QT中基于mupdf库实现pdf阅读器

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDialog> #include <QVBoxLayout> #include <QListWidget> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); // 对控件 QListWidget 属性进行设置 /** * 1. 使用Qt Create编写的demo，所以 QListWidget 控件是直接在ui文件拉进入的 * 2. 需要对每个 QListWidgetItem 加10px的间隔，不然翻页计算不准，或者是 px_num+1 也行 */ ui->listWidget->setViewMode(QListView::IconMode); ui->listWidget->setIconSize(QSize(1050, 1485)); // ui->listWidget->resize(2900, 2450); // ui->listWidget->setIconSize(QSize(3000, 2500)); ui->listWidget->setSpacing(10); ui->listWidget->setResizeMode(QListView::Adjust); ui->listWidget->setMovement(QListView::Static); // 显示 PDF fz_context *ctx = fz_new_context(NULL, NULL, FZ_STORE_DEFAULT); fz_register_document_handlers(ctx); // *：这里报错，就需要设置 MTD 或者 MDD fz_document *doc = fz_open_document(ctx, "D:/develop/1000008958680.pdf"); int pageCount = fz_count_pages(ctx, doc); qDebug() << pageCount << endl; float zoom = (float)300 / (float)72; // 设置缩放比例 fz_matrix ctm = fz_scale(zoom, zoom); for(int i = 0; i < pageCount; i++) { fz_pixmap *pix = fz_new_pixmap_from_page_number(ctx, doc, i, ctm, fz_device_rgb(ctx), 0); float b = (float)pix->w / (float)1050; int t_h = pix->h / b; QSize t_size(1050, t_h); QImage img(pix->samples, pix->w, pix->h, pix->stride, QImage::Format_RGB888); img = img.scaled(1050, t_h); QListWidgetItem *tempImageItem = new QListWidgetItem; tempImageItem->setIcon(QIcon(QPixmap::fromImage(img))); tempImageItem->setSizeHint(t_size); ui->listWidget->addItem(tempImageItem); fz_drop_pixmap(ctx, pix); } fz_drop_document(ctx, doc); fz_drop_context(ctx); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_clicked() { // Form *form = new Form; // form->show(); QDialog *dialog = new QDialog(this); QVBoxLayout *layout = new QVBoxLayout(dialog); QListWidget *list =new QListWidget(dialog); dialog->resize(1280,1090); dialog->setWindowTitle(tr("PDF阅读器")); list->setViewMode(QListView::IconMode); // list->setIconSize(QSize(1050, 1485)); list->setIconSize(QSize(1600, 2100)); // ui->listWidget->resize(2900, 2450); // ui->listWidget->setIconSize(QSize(3000, 2500)); list->setSpacing(10); list->setResizeMode(QListView::Adjust); list->setMovement(QListView::Static); // 显示 PDF fz_context *ctx = fz_new_context(NULL, NULL, FZ_STORE_DEFAULT); fz_register_document_handlers(ctx); // *：这里报错，就需要设置 MTD 或者 MDD fz_document *doc = fz_open_document(ctx, "D:/develop/1000008958680.pdf"); int pageCount = fz_count_pages(ctx, doc); qDebug() << pageCount << endl; float zoom = (float)300 / (float)72; // 设置缩放比例 fz_matrix ctm = fz_scale(zoom, zoom); for(int i = 0; i < pageCount; i++) { fz_pixmap *pix = fz_new_pixmap_from_page_number(ctx, doc, i, ctm, fz_device_rgb(ctx), 0); float b = (float)pix->w / (float)1050; int t_h = pix->h / b; QSize t_size(1050, t_h); QImage img(pix->samples, pix->w, pix->h, pix->stride, QImage::Format_RGB888); img = img.scaled(1050, t_h); QListWidgetItem *tempImageItem = new QListWidgetItem; tempImageItem->setIcon(QIcon(QPixmap::fromImage(img))); tempImageItem->setSizeHint(t_size); list->addItem(tempImageItem); fz_drop_pixmap(ctx, pix); } fz_drop_document(ctx, doc); fz_drop_context(ctx); // // 上一页 // int page_num = getShowPageIndex(); // if(page_num > 0) // ui->listWidget->setCurrentRow(page_num-1, QItemSelectionModel::Current); // // 下一页 // int page_num2 = getShowPageIndex(); // int page_count = ui->listWidget->count(); // if(page_num2 < page_count-1) // ui->listWidget->setCurrentRow(page_num+1, QItemSelectionModel::Current); layout->addWidget(list); dialog->show(); } //// 获取当前是哪一页 //int MainWindow::getShowPageIndex() //{ // // image_height 是 1485，在最开始设置 QListWidget 时就有用到 //// int px_num = ui->listWidget->verticalScrollBar().value(); //// double page_num = ceil(px_num / image_height); // double page_num = 1.0; // return page_num; //}