PyQt5专注于只读QLineEdit小部件

Question

我有 3 个只读的 QLineEdit 小部件，它们侦听键事件。好吧，我想让用户选择他将使用的QLineEdit(因为它将是一个快捷方式设置窗口(。当小部件在只读模式下不可单击时，它会显示。有没有办法使其可点击或在没有只读的情况下做同样的事情？

我在Qt Designer中编写了代码。

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(392, 290)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(140, 70, 113, 21))
        self.lineEdit.setReadOnly(True)
        self.lineEdit.setAlignment(QtCore.Qt.AlignCenter)
        MainWindow.keyPressEvent = self.newOnkeyPressEvent1
        self.lineEdit.setObjectName("lineEdit")
        self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_2.setGeometry(QtCore.QRect(140, 150, 113, 21))
        self.lineEdit_2.setReadOnly(True)
        self.lineEdit_2.setAlignment(QtCore.Qt.AlignCenter)
        MainWindow.keyPressEvent = self.newOnkeyPressEvent2
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.lineEdit_3 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_3.setGeometry(QtCore.QRect(140, 220, 113, 21))
        self.lineEdit_3.setReadOnly(True)
        self.lineEdit_3.setAlignment(QtCore.Qt.AlignCenter)
        MainWindow.keyPressEvent = self.newOnkeyPressEvent3
        self.lineEdit_3.setObjectName("lineEdit_3")
        MainWindow.setCentralWidget(self.centralwidget)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    def newOnkeyPressEvent1(self, event):
        key = event.key()
        modifiers = int(event.modifiers())
        keyname = QtGui.QKeySequence(modifiers + key).toString()
        print(keyname)
        self.lineEdit.setText(str(keyname))
    def newOnkeyPressEvent2(self, event):
        key = event.key()
        modifiers = int(event.modifiers())
        keyname = QtGui.QKeySequence(modifiers + key).toString()
        print(keyname)
        self.lineEdit_2.setText(str(keyname))
    def newOnkeyPressEvent3(self, event):
        key = event.key()
        modifiers = int(event.modifiers())
        keyname = QtGui.QKeySequence(modifiers + key).toString()
        print(keyname)
        self.lineEdit_3.setText(str(keyname))
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))

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

Answer 1

您需要

确定哪个行编辑在焦点下，self.centralwidget.focusWidget() .这是完整的工作代码：

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(392, 290)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(140, 70, 113, 21))
        self.lineEdit.setReadOnly(True)
        self.lineEdit.setAlignment(QtCore.Qt.AlignCenter)
        MainWindow.keyPressEvent = self.newOnkeyPressEvent
        self.lineEdit.setObjectName("lineEdit")
        self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_2.setGeometry(QtCore.QRect(140, 150, 113, 21))
        self.lineEdit_2.setReadOnly(True)
        self.lineEdit_2.setAlignment(QtCore.Qt.AlignCenter)
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.lineEdit_3 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_3.setGeometry(QtCore.QRect(140, 220, 113, 21))
        self.lineEdit_3.setReadOnly(True)
        self.lineEdit_3.setAlignment(QtCore.Qt.AlignCenter)
        self.lineEdit_3.setObjectName("lineEdit_3")
        MainWindow.setCentralWidget(self.centralwidget)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    def newOnkeyPressEvent(self, event):
        key = event.key()
        modifiers = int(event.modifiers())
        keyname = QtGui.QKeySequence(modifiers + key).toString()
        print(keyname)
        lineEdit = self.centralwidget.focusWidget()
        lineEdit.setText(str(keyname))
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))

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