pyqt，Qt Designer 界面布局子窗口可移动

# dock window project
        self.projectdock = QtWidgets.QDockWidget(self.tr("Project"), self)
        self.projectdock.setFeatures(QtWidgets.QDockWidget.DockWidgetMovable |
                                     QtWidgets.QDockWidget.DockWidgetClosable |
                                     QtWidgets.QDockWidget.DockWidgetFloatable)
        self.projectdock.setAllowedAreas(
            QtCore.Qt.LeftDockWidgetArea | QtCore.Qt.RightDockWidgetArea)
        self.projModel = QtWidgets.QFileSystemModel()
        self.projTree = QtWidgets.QTreeView()
        self.projTree.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        self.projTree.customContextMenuRequested.connect(
            self.projTree_contextmenu_handler)
        self.projTree.setModel(self.projModel)
        self.projTree.setColumnHidden(1, True)
        self.projTree.setColumnHidden(2, True)
        self.projTree.setColumnHidden(3, True)
        self.projTree.setHeaderHidden(True)
        # bind double click handler
        self.projTree.doubleClicked.connect(
            self.__tree_double_clicked_handler)
        self.projectdock.setWidget(self.projTree)
        self.projectdock.closeEvent = self.__projectdock_closeEvent_handler
        self.addDockWidget(QtCore.Qt.LeftDockWidgetArea, self.projectdock)