QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
QTextCodec::setCodecForCStrings(QTextCodec::codecForLocale());
QTextCodec::setCodecForTr(QTextCodec::codecForLocale());

Цитата(alcionov @ 5.5.2010, 15:43)

bool MyWindow::eventFilter(QObject *obj, QEvent *event)
{
    if (event->type() != QEvent::KeyPress) {
        return QObject::eventFilter(obj, event);
    }

    QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);

    switch (keyEvent->key()) {
    case Qt::Key_Return:
    case Qt::Key_Enter:
        if (focusNextChild()) {
            return true;
        }
        return false;
    default:
        return QObject::eventFilter(obj, event);
    }
}

class DoubleSpinBox : public QDoubleSpinBox
{
Q_OBJECT
public:
    explicit DoubleSpinBox(QWidget *parent = 0);
    virtual QString textFromValue(double value) const;
    virtual double valueFromText(const QString &text) const;

protected:
    void keyPressEvent(QKeyEvent *e);
};

DoubleSpinBox::DoubleSpinBox(QWidget *parent) :
    QDoubleSpinBox(parent)
{
}

QString DoubleSpinBox::textFromValue(double value) const
{
    QString text = QString("%L1").arg(value, 0, 'f', decimals());
    return text.replace(QLatin1Char('.'), QLocale().decimalPoint());
}

double DoubleSpinBox::valueFromText(const QString &text) const
{
    return QString(text).replace(QLocale().decimalPoint(), QLatin1Char('.')).toDouble();
}

void DoubleSpinBox::keyPressEvent(QKeyEvent *e)
{
    switch (e->key()) {
    case Qt::Key_Comma:
    case Qt::Key_Period: {
        QKeyEvent *myKeyEvent = new QKeyEvent(QEvent::KeyPress, Qt::Key_Comma,
                                              e->modifiers(), QLocale().decimalPoint());
        QDoubleSpinBox::keyPressEvent(myKeyEvent);
        break;
    }
    default:
        QDoubleSpinBox::keyPressEvent(e);
    }
}

const QString driverName = QString("QODBC");
const QString server = QString("127.0.0.1");
const QString database = QString("Database");
const QString user = QString("User");
const QString pass = QString("Password");
const QString trustedConnection = user.isEmpty() ? QString("yes") : QString("no");

if (!QSqlDatabase::isDriverAvailable(driverName) {
    qDebug() << QString("%1 database driver not found").arg(driverName);
    return;
}

db = QSqlDatabase::addDatabase(driverName);

const QString connectionString = QString("Driver={SQL Native Client};"Server=%1;Database=%2;"
                                         "Uid=%3;Pwd=%4;Trusted_Connection=%5;")
                                 .arg(server, database, user, pass, trustedConnection);

db.setDatabaseName(connectionString);

if (!db.open()) {
    qDebug() << db.lastError().text();
    return;
}