PyQt QTreeView:尝试连接到selectionChanged信号

from PyQt5.QtWidgets import QApplication, QMainWindow, QTreeView
from PyQt5.QtCore import QModelIndex

def on_selection_changed(selected: QModelIndex, deselected: QModelIndex):
    # 处理选择项变化的逻辑
    if selected.isValid():
        print("选中项：", selected.data())
    if deselected.isValid():
        print("取消选中项：", deselected.data())

if __name__ == "__main__":
    app = QApplication([])
    window = QMainWindow()

    tree_view = QTreeView(window)
    tree_view.selectionModel().selectionChanged.connect(on_selection_changed)

    # 设置树视图的数据模型等

    window.show()
    app.exec_()