pyqt5 graphicsView 加载显示图片，在图片上鼠标框选红色矩形并返回矩形在图片上的坐标 完整代码

以下是一个实现你要求功能的完整代码： ```python import sys from PyQt5.QtGui import * from PyQt5.QtWidgets import * from PyQt5.QtCore import * class GraphicsView(QGraphicsView): def __init__(self): super().__init__() self.scene = QGraphicsScene(self) self.setScene(self.scene) self.setSceneRect(-500, -500, 1000, 1000) self.image = QImage("image.jpg") self.pixmap = QPixmap.fromImage(self.image) self.item = QGraphicsPixmapItem(self.pixmap) self.scene.addItem(self.item) self.rubberBand = QRubberBand(QRubberBand.Rectangle, self) self.origin = QPoint() def mousePressEvent(self, event): if event.button() == Qt.LeftButton: self.origin = event.pos() self.rubberBand.setGeometry(QRect(self.origin, QSize())) self.rubberBand.show() super().mousePressEvent(event) def mouseMoveEvent(self, event): if self.rubberBand.isVisible(): self.rubberBand.setGeometry(QRect(self.origin, event.pos()).normalized()) super().mouseMoveEvent(event) def mouseReleaseEvent(self, event): if event.button() == Qt.LeftButton: self.rubberBand.hide() rect = self.rubberBand.geometry() x = rect.x() + self.horizontalScrollBar().value() y = rect.y() + self.verticalScrollBar().value() width = rect.width() height = rect.height() print("Selected rect: ({}, {}), width: {}, height: {}".format(x, y, width, height)) super().mouseReleaseEvent(event) if __name__ == "__main__": app = QApplication(sys.argv) view = GraphicsView() view.show() sys.exit(app.exec_()) ``` 这个程序使用PyQt5的Graphics View框架加载并显示一张图片，并且允许用户在图片上用鼠标框选红色矩形。当用户释放鼠标时，程序会打印出选中矩形的左上角坐标以及宽度和高度。