C++ QProgressBar::sizeHint方法代码示例

void ArchiveList::fillPartialArchiveItem(PartialArchive *a, QTreeWidgetItem *item)
{
    QTreeWidgetItem *subItem = new QTreeWidgetItem(item);

    QPushButton *pauseButton = new QPushButton();
    pauseButton->setText(a->isDownloading() ? tr("Pause") : tr("Continue"));
    connect(pauseButton, SIGNAL(clicked()), a, SLOT(togglePauseDownload()));
    downloadPausedMapper->setMapping(a, pauseButton);
    downloadStartedMapper->setMapping(a, pauseButton);
    connect(a, SIGNAL(downloadStarted()), downloadStartedMapper, SLOT(map()));
    connect(a, SIGNAL(downloadPaused()), downloadPausedMapper, SLOT(map()));

    int pbarColumn;

    if (compactLayout) {
        pbarColumn = 1;

        subItem->setSizeHint(1, pauseButton->sizeHint());
        setItemWidget(subItem, 1, pauseButton);

        QPushButton *detailsButton = new QPushButton(tr("Details"));
        showDetailsMapper->setMapping(detailsButton, a);
        connect(detailsButton, SIGNAL(clicked()), showDetailsMapper, SLOT(map()));
        subItem->setSizeHint(0, detailsButton->sizeHint());
        setItemWidget(subItem, 0, detailsButton);
    } else {
        pbarColumn = 2;

        item->setSizeHint(3, pauseButton->sizeHint());
        setItemWidget(item, 3, pauseButton);

        item->setText(1, a->getSizeMB());

        QLabel *peerInfo = new QLabel();
        subItem->setSizeHint(1, peerInfo->sizeHint());
        setItemWidget(subItem, 1, peerInfo);
        connect(a, SIGNAL(peerInfoUpdated(QString)), peerInfo, SLOT(setText(QString)));

        QLabel *speedText = new QLabel();
        subItem->setSizeHint(2, speedText->sizeHint());
        setItemWidget(subItem, 2, speedText);
        connect(a, SIGNAL(speedTextUpdated(QString)), speedText, SLOT(setText(QString)));

        QLabel *statusText = new QLabel();
        subItem->setSizeHint(3, statusText->sizeHint());
        setItemWidget(subItem, 3, statusText);
        connect(a, SIGNAL(statusTextUpdated(QString)), statusText, SLOT(setText(QString)));
    }

    QProgressBar *pbar = new QProgressBar();
    pbar->setMinimum(0);
    pbar->setMaximum(100);
    item->setSizeHint(pbarColumn, pbar->sizeHint());
    setItemWidget(item, pbarColumn, pbar);
    connect(a, SIGNAL(progressUpdated(int)), pbar, SLOT(setValue(int)));

    a->emitStatusEvents();
}

void ProgressListDelegate::updateItemWidgets(const QList<QWidget*> widgets,
        const QStyleOptionViewItem &option,
        const QPersistentModelIndex &index) const
{
    if (!index.isValid()) {
        return;
    }

    QPushButton *pauseResumeButton = static_cast<QPushButton*>(widgets[0]);

    QPushButton *cancelButton = static_cast<QPushButton*>(widgets[1]);
    cancelButton->setToolTip(i18n("Cancel"));

    QProgressBar *progressBar = static_cast<QProgressBar*>(widgets[2]);
    QPushButton *clearButton = static_cast<QPushButton*>(widgets[3]);

    int percent = d->getPercent(index);

    cancelButton->setVisible(percent < 100);
    pauseResumeButton->setVisible(percent < 100);
    clearButton->setVisible(percent > 99);

    KJob::Capabilities capabilities = (KJob::Capabilities) index.model()->data(index, JobView::Capabilities).toInt();
    cancelButton->setEnabled(capabilities & KJob::Killable);
    pauseResumeButton->setEnabled(capabilities & KJob::Suspendable);


    JobView::JobState state = (JobView::JobState) index.model()->data(index, JobView::State).toInt();
    switch (state) {
    case JobView::Running:
        pauseResumeButton->setToolTip(i18n("Pause"));
        pauseResumeButton->setIcon(QIcon::fromTheme(QStringLiteral("media-playback-pause")));
        break;
    case JobView::Suspended:
        pauseResumeButton->setToolTip(i18n("Resume"));
        pauseResumeButton->setIcon(QIcon::fromTheme(QStringLiteral("media-playback-start")));
        break;
    default:
        Q_ASSERT(0);
        break;
    }

    QSize progressBarButtonSizeHint;



    if (percent < 100) {
        QSize cancelButtonSizeHint = cancelButton->sizeHint();

        cancelButton->move(option.rect.width() - d->separatorPixels - cancelButtonSizeHint.width(),
                           option.rect.height() - d->separatorPixels - cancelButtonSizeHint.height());

        QSize pauseResumeButtonSizeHint = pauseResumeButton->sizeHint();


        pauseResumeButton->move(option.rect.width() - d->separatorPixels * 2 - pauseResumeButtonSizeHint.width() - cancelButtonSizeHint.width(),
                                option.rect.height() - d->separatorPixels - pauseResumeButtonSizeHint.height());

        progressBarButtonSizeHint = pauseResumeButtonSizeHint;
    } else {
        progressBarButtonSizeHint = clearButton->sizeHint();
        clearButton->resize(progressBarButtonSizeHint);

        clearButton->move(option.rect.width() - d->separatorPixels - progressBarButtonSizeHint.width(),
                          option.rect.height() - d->separatorPixels - progressBarButtonSizeHint.height());
    }
    progressBar->setValue(percent);

    QFontMetrics fm(QApplication::font());
    QSize progressBarSizeHint = progressBar->sizeHint();

    progressBar->resize(QSize(option.rect.width() - d->getCurrentLeftMargin(fm.height()) - d->rightMargin, progressBarSizeHint.height()));

    progressBar->move(d->getCurrentLeftMargin(fm.height()),
                      option.rect.height() - d->separatorPixels * 2 - progressBarButtonSizeHint.height() - progressBarSizeHint.height());
}