PyQt5 virtual keyboard (TypeError: missing 1 required positional argument)



  • I am trying to write a code for virtual keyboard in PyQt5 . Here is my code.

    from PyQt5.QtCore import *
    from PyQt5.QtWidgets import *
    
    
    class InputState:
        LOWER = 0
        CAPITAL = 1
    
    
    class KeyButton(QPushButton):
        sigKeyButtonClicked = pyqtSignal()
    
        def __init__(self, key):
            super(KeyButton, self).__init__()
    
            self._key = key
            self._activeSize = QSize(50,50)
            self.clicked.connect(self.emitKey)
            self.setSizePolicy(QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed))
    
    
        def emitKey(self):
            self.sigKeyButtonClicked.emit()
    
        def enterEvent(self, event):
            self.setFixedSize(self._activeSize)
    
        def leaveEvent(self, event):
            self.setFixedSize(self.sizeHint())
    
        def sizeHint(self):
            return QSize(40, 40)
    
    class VirtualKeyboard(QWidget):
        sigInputString = pyqtSignal()
        sigKeyButtonClicked = pyqtSignal()
    
        def __init__(self):
            super(VirtualKeyboard, self).__init__()
    
            self.globalLayout = QVBoxLayout(self)
            self.keysLayout = QGridLayout()
            self.buttonLayout = QHBoxLayout()
    
            self.keyListByLines = [
                        ['a', 'z', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'],
                        ['q', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm'],
                        ['w', 'x', 'c', 'v', 'b', 'n', '_', '.', '/', ' '],
                    ]
            self.inputString = ""
            self.state = InputState.LOWER
    
            self.stateButton = QPushButton()
            self.stateButton.setText('Maj.')
            self.backButton = QPushButton()
            self.backButton.setText('<-')
            self.okButton = QPushButton()
            self.okButton.setText('OK')
            self.cancelButton = QPushButton()
            self.cancelButton.setText("Cancel")
    
            self.inputLine = QLineEdit()
    
    
            for lineIndex, line in enumerate(self.keyListByLines):
                for keyIndex, key in enumerate(line):
                    buttonName = "keyButton" + key.capitalize()
                    self.__setattr__(buttonName, KeyButton(key))
                    self.keysLayout.addWidget(self.getButtonByKey(key), self.keyListByLines.index(line), line.index(key))
                    self.getButtonByKey(key).setText(key)
                    self.getButtonByKey(key).sigKeyButtonClicked.connect(self.addInputByKey)
                    self.keysLayout.setColumnMinimumWidth(keyIndex, 50)
                self.keysLayout.setRowMinimumHeight(lineIndex, 50)
    
            self.stateButton.clicked.connect(self.switchState)
            self.backButton.clicked.connect(self.backspace)
            self.okButton.clicked.connect(self.emitInputString) 
            self.cancelButton.clicked.connect(self.emitCancel)
    
    
            self.buttonLayout.addWidget(self.cancelButton)
            self.buttonLayout.addWidget(self.backButton)
            self.buttonLayout.addWidget(self.stateButton)
            self.buttonLayout.addWidget(self.okButton)
    
            self.globalLayout.addWidget(self.inputLine)
            self.globalLayout.addLayout(self.keysLayout)
    
            self.globalLayout.addLayout(self.buttonLayout)
            self.setSizePolicy(QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed))
    
    
        def getButtonByKey(self, key):
            return getattr(self, "keyButton" + key.capitalize())
    
        def getLineForButtonByKey(self, key):
            return [key in keyList for keyList in self.keyListByLines].index(True)
    
        def switchState(self):
            self.state = not self.state
    
        def addInputByKey(self, key):
            self.inputString += (key.lower(), key.capitalize())[self.state]
            self.inputLine.setText(self.inputString)
    
        def backspace(self):
            self.inputLine.backspace()
            self.inputString = self.inputString[:-1]
    
        def emitInputString(self):
            self.sigInputString.emit(self.inputString)
    
        def emitCancel(self):
            self.sigInputString.emit()
    
        def sizeHint(self):
            return QSize(480,272)
    
    
    class Test(QWidget):
        def __init__(self):
            super(Test, self).__init__()
    
            self.b1 = KeyButton("1")
            self.b2 = KeyButton("2")
            self.b3 = KeyButton("3")
            self.b4 = KeyButton("4")
    
            self.layout = QGridLayout(self)
            self.layout.addWidget(self.b1,0,0)
            self.layout.addWidget(self.b2,0,1)
            self.layout.addWidget(self.b3,1,0)
            self.layout.addWidget(self.b4,1,1)
    
    if __name__ == '__main__':
    
        import sys
        app = QApplication(sys.argv)
        win = VirtualKeyboard()
        win.show()
        app.exec_()
    

    I am getting ERROR: TypeError: addInputByKey() missing 1 required positional argument: 'key'

    Any help?



  • This post is deleted!


  • Hi,
    try this in line 71

    self.getButtonByKey(key).sigKeyButtonClicked.connect(lambda: self.addInputByKey(key))
    


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