在PyQt中根据BB坐标选择特定区域

from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget
from PyQt5.QtGui import QPainter, QColor, QPen, QBrush
from PyQt5.QtCore import QRect

class MyWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        
    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)
        
        # 根据BB坐标选择特定区域
        bb_x = 100
        bb_y = 100
        bb_width = 200
        bb_height = 150
        rect = QRect(bb_x, bb_y, bb_width, bb_height)
        
        # 设置绘图区域
        painter.setClipRect(rect)
        
        # 绘制矩形区域
        painter.setPen(QPen(QColor(255, 0, 0), 2))
        painter.setBrush(QBrush(QColor(255, 0, 0, 128)))
        painter.drawRect(rect)

class MyWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        
        self.setWindowTitle("BB坐标选择特定区域示例")
        
        widget = MyWidget(self)
        self.setCentralWidget(widget)

if __name__ == "__main__":
    app = QApplication([])
    window = MyWindow()
    window.show()
    app.exec_()