[SOLVED] Some advice on how to pass a modified role value in the ListView to its listmodel？

open-src

In my qml project, I have created a custom listmodel by subclassing QAbstractListModel, and I use the PictureModel in a ListView. The ListView contains a Textedit element to display the 'comments' role. I am wondering about that when modifying the comments role value, how to pass the value to its model item.
Any advice will be appreciated!

here is the header file:

@class PictureModel : public QAbstractListModel
{
Q_OBJECT

public:
enum Roles{
nameRole = Qt::UserRole + 1,
CommentsRole
};

PictureModel(QObject *parent = 0);
Qt::ItemFlags flags(const QModelIndex &index) const;

void addPicture(const Picture &picture);
int rowCount(const QModelIndex &parent = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role=Qt::DisplayRole) const;

bool setData(const QModelIndex &index, const QVariant &value,
             int role = Qt::EditRole);
bool insertRows(int row, int count, const QModelIndex &parent);
bool removeRows(int row, int count, const QModelIndex &parent);

private:
QList<Picture> m_pictures;
};

@
here is the part of cpp file:

@bool PictureModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
if(index.isValid()&&role == Qt::EditRole){
m_pictures.replace(index.row(), value.value<Picture>());
emit dataChanged(index,index);
return true;
}

return false;

}@

here is the delegate of the ListView object.
@
Component{
id:listdelegate
Rectangle{
id:single
.............................
TextEdit {

        id:edit
        width: parent.width
        text: comments
        font.pointSize: 18
        color: "black"
        opacity: 0
        focus: true
        wrapMode :TextEdit.Wrap
    }

.............................
}
@

apap_

add a Q_INVOKABLE function in your model so that you can call it from qml. I think about something like this :
@
Q_INVOKABLE void editComments(int listIndex, const QVariant &comments)
{
QModelIndex qModelIndex = index(listIndex, 0);
bool result = setData(qModelIndex, comments, CommentsRole);
...
}
@

open-src

I got it, thanks a lot!