Instead, the drag_obj should be None, since this is not a valid drag.
The previous implementation is available under the name AdvancedEditorAreaPane.
Migrating an editor from one editor_area to other requires a lot of refactoring, so sticking with this simple fix for now.
Adds a new editor to target editor_area's `editors` list and removes the same from source editor_area.
This tab width was very small initially, but became large when all tabs were closed.
* Moved FileDropHandler to more accessible place inside drop_handler.py. Now it features an `open_file` callable trait. * IDropHandler now only contains the methods `can_handle_drop` and `handle_drop` while the BaseDropHandler adds two traits `on_can_handle` and `on_handle`.
…e python objects to be sent via mimedata.