Update qCombobox inside qtableWidget with sqlite data

Isidro Perla

Hi, I have a problem with my current code, I have inserted in qTableWidget a combobox with with setCellWidget method, but I need to update the value in that qComboBox as I do with ui->tW_Datos->setItem(fila, 0, new QTableWidgetItem(consultar.value(2).toByteArray().constData())) for example, how Can I update my combobox with the value from sq|lite??

void Complejidad::MostrarDatos()
{
QString consulta;
consulta.append("SELECT * FROM componentes WHERE Componente='" + buscar + "'");
QSqlQuery consultar;
consultar.prepare(consulta);

if(consultar.exec()){
    qDebug() << "Se ha consultado correctamente";
}else{
    qDebug() << "No se ha consultado correctamente" << consultar.lastError();
}

int fila=0;

ui->tW_Datos->setRowCount(0);

while(consultar.next()){
    QComboBox *combo;
    combo = new QComboBox;
    combo->addItems({"", "Simple", "Media", "Alta"});
    combo->setProperty("row", 1 - ui->tW_Datos->rowCount());
    combo->setProperty("column", 1);

    ui->tW_Datos->insertRow(fila);
    ui->tW_Datos->setItem(fila, 0, new QTableWidgetItem(consultar.value(2).toByteArray().constData()));
    connect(combo, SIGNAL(currentIndexChanged(const QString&)), this, SLOT(OnComboIndexChanged(const QString&)));
    ui->tW_Datos->setCellWidget (fila, 1, combo);
}

}

JonB

@Isidro-Perla
I'm not sure what your issue is here.

You can retrieve the QComboBox created via QTableWidget::setCellWidget(row, column, combo) via combo = qobject_cast<QComboBox*>QTableWidget::cellWidget(row, column). Is that what you are looking for?

Isidro Perla

Well, I have a problem with this line:

combo = qobject_cast<QComboBox*>QTableWidget:cellWidget(row, column);

return this error: assigning to 'QComboBox *' from incompatible type '<overloaded function type>'

How Can I fix that?

JonB

@Isidro-Perla
You must put your variable in place of the QTableWidget in QTableWidget::cellWidget(), so
combo = qobject_cast<QComboBox*>yourTableWidget->cellWidget(row, column);

I see you have ui->tW_Datos->setCellWidget (fila, 1, combo);, you to get it back:
combo = qobject_cast<QComboBox*>ui->tW_Datos->cellWidget(fila, 1);