445 lines
14 KiB
C++
445 lines
14 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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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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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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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 <QtWidgets>
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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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connect(model, &QSqlRelationalTableModel::rowsInserted,
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this, &MainWindow::updateHeader);
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connect(model, &QSqlRelationalTableModel::rowsRemoved,
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this, &MainWindow::updateHeader);
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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 i = 0; i < tracks.count(); ++i) {
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track = tracks.item(i);
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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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tr("Are you sure you want to "
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"delete '%1' by '%2'?")
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.arg(title, 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, QOverload<int>::of(&QComboBox::currentIndexChanged),
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this, &MainWindow::changeArtist);
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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, &QTableView::clicked,
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this, &MainWindow::showAlbumDetails);
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connect(albumView, &QTableView::activated,
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this, &MainWindow::showAlbumDetails);
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QVBoxLayout *layout = new QVBoxLayout;
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layout->addWidget(albumView, 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);
|
||
|
|
helpMenu->addAction(aboutQtAction);
|
||
|
|
|
||
|
|
connect(addAction, &QAction::triggered,
|
||
|
|
this, &MainWindow::addAlbum);
|
||
|
|
connect(deleteAction, &QAction::triggered,
|
||
|
|
this, &MainWindow::deleteAlbum);
|
||
|
|
connect(quitAction, &QAction::triggered,
|
||
|
|
this, &MainWindow::close);
|
||
|
|
connect(aboutAction, &QAction::triggered,
|
||
|
|
this, &MainWindow::about);
|
||
|
|
connect(aboutQtAction, &QAction::triggered,
|
||
|
|
qApp, &QApplication::aboutQt);
|
||
|
|
}
|
||
|
|
|
||
|
|
void MainWindow::showImageLabel()
|
||
|
|
{
|
||
|
|
profileLabel->hide();
|
||
|
|
titleLabel->hide();
|
||
|
|
iconLabel->hide();
|
||
|
|
trackList->hide();
|
||
|
|
|
||
|
|
imageLabel->show();
|
||
|
|
}
|
||
|
|
|
||
|
|
QModelIndex MainWindow::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();
|
||
|
|
}
|
||
|
|
|
||
|
|
void MainWindow::updateHeader(QModelIndex, int, int)
|
||
|
|
{
|
||
|
|
adjustHeader();
|
||
|
|
}
|
||
|
|
|
||
|
|
void MainWindow::adjustHeader()
|
||
|
|
{
|
||
|
|
albumView->hideColumn(0);
|
||
|
|
albumView->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);
|
||
|
|
albumView->resizeColumnToContents(2);
|
||
|
|
albumView->resizeColumnToContents(3);
|
||
|
|
}
|
||
|
|
|
||
|
|
void MainWindow::about()
|
||
|
|
{
|
||
|
|
QMessageBox::about(this, tr("About Music Archive"),
|
||
|
|
tr("<p>The <b>Music Archive</b> example shows how to present "
|
||
|
|
"data from different data sources in the same application. "
|
||
|
|
"The album titles, and the corresponding artists and release dates, "
|
||
|
|
"are kept in a database, while each album's tracks are stored "
|
||
|
|
"in an XML file. </p><p>The example also shows how to add as "
|
||
|
|
"well as remove data from both the database and the "
|
||
|
|
"associated XML file using the API provided by the Qt SQL and "
|
||
|
|
"Qt XML modules, respectively.</p>"));
|
||
|
|
}
|