author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 00:43:10 +0200 (2010-02-01) | |
changeset 3 | 41300fa6a67c |
parent 0 | 1918ee327afb |
child 4 | 3b1da2848fc7 |
permissions | -rw-r--r-- |
0 | 1 |
/**************************************************************************** |
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** |
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the examples of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include "mainwindow.h" |
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#include "dialog.h" |
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#include <QtGui> |
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#include <QtSql> |
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#include <QtXml> |
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extern int uniqueAlbumId; |
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extern int uniqueArtistId; |
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MainWindow::MainWindow(const QString &artistTable, const QString &albumTable, |
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QFile *albumDetails, QWidget *parent) |
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: QMainWindow(parent) |
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{ |
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file = albumDetails; |
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readAlbumData(); |
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model = new QSqlRelationalTableModel(this); |
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model->setTable(albumTable); |
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model->setRelation(2, QSqlRelation(artistTable, "id", "artist")); |
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model->select(); |
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QGroupBox *artists = createArtistGroupBox(); |
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QGroupBox *albums = createAlbumGroupBox(); |
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QGroupBox *details = createDetailsGroupBox(); |
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artistView->setCurrentIndex(0); |
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uniqueAlbumId = model->rowCount(); |
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uniqueArtistId = artistView->count(); |
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3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
72 |
connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)), |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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this, SLOT(updateHeader(QModelIndex,int,int))); |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
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connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)), |
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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this, SLOT(updateHeader(QModelIndex,int,int))); |
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QGridLayout *layout = new QGridLayout; |
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layout->addWidget(artists, 0, 0); |
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layout->addWidget(albums, 1, 0); |
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layout->addWidget(details, 0, 1, 2, 1); |
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layout->setColumnStretch(1, 1); |
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layout->setColumnMinimumWidth(0, 500); |
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QWidget *widget = new QWidget; |
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widget->setLayout(layout); |
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setCentralWidget(widget); |
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createMenuBar(); |
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showImageLabel(); |
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resize(850, 400); |
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setWindowTitle(tr("Music Archive")); |
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} |
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void MainWindow::changeArtist(int row) |
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{ |
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if (row > 0) { |
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QModelIndex index = model->relationModel(2)->index(row, 1); |
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model->setFilter("artist = '" + index.data().toString() + '\'') ; |
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showArtistProfile(index); |
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} else if (row == 0) { |
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model->setFilter(QString()); |
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showImageLabel(); |
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} else { |
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return; |
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} |
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} |
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void MainWindow::showArtistProfile(QModelIndex index) |
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{ |
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QSqlRecord record = model->relationModel(2)->record(index.row()); |
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QString name = record.value("artist").toString(); |
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QString count = record.value("albumcount").toString(); |
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profileLabel->setText(tr("Artist : %1 \n" \ |
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"Number of Albums: %2").arg(name).arg(count)); |
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profileLabel->show(); |
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iconLabel->show(); |
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titleLabel->hide(); |
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trackList->hide(); |
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imageLabel->hide(); |
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} |
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void MainWindow::showAlbumDetails(QModelIndex index) |
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{ |
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QSqlRecord record = model->record(index.row()); |
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QString artist = record.value("artist").toString(); |
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QString title = record.value("title").toString(); |
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QString year = record.value("year").toString(); |
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QString albumId = record.value("albumid").toString(); |
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showArtistProfile(indexOfArtist(artist)); |
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titleLabel->setText(tr("Title: %1 (%2)").arg(title).arg(year)); |
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titleLabel->show(); |
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QDomNodeList albums = albumData.elementsByTagName("album"); |
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for (int i = 0; i < albums.count(); i++) { |
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QDomNode album = albums.item(i); |
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if (album.toElement().attribute("id") == albumId) { |
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getTrackList(album.toElement()); |
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break; |
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} |
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} |
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if (!trackList->count() == 0) |
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trackList->show(); |
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} |
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void MainWindow::getTrackList(QDomNode album) |
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{ |
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trackList->clear(); |
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QDomNodeList tracks = album.childNodes(); |
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QDomNode track; |
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QString trackNumber; |
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for (int j = 0; j < tracks.count(); j++) { |
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track = tracks.item(j); |
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trackNumber = track.toElement().attribute("number"); |
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QListWidgetItem *item = new QListWidgetItem(trackList); |
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item->setText(trackNumber + ": " + track.toElement().text()); |
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} |
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} |
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void MainWindow::addAlbum() |
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{ |
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Dialog *dialog = new Dialog(model, albumData, file, this); |
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int accepted = dialog->exec(); |
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if (accepted == 1) { |
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int lastRow = model->rowCount() - 1; |
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albumView->selectRow(lastRow); |
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albumView->scrollToBottom(); |
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showAlbumDetails(model->index(lastRow, 0)); |
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} |
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} |
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void MainWindow::deleteAlbum() |
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{ |
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QModelIndexList selection = albumView->selectionModel()->selectedRows(0); |
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if (!selection.empty()) { |
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QModelIndex idIndex = selection.at(0); |
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int id = idIndex.data().toInt(); |
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QString title = idIndex.sibling(idIndex.row(), 1).data().toString(); |
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QString artist = idIndex.sibling(idIndex.row(), 2).data().toString(); |
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QMessageBox::StandardButton button; |
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button = QMessageBox::question(this, tr("Delete Album"), |
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QString(tr("Are you sure you want to " \ |
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"delete '%1' by '%2'?")) |
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.arg(title).arg(artist), |
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QMessageBox::Yes | QMessageBox::No); |
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if (button == QMessageBox::Yes) { |
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removeAlbumFromFile(id); |
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removeAlbumFromDatabase(idIndex); |
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decreaseAlbumCount(indexOfArtist(artist)); |
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showImageLabel(); |
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} |
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} else { |
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QMessageBox::information(this, tr("Delete Album"), |
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tr("Select the album you want to delete.")); |
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} |
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} |
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void MainWindow::removeAlbumFromFile(int id) |
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{ |
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QDomNodeList albums = albumData.elementsByTagName("album"); |
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for (int i = 0; i < albums.count(); i++) { |
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QDomNode node = albums.item(i); |
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if (node.toElement().attribute("id").toInt() == id) { |
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albumData.elementsByTagName("archive").item(0).removeChild(node); |
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break; |
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} |
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} |
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/* |
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The following code is commented out since the example uses an in |
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memory database, i.e., altering the XML file will bring the data |
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out of sync. |
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if (!file->open(QIODevice::WriteOnly)) { |
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return; |
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} else { |
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QTextStream stream(file); |
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albumData.elementsByTagName("archive").item(0).save(stream, 4); |
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file->close(); |
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} |
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*/ |
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} |
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void MainWindow::removeAlbumFromDatabase(QModelIndex index) |
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{ |
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model->removeRow(index.row()); |
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} |
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void MainWindow::decreaseAlbumCount(QModelIndex artistIndex) |
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{ |
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int row = artistIndex.row(); |
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QModelIndex albumCountIndex = artistIndex.sibling(row, 2); |
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int albumCount = albumCountIndex.data().toInt(); |
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QSqlTableModel *artists = model->relationModel(2); |
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if (albumCount == 1) { |
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artists->removeRow(row); |
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showImageLabel(); |
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} else { |
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artists->setData(albumCountIndex, QVariant(albumCount - 1)); |
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} |
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} |
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void MainWindow::readAlbumData() |
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{ |
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if (!file->open(QIODevice::ReadOnly)) |
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return; |
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if (!albumData.setContent(file)) { |
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file->close(); |
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return; |
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} |
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file->close(); |
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} |
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QGroupBox* MainWindow::createArtistGroupBox() |
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{ |
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artistView = new QComboBox; |
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artistView->setModel(model->relationModel(2)); |
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artistView->setModelColumn(1); |
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connect(artistView, SIGNAL(currentIndexChanged(int)), |
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this, SLOT(changeArtist(int))); |
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QGroupBox *box = new QGroupBox(tr("Artist")); |
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QGridLayout *layout = new QGridLayout; |
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layout->addWidget(artistView, 0, 0); |
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box->setLayout(layout); |
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return box; |
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} |
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QGroupBox* MainWindow::createAlbumGroupBox() |
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{ |
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QGroupBox *box = new QGroupBox(tr("Album")); |
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albumView = new QTableView; |
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albumView->setEditTriggers(QAbstractItemView::NoEditTriggers); |
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albumView->setSortingEnabled(true); |
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albumView->setSelectionBehavior(QAbstractItemView::SelectRows); |
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albumView->setSelectionMode(QAbstractItemView::SingleSelection); |
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albumView->setShowGrid(false); |
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albumView->verticalHeader()->hide(); |
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albumView->setAlternatingRowColors(true); |
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albumView->setModel(model); |
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adjustHeader(); |
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QLocale locale = albumView->locale(); |
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locale.setNumberOptions(QLocale::OmitGroupSeparator); |
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albumView->setLocale(locale); |
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connect(albumView, SIGNAL(clicked(QModelIndex)), |
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this, SLOT(showAlbumDetails(QModelIndex))); |
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connect(albumView, SIGNAL(activated(QModelIndex)), |
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this, SLOT(showAlbumDetails(QModelIndex))); |
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QVBoxLayout *layout = new QVBoxLayout; |
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layout->addWidget(albumView, 0, 0); |
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box->setLayout(layout); |
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return box; |
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} |
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QGroupBox* MainWindow::createDetailsGroupBox() |
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{ |
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QGroupBox *box = new QGroupBox(tr("Details")); |
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profileLabel = new QLabel; |
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profileLabel->setWordWrap(true); |
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profileLabel->setAlignment(Qt::AlignBottom); |
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titleLabel = new QLabel; |
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titleLabel->setWordWrap(true); |
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titleLabel->setAlignment(Qt::AlignBottom); |
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iconLabel = new QLabel(); |
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iconLabel->setAlignment(Qt::AlignBottom | Qt::AlignRight); |
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iconLabel->setPixmap(QPixmap(":/images/icon.png")); |
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imageLabel = new QLabel; |
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imageLabel->setWordWrap(true); |
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imageLabel->setAlignment(Qt::AlignCenter); |
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imageLabel->setPixmap(QPixmap(":/images/image.png")); |
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trackList = new QListWidget; |
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QGridLayout *layout = new QGridLayout; |
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layout->addWidget(imageLabel, 0, 0, 3, 2); |
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layout->addWidget(profileLabel, 0, 0); |
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layout->addWidget(iconLabel, 0, 1); |
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layout->addWidget(titleLabel, 1, 0, 1, 2); |
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layout->addWidget(trackList, 2, 0, 1, 2); |
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layout->setRowStretch(2, 1); |
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box->setLayout(layout); |
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return box; |
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} |
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void MainWindow::createMenuBar() |
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{ |
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QAction *addAction = new QAction(tr("&Add album..."), this); |
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QAction *deleteAction = new QAction(tr("&Delete album..."), this); |
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QAction *quitAction = new QAction(tr("&Quit"), this); |
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QAction *aboutAction = new QAction(tr("&About"), this); |
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QAction *aboutQtAction = new QAction(tr("About &Qt"), this); |
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addAction->setShortcut(tr("Ctrl+A")); |
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deleteAction->setShortcut(tr("Ctrl+D")); |
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quitAction->setShortcuts(QKeySequence::Quit); |
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QMenu *fileMenu = menuBar()->addMenu(tr("&File")); |
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fileMenu->addAction(addAction); |
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fileMenu->addAction(deleteAction); |
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fileMenu->addSeparator(); |
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fileMenu->addAction(quitAction); |
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QMenu *helpMenu = menuBar()->addMenu(tr("&Help")); |
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helpMenu->addAction(aboutAction); |
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helpMenu->addAction(aboutQtAction); |
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connect(addAction, SIGNAL(triggered(bool)), this, SLOT(addAlbum())); |
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connect(deleteAction, SIGNAL(triggered(bool)), this, SLOT(deleteAlbum())); |
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connect(quitAction, SIGNAL(triggered(bool)), this, SLOT(close())); |
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connect(aboutAction, SIGNAL(triggered(bool)), this, SLOT(about())); |
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connect(aboutQtAction, SIGNAL(triggered(bool)), qApp, SLOT(aboutQt())); |
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} |
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void MainWindow::showImageLabel() |
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{ |
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profileLabel->hide(); |
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titleLabel->hide(); |
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iconLabel->hide(); |
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trackList->hide(); |
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imageLabel->show(); |
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} |
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QModelIndex MainWindow::indexOfArtist(const QString &artist) |
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{ |
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QSqlTableModel *artistModel = model->relationModel(2); |
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for (int i = 0; i < artistModel->rowCount(); i++) { |
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QSqlRecord record = artistModel->record(i); |
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if (record.value("artist") == artist) |
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return artistModel->index(i, 1); |
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} |
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return QModelIndex(); |
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} |
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void MainWindow::updateHeader(QModelIndex, int, int) |
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{ |
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adjustHeader(); |
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} |
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void MainWindow::adjustHeader() |
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{ |
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albumView->hideColumn(0); |
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albumView->horizontalHeader()->setResizeMode(1, QHeaderView::Stretch); |
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albumView->resizeColumnToContents(2); |
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albumView->resizeColumnToContents(3); |
|
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} |
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void MainWindow::about() |
|
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{ |
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QMessageBox::about(this, tr("About Music Archive"), |
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tr("<p>The <b>Music Archive</b> example shows how to present " |
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"data from different data sources in the same application. " |
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"The album titles, and the corresponding artists and release dates, " |
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425 |
"are kept in a database, while each album's tracks are stored " |
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426 |
"in an XML file. </p><p>The example also shows how to add as " |
|
427 |
"well as remove data from both the database and the " |
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"associated XML file using the API provided by the QtSql and " |
|
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"QtXml modules, respectively.</p>")); |
|
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} |