qt5base-lts/examples/sql/masterdetail/dialog.cpp
Jason McDonald 5635823e17 Remove "All rights reserved" line from license headers.
As in the past, to avoid rewriting various autotests that contain
line-number information, an extra blank line has been inserted at the
end of the license text to ensure that this commit does not change the
total number of lines in the license header.

Change-Id: I311e001373776812699d6efc045b5f742890c689
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
2012-01-30 03:54:59 +01:00

283 lines
8.5 KiB
C++

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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;
}