import os.path


from pyface.tasks.api import TraitsDockPane
from traits.api import Event, File, List, Str
from traitsui.api import View, Item, FileEditor


class PythonBrowserPane(TraitsDockPane):
    """ A simple Python file browser pane.
    """

    # FileBrowserPane interface ----------------------------------------------

    # Fired when a file is double-clicked.
    activated = Event()

    # The list of wildcard filters for filenames.
    filters = List(Str, ["*.py"])

    # The currently selected file.
    selected_file = File(os.path.expanduser("~"))

    # TaskPane interface -----------------------------------------------------

    id = "example.python_browser_pane"
    name = "File Browser"

    # The view used to construct the dock pane's widget.
    view = View(
        Item(
            "selected_file",
            editor=FileEditor(
                dclick_name="activated",
                filter_name="filters",
                root_path=os.path.expanduser("~"),
            ),
            style="custom",
            show_label=False,
        ),
        resizable=True,
    )