Python PyQtGraph禁用鼠标滚轮，但保留鼠标的其他功能不变

我有一个pyqtgraph.ViewBox小部件，其中有一个图像。鼠标已启用，因此我可以在图像上选择一个矩形并将其缩放。但是有一个不需要的特性，缩放也发生在鼠标滚轮滚动上

我怎样才能只禁用鼠标滚轮，而保持其余的不变

from PyQt5.QtWidgets import QApplication, QMainWindow
import pyqtgraph as pg
import cv2


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        pg.setConfigOption('imageAxisOrder', 'row-major')
        pg.setConfigOption('leftButtonPan', False)  # if False, then dragging the left mouse button draws a rectangle
    
        self.grid = pg.GraphicsLayoutWidget()
        self.top_left = self.grid.addViewBox(row=1, col=1)

        image = cv2.imread('/path/to/your/image.jpg', cv2.IMREAD_UNCHANGED)
        self.image_item = pg.ImageItem()
        self.image_item.setImage(image)
        self.top_left.addItem(self.image_item)

        self.setCentralWidget(self.grid)


def main():
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()


if __name__ == '__main__':
    main()

---

您可以在ViewBox上安装事件过滤器，并捕获鼠标滚轮事件，在本例中为QEvent.GraphicsCeneWheel

---

这比公认的答案要简单得多。在ViewBox上使用setMouseEnabled：

from PyQt5.QtWidgets import QApplication, QMainWindow
import pyqtgraph as pg
import cv2


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        pg.setConfigOption('imageAxisOrder', 'row-major')
        pg.setConfigOption('leftButtonPan', False)  # if False, then dragging the left mouse button draws a rectangle

        self.grid = pg.GraphicsLayoutWidget()
        self.top_left = self.grid.addViewBox(row=1, col=1)
        self.top_left.setMouseEnabled(x=False, y=False)  # <--- Add this line

        image = cv2.imread('/path/to/your/image.jpg', cv2.IMREAD_UNCHANGED)
        self.image_item = pg.ImageItem()
        self.image_item.setImage(image)
        self.top_left.addItem(self.image_item)

        self.setCentralWidget(self.grid)


def main():
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()


if __name__ == '__main__':
    main()

---

我尝试了你的建议，但没有成功，所以接受的答案对我来说仍然是更好的解决方案。我正在使用pyqtgraph-0.11.0。当你说它不起作用时，那是什么意思？我不确定我是否误解了这个问题。不工作意味着没有忽略鼠标滚轮的缩放。问题是忽略轮子，而只忽略轮子，而被接受的解决方案就是这样。

from PyQt5.QtWidgets import QApplication, QMainWindow
import pyqtgraph as pg
import cv2


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        pg.setConfigOption('imageAxisOrder', 'row-major')
        pg.setConfigOption('leftButtonPan', False)  # if False, then dragging the left mouse button draws a rectangle

        self.grid = pg.GraphicsLayoutWidget()
        self.top_left = self.grid.addViewBox(row=1, col=1)
        self.top_left.setMouseEnabled(x=False, y=False)  # <--- Add this line

        image = cv2.imread('/path/to/your/image.jpg', cv2.IMREAD_UNCHANGED)
        self.image_item = pg.ImageItem()
        self.image_item.setImage(image)
        self.top_left.addItem(self.image_item)

        self.setCentralWidget(self.grid)


def main():
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()


if __name__ == '__main__':
    main()