如何以txt或rtf格式显示自定义python QTextEdit效果（如下划线）？

Question

我遇到一个问题，当我将QTextEdit中的文本另存为txt或rtf时，它不会保存下划线和字体大小之类的内容。 这是代码：

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

# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!

import gi
import signal
gi.require_version('Gtk', '3.0')
import sys
import dbus
import pygtk
import gi
import signal
from PyQt4 import QtCore, QtGui
from PyQt4.QtCore import pyqtSlot
from PyQt4.QtCore import QUrl
from PyQt4.QtWebKit import QWebView

import sip
sip.setapi('QString', 2)
sip.setapi('QVariant', 2)

gi.require_version('Notify', '0.7')


try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(679, 600)

        self.underlined = False
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))

        self.saveButton = QtGui.QPushButton(self.centralwidget)
        self.saveButton.setGeometry(QtCore.QRect(10, 0, 88, 28))
        self.saveButton.setObjectName(_fromUtf8("pushButton"))

        self.textEdit = QtGui.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(0, 30, 681, 800))
        self.textEdit.setObjectName(_fromUtf8("textEdit"))

        self.fontButton = QtGui.QPushButton(self.centralwidget)
        self.fontButton.setGeometry(QtCore.QRect(400, 0, 88, 28))
        self.fontButton.setObjectName(_fromUtf8("fontButton"))

        self.fontSize = QtGui.QLineEdit(self.centralwidget)
        self.fontSize.setGeometry(QtCore.QRect(100, 0, 28, 28))
        self.fontSize.setObjectName(_fromUtf8("fontEdit"))
        self.fontSize.returnPressed.connect(self.fontButton.click)

        self.underlineButton = QtGui.QPushButton(self.centralwidget)
        self.underlineButton.setGeometry(QtCore.QRect(130, 0, 28, 28))
        self.underlineButton.setObjectName(_fromUtf8("underlineButton"))

        self.disableUnderlineButton = QtGui.QPushButton(self.centralwidget)
        self.disableUnderlineButton.setGeometry(QtCore.QRect(160, 0, 28, 28))
        self.disableUnderlineButton.setObjectName(_fromUtf8("disableUnderlineButton"))


        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 679, 24))
        self.menubar.setObjectName(_fromUtf8("menubar"))

        self.menuTest = QtGui.QMenu(self.menubar)
        self.menuTest.setObjectName(_fromUtf8("menuTest"))
        MainWindow.setMenuBar(self.menubar)

        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        MainWindow.setStatusBar(self.statusbar)
        self.menubar.addAction(self.menuTest.menuAction())

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        def save(self):
            with open('log.rtf', 'w') as yourFile:
                yourFile.write(str(self.textEdit.toPlainText()))

        def saveFont(self):
            self.textEdit.setFontPointSize(int(self.fontSize.text()))

        def underline(self):
            self.textEdit.setFontUnderline(True)

        def disableUnderline(self):
            self.textEdit.setFontUnderline(False)

        def commander(self):
            save(self)
        self.textEdit.setHtml('<u>hi</u>')
        self.saveButton.clicked.connect(lambda: save(self))
        self.fontButton.clicked.connect(lambda: saveFont(self))
        self.underlineButton.clicked.connect(lambda: underline(self))
        self.disableUnderlineButton.clicked.connect(lambda: disableUnderline(self))




    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
        self.saveButton.setText(_translate("MainWindow", "Save text", None))
        self.fontButton.setText(_translate("MainWindow", "Save Font", None))
        self.menuTest.setTitle(_translate("MainWindow", "test", None))
        self.underlineButton.setText(_translate("MainWindow", "Uon", None))
        self.disableUnderlineButton.setText(_translate("MainWindow", "Uoff", None))


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

我尝试使用HTML和其他格式修复此问题，但无法使其正常工作。

Answer 1

这是因为您要使用toPlainText将文本转换为纯文本 ，其中不包含任何格式信息。

yourFile.write(str(self.textEdit.toPlainText()))

如果要保留格式，则需要使用toHtml 。

yourFile.write(str(self.textEdit.toHtml()))

请注意，这与rtf 。 它甚至还不是完全标准的HTML，如果您尝试在除QTextEdit之外的另一个HTML查看器中查看它，则显示的内容可能会有所不同。 以我的经验，从QTextEdit生成的HTML非常丑陋，并且只有计划在QTextEdits显示它时，它才能很好地工作。