C++ QContent::type方法代码示例

/*!
    Loads a thumbnail representation of \a content.  The thumbnail will be scaled to \a size
    according to the given aspect ratio mode.
*/
QImage QContentStore::thumbnail(const QContent &content, const QSize &size, Qt::AspectRatioMode mode)
{
    QImage thumbnail;

    QString thumbPath = thumbnailPath(content.fileName());

    QFileInfo thumbInfo(thumbPath);

    if (thumbInfo.exists()) {
        if (thumbInfo.lastModified() > content.lastUpdated())
            thumbnail = readThumbnail(thumbPath, size, mode);
    } else {
        thumbnail = QContentFactory::thumbnail(content, size, mode);
    }

    if (thumbnail.isNull()) {
        if (QIODevice *device = content.open()) {
            QImageReader reader(device);

            if (reader.canRead()) {
                QSize scaledSize = reader.size();

                reader.setQuality(25);
                if (scaledSize.width() > 128 || scaledSize.height() > 128) {
                    scaledSize.scale(QSize(128, 128), Qt::KeepAspectRatio);

                    reader.setQuality( 49 ); // Otherwise Qt smooth scales
                    reader.setScaledSize(scaledSize);
                    reader.read(&thumbnail);

                    if (!thumbnail.isNull()) {
                        QImageWriter writer(thumbPath, QByteArray::fromRawData("PNG", 3));
                        writer.setQuality(25);
                        writer.write(thumbnail);

                        if (size.isValid())
                            thumbnail = thumbnail.scaled(size, mode);
                    }
                } else {
                    if (size.isValid()) {
                        scaledSize.scale(size, mode);
                        reader.setQuality( 49 ); // Otherwise Qt smooth scales
                        reader.setScaledSize(scaledSize);
                    }
                    reader.read(&thumbnail);
                }
            }

            delete device;
        }
    }

    if (thumbnail.isNull() && content.type().startsWith(m_audioPrefix)) {
        QDir dir = QFileInfo(content.fileName()).absoluteDir();

        foreach (const QString &fileName, m_folderThumbnails) {
            if (dir.exists(fileName)) {
                thumbnail = readThumbnail(dir.absoluteFilePath(fileName), size, mode);
                break;
            }
        }
    }

/*!
    Constructs a QMimeType from the \l {QContent::}{type()} of \a lnk.
*/
QMimeType::QMimeType( const QContent& lnk )
{
    init(lnk.type());
}

/*!
    Constructs a new WheelBrowserScreen instance with the given \a parent and
    widget \a flags.
*/
WheelBrowserScreen::WheelBrowserScreen(QWidget *parent, Qt::WFlags flags)
: QAbstractBrowserScreen(parent, flags),
  m_fillAlpha(0), m_hiding(false), m_wheel(0), m_fillTimeline(0)
{
    QPalette pal = palette();
    pal.setColor(QPalette::Window, QColor(100, 100, 100, 0));
    setPalette(pal);

    QVBoxLayout * layout = new QVBoxLayout(this);
    setLayout(layout);

    m_wheel = new QPixmapWheel(this);
    QFont f = font();
    f.setBold(true);
    m_wheel->setFont(f);
    m_wheel->setMaximumVisibleIcons(7);

    QObject::connect(m_wheel, SIGNAL(moveToCompleted()),
                     this, SLOT(moveToCompleted()));
    QObject::connect(m_wheel, SIGNAL(itemSelected(QString)),
                     this, SLOT(clicked(QString)));
    setFocusProxy(m_wheel);

    layout->addStretch(1);
    layout->addWidget(m_wheel, 5);
    layout->addStretch(1);

    m_data = new QPixmapWheelData;

    // Load apps
    QSettings cfg(Qtopia::defaultButtonsFile(), QSettings::IniFormat);
    cfg.beginGroup("Menu"); // No tr
    const int menur = cfg.value("Rows",3).toInt();
    const int menuc = cfg.value("Columns",3).toInt();
    QString menuKeyMap = cfg.value("Map","123456789").toString();

    for (int i = 0; i < menur*menuc; i++) {
        QChar key = menuKeyMap[i];
        QStringList entries = cfg.value(QString(key)).toStringList();

        if(!entries.isEmpty()) {
            QContent *app = readLauncherMenuItem(entries.first());

            if(app) {
                QString file = app->fileName();
                QString name = app->name();
                if(app->type().startsWith("Folder/") )
                    file = app->type();
                QPixmap pix = app->icon().pixmap(QSize(48, 48));
                if(file.isEmpty())
                    file = app->type();

                if(!file.isEmpty() && !name.isEmpty() && !pix.isNull()) {
                    m_data->appendItem(file, pix, name);
                }
                delete app;
            }
        }
    }

    m_fillTimeline = new QTimeLine(2000, this);
    QObject::connect(m_fillTimeline, SIGNAL(valueChanged(qreal)),
                     this, SLOT(timelineStep(qreal)));
}