Mapping.. ComboCheckBox using QDataWidgetMapper to SQLite

[stanislavf]

Application created in Qt Creator uses combo check boxes. ComboCheckBox has uncheckable title item and checkable items:

-- Choose position

[ ] option1

[ ] option2

...

It is constructed by the following approach:

// Model construction.
QStandardItem* title = new QStandardItem(injuries.at(0));
model.insertRow(0, title);
 
for (int i = 1; i < injuries.length(); i++)
{
    QStandardItem* item = new QStandardItem(injuries.at(i));
 
    item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
    item->setData(Qt::Unchecked, Qt::CheckStateRole);
 
    model.insertRow(i, item);
}
 
// Setting model for combo chech box.
comboCheckBox->setModel(&model);

// Model construction.
QStandardItem* title = new QStandardItem(injuries.at(0));
model.insertRow(0, title);

for (int i = 1; i < injuries.length(); i++)
{
    QStandardItem* item = new QStandardItem(injuries.at(i));

    item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
    item->setData(Qt::Unchecked, Qt::CheckStateRole);

    model.insertRow(i, item);
}

// Setting model for combo chech box.
comboCheckBox->setModel(&model);

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I'm trying to map data from SQLite to this combo check box by this way:

mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new QSqlRelationalDelegate(this));
mapper->addMapping(comboCheckBox, model->fieldIndex("inj1"), "currentIndex");

mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new QSqlRelationalDelegate(this));
mapper->addMapping(comboCheckBox, model->fieldIndex("inj1"), "currentIndex");

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But to no avail. The same mapper works fine with usual check boxes:

mapper->addMapping(checkBox, model->fieldIndex("inj1"), "currentIndex");

mapper->addMapping(checkBox, model->fieldIndex("inj1"), "currentIndex");

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Is any way to map checkable flags from so kind of combo check box to the row of smth of the SQLite data base?

I have failed to map even the current index not to mention separate checkable fields. Your elegant solutions would be just by the way for not very fancy combo check box.

[wysota]

You need a custom delegate that will convert model data to editor data (QAbstractItemDelegate::setEditorData) according to your needs. Of course you'll also need a mapping the other way round (QAbstractItemDelegate::setModelData).

[anda_skoa]

What is a combo check box?

Cheers,
_

[stanislavf]

Thank you, wysota.

But why do the following delegate doesn't work just for changing index:

mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new QSqlRelationalDelegate(this));
mapper->addMapping(comboCheckBox, model->fieldIndex("inj1"), "currentIndex");

mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->setItemDelegate(new QSqlRelationalDelegate(this));
mapper->addMapping(comboCheckBox, model->fieldIndex("inj1"), "currentIndex");

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What is the use of manual delegate?
My editor (a la combo check box has the model already). To which another model I should delegate it?

What is a combo check box?

It is a combo box with checkable items expect the title (first item).

[anda_skoa]

It is a combo box with checkable items expect the title (first item).

Since that appears to be a custom class, does it have a writable "currentIndex" property?

Cheers,
_