Send data from a model to a delegate - c++

Question

I have a tableView that has a column that is using a comboBox. I need to fill the comboBox using the delegate class with the data from the model class. I was using signals and slots for this task but I know there is a method using data.
This is how i create and fill the comboBox. I need to get the file row directly from the model class without already storing it in the delegate.
QWidget *CDelegate :: createEditor(QWidget *parent, const QStyleOptionViewItem &/* option */, const QModelIndex & index) const
{
if(index.column() == COL_ComboBox)
{
QComboBox *editor = new QComboBox(parent);
for(int i=0; i<file.at(index.row()).size(); i++)
editor -> addItem(file.at(index.row()).at(i))
return editor;
}
...
}

Answer 1

As I understand, you want to fill QComboBox with data from model of your QTableView. As you see, const QModelIndex & index parameter in createEditor function provides you access to this model. Look for method model of QModelIndex class. Thats' why, your createEditor function may be like this:
QWidget *CDelegate :: createEditor(QWidget *parent, const QStyleOptionViewItem &/* option */, const QModelIndex & index) const
{
if(index.column() == COL_ComboBox)
{
QComboBox *editor = new QComboBox(parent);
const QAbstractItemModel *model = index.model();
while(/*condition*/)
{
// take data from model
// QVariant dt = model->data(...);
// fill editor with data from dt
// editor->addItem(...)
}
return editor;
}
...
}