如何检查 PyQt6 中的 MouseButtonPress 事件?

How to check MouseButtonPress event in PyQt6?

在 PyQt5 中,我们可以使用 QEvent class 来验证事件的发生,例如 QEvent.MouseButtonPress。在 PyQt6 中,该语句不再有效。我检查了 PyQt6.QtCore.QEventPyQt6.QtGui.QMouseEvent class 的成员,我似乎无法找到包含 MouseButtonPress 事件值的正确枚举 class。

PyQt5 示例我正在尝试转换为 PyQt6

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtCore import QEvent, Qt

class AppDemo(QWidget):
    def __init__(self):
        super().__init__()
        self.resize(800, 400)
        self.installEventFilter(self)
        
    def eventFilter(self, QObject, event):
        if event.type() == QEvent.MouseButtonPress: # <-- No longer work in PyQt6
            if event.button() == Qt.RightButton: # <-- Becomes event.button() == Qt.MouseButtons.RightButton
                print('Right button clicked')           

        return True

if __name__ == '__main__':
    app = QApplication(sys.argv)

    demo = AppDemo()
    demo.show()

    try:
        sys.exit(app.exec_())
    except SystemExit:
        print('Closing Window...')

更新: 如果我打印 QEvent 和 QMouseEvent 的成员,这就是所有可用的成员。

print('Members of PyQt6.QtCore.QEvent')
print(dir(QEvent))
print('-'*50)
print('Members of PyQt6.QtCore.QMouseEvent')
print(dir(QMouseEvent))

>>>
Members of PyQt6.QtCore.QEvent
['Type', '__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'accept', 'clone', 'ignore', 'isAccepted', 'isInputEvent', 'isPointerEvent', 'isSinglePointEvent', 'registerEventType', 'setAccepted', 'spontaneous', 'type']
--------------------------------------------------
Members of PyQt6.QtCore.QMouseEvent
['Type', '__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'accept', 'allPointsAccepted', 'button', 'buttons', 'clone', 'device', 'deviceType', 'exclusivePointGrabber', 'globalPosition', 'ignore', 'isAccepted', 'isBeginEvent', 'isEndEvent', 'isInputEvent', 'isPointerEvent', 'isSinglePointEvent', 'isUpdateEvent', 'modifiers', 'point', 'pointById', 'pointCount', 'pointerType', 'pointingDevice', 'points', 'position', 'registerEventType', 'scenePosition', 'setAccepted', 'setExclusivePointGrabber', 'spontaneous', 'timestamp', 'type']

PyQt6 枚举使用 python 枚举的主要变化之一,因此您必须使用枚举名称作为中介,在您的情况下,MouseButtonPress 属于 Type 枚举,RightButton 属于 MouseButtons,因此您必须将其更改为:

def eventFilter(self, QObject, event):
    if event.type() == QEvent.<b>Type</b>.MouseButtonPress:
        if event.button() == Qt.<b>MouseButtons</b>.RightButton:
            print("Right button clicked")

    return True