savepagedialog.cpp Example File

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  #include "savepagedialog.h"
  #include "ui_savepagedialog.h"

  #include <QtCore/QDir>
  #include <QtWidgets/QFileDialog>

  const QWebEngineDownloadItem::SavePageFormat SavePageDialog::m_indexToFormatTable[] = {
      QWebEngineDownloadItem::SingleHtmlSaveFormat,
      QWebEngineDownloadItem::CompleteHtmlSaveFormat,
      QWebEngineDownloadItem::MimeHtmlSaveFormat
  };

  SavePageDialog::SavePageDialog(QWidget *parent, QWebEngineDownloadItem::SavePageFormat format,
                                 const QString &filePath)
      : QDialog(parent)
      , ui(new Ui::SavePageDialog)
  {
      ui->setupUi(this);
      ui->formatComboBox->setCurrentIndex(formatToIndex(format));
      setFilePath(filePath);
  }

  SavePageDialog::~SavePageDialog()
  {
      delete ui;
  }

  QWebEngineDownloadItem::SavePageFormat SavePageDialog::pageFormat() const
  {
      return indexToFormat(ui->formatComboBox->currentIndex());
  }

  QString SavePageDialog::filePath() const
  {
      return QDir::fromNativeSeparators(ui->filePathLineEdit->text());
  }

  void SavePageDialog::on_chooseFilePathButton_clicked()
  {
      QFileInfo fi(filePath());
      QFileDialog dlg(this, tr("Save Page As"), fi.absolutePath());
      dlg.setAcceptMode(QFileDialog::AcceptSave);
      dlg.setDefaultSuffix(suffixOfFormat(pageFormat()));
      dlg.selectFile(fi.absoluteFilePath());
      if (dlg.exec() != QDialog::Accepted)
          return;
      setFilePath(dlg.selectedFiles().first());
      ensureFileSuffix(pageFormat());
  }

  void SavePageDialog::on_formatComboBox_currentIndexChanged(int idx)
  {
      ensureFileSuffix(indexToFormat(idx));
  }

  int SavePageDialog::formatToIndex(QWebEngineDownloadItem::SavePageFormat format)
  {
      for (auto i : m_indexToFormatTable) {
          if (m_indexToFormatTable[i] == format)
              return i;
      }
      Q_UNREACHABLE();
  }

  QWebEngineDownloadItem::SavePageFormat SavePageDialog::indexToFormat(int idx)
  {
      Q_ASSERT(idx >= 0 && size_t(idx) < (sizeof(m_indexToFormatTable)
                                          / sizeof(QWebEngineDownloadItem::SavePageFormat)));
      return m_indexToFormatTable[idx];
  }

  QString SavePageDialog::suffixOfFormat(QWebEngineDownloadItem::SavePageFormat format)
  {
      if (format == QWebEngineDownloadItem::MimeHtmlSaveFormat)
          return QStringLiteral(".mhtml");
      return QStringLiteral(".html");
  }

  void SavePageDialog::setFilePath(const QString &filePath)
  {
      ui->filePathLineEdit->setText(QDir::toNativeSeparators(filePath));
  }

  void SavePageDialog::ensureFileSuffix(QWebEngineDownloadItem::SavePageFormat format)
  {
      QFileInfo fi(filePath());
      setFilePath(fi.absolutePath() + QLatin1Char('/') + fi.completeBaseName()
                  + suffixOfFormat(format));
  }