Populate QML with nested lists from Qt?

[AmanVirdi]

I want to display structure like:

Album A
Track A1
Track A2
Album B
Track B1
Track B2

I have made two classes TrackList and TrackDataModel. The TrackDataModel is having QList of TrackList type.
I am not able to access the Child list i.e. tracklist in QML file. There is no error but tracklist details are not displaying on QML file.
I have written something like follows, am I following right approach?

TrackList.h file looks like:
@
class TrackList: public QObject
{
Q_OBJECT
Q_PROPERTY(qint32 trackid READ trackid WRITE setTrackId NOTIFY trackidChanged)
Q_PROPERTY(qint32 trackno READ trackno WRITE setTrackNo NOTIFY tracknoChanged)
Q_PROPERTY(qint32 duration READ duration WRITE setDuration NOTIFY durationChanged)
Q_PROPERTY(QString tracktitle READ tracktitle WRITE setTrackTitle NOTIFY tracktitleChanged)
public:
TrackList(QObject *parent=0);
TrackList(const qint32 &trackid, const qint32 &trackno, const qint32 &duration, const QString &tracktitle, QObject *parent=0);

qint32 trackid() const;
void setTrackId(const qint32 &trackid);

qint32 trackno() const;
void setTrackNo(const qint32 &trackno);

qint32 duration() const;
void setDuration(const qint32 &duration);

QString tracktitle() const;
void setTrackTitle(const QString &tracktitle);

signals:
void trackidChanged();
void tracknoChanged();
void durationChanged();
void tracktitleChanged();

private:
qint32 m_trackid;
qint32 m_trackno;
qint32 m_duration;
QString m_tracktitle;
};@

TrackDataModel.h file looks like:
@class TrackDataModel: public QObject
{
Q_OBJECT
Q_PROPERTY(qint32 albumid READ albumid WRITE setAlbumId NOTIFY albumidChanged)
Q_PROPERTY(QList<TrackList*> tracklist READ tracklist WRITE setTrackList)

public:
TrackDataModel(QObject *parent=0);
TrackDataModel(const qint32 &albumid, const QList<TrackList *> &tracklist, QObject *parent);

qint32 albumid() const;
void setAlbumId(const qint32 &albumid);

QList<TrackList*> tracklist() const;
void setTrackList(const QList<TrackList*> &tracklist);

signals:
void albumidChanged();

private:
qint32 m_albumid;
QList<TrackList*> m_tracklist;
};
@

main.cpp:

@QMap<int, QObject*> TrackMap;

TrackMap = //data filled by calling function here

viewer->rootContext()->setContextProperty("trackModel", QVariant::fromValue(TrackMap.values()));@

and .qml file is:
@
Rectangle {
Component {
id: trackDelegate

    Item {
        id: parentItem
        width: grid.cellWidth
        height: grid.cellHeight

        Item {
            id: albumsDetail
            width: 200
            anchors.left: parent.left
           
            Text {
                id: txtAlbumId
                text: albumid                                 //TrackDataModel::albumid is being show here correctley
            }
        }
        Item {
            id: tacksDetail
            width: 300
            height: 200
            anchors.left: albumsDetail.right
            anchors.leftMargin: 100
            ListView {
                id: lstTracksDetail
                model: tracklist                           // What should be the model here
                anchors.fill: parent
                delegate: Row {
                    Text {
                        id: txtTrackNo
                        text: trackno                      // how can I access the TrackList elements here
                        width: lstTracksDetail.width/3
                        height: 20
                        font.family: fontFamilyNormal
                        smooth:true
                        clip: true
                    }
                    Text {
                        id: txtTitle
                        text: "tracktitle"                   // how can I access the TrackList elements here
                        width: 100
                        height: 20

                    }
                    Text {
                        id: txtDuration
                        text: "duration"
                        width: 100
                        height: 20
                    }
                }
            }
        }
    }
}

GridView {
    id: grid
    cellWidth: 300
    cellHeight: 200
    model: trackModel                                //TrackDataModel is available here
    snapMode: GridView.SnapToRow
    delegate: trackDelegate
    focus: true
}

}
@

in qml there is no error while running but the track's info is blank. I am not able to access the TrackList in the inner delegate.
Please help me to overcome this issue.

[AmanVirdi]

No one has solution for my problem? Please help me...