关于#pyqt#的问题，如何解决？

Question

通过pyqt5做一个圆形水波纹进度条，同时可以在qt desinger显示出来

Answer 1

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QProgressBar
from PyQt5.QtCore import Qt

class CircleProgressBar(QProgressBar):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setRange(0, 100)
        self.setAlignment(Qt.AlignCenter)
        self.setFormat("%p%")

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)

        # 绘制圆形进度条背景
        painter.save()
        painter.setPen(Qt.NoPen)
        painter.setBrush(self.palette().alternateBase())
        rect = self.rect().adjusted(1, 1, -1, -1)
        painter.drawEllipse(rect)
        painter.restore()

        # 绘制圆形进度条
        painter.save()
        painter.setPen(Qt.NoPen)
        brush = self.palette().highlight()
        value = self.value()
        start_angle = 90
        span_angle = -360 * value / 100
        painter.setBrush(brush)
        painter.drawPie(rect, start_angle * 16, span_angle * 16)
        painter.restore()

app = QApplication(sys.argv)
window = QWidget()
window.setWindowTitle("Circle Progress Bar")

progress_bar = CircleProgressBar(window)

window.show()
sys.exit(app.exec_())