Qt使用Poppler-qt5操作PDF文件

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QString> #include <QFileDialog> #include <QPalette> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { QString path = QFileDialog::getOpenFileName(this, tr("打开一个文本"), ".", tr("(*.pdf)")); doc = Poppler::Document::load(path); int index = 0; Poppler::Page* pdfPage = doc->page(index); // Document starts at page 0 if (pdfPage == 0) { // ... error message ... return; } // Generate a QImage of the rendered page QImage image = pdfPage->renderToImage(72,72 , -1, -1, -1, -1); if (image.isNull()) { // ... error message ... return; } QPalette palette; palette.setBrush(this->backgroundRole(),QBrush(image)); this->setPalette(palette); ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; }