downloadwidget.cpp Example File

webenginewidgets/simplebrowser/downloadwidget.cpp
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#include "downloadwidget.h" #include <QFileInfo> #include <QUrl> #include <QWebEngineDownloadItem> DownloadWidget::DownloadWidget(QWebEngineDownloadItem *download, QWidget *parent) : QFrame(parent) , m_download(download) , m_timeAdded(QTime::currentTime()) { setupUi(this); m_dstName->setText(QFileInfo(m_download->path()).fileName()); m_srcUrl->setText(m_download->url().toDisplayString()); connect(m_cancelButton, &QPushButton::clicked, [this](bool) { if (m_download->state() == QWebEngineDownloadItem::DownloadInProgress) m_download->cancel(); else emit removeClicked(this); }); connect(m_download, &QWebEngineDownloadItem::downloadProgress, this, &DownloadWidget::updateWidget); connect(m_download, &QWebEngineDownloadItem::stateChanged, this, &DownloadWidget::updateWidget); updateWidget(); } inline QString DownloadWidget::withUnit(qreal bytes) { if (bytes < (1 << 10)) return tr("%L1 B").arg(bytes); else if (bytes < (1 << 20)) return tr("%L1 KiB").arg(bytes / (1 << 10), 0, 'f', 2); else if (bytes < (1 << 30)) return tr("%L1 MiB").arg(bytes / (1 << 20), 0, 'f', 2); else return tr("%L1 GiB").arg(bytes / (1 << 30), 0, 'f', 2); } void DownloadWidget::updateWidget() { qreal totalBytes = m_download->totalBytes(); qreal receivedBytes = m_download->receivedBytes(); qreal bytesPerSecond = receivedBytes / m_timeAdded.elapsed() * 1000; auto state = m_download->state(); switch (state) { case QWebEngineDownloadItem::DownloadRequested: Q_UNREACHABLE(); break; case QWebEngineDownloadItem::DownloadInProgress: if (totalBytes >= 0) { m_progressBar->setValue(qRound(100 * receivedBytes / totalBytes)); m_progressBar->setDisabled(false); m_progressBar->setFormat( tr("%p% - %1 of %2 downloaded - %3/s") .arg(withUnit(receivedBytes)) .arg(withUnit(totalBytes)) .arg(withUnit(bytesPerSecond))); } else { m_progressBar->setValue(0); m_progressBar->setDisabled(false); m_progressBar->setFormat( tr("unknown size - %1 downloaded - %2/s") .arg(withUnit(receivedBytes)) .arg(withUnit(bytesPerSecond))); } break; case QWebEngineDownloadItem::DownloadCompleted: m_progressBar->setValue(100); m_progressBar->setDisabled(true); m_progressBar->setFormat( tr("completed - %1 downloaded - %2/s") .arg(withUnit(receivedBytes)) .arg(withUnit(bytesPerSecond))); break; case QWebEngineDownloadItem::DownloadCancelled: m_progressBar->setValue(0); m_progressBar->setDisabled(true); m_progressBar->setFormat( tr("cancelled - %1 downloaded - %2/s") .arg(withUnit(receivedBytes)) .arg(withUnit(bytesPerSecond))); break; case QWebEngineDownloadItem::DownloadInterrupted: m_progressBar->setValue(0); m_progressBar->setDisabled(true); m_progressBar->setFormat( tr("interrupted: %1") .arg(m_download->interruptReasonString())); break; } if (state == QWebEngineDownloadItem::DownloadInProgress) { static QIcon cancelIcon(QStringLiteral(":process-stop.png")); m_cancelButton->setIcon(cancelIcon); m_cancelButton->setToolTip(tr("Stop downloading")); } else { static QIcon removeIcon(QStringLiteral(":edit-clear.png")); m_cancelButton->setIcon(removeIcon); m_cancelButton->setToolTip(tr("Remove from list")); } }