我用pyqt设计两个模块，一个是combobox，一个是QPlainTextEdit，两者用insertPlainText槽连接起来，即：
self.shijian.activated['QString'].connect(self.plainTextEdit.insertPlainText)
现在想通过点这combobox使在QPlainTextEdit里的它的文本带有下划线，图解如下
import sys
from untitled9 import Ui_MainWindow
import pkgutil
from PyQt5 import QtWidgets
import PyQt5.sip
class mywindow(QtWidgets.QWidget, Ui_MainWindow): # 这个地方要注意Ui_MainWindow
def __init__(self):
super(mywindow, self).__init__()
self.setupUi(self)
if __name__=="__main__":
app=QtWidgets.QApplication(sys.argv)
myshow=mywindow()
myshow.show()#显示
sys.exit(app.exec_())
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setEnabled(True)
MainWindow.resize(1354, 942)
font = QtGui.QFont()
font.setFamily("仿宋_GB2312")
font.setPointSize(16)
font.setUnderline(False)
MainWindow.setFont(font)
icon = QtGui.QIcon.fromTheme("按时")
MainWindow.setWindowIcon(icon)
MainWindow.setLayoutDirection(QtCore.Qt.LeftToRight)
MainWindow.setAutoFillBackground(True)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setEnabled(True)
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(20)
font.setUnderline(False)
self.centralwidget.setFont(font)
self.centralwidget.setMouseTracking(False)
self.centralwidget.setTabletTracking(False)
self.centralwidget.setObjectName("centralwidget")
self.comboBox_5 = QtWidgets.QComboBox(self.centralwidget)
self.comboBox_5.setGeometry(QtCore.QRect(200, 260, 331, 39))
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(20)
font.setItalic(False)
font.setUnderline(False)
self.comboBox_5.setFont(font)
self.comboBox_5.setFocusPolicy(QtCore.Qt.NoFocus)
self.comboBox_5.setEditable(True)
self.comboBox_5.setObjectName("comboBox_5")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_4.setGeometry(QtCore.QRect(10, 250, 160, 50))
self.pushButton_4.setAutoDefault(False)
self.pushButton_4.setObjectName("pushButton_4")
self.plainTextEdit = QtWidgets.QPlainTextEdit(self.centralwidget)
self.plainTextEdit.setGeometry(QtCore.QRect(580, 110, 711, 701))
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(20)
font.setUnderline(False)
self.plainTextEdit.setFont(font)
self.plainTextEdit.setPlainText("")
self.plainTextEdit.setObjectName("plainTextEdit")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(210, 370, 281, 51))
self.comboBox.setObjectName("comboBox")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1354, 33))
self.menubar.setDefaultUp(True)
self.menubar.setObjectName("menubar")
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setSizeGripEnabled(True)
self.statusbar.setObjectName("statusbar")
self.retranslateUi(MainWindow)
self.comboBox_5.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
self.comboBox.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "ss"))
self.comboBox_5.setItemText(0, _translate("MainWindow", "01时"))
self.comboBox_5.setItemText(1, _translate("MainWindow", "02时"))
self.comboBox_5.setItemText(2, _translate("MainWindow", "03时"))
self.comboBox_5.setItemText(3, _translate("MainWindow", "04时"))
self.comboBox_5.setItemText(4, _translate("MainWindow", "05时"))
self.pushButton_4.setText(_translate("MainWindow", "E"))
self.comboBox.setItemText(0, _translate("MainWindow", "一"))
self.comboBox.setItemText(1, _translate("MainWindow", "二"))
self.comboBox.setItemText(2, _translate("MainWindow", "三"))
