PYQT5 QWEBENGINEVIEW在打印时质量低

Question

我正在尝试使用 qwebengineview 在 pyqt5 中打印页面。在Preview qwebengineview.show（）它以正常质量显示，但是当我打印页面时，质量是最低的

，我认为问题是不良的打印设备。 的内容时

import os
import sys
import argparse

from PyQt5.QtCore import QUrl
from PyQt5.QtPrintSupport import QPrinter
from PyQt5.QtWebEngineWidgets import QWebEngineView
from PyQt5.QtWidgets import QApplication
import win32print

class PrinterView(QWebEngineView):
    def __init__(self, url=None, filename=None, do_preview=False, parent=None):
        super(PrinterView, self).__init__(parent)
        win32print.SetDefaultPrinter("XP-80C") 
        self.do_preview = do_preview
       
        self.load(QUrl('https://stackoverflow.com/questions/41710994/create-a-pdf-with-fillable-fields-python'))
        self.setZoomFactor(1)
      
      
        self.printer = QPrinter(QPrinter.HighResolution)
        self.printer.setOrientation(QPrinter.Portrait)
        self.printer.setFullPage(True)

        self.loadFinished.connect(self.onloadFinished)

    def print_completed(self, dsd):
        pass

    def onloadFinished(self):
        if self.do_preview:
            self.show()
        else:
            self.page().print(self.printer, self.print_completed)

但是，当我打印qtextedit（ ） page