How can I remove rows from QComboBox?

[TomNow99]

Hi,

I have subclass of QComboBox, where I set model ( QStandardItemModel ) with QStandardItems.

Now I have a vector with QStandardItems ( his name is items ):

// ( in QComboBox subclass constructor ):

    itemModel = new QStandardItemModel;
    for(auto text: itemsText)
    {
        items.append(new QStandardItem(text));
        items.last()->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
        items.last()->setData(Qt::Unchecked, Qt::CheckStateRole);
        itemModel->setItem(itemModel->rowCount(),0,items.last());
    }
    setModel(itemModel);

Now I setIndexWidget in view() - QPushButtons. So all my items in QComboBox have widgets on it.

// for example:

    QModelIndex index = model()->index(0,0);
    view()->setIndexWidget(index, button);

Next I would like to delete in a proper way item from model and from QComboBox when I clicked on this button and delete that buttons. Now my code is something like:

int row = getItemRow();    <= here I get row, where is that QPushButton, which I clicked
model()->removeRow(row);
showPopup();

And my questions:

1. Need I that QVector with QStandardItems or can I only have items in model?
2. Have I to delete all items in QStandardItemModel or QStandardItemModel deletes items like QVector ( I haven't do anything )
3. model()->removeRow(row) <- really delete row or only change parent like takeAt in QGridLayout?

[mrjj]

Hi
You can get the pushbutton with
https://doc.qt.io/qt-5/qabstractitemview.html#indexWidget

1. The model owns the items and unless you need to keep track of them for other reasons ( like update text)
   i dont think there is any reason to have a list also besides the model.

2. The model owns the items and will delete them so no manually deleting is needed.

3. https://doc.qt.io/qt-5/qstandarditem.html#removeRow
   "The items that were in the row are deleted."

[TomNow99]

@mrjj Thank you :)

Only one more question. How can I add items to model not using vector? Something like that:

    for(auto text: itemsText)
    {
        QStandardItem *tmp = new QStandardItem(text);
        tmp->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
        tmp->setData(Qt::Unchecked, Qt::CheckStateRole);
        itemModel->setItem(itemModel->rowCount(),0,tmp);
    }

EDIT: And one more:

What with QPushButtons in model? Have I delete them?