C++ QDialog::setParent方法代码示例

int main(int argc,char *argv[])
{
    if (argc < 1)
        return 1;
    const QString skinFile = QString::fromUtf8(argv[1]);
    QApplication app(argc,argv);
    QMainWindow mw;

    DeviceSkinParameters params;
    QString errorMessage;
    if (!params.read(skinFile, DeviceSkinParameters::ReadAll, &errorMessage)) {
	qWarning() << errorMessage;
	return 1;
    }
    DeviceSkin ds(params, &mw);
    // View Dialog
    QDialog *dialog = new QDialog();
    QHBoxLayout *dialogLayout = new QHBoxLayout();
    dialog->setLayout(dialogLayout);
    QDialogButtonBox *dialogButtonBox = new QDialogButtonBox(QDialogButtonBox::Ok|QDialogButtonBox::Cancel);
    QObject::connect(dialogButtonBox, SIGNAL(rejected()), dialog, SLOT(reject()));
    QObject::connect(dialogButtonBox, SIGNAL(accepted()), dialog, SLOT(accept()));
    dialogLayout->addWidget(dialogButtonBox);
    dialog->setFixedSize(params.screenSize());
    dialog->setParent(&ds, Qt::SubWindow);
    dialog->setAutoFillBackground(true);
    ds.setView(dialog);

    QObject::connect(&ds, SIGNAL(popupMenu()), &mw, SLOT(close()));
    QObject::connect(&ds, SIGNAL(skinKeyPressEvent(int,QString,bool)), &mw, SLOT(close()));
    mw.show();
    return app.exec();
}

bool Port::openStreams(QString fileName, bool append, QString &error)
{
    bool ret = false; 
    QDialog *optDialog;
    QProgressDialog progress("Opening Streams", "Cancel", 0, 0, mainWindow);
    OstProto::StreamConfigList streams;
    AbstractFileFormat *fmt = AbstractFileFormat::fileFormatFromFile(fileName);

    if (fmt == NULL)
        goto _fail;

    if ((optDialog = fmt->openOptionsDialog()))
    {
        int ret;
        optDialog->setParent(mainWindow, Qt::Dialog);
        ret = optDialog->exec();
        optDialog->setParent(0, Qt::Dialog);
        if (ret == QDialog::Rejected)
            goto _user_opt_cancel;
    }

    progress.setAutoReset(false);
    progress.setAutoClose(false);
    progress.setMinimumDuration(0);
    progress.show();

    mainWindow->setDisabled(true);
    progress.setEnabled(true); // to override the mainWindow disable

    connect(fmt, SIGNAL(status(QString)),&progress,SLOT(setLabelText(QString)));
    connect(fmt, SIGNAL(target(int)), &progress, SLOT(setMaximum(int)));
    connect(fmt, SIGNAL(progress(int)), &progress, SLOT(setValue(int)));
    connect(&progress, SIGNAL(canceled()), fmt, SLOT(cancel()));

    fmt->openStreamsOffline(fileName, streams, error);
    qDebug("after open offline");

    while (!fmt->isFinished())
        qApp->processEvents();
    qDebug("wait over for offline operation");

    if (!fmt->result())
        goto _fail;
    
    // process any remaining events posted from the thread
    for (int i = 0; i < 10; i++)
        qApp->processEvents();

    if (!append)
    {
        int n = numStreams();

        progress.setLabelText("Deleting existing streams...");
        progress.setRange(0, n);
        for (int i = 0; i < n; i++)
        {
            if (progress.wasCanceled())
                goto _user_cancel;
            deleteStreamAt(0);
            progress.setValue(i);
            if (i % 32 == 0)
                qApp->processEvents();
        }
    }

    progress.setLabelText("Constructing new streams...");
    progress.setRange(0, streams.stream_size());
    for (int i = 0; i < streams.stream_size(); i++)
    {
        if (progress.wasCanceled())
            goto _user_cancel;
        newStreamAt(mStreams.size(), &streams.stream(i));
        progress.setValue(i);
        if (i % 32 == 0)
            qApp->processEvents();
    }

_user_cancel:
    emit streamListChanged(mPortGroupId, mPortId);
_user_opt_cancel:
    ret = true;

_fail:
    progress.close();
    mainWindow->setEnabled(true);
    recalculateAverageRates();
    return ret;
}

//! Returns true on success (or user cancel) and false on failure
bool MainWindow::openSession(QString fileName, QString &error)
{
    bool ret = false;
    QDialog *optDialog;
    QProgressDialog progress("Opening Session", "Cancel", 0, 0, this);
    OstProto::SessionContent session;
    SessionFileFormat *fmt = SessionFileFormat::fileFormatFromFile(fileName);

    if (fmt == NULL) {
        error = tr("Unknown session file format");
        goto _fail;
    }

    if ((optDialog = fmt->openOptionsDialog()))
    {
        int ret;
        optDialog->setParent(this, Qt::Dialog);
        ret = optDialog->exec();
        optDialog->setParent(0, Qt::Dialog);
        if (ret == QDialog::Rejected)
            goto _user_opt_cancel;
    }

    progress.setAutoReset(false);
    progress.setAutoClose(false);
    progress.setMinimumDuration(0);
    progress.show();

    setDisabled(true);
    progress.setEnabled(true); // to override the mainWindow disable

    connect(fmt, SIGNAL(status(QString)),&progress,SLOT(setLabelText(QString)));
    connect(fmt, SIGNAL(target(int)), &progress, SLOT(setMaximum(int)));
    connect(fmt, SIGNAL(progress(int)), &progress, SLOT(setValue(int)));
    connect(&progress, SIGNAL(canceled()), fmt, SLOT(cancel()));

    fmt->openAsync(fileName, session, error);
    qDebug("after open async");

    while (!fmt->isFinished())
        qApp->processEvents();
    qDebug("wait over for async operation");

    if (!fmt->result())
        goto _fail;

    // process any remaining events posted from the thread
    for (int i = 0; i < 10; i++)
        qApp->processEvents();

    // XXX: user can't cancel operation from here on!
    progress.close();

    portsWindow->openSession(&session, error);

_user_opt_cancel:
    ret = true;

_fail:
    progress.close();
    setEnabled(true);
    return ret;
}