**Topic: Custom Widgets and Components - Animated Progress Indicator** In this example, we'll create a custom animated progress indicator widget using PyQt6. This widget will have a circular progress bar with a smooth animation effect. **Widget Design** Our widget will consist of a circular progress bar with a text label in the center. The progress bar will have a smooth animation effect. **Code** ```python import sys from PyQt6.QtCore import Qt, QTimer, QRect from PyQt6.QtGui import QPainter, QPen, QFont, QBrush from PyQt6.QtWidgets import QWidget, QApplication class AnimatedProgressIndicator(QWidget): def __init__(self): super().__init__() self.progress = 0 self.angle = 0 self.max_angle = 360 self.min_angle = 0 self.timer = QTimer() self.timer.timeout.connect(self.animate) self.timer.start(16) # 60 FPS self.setStyleSheet("background-color: white;") def paintEvent(self, event): painter = QPainter(self) painter.setRenderHint(painter.Antialiasing) # Draw circle painter.setPen(QPen(Qt.GlobalColor.black, 5, Qt.PenStyle.SolidLine)) painter.setBrush(QBrush(Qt.GlobalColor.white, Qt.BrushStyle.SolidPattern)) painter.drawEllipse(50, 50, 200, 200) # Draw progress arc painter.setPen(QPen(Qt.GlobalColor.darkBlue, 10, Qt.PenStyle.SolidLine)) painter.drawPie(50, 50, 200, 200, self.min_angle * 16, self.angle * 16) # Draw text label font = QFont("Arial", 48) painter.setFont(font) painter.setPen(QPen(Qt.GlobalColor.black, 3, Qt.PenStyle.SolidLine)) painter.drawText(QRect(50, 50, 200, 200), Qt.AlignmentFlag.AlignCenter, f"{self.progress}%") def animate(self): self.progress += 1 self.angle += 4 if self.angle >= self.max_angle: self.angle = self.min_angle self.progress = 0 self.update() if __name__ == "__main__": app = QApplication(sys.argv) progress_indicator = AnimatedProgressIndicator() progress_indicator.resize(300, 300) progress_indicator.show() sys.exit(app.exec()) ``` **Explanation** This code creates a custom animated progress indicator widget using PyQt6. The progress indicator is a circular progress bar with a text label in the center. The progress bar has a smooth animation effect. The `AnimatedProgressIndicator` class is a custom widget that inherits from `QWidget`. It overrides the `paintEvent` method to draw the circular progress bar and the text label. The `paintEvent` method is called whenever the widget needs to be redrawn. The `animate` method is called every 16 milliseconds (60 FPS) to update the progress angle and the text label. The `update` method is called to redraw the widget. **Compilation and Distribution** To compile and distribute the code, save it as a Python file (e.g., `animated_progress_indicator.py`). Run the code using Python: ```bash python animated_progress_indicator.py ``` This will launch the progress indicator widget. **Packaging as a Python Package** To package the code as a Python package, create a directory structure as follows: ```bash animated_progress_indicator/ animated_progress_indicator/ __init__.py animated_progress_indicator.py setup.py requirements.txt ``` Add the following code to `setup.py`: ```python from setuptools import setup setup( name='animated_progress_indicator', version='1.0', packages=['animated_progress_indicator'], install_requires=['PyQt6'], author='Your Name', author_email='your.email@example.com' ) ``` Run the following command to package the code: ```bash python setup.py sdist bdist_wheel ``` This will create a source distribution and a wheel distribution of the package. To install the package, run: ```bash pip install dist/animated_progress_indicator-1.0.tar.gz ``` You can now import the package in your Python code and use the `AnimatedProgressIndicator` class.