drag_and_drop.py 文件源码

def __init__(self):
        global _datasource

        self.name = 'Drag & Drop'

        self.width = min(ui.get_window_size()[0] * 0.8, 700)
        self.height = ui.get_window_size()[1] * 0.8

        path = editor.get_path()
        if path:
            expanded_folder = os.path.dirname(path)
            files = tab.get_paths()
        else:
            expanded_folder = None
            files = None

        root_node = FileNode(os.path.expanduser('~/Documents'), ignore=ignore)
        _datasource = FolderPickerDataSource(root_node, expanded_folder, files)

        tv = ui.TableView(frame=self.bounds, flex='WH')
        tv.delegate = _datasource
        tv.data_source = _datasource
        tv.allows_multiple_selection = False
        tv.allows_selection = True
        tv.allows_multiple_selection_during_editing = False
        tv.allows_selection_during_editing = False
        tv.separator_color = 'clear'
        self.add_subview(tv)

        methods = [tableView_itemsForBeginningDragSession_atIndexPath_]
        protocols = ['UITableViewDragDelegate']
        DragDelegate = create_objc_class('DragDelegate', methods=methods, protocols=protocols)
        self._drag_delegate = DragDelegate.alloc().init()

        methods = [
            tableView_canHandleDropSession_,
            tableView_dropSessionDidUpdate_withDestinationIndexPath_,
            tableView_performDropWithCoordinator_
        ]
        protocols = ['UITableViewDropDelegate']
        DropDelegate = create_objc_class('DropDelegate', methods=methods, protocols=protocols)
        self._drop_delegate = DropDelegate.alloc().init()

        tv_objc = ObjCInstance(tv)
        tv_objc.setDragDelegate_(self._drag_delegate)
        tv_objc.setDropDelegate_(self._drop_delegate)

        def handle_escape():
            self.close()

        self._handlers = [
            register_key_event_handler(UIEventKeyCode.escape, handle_escape),
            register_key_event_handler(UIEventKeyCode.dot, handle_escape,
                                       modifier=UIKeyModifier.command)
        ]