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| |
| #include "printhandler.h" |
| #include <QEventLoop> |
| #include <QPrintDialog> |
| #include <QPrinter> |
| #include <QPainter> |
| #include <QPrintPreviewDialog> |
| #include <QWebEnginePage> |
| |
| PrintHandler::PrintHandler(QObject *parent) |
| : QObject(parent) |
| { |
| |
| } |
| |
| void PrintHandler::setPage(QWebEnginePage *page) |
| { |
| Q_ASSERT(!m_page); |
| m_page = page; |
| connect(m_page, &QWebEnginePage::printRequested, this, &PrintHandler::printPreview); |
| } |
| |
| void PrintHandler::print() |
| { |
| QPrinter printer(QPrinter::HighResolution); |
| QPrintDialog dialog(&printer, m_page->view()); |
| if (dialog.exec() != QDialog::Accepted) |
| return; |
| printDocument(&printer); |
| } |
| |
| void PrintHandler::printDocument(QPrinter *printer) |
| { |
| QEventLoop loop; |
| bool result; |
| auto printPreview = [&](bool success) { result = success; loop.quit(); }; |
| m_page->print(printer, std::move(printPreview)); |
| loop.exec(); |
| if (!result) { |
| QPainter painter; |
| if (painter.begin(printer)) { |
| QFont font = painter.font(); |
| font.setPixelSize(20); |
| painter.setFont(font); |
| painter.drawText(QPointF(10,25), |
| QStringLiteral("Could not generate print preview.")); |
| |
| painter.end(); |
| } |
| } |
| } |
| |
| void PrintHandler::printPreview() |
| { |
| if (!m_page) |
| return; |
| if (m_inPrintPreview) |
| return; |
| m_inPrintPreview = true; |
| QPrinter printer; |
| QPrintPreviewDialog preview(&printer, m_page->view()); |
| connect(&preview, &QPrintPreviewDialog::paintRequested, |
| this, &PrintHandler::printDocument); |
| preview.exec(); |
| m_inPrintPreview = false; |
| } |