playlistmodel.cpp Example File

multimediawidgets/player/playlistmodel.cpp
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#include "playlistmodel.h" #include <QFileInfo> #include <QUrl> #include <QMediaPlaylist> PlaylistModel::PlaylistModel(QObject *parent) : QAbstractItemModel(parent) , m_playlist(0) { } 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 m_playlist; } void PlaylistModel::setPlaylist(QMediaPlaylist *playlist) { if (m_playlist) { disconnect(m_playlist, SIGNAL(mediaAboutToBeInserted(int,int)), this, SLOT(beginInsertItems(int,int))); disconnect(m_playlist, SIGNAL(mediaInserted(int,int)), this, SLOT(endInsertItems())); disconnect(m_playlist, SIGNAL(mediaAboutToBeRemoved(int,int)), this, SLOT(beginRemoveItems(int,int))); disconnect(m_playlist, SIGNAL(mediaRemoved(int,int)), this, SLOT(endRemoveItems())); disconnect(m_playlist, SIGNAL(mediaChanged(int,int)), this, SLOT(changeItems(int,int))); } beginResetModel(); m_playlist = playlist; if (m_playlist) { connect(m_playlist, SIGNAL(mediaAboutToBeInserted(int,int)), this, SLOT(beginInsertItems(int,int))); connect(m_playlist, SIGNAL(mediaInserted(int,int)), this, SLOT(endInsertItems())); connect(m_playlist, SIGNAL(mediaAboutToBeRemoved(int,int)), this, SLOT(beginRemoveItems(int,int))); connect(m_playlist, SIGNAL(mediaRemoved(int,int)), this, SLOT(endRemoveItems())); connect(m_playlist, SIGNAL(mediaChanged(int,int)), this, SLOT(changeItems(int,int))); } 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)); }