在pyqt5中使用QPainterPath填充绘制的路径

from PyQt5.QtWidgets import QApplication, QMainWindow, QGraphicsScene, QGraphicsView
from PyQt5.QtGui import QPainter, QPainterPath, QBrush, QColor
from PyQt5.QtCore import Qt

class MyWidget(QWidget):
    def paintEvent(self, event):
        painter = QPainter(self)
        path = QPainterPath()
        path.moveTo(50, 50)
        path.lineTo(200, 50)
        path.lineTo(200, 200)
        path.lineTo(50, 200)
        path.closeSubpath()

        brush = QBrush(QColor(255, 0, 0))
        painter.setBrush(brush)
        painter.drawPath(path)

app = QApplication(sys.argv)
window = QMainWindow()
window.setWindowTitle("QPainterPath填充绘制路径示例")
window.setGeometry(100, 100, 300, 300)

scene = QGraphicsScene()
widget = MyWidget()
scene.addWidget(widget)

view = QGraphicsView(scene)
window.setCentralWidget(view)

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