带工具栏的QMainWindow上的PyQt5 - drawPixmap (不适合窗口)

from PyQt5.QtWidgets import QMainWindow, QApplication, QGraphicsView, QGraphicsScene
from PyQt5.QtGui import QPixmap
import sys

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        # 创建一个QGraphicsView和QGraphicsScene
        self.view = QGraphicsView()
        self.scene = QGraphicsScene()
        self.view.setScene(self.scene)

        # 设置主窗口的中央部件为QGraphicsView
        self.setCentralWidget(self.view)

        # 加载图像
        pixmap = QPixmap("image.jpg")

        # 创建一个QGraphicsPixmapItem，并将其添加到QGraphicsScene中
        pixmap_item = self.scene.addPixmap(pixmap)

        # 调整视图的大小以适应图像
        self.view.fitInView(pixmap_item, aspectRatioMode=Qt.KeepAspectRatio)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())