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#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 =newQVBoxLayout;
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(constQString&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(constQString&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(constQString&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,constQStringList&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 =newQGroupBox(tr("Add Album"));
QLabel*artistLabel =newQLabel(tr("Artist:"));
QLabel*titleLabel =newQLabel(tr("Title:"));
QLabel*yearLabel =newQLabel(tr("Year:"));
QLabel*tracksLabel =newQLabel(tr("Tracks (separated by comma):"));
artistEditor =newQLineEdit;
titleEditor =newQLineEdit;
yearEditor =newQSpinBox;
yearEditor->setMinimum(1900);
yearEditor->setMaximum(QDate::currentDate().year());
yearEditor->setValue(yearEditor->maximum());
yearEditor->setReadOnly(false);
tracksEditor =newQLineEdit;
QGridLayout*layout =newQGridLayout;
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 =newQPushButton(tr("&Close"));
QPushButton*revertButton =newQPushButton(tr("&Revert"));
QPushButton*submitButton =newQPushButton(tr("&Submit"));
closeButton->setDefault(true);
connect(closeButton,&QPushButton::clicked,this,&Dialog::close);
connect(revertButton,&QPushButton::clicked,this,&Dialog::revert);
connect(submitButton,&QPushButton::clicked,this,&Dialog::submit);
QDialogButtonBox*buttonBox =newQDialogButtonBox;
buttonBox->addButton(submitButton,QDialogButtonBox::ResetRole);
buttonBox->addButton(revertButton,QDialogButtonBox::ResetRole);
buttonBox->addButton(closeButton,QDialogButtonBox::RejectRole);
return buttonBox;
}
QModelIndex Dialog::indexOfArtist(constQString&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);
}
returnQModelIndex();
}
int Dialog::generateArtistId()
{
uniqueArtistId +=1;
return uniqueArtistId;
}
int Dialog::generateAlbumId()
{
uniqueAlbumId +=1;
return uniqueAlbumId;
}