Qt实现区分左键、右键和双击的ListWidget (PySide2)

具体代码如下

"""
Author: Mengde
Date: 2021/9/8
"""
from PySide2.QtCore import Signal, QPoint
from PySide2.QtWidgets import QListWidget
from PySide2.QtGui import QMouseEvent, Qt, QCursor


class MyListWidget(QListWidget):
    """ 自定义的 ListWidget， 区分鼠标事件中的左键单击，右键单击，以及左键双击
    """

    right_clicked = Signal()
    left_clicked = Signal()
    double_clicked = Signal()

    def __init__(self):
        super(MyListWidget, self).__init__()

    def mousePressEvent(self, event: QMouseEvent) -> None:
        if event.type() == QMouseEvent.MouseButtonPress:
            
            # 获取鼠标点击位置，指明选中的列表项
            pos = QCursor.pos() - self.mapToGlobal(QPoint(0, 0))
            self.setCurrentRow(self.indexAt(pos).row())
            
            if event.button() == Qt.RightButton:
                self.right_clicked.emit()

            elif event.button() == Qt.LeftButton:
                self.left_clicked.emit()

    def mouseDoubleClickEvent(self, event: QMouseEvent) -> None:
        
        pos = QCursor.pos() - self.mapToGlobal(QPoint(0, 0))
        self.setCurrentRow(self.indexAt(pos).row())
        
        if event.button() == Qt.MouseButton.LeftButton:
            self.double_clicked.emit()