无法从 Qt5 中的 QWheelEvent 获取 pixelDelta

Question

我从 Qt4 升级到 Qt5（具体来说是 PyQt），QWheelEvent 对我来说坏了 - 它 returns 空 pixelDelta()，但相位为 2（默认）。我在 Win 7 上，所以关于阶段的警告不应该适用于我。当我运行此代码时：

from PyQt5 import QtWidgets


class Q(QtWidgets.QLabel):

    def wheelEvent(self, event):
        print(event.pixelDelta())

app = QtWidgets.QApplication([])
w = Q()
w.show()
app.exec_()

滚动打印 'PyQt5.QtCore.QPoint()' 没有坐标。我能做什么？

Answer 1

来自 QWheelEvent 的 Qt5 文档：

There are two ways to read the wheel event delta: angleDelta() returns the delta in wheel degrees. This value is always provided. pixelDelta() returns the delta in screen pixels and is available on platforms that have high-resolution trackpads, such as OS X.

Qt4中没有pixelData。它只有 delta, and the equivalent Qt5 method to that is angleDelta.

无法从 Qt5 中的 QWheelEvent 获取 pixelDelta

Cannot get pixelDelta from QWheelEvent in Qt5

python

events

mousewheel

qt5

pyqt5