TAB key is not working in PYQT5

monamour

Dear All.

 Once I press the "TAB KEY" from the keyboard, should move to the next field and execute function or just print 'xxx'.

The code:

def keyPressEvent(self, event):
        key = event.key()
        if key == QtCore.Qt.Key_Tab:
             #self.ID()
             print('xxx')

But is not working at all.

I am using pyqt5

Many thanks,

jsulm

@monamour said in TAB key is not working in PYQT5:

keyPressEvent

Did you make sure it is called?
Also: where (in which class/widget) did you actually define it?

monamour

Hi Mr. jsulm, this is my whole code,


from PyQt5 import QtCore, QtGui, QtWidgets



class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(282, 130, 181, 41))
        self.lineEdit.setObjectName("lineEdit")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(216, 140, 51, 20))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(210, 210, 51, 41))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        self.textBrowser = QtWidgets.QTextBrowser(self.centralwidget)
        self.textBrowser.setGeometry(QtCore.QRect(280, 210, 91, 41))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.textBrowser.sizePolicy().hasHeightForWidth())
        self.textBrowser.setSizePolicy(sizePolicy)
        self.textBrowser.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.textBrowser.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContents)
        self.textBrowser.setTabChangesFocus(False)
        self.textBrowser.setObjectName("textBrowser")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        #self.Handel_Buttons()
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def keyPressEvent(self, event):
        key = event.key()
        if key == QtCore.Qt.Key_Tab:
             #self.ID()
             print('xxx')


    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "ID"))
        self.label_2.setText(_translate("MainWindow", "D.O.B"))

  

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_())

jsulm

@monamour Did you make sure keyPressEvent called?

monamour

@jsulm I don't know if I did call it or not I just run the program then press 'TAB' from the keyboard.

jsulm

@monamour It's not you who calls it.
Simply do

def keyPressEvent(self, event):
    print("keyPressEvent called")
        key = event.key()
        if key == QtCore.Qt.Key_Tab:
             #self.ID()
             print('xxx')

and see whether "keyPressEvent called" is printed...

monamour

@jsulm said in TAB key is not working in PYQT5:

print("keyPressEvent called")

It did not.

monamour

@jsulm Hi, Now the code has changed to,

def keyPressEvent(self):
        print('HI')
        if QtCore.Qt.Key_Tab:
            self.ID()

'ID function'

 def ID(self):
        number = self.lineEdit.text()
            digit = int(number[5])
            digit1 = int(number[6])
            digit2 = int(number[3])
            digit3 = int(number[4])
            digit4 = int(number[1])
            digit5 = int(number[2])
``
self.textBrowser.append ('%d%d/%d%d/19%d%d' % (digit, digit1,digit2,digit3,digit4,digit5))

it's printed the statement 'HI', however, error when execute the function 'ID' ,

 digit = int(number[5])
IndexError: string index out of range

Thanks,

Kent-Dorfman

The key event listener shouldn't go under the UI class. It needs to be under the QWidget subclass being displayed...in your case QMainWindow. the UI class doesn't inherit from a base that supplies that method, so it will never be called.

monamour

@Kent-Dorfman Hi dear, this the whole code,



from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(282, 130, 181, 41))
        self.lineEdit.setObjectName("lineEdit")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(216, 140, 51, 20))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(210, 210, 51, 41))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        self.textBrowser = QtWidgets.QTextBrowser(self.centralwidget)
        self.textBrowser.setGeometry(QtCore.QRect(280, 210, 91, 41))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.textBrowser.sizePolicy().hasHeightForWidth())
        self.textBrowser.setSizePolicy(sizePolicy)
        self.textBrowser.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.textBrowser.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContents)
        self.textBrowser.setTabChangesFocus(False)
        self.textBrowser.setObjectName("textBrowser")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(290, 290, 75, 23))
        self.pushButton.setObjectName("pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
        
        self.Handel_Buttons()
        self.keyPressEvent()

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "ID"))
        self.label_2.setText(_translate("MainWindow", "D.O.B"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))

    def Handel_Buttons(self):
        self.pushButton.clicked.connect(self.ID)


    def keyPressEvent(self):
        print('HI')
        if QtCore.Qt.Key_Tab:
            self.ID()



    def ID(self):
         number = self.lineEdit.text()
         #number = '279121100762'
        #print(int(number[5]))
         digit = int(number[5])
         digit1 = int(number[6])
         digit2 = int(number[3])
         digit3 = int(number[4])
         digit4 = int(number[1])
         digit5 = int(number[2])
        #self.textBrowser.append(str[digit,digit1])

         self.textBrowser.append ('%d%d/%d%d/19%d%d' % (digit, digit1,digit2,digit3,digit4,digit5))





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_())

Kent-Dorfman

I see that, but it's still wrong...you need to subclass your main window and override the key event handler there.

monamour

@Kent-Dorfman Please check it after it has edited it again. Many thanks,

Kent-Dorfman

based on what you REALLY ARE TRYING TO DO, forget about the tab key and follow the path discussed in <This Link>

monamour

@Kent-Dorfman Many thanks,