pyqt5+QWebEngineView+pdfjs+win32print实现pdf文件的预览、打印

一、pdf显示逻辑

import sys
from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets

PDFJS ='file:///pdfjs-1.9.426-dist/web/viewer.html'# PDFJS = 'file:///usr/share/pdf.js/web/viewer.html'
PDF ='file:///D:/Code/report.pdf'classWindow(QtWebEngineWidgets.QWebEngineView):def__init__(self):super().__init__()print('%s?file=%s'%(PDFJS, PDF))
        self.load(QtCore.QUrl.fromUserInput('%s?file=%s'%(PDFJS, PDF)))if __name__ =='__main__':

    app = QtWidgets.QApplication(sys.argv)
    window = Window()
    window.setGeometry(600,50,800,600)
    window.show()
    sys.exit(app.exec_())

必要条件： 下载PDFJS1.9.426（版本太高可能不支持pyqt5显示），调用web文件夹下的

view.html

文件。
注意:

view.html

和

.pdf

文件的路径前需要加上

file:///

字符串，不然无法显示。原理可能涉及到前端技术，不过可以解释的是，当你用浏览器打开本地pdf文件时，路径前的确加了

file:///

。之前一直不知道是什么东西没有加一直显示不出来，无意间看到浏览器下本地pdf的路径豁然开朗。

二、完整代码

主界面

from PyQt5.QtCore import*from PyQt5.QtWidgets import*from pdfui import Ui_Form
import sys
import time
from tools import print_interface

import os
Pdf_path =''classui_main(QMainWindow, Ui_Form):def__init__(self):super(ui_main, self).__init__()
        self.setupUi(self)

        self.pdf_view_btn.clicked.connect(self.show_report)#查看报表
        self.print_report_btn.clicked.connect(self.printpdf)#打印报表

        self.PDFJS ='file:///pdfjs-1.9.426-dist/web/viewer.html'#已将不可用按钮设置为无法点击 button的disable属性defprintpdf(self):if Pdf_path =='':passelse:
            printobject = print_interface.BridgeClass(Pdf_path)
            printobject.print_pdf()defshow_report(self):
        self.name, _ = QFileDialog.getOpenFileName(self,'Open File','./report_pdf','Image files (*.pdf)')print(self.name)
        self.load_pdf_in_qwebengineview(self.name)defload_pdf_in_qwebengineview(self,pdf_path):global Pdf_path
        Pdf_path = pdf_path

        if pdf_path:
            file_path ='file:///'+pdf_path
            self.webEngineView.load(QUrl.fromUserInput('%s?file=%s'%(self.PDFJS, file_path)))defshowMessage(self, message):
        result = QMessageBox.question(self,'提示', message, QMessageBox.Ok)if __name__ =='__main__':
    app = QApplication(sys.argv)
    window = ui_main()
    window.show()
    sys.exit(app.exec_())

UI

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'pdfui.ui'## Created by: PyQt5 UI code generator 5.15.9## WARNING: Any manual changes made to this file will be lost when pyuic5 is# run again.  Do not edit this file unless you know what you are doing.from PyQt5 import QtCore, QtGui, QtWidgets

classUi_Form(object):defsetupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(851,703)
        self.pdf_view_btn = QtWidgets.QPushButton(Form)
        self.pdf_view_btn.setGeometry(QtCore.QRect(320,10,75,23))
        self.pdf_view_btn.setObjectName("pdf_view_btn")
        self.print_report_btn = QtWidgets.QPushButton(Form)
        self.print_report_btn.setGeometry(QtCore.QRect(440,10,75,23))
        self.print_report_btn.setObjectName("print_report_btn")
        self.webEngineView = QtWebEngineWidgets.QWebEngineView(Form)
        self.webEngineView.setGeometry(QtCore.QRect(40,40,781,651))
        self.webEngineView.setUrl(QtCore.QUrl("about:blank"))
        self.webEngineView.setObjectName("webEngineView")

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)defretranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form","Form"))
        self.pdf_view_btn.setText(_translate("Form","查看报表"))
        self.print_report_btn.setText(_translate("Form","打印报表"))from PyQt5 import QtWebEngineWidgets

打印程序

# -*- coding:utf-8 -*-import os

import win32print
import win32ui
from PIL import Image, ImageWin
import fitz  # fitz就是pip install PyMuPDFimport shutil

classBridgeClass():def__init__(self, Pdf_path):
        self.Pdf_path = Pdf_path
        self.imagePath ='image_temporary'defprint_pdf(self):# 获取打印机信息https://blog.51cto.com/u_16213318/7916941print('...................')
        printer_name = win32print.GetDefaultPrinter()print(printer_name)
        num = self.pyMuPDF_fitz(self.Pdf_path, self.imagePath)for i inrange(1):
            self.img_print(self.imagePath, printer_name, num)
        self.del_files(self.imagePath)defpyMuPDF_fitz(self,pdfPath, imagePath):# print(333)
        pdfDoc = fitz.open(pdfPath)for pg inrange(pdfDoc.page_count):
            page = pdfDoc[pg]
            rotate =int(0)
            zoom_x =2.6# (1.33333333-->1056x816)   (2-->1584x1224)
            zoom_y =2.6

            mat = fitz.Matrix(zoom_x, zoom_y).prerotate(rotate)
            pix = page.get_pixmap(matrix=mat, alpha=False)ifnot os.path.exists(self.imagePath):
                os.makedirs(self.imagePath)
            pix._writeIMG(self.imagePath +'/'+'images_%s.png'% pg,format=1, jpg_quality=95)return pdfDoc.page_count

    defimg_print(self,imagePath, printer_name, num):for i inrange(num):
            hDC = win32ui.CreateDC()
            hDC.CreatePrinterDC(printer_name)# 打开图片
            bmp = Image.open(imagePath +'/'+'images_%s.png'% i)
            w, h = bmp.size
            hDC.StartDoc(imagePath +'/'+'images_%s.png'% i)
            hDC.StartPage()
            dib = ImageWin.Dib(bmp)# (10,10,1024,768)前面的两个数字是坐标，后面两个数字是打印纸张的大小# dib.draw(hDC.GetHandleOutput(), (0, 0, 4958, 7016))
            dib.draw(hDC.GetHandleOutput(),(0,0,4658,6592))
            hDC.EndPage()
            hDC.EndDoc()
        hDC.DeleteDC()defdel_files(self,dir_path):
        shutil.rmtree(dir_path)

三、整体资源下载（包括pdfjs、不用积分）
完成代码下载链接

四、参考资源
1.python - 如何在 PyQt 中使用 pdf.js 查看器呈现 PDF？