Digital Clock Example

The Digital Clock example shows how to use QLCDNumber to display a number with LCD-like digits.

This example also demonstrates how QTimer can be used to update a widget at regular intervals.

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digitalclock.py

# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import sys

from PySide6.QtCore import QTime, QTimer, Slot
from PySide6.QtWidgets import QApplication, QLCDNumber


class DigitalClock(QLCDNumber):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setSegmentStyle(QLCDNumber.Filled)
        self.setDigitCount(8)

        self.timer = QTimer(self)
        self.timer.timeout.connect(self.show_time)
        self.timer.start(1000)

        self.show_time()

        self.setWindowTitle("Digital Clock")
        self.resize(250, 60)

    @Slot()
    def show_time(self):
        time = QTime.currentTime()
        text = time.toString("hh:mm:ss")

        # Blinking effect
        if (time.second() % 2) == 0:
            text = text.replace(":", " ")

        self.display(text)


if __name__ == "__main__":

    app = QApplication(sys.argv)
    clock = DigitalClock()
    clock.show()
    sys.exit(app.exec())