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#include <QtCore/QDebug>
#include <QtWidgets/QApplication>
#include <QtGui/QImage>
#include <QtGui/QPainter>
#include <QtGui/QPaintEvent>
#include <QtWidgets/QWidget>
#include <poppler-qt6.h>
class PDFDisplay : public QWidget // picture display widget
{
Q_OBJECT
public:
explicit PDFDisplay(std::unique_ptr<Poppler::Document> &&d, QWidget *parent = nullptr);
~PDFDisplay() override;
protected:
void paintEvent(QPaintEvent *) override;
void keyPressEvent(QKeyEvent *) override;
private:
void display();
int m_currentPage;
QImage image;
std::unique_ptr<Poppler::Document> doc;
};
PDFDisplay::PDFDisplay(std::unique_ptr<Poppler::Document> &&d, QWidget *parent) : QWidget(parent)
{
doc = std::move(d);
m_currentPage = 0;
display();
}
void PDFDisplay::display()
{
if (doc) {
std::unique_ptr<Poppler::Page> page = doc->page(m_currentPage);
if (page) {
qDebug() << "Displaying page: " << m_currentPage;
image = page->renderToImage();
update();
}
} else {
qWarning() << "doc not loaded";
}
}
PDFDisplay::~PDFDisplay() { }
void PDFDisplay::paintEvent(QPaintEvent *e)
{
QPainter paint(this); // paint widget
if (!image.isNull()) {
paint.drawImage(0, 0, image);
} else {
qWarning() << "null image";
}
}
void PDFDisplay::keyPressEvent(QKeyEvent *e)
{
if (e->key() == Qt::Key_Down) {
if (m_currentPage + 1 < doc->numPages()) {
m_currentPage++;
display();
}
} else if (e->key() == Qt::Key_Up) {
if (m_currentPage > 0) {
m_currentPage--;
display();
}
} else if (e->key() == Qt::Key_Q) {
exit(0);
}
}
int main(int argc, char **argv)
{
QApplication a(argc, argv); // QApplication required!
if (argc != 3) {
qWarning() << "usage: test-password-qt6 owner-password filename";
exit(1);
}
std::unique_ptr<Poppler::Document> doc = Poppler::Document::load(argv[2], argv[1]);
if (!doc) {
qWarning() << "doc not loaded";
exit(1);
}
// output some meta-data
auto pdfVersion = doc->getPdfVersion();
qDebug() << " PDF Version: " << qPrintable(QStringLiteral("%1.%2").arg(pdfVersion.major).arg(pdfVersion.minor));
qDebug() << " Title: " << doc->info(QStringLiteral("Title"));
qDebug() << " Subject: " << doc->info(QStringLiteral("Subject"));
qDebug() << " Author: " << doc->info(QStringLiteral("Author"));
qDebug() << " Key words: " << doc->info(QStringLiteral("Keywords"));
qDebug() << " Creator: " << doc->info(QStringLiteral("Creator"));
qDebug() << " Producer: " << doc->info(QStringLiteral("Producer"));
qDebug() << " Date created: " << doc->date(QStringLiteral("CreationDate")).toString();
qDebug() << " Date modified: " << doc->date(QStringLiteral("ModDate")).toString();
qDebug() << "Number of pages: " << doc->numPages();
qDebug() << " Linearised: " << doc->isLinearized();
qDebug() << " Encrypted: " << doc->isEncrypted();
qDebug() << " OK to print: " << doc->okToPrint();
qDebug() << " OK to copy: " << doc->okToCopy();
qDebug() << " OK to change: " << doc->okToChange();
qDebug() << "OK to add notes: " << doc->okToAddNotes();
qDebug() << " Page mode: " << doc->pageMode();
QStringList fontNameList;
foreach (const Poppler::FontInfo &font, doc->fonts())
fontNameList += font.name();
qDebug() << " Fonts: " << fontNameList.join(QStringLiteral(", "));
std::unique_ptr<Poppler::Page> page = doc->page(0);
qDebug() << " Page 1 size: " << page->pageSize().width() / 72 << "inches x " << page->pageSize().height() / 72 << "inches";
PDFDisplay test(std::move(doc)); // create picture display
test.setWindowTitle(QStringLiteral("Poppler-Qt6 Test"));
test.show(); // show it
return a.exec(); // start event loop
}
#include "test-password-qt6.moc"
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