PDF转图片实例源码png

#include "mainwindow.h" #include <QPushButton> #include <QWidget> #include <QVBoxLayout> #include <QHBoxLayout> #include <QLineEdit> #include <QFileDialog> #include <QMessageBox> #include <poppler-qt5.h> #include <QDebug> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , m_btn(new QPushButton("生成")) , m_mainWdg(new QWidget(this)) , m_edtSelect(new QLineEdit()) , m_btnSelect(new QPushButton("选择视频路径")) , m_layoutSelect(new QHBoxLayout()) , m_edtSave(new QLineEdit()) , m_btnSave(new QPushButton("图片保存路径")) , m_layoutSave(new QHBoxLayout()) , m_layoutMain(new QVBoxLayout()) { initUI(); initConnect(); } MainWindow::~MainWindow() { } void MainWindow::slotClickBtn() { QString filenamePath=m_edtSelect->text(); if(filenamePath.isEmpty()){ QMessageBox::information(this,"提示","未选择文件"); return; } if(m_edtSave->text().isEmpty()){ QMessageBox::information(this,"提示","未保存路径"); return; } QFileInfo fileinfo =QFileInfo(filenamePath); QString fileName = fileinfo.fileName(); Poppler::Document* document = Poppler::Document::load(filenamePath); uint now_time = QDateTime::currentDateTime().toTime_t(); for(int i = 0; i < document->numPages();i++){ Poppler::Page* pdfPage = document->page(i); QImage image = pdfPage->renderToImage(600,600); QString strSaveImageFileName = m_edtSave->text() + "/" + QString::number(now_time) + "_" + QString::number(i)+".png"; image.save(strSaveImageFileName); } QMessageBox::information(this,"提示","生成完毕"); } void MainWindow::slotSelectPDF() { QString strFileName = QFileDialog::getOpenFileName(); m_edtSelect->setText(strFileName); } void MainWindow::slotSaveImg() { QString strPath = QFileDialog::getExistingDirectory(); m_edtSave->setText(strPath); } void MainWindow::initUI() { setMinimumWidth(500); setWindowTitle("PDF转图片"); m_edtSelect->setDisabled(true); m_layoutSelect->addWidget(m_edtSelect); m_layoutSelect->addWidget(m_btnSelect); m_layoutSave->addWidget(m_edtSave); m_layoutSave->addWidget(m_btnSave); m_layoutMain->addLayout(m_layoutSelect); m_layoutMain->addLayout(m_layoutSave); m_layoutMain->addWidget(m_btn); m_mainWdg->setLayout(m_layoutMain); setCentralWidget(m_mainWdg); } void MainWindow::initConnect() { connect(m_btn,&QPushButton::clicked,this,&MainWindow::slotClickBtn); connect(m_btnSelect,&QPushButton::clicked,this,&MainWindow::slotSelectPDF); connect(m_btnSave,&QPushButton::clicked,this,&MainWindow::slotSaveImg); }