python 实现 pdf阅读器

# -*- coding: utf-8 -*-

################################################################################
## Form generated from reading UI file 'file_manage.ui'
##
## Created by: Qt User Interface Compiler version 5.15.2
##
## WARNING! All changes made in this file will be lost when recompiling UI file!
################################################################################

from PySide2.QtCore import *
from PySide2.QtGui import *
from PySide2.QtWidgets import *


class Ui_FileManager(object):
    def setupUi(self, FileManager):
        if not FileManager.objectName():
            FileManager.setObjectName(u"FileManager")
        FileManager.resize(950, 719)
        icon = QIcon()
        icon.addFile(u"\u8bfe\u4ef6.png", QSize(), QIcon.Normal, QIcon.Off)
        FileManager.setWindowIcon(icon)
        self.centralwidget = QWidget(FileManager)
        self.centralwidget.setObjectName(u"centralwidget")
        self.tree = QTreeWidget(self.centralwidget)
        __qtreewidgetitem = QTreeWidgetItem()
        __qtreewidgetitem.setText(0, u"1");
        self.tree.setHeaderItem(__qtreewidgetitem)
        self.tree.setObjectName(u"tree")
        self.tree.setGeometry(QRect(0, 0, 256, 671))
        self.verticalLayoutWidget = QWidget(self.centralwidget)
        self.verticalLayoutWidget.setObjectName(u"verticalLayoutWidget")
        self.verticalLayoutWidget.setGeometry(QRect(260, 0, 681, 671))
        self.verticalLayout = QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setObjectName(u"verticalLayout")
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        FileManager.setCentralWidget(self.centralwidget)
        self.menubar = QMenuBar(FileManager)
        self.menubar.setObjectName(u"menubar")
        self.menubar.setGeometry(QRect(0, 0, 950, 22))
        FileManager.setMenuBar(self.menubar)
        self.statusbar = QStatusBar(FileManager)
        self.statusbar.setObjectName(u"statusbar")
        FileManager.setStatusBar(self.statusbar)

        self.retranslateUi(FileManager)

        QMetaObject.connectSlotsByName(FileManager)
    # setupUi

    def retranslateUi(self, FileManager):
        FileManager.setWindowTitle(QCoreApplication.translate("FileManager", u"\u6587\u4ef6\u7ba1\u7406\u5668", None))
    # retranslateUi

import sys
import os
from PySide2.QtWidgets import *
from ui_file_manage import Ui_FileManager
from PySide2.QtCore import QUrl, Qt
from PySide2.QtGui import QIcon, QBrush, QColor
from PySide2.QtWebEngineWidgets import QWebEngineView

class FileManager(QMainWindow, Ui_FileManager):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.init_tree()
        self.browser = QWebEngineView()
        settings = self.browser.settings()
        settings.setAttribute(settings.PluginsEnabled, True)
        settings.setAttribute(settings.PdfViewerEnabled, True)
        self.verticalLayout.addWidget(self.browser)
        self.show()

    def init_tree(self):
        self.tree.setColumnCount(1)
        #隐藏头部标题
        self.tree.setHeaderHidden(True)
        #设置根节点
        root=QTreeWidgetItem(self.tree)
        root.setText(0,'文件管理器')
        root.setIcon(0,QIcon('课件.png'))
        #设置列的宽度
        self.tree.setColumnWidth(0,200)
        files = os.listdir()
        for file in files:
            if os.path.isdir(file) and file[0].isdigit():
                child=QTreeWidgetItem(root)
                child.setText(0,file)
                sections = os.listdir(file)
                child.setIcon(0, QIcon('文件夹.png'))
                for section in sections:
                    child_2 = QTreeWidgetItem(child)
                    child_2.setText(0, section)
                    child_2.setIcon(0, QIcon('pdf.png'))
        self.tree.addTopLevelItem(root)
        self.tree.clicked.connect(self.load_pdf)
        self.tree.expandAll()

    def load_pdf(self):
        item=self.tree.currentItem().text(0)
        parent = self.tree.currentItem().parent().text(0)
        self.browser.load(QUrl.fromLocalFile(os.path.realpath(f"{parent}/{item}")))

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = FileManager()
    sys.exit(app.exec_())