Button Clicked

Listing 5 scripts/PYQT2/01_main_widget/04_button_click/main.py
 1from PyQt5.QtWidgets import QMainWindow, QApplication, QPushButton, QLabel
 2
 3class MainWindow(QMainWindow, object):
 4    def __init__(self, parent=None):
 5        super(MainWindow, self).__init__(parent)
 6
 7        self.init_ui()
 8
 9    def init_ui(self):
10        self.button = QPushButton("Click Me!", self)
11        self.label = QLabel("Button not clicked.", self)
12
13        self.button.move(50, 20)
14        self.button.clicked.connect(self.on_button_click)
15
16        self.label.move(50, 60)
17
18    def on_button_click(self):
19        self.label.setText("Button clicked!")
20
21if __name__ == "__main__":
22    app = QApplication([])
23    mainWindow = MainWindow()
24    mainWindow.show()
25    app.exec_()

  • This example connects a click event to the button to change the label’s text.

  • The clicked.connect() method is used to connect the method to be executed on button click (the on_button_click function).