examples/player/playlistmodel.cpp
changeset 0 876b1a06bc25
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/player/playlistmodel.cpp	Wed Aug 25 15:49:42 2010 +0300
@@ -0,0 +1,159 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "playlistmodel.h"
+
+#include <QtCore/qfileinfo.h>
+#include <QtCore/qurl.h>
+
+#include <qmediaplaylist.h>
+
+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)));
+    }
+
+    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)));
+    }
+
+
+    reset();
+}
+
+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));
+}
+
+