简单的UI，可使用PySide2在位置之间复制文件

Question

我是Python的新手，它试图构建一个UI在Maya的两个位置之间复制文件，这是在两个文件夹结构列表之间的简单拖放。我尝试从网上复制示例代码以使其起作用，但是除了显示UI之外，它无法做任何事情。

from PySide2 import QtWidgets, QtCore

class dirTreeView(QtWidgets.QTreeView):
    def __init__(self, parent=None):
        super(dirTreeView, self).__init__(parent)
        self.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
        self.setDragDropMode(QtWidgets.QAbstractItemView.DragDrop)
        self.setDropIndicatorShown(True)

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(QtCore.Qt.CopyAction)
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls():
            event.setDropAction(QtCore.Qt.CopyAction)
            event.proposedAction()
            links = []
            for url in event.mimeData().urls():
                links.append(str(url.toLocalFile()))
            self.emit(QtCore.SIGNAL("accepted()"), links)
        else:
            event.ignore()

window = QtWidgets.QWidget()
layout = QtWidgets.QGridLayout()
srcDataModel = QtWidgets.QFileSystemModel()
srcDataModel.setRootPath(QtCore.QDir.currentPath())#will have src path
srcModel = dirTreeView()
srcModel.setModel(srcDataModel)
srcDataModel.setRootPath(QtCore.QDir.currentPath())#will have des path
desModel = dirTreeView()
desModel.setModel(srcDataModel)
layout.addWidget(srcModel, 0, 0)
layout.addWidget(desModel, 0, 1)
window.setLayout(layout)
window.show()

只需要通过拖放操作在两个位置之间复制文件，