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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "printhandler.h"
#include <QPrintDialog>
#include <QPainter>
#include <QPrintPreviewDialog>
#include <QWebEngineView>
PrintHandler::PrintHandler(QObject *parent)
: QObject(parent)
{
m_printer.setResolution(300);
}
void PrintHandler::setView(QWebEngineView *view)
{
Q_ASSERT(!m_view);
m_view = view;
connect(view, &QWebEngineView::printRequested, this, &PrintHandler::printPreview);
connect(view, &QWebEngineView::printFinished, this, &PrintHandler::printFinished);
}
void PrintHandler::print()
{
QPrintDialog dialog(&m_printer, m_view);
if (dialog.exec() != QDialog::Accepted)
return;
printDocument(&m_printer);
}
void PrintHandler::printDocument(QPrinter *printer)
{
m_view->print(printer);
// User input in the print preview dialog while we're waiting on a print task
// can mess up the internal state and cause a crash.
m_waitForResult.exec(QEventLoop::ExcludeUserInputEvents);
}
void PrintHandler::printFinished(bool success)
{
if (!success) {
QPainter painter;
if (painter.begin(&m_printer)) {
QFont font = painter.font();
font.setPixelSize(20);
painter.setFont(font);
painter.drawText(QPointF(10,25),
QStringLiteral("Could not generate print preview."));
painter.end();
}
}
m_waitForResult.quit();
}
void PrintHandler::printPreview()
{
if (!m_view)
return;
if (m_inPrintPreview)
return;
m_inPrintPreview = true;
QPrintPreviewDialog preview(&m_printer, m_view);
connect(&preview, &QPrintPreviewDialog::paintRequested,
this, &PrintHandler::printDocument);
preview.exec();
m_inPrintPreview = false;
}
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