C++ (Cpp) QPointer::errorMsg示例

void ModifyPrinter::save()
{
    if (m_changes) {
        QVariantHash args = m_changedValues;
        QString fileName;
        qCDebug(PM_CONFIGURE_PRINTER) << args;
        if (args.contains("ppd-name") &&
            args["ppd-name"].type() == QVariant::Bool) {

            fileName = ui->makeCB->itemData(ui->makeCB->currentIndex(), PPDFile).toString();
            args.remove("ppd-name");
        }
        qCDebug(PM_CONFIGURE_PRINTER) << fileName;

        QPointer<KCupsRequest> request = new KCupsRequest;
        if (m_isClass) {
            request->addOrModifyClass(m_destName, args);
        } else {
            request->addOrModifyPrinter(m_destName, args, fileName);
        }
        request->waitTillFinished();
        if (request) {
            if (!request->hasError()) {
                if (m_changedValues.contains("ppd-name")) {
                    emit ppdChanged();
                }
                request->getPrinterAttributes(m_destName, m_isClass, neededValues());
                request->waitTillFinished();

                if (!request->hasError() && !request->printers().isEmpty()) {
                    KCupsPrinter printer = request->printers().first();
                    setValues(printer);
                }
            } else {
                KMessageBox::detailedSorry(this,
                                           m_isClass ? i18nc("@info", "Failed to configure class") :
                                                       i18nc("@info", "Failed to configure printer"),
                                           request->errorMsg(),
                                           i18nc("@title:window", "Failed"));
            }
            request->deleteLater();
        }
    }
}