blob: c69a987c5df8e0459264e264d96bc2a3e94b9951 [file] [log] [blame]
#include <QtCore/QDebug>
#include <QtCore/QFile>
#include <QtWidgets/QApplication>
#include <QtGui/QImage>
#include <QtWidgets/QLabel>
#include <QtGui/QMouseEvent>
#include <QtGui/QPainter>
#include <QtGui/QPaintEvent>
#include <QtWidgets/QToolTip>
#include <QtWidgets/QWidget>
#include <poppler-qt6.h>
class PDFDisplay : public QWidget // picture display widget
{
Q_OBJECT
public:
PDFDisplay(std::unique_ptr<Poppler::Document> &&d, bool qpainter, QWidget *parent = nullptr);
~PDFDisplay() override;
void setShowTextRects(bool show);
void display();
protected:
void paintEvent(QPaintEvent *) override;
void keyPressEvent(QKeyEvent *) override;
void mousePressEvent(QMouseEvent *) override;
private:
int m_currentPage;
QImage image;
std::unique_ptr<Poppler::Document> doc;
QString backendString;
bool showTextRects;
std::vector<std::unique_ptr<Poppler::TextBox>> textRects;
};
PDFDisplay::PDFDisplay(std::unique_ptr<Poppler::Document> &&d, bool qpainter, QWidget *parent) : QWidget(parent)
{
showTextRects = false;
doc = std::move(d);
m_currentPage = 0;
if (qpainter) {
backendString = QStringLiteral("QPainter");
doc->setRenderBackend(Poppler::Document::QPainterBackend);
} else {
backendString = QStringLiteral("Splash");
doc->setRenderBackend(Poppler::Document::SplashBackend);
}
doc->setRenderHint(Poppler::Document::Antialiasing, true);
doc->setRenderHint(Poppler::Document::TextAntialiasing, true);
}
void PDFDisplay::setShowTextRects(bool show)
{
showTextRects = show;
}
void PDFDisplay::display()
{
if (doc) {
std::unique_ptr<Poppler::Page> page = doc->page(m_currentPage);
if (page) {
qDebug() << "Displaying page using" << backendString << "backend: " << m_currentPage;
QTime t = QTime::currentTime();
image = page->renderToImage();
qDebug() << "Rendering took" << t.msecsTo(QTime::currentTime()) << "msecs";
if (showTextRects) {
QPainter painter(&image);
painter.setPen(Qt::red);
textRects = page->textList();
for (const std::unique_ptr<Poppler::TextBox> &tb : textRects) {
painter.drawRect(tb->boundingBox());
}
} else {
textRects.clear();
}
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);
}
}
void PDFDisplay::mousePressEvent(QMouseEvent *e)
{
int i = 0;
for (const std::unique_ptr<Poppler::TextBox> &tb : textRects) {
if (tb->boundingBox().contains(e->pos())) {
const QString tt = QStringLiteral("Text: \"%1\"\nIndex in text list: %2").arg(tb->text()).arg(i);
QToolTip::showText(e->globalPosition().toPoint(), tt, this);
break;
}
++i;
}
}
int main(int argc, char **argv)
{
QApplication a(argc, argv); // QApplication required!
if (argc < 2 || (argc == 3 && strcmp(argv[2], "-extract") != 0 && strcmp(argv[2], "-qpainter") != 0 && strcmp(argv[2], "-textRects") != 0) || argc > 3) {
// use argument as file name
qWarning() << "usage: test-poppler-qt6 filename [-extract|-qpainter|-textRects]";
exit(1);
}
std::unique_ptr<Poppler::Document> doc = Poppler::Document::load(QFile::decodeName(argv[1]));
if (!doc) {
qWarning() << "doc not loaded";
exit(1);
}
if (doc->isLocked()) {
qWarning() << "document locked (needs password)";
exit(0);
}
// 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();
qDebug() << " Metadata: " << doc->metadata();
if (doc->hasEmbeddedFiles()) {
qDebug() << "Embedded files:";
foreach (Poppler::EmbeddedFile *file, doc->embeddedFiles()) {
qDebug() << " " << file->name();
}
qDebug();
} else {
qDebug() << "No embedded files";
}
if (doc->numPages() <= 0) {
qDebug() << "Doc has no pages";
return 0;
}
{
std::unique_ptr<Poppler::Page> page = doc->page(0);
if (page) {
qDebug() << "Page 1 size: " << page->pageSize().width() / 72 << "inches x " << page->pageSize().height() / 72 << "inches";
}
}
if (argc == 2 || (argc == 3 && strcmp(argv[2], "-qpainter") == 0) || (argc == 3 && strcmp(argv[2], "-textRects") == 0)) {
bool useQPainter = (argc == 3 && strcmp(argv[2], "-qpainter") == 0);
PDFDisplay test(std::move(doc), useQPainter); // create picture display
test.setWindowTitle(QStringLiteral("Poppler-Qt6 Test"));
test.setShowTextRects(argc == 3 && strcmp(argv[2], "-textRects") == 0);
test.display();
test.show(); // show it
return a.exec(); // start event loop
} else {
std::unique_ptr<Poppler::Page> page = doc->page(0);
QLabel *l = new QLabel(page->text(QRectF()), nullptr);
l->show();
return a.exec();
}
}
#include "test-poppler-qt6.moc"