PyQt5 - Message Box

PyQt5 - Message Box

In PyQt5, a message box is a simple dialog that informs the user about something or prompts them for a response. The QMessageBox class provides a way to show messages to the user.

Here's a basic tutorial on how to use QMessageBox in PyQt5:

  • Install PyQt5:

If you haven't already, you need to install PyQt5:

pip install pyqt5
  • Basic Use of QMessageBox:

Here's a simple example where we create a button, and when this button is clicked, a message box pops up:

import sys from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QMessageBox class App(QMainWindow): def __init__(self): super().__init__() self.title = 'PyQt5 Message Box' self.initUI() def initUI(self): self.setWindowTitle(self.title) self.setGeometry(100, 100, 400, 200) # Create a button button = QPushButton('Show MessageBox', self) button.move(50, 70) button.clicked.connect(self.show_message_box) self.show() def show_message_box(self): # Displaying a message box QMessageBox.information(self, 'Message Box Title', 'This is a message box text.') if __name__ == '__main__': app = QApplication(sys.argv) ex = App() sys.exit(app.exec_())

In the code above:

  • We create a QPushButton widget.
  • The show_message_box method is connected to the button's clicked signal.
  • Inside the show_message_box method, we display a message box using the QMessageBox.information() method. This displays an informational message box with a specified title and text.

There are other types of message boxes you can use:

  • QMessageBox.question(): Shows a question message box.
  • QMessageBox.warning(): Shows a warning message box.
  • QMessageBox.critical(): Shows a critical error message box.
  • QMessageBox.about(): Shows an "About" message box.

You can also customize the buttons that appear in the message box and capture the user's response, but the example above should provide a basic understanding of how to use QMessageBox in PyQt5.

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