PyQtGraph：在平移绘图时防止 QScrollArea 滚动

Question

在 PyQtGraph 中，您可以使用滚轮放大绘图。但是，当在 QScrollArea 中嵌入 PyQtGraph 时，滚动会放大悬停的图并滚动 QScrollArea。

最少的可重现代码：

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

app = QApplication([])
window = QMainWindow()
scroll = QScrollArea(window)
window.setCentralWidget(scroll)

frame = pg.GraphicsLayoutWidget()
plot = frame.addPlot().plot([1,2,3], [2,5,10])

scroll.setWidget(frame)
scroll.setWidgetResizable(True)

frame.setFixedHeight(600)
window.setFixedHeight(500)
window.show()
app.exec_()

我尝试在谷歌上搜索该问题，并找到了一种停止平移并允许滚动的方法，但我希望反过来：阻止滚动并允许平移。

PyQtGraph 中是否可以在鼠标悬停时停止 QScrollArea 滚动？

Answer 1

解决办法是取消QScrollArea的wheelEvent：

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


class ScrollArea(QScrollArea):
    def wheelEvent(self, event):
        pass


if __name__ == "__main__":
    import sys

    app = QApplication(sys.argv)
    window = QMainWindow()
    scroll = ScrollArea(window)
    window.setCentralWidget(scroll)

    frame = pg.GraphicsLayoutWidget()
    plot = frame.addPlot().plot([1, 2, 3], [2, 5, 10])

    scroll.setWidget(frame)
    scroll.setWidgetResizable(True)

    frame.setFixedHeight(600)
    window.setFixedHeight(500)
    window.show()
    sys.exit(app.exec_())