndex();
+}
+
+int Dialog::generateArtistId()
+{
+    uniqueArtistId += 1;
+    return uniqueArtistId;
+}
+
+int Dialog::generateAlbumId()
+{
+    uniqueAlbumId += 1;
+    return uniqueAlbumId;
+}