QTableView: Checkbox is not editable

AchimTr

Hi,

i´m trying to show a Checkbox in my QTableView ( instead of the value ( 0 / 1 ) of the database ). Therefore i´ve written my own Model, in which i´ve overwritten flags(), setdata() and data():

The Checkbox is shown, but is not editable, nothing happens when i click on the Box. Can you help me here? I dont understand why.

Regards
Achim

Qt::ItemFlags CinemaModel::flags(const QModelIndex &index) const
{
	if (index.column() == 4)
	{
	return  Qt::ItemIsUserCheckable | Qt::ItemIsEnabled;
	}

	return QSqlQueryModel::flags(index);
}


QVariant CinemaModel::data(const QModelIndex & index, int role) const
{
	if( index.column() == 4 && role == Qt::CheckStateRole )
	{
		if (role == Qt::CheckStateRole)
		{
			return index.data(Qt::EditRole).toBool() ? QVariant(Qt::Checked) : QVariant(Qt::Unchecked);
		}		
	}
	return QSqlQueryModel::data(index, role);
}


bool CinemaModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
	if (index.column() == 4)
	{
		QVariant data = value.toInt() == Qt::Checked ? QVariant(true) : QVariant(false);
		return QSqlQueryModel::setData(index, data, Qt::EditRole);
	}
	
	return QSqlQueryModel::setData(index, value, role);	
}

SGaist

Hi and welcome to devnet,

AFAIR, with the set of flags you return, your item will not be editable.

You should rather have something like:

Qt::ItemFlags CinemaModel::flags(const QModelIndex &index) const 
{
    Qt::ItemFlags result = QSqlTableModel::flags(index);
    if (index.column() == 4) {
        result |= Qt::ItemIsUserCheckable;
    }
    return result;
}

Note that QSqlQueryModel is a read-only model so you may have to also add the Qt::ItemIsEditable flag.

AchimTr

THX SGaist for the hint with the read-only model, i didn´t noticed it. Now, i use a QSqlTableModel instead of a QueryModel and it woks, while using the right flags...

Only one problem left...I must doubeblick on the cell with the checkbox, so the checkbox gets the focus. And then i can can check/uncheck it. Do you / anyone know a solution, with which i can change the state with only one click? I´ve tried already to ovveride the mousePressEvent(), but iz didnt worked :/

Regards
Achim