playlistmodel.cpp Example File

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#include "playlistmodel.h" #include <QFileInfo> #include <QUrl> #include <QMediaPlaylist> PlaylistModel::PlaylistModel(QObject *parent) : QAbstractItemModel(parent) { } PlaylistModel::~PlaylistModel() { } int PlaylistModel::rowCount(const QModelIndex &parent) const { return m_playlist && !parent.isValid() ? m_playlist->mediaCount() : 0; } int PlaylistModel::columnCount(const QModelIndex &parent) const { return !parent.isValid() ? ColumnCount : 0; } QModelIndex PlaylistModel::index(int row, int column, const QModelIndex &parent) const { return m_playlist && !parent.isValid() && row >= 0 && row < m_playlist->mediaCount() && column >= 0 && column < ColumnCount ? createIndex(row, column) : QModelIndex(); } QModelIndex PlaylistModel::parent(const QModelIndex &child) const { Q_UNUSED(child); return QModelIndex(); } QVariant PlaylistModel::data(const QModelIndex &index, int role) const { if (index.isValid() && role == Qt::DisplayRole) { QVariant value = m_data[index]; if (!value.isValid() && index.column() == Title) { QUrl location = m_playlist->media(index.row()).canonicalUrl(); return QFileInfo(location.path()).fileName(); } return value; } return QVariant(); } QMediaPlaylist *PlaylistModel::playlist() const { return; } void PlaylistModel::setPlaylist(QMediaPlaylist *playlist) { if (m_playlist) { disconnect(, &QMediaPlaylist::mediaAboutToBeInserted, this, &PlaylistModel::beginInsertItems); disconnect(, &QMediaPlaylist::mediaInserted, this, &PlaylistModel::endInsertItems); disconnect(, &QMediaPlaylist::mediaAboutToBeRemoved, this, &PlaylistModel::beginRemoveItems); disconnect(, &QMediaPlaylist::mediaRemoved, this, &PlaylistModel::endRemoveItems); disconnect(, &QMediaPlaylist::mediaChanged, this, &PlaylistModel::changeItems); } beginResetModel(); m_playlist.reset(playlist); if (m_playlist) { connect(, &QMediaPlaylist::mediaAboutToBeInserted, this, &PlaylistModel::beginInsertItems); connect(, &QMediaPlaylist::mediaInserted, this, &PlaylistModel::endInsertItems); connect(, &QMediaPlaylist::mediaAboutToBeRemoved, this, &PlaylistModel::beginRemoveItems); connect(, &QMediaPlaylist::mediaRemoved, this, &PlaylistModel::endRemoveItems); connect(, &QMediaPlaylist::mediaChanged, this, &PlaylistModel::changeItems); } endResetModel(); } bool PlaylistModel::setData(const QModelIndex &index, const QVariant &value, int role) { Q_UNUSED(role); m_data[index] = value; emit dataChanged(index, index); return true; } void PlaylistModel::beginInsertItems(int start, int end) { m_data.clear(); beginInsertRows(QModelIndex(), start, end); } void PlaylistModel::endInsertItems() { endInsertRows(); } void PlaylistModel::beginRemoveItems(int start, int end) { m_data.clear(); beginRemoveRows(QModelIndex(), start, end); } void PlaylistModel::endRemoveItems() { endInsertRows(); } void PlaylistModel::changeItems(int start, int end) { m_data.clear(); emit dataChanged(index(start,0), index(end,ColumnCount)); }