I'll cover the topic of "Custom Widgets and Components" with a focus on creating a custom, animated circular progress bar using PyQt6. This widget can be used to display the progress of a task in a visually appealing way. **Topic: Custom Widgets and Components** **Project:** Animated Circular Progress Bar In this example, we'll create a custom widget that displays a circular progress bar with animated progress. We'll use PyQt6 to design and implement the widget. **Design Requirements:** * The widget should display a circular progress bar with a customizable color scheme. * The progress bar should be animated, with the progress updating smoothly. * The widget should have a method to set the progress value (0-100). * The widget should have a method to set the color scheme. **Implementation:** ```python import sys from PyQt6.QtCore import Qt, QTimer, QPoint, QRect from PyQt6.QtGui import QPainter, QBrush, QPen, QColor from PyQt6.QtWidgets import QApplication, QWidget class CircularProgressbar(QWidget): def __init__(self): super().__init__() self.progress_value = 0 self.color_scheme = Qt.GlobalColor.blue self.animation_timer = QTimer() self.animation_timer.timeout.connect(self.animate_progress) self.animation_timer.start(16) # 60 FPS def paintEvent(self, event): painter = QPainter(self) painter.setRenderHint(painter.Antialiasing) # Draw background painter.setPen(Qt.GlobalColor.black) painter.setBrush(QBrush(Qt.GlobalColor.white)) painter.drawEllipse(0, 0, self.width(), self.height()) # Draw progress bar painter.setPen(QPen(self.color_scheme, 10)) painter.setBrush(QBrush(Qt.GlobalColor-transparent)) painter.drawEllipse(5, 5, self.width() - 10, self.height() - 10) # Draw progress value painter.setPen(QPen(self.color_scheme, 2)) painter.setBrush(QBrush(Qt.GlobalColor-transparent)) painter.drawText(QRect(0, 0, self.width(), self.height()), Qt.AlignCenter, f"{self.progress_value}%") def animate_progress(self): if self.progress_value < 100: self.progress_value += 1 self.update() def set_progress_value(self, value): self.progress_value = value self.update() def set_color_scheme(self, color): self.color_scheme = color self.update() if __name__ == "__main__": app = QApplication(sys.argv) progressbar = CircularProgressbar() progressbar.setFixedSize(200, 200) progressbar.set_color_scheme(Qt.GlobalColor.green) progressbar.show() sys.exit(app.exec()) ``` In this example, we create a custom QWidget subclass called `CircularProgressbar`. This widget has a private `animation_timer` object that updates the progress value every 16 milliseconds (approximately 60 FPS), which creates a smooth animation effect. The `paintEvent` method handles the drawing of the widget, including the background, progress bar, and progress value. We use a QPainter object to draw the shapes and text. The `animate_progress` method updates the progress value and calls the `update` method to trigger a repaint. The `set_progress_value` and `set_color_scheme` methods allow us to set the progress value and color scheme of the widget programmatically. To use this widget in your application, simply create an instance of `CircularProgressbar` and set its properties as needed. You can also subclass `CircularProgressbar` to add custom features or modify its behavior. **Illustration:** Here's an example of what the `CircularProgressbar` widget might look like in action: [Insert screenshot or image] In this example, the progress bar is displayed with a green color scheme and an animated progress value that updates smoothly. This implementation demonstrates how to create a custom, animated circular progress bar using PyQt6. You can use this widget in your own applications to provide a visually appealing way to display progress.