In this PyQt5 tutorial, I will be covering how to assign a QLabel keyboard shortcut to a paired widget with QLabel’s setBuddy method.

When the user presses the shortcut key indicated by this label, the keyboard focus is transferred to the label’s buddy widget.

The buddy mechanism is only available for QLabels that contain text in which one character is prefixed with an ampersand, ‘&’.

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Source Code:

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QLineEdit, QPushButton, QFormLayout

# Use setBuddy method to quickly assign shortcut key to set focus on the buddy widget

class MyApp(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('setBuddy tutorial')
        layout = QFormLayout()
        self.setLayout(layout)

        labelUsername = QLabel('&Username: ')
        editUsername = QLineEdit('')
        layout.addRow(labelUsername, editUsername)

        labelPassword = QLabel('&Password: ')
        editPassword = QLineEdit()
        layout.addRow(labelPassword, editPassword)

        btn = QPushButton('&Enter')
        btn.setMinimumWidth(400)
        btn.clicked.connect(lambda: print('Hello World'))
        layout.addRow(btn, QLabel())

        labelUsername.setBuddy(editUsername)
        labelPassword.setBuddy(editPassword)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setStyleSheet('''
        QWidget {
            font-size: 35px;
        }
    ''')
    
    myApp = MyApp()
    myApp.show()

    try:
        sys.exit(app.exec_())
    except SystemExit:
        print('Closing Window...')

#python #pyqt5