
from traits.api import Float, Enum, Any, Property

from ..view import View

from ..item import Item

from ..editor_factory import EditorFactory

from ..basic_editor_factory import BasicEditorFactory

from .text_editor import TextEditor

from ..ui_traits import EditorStyle

from ..ui_editor import UIEditor

from ..toolkit import toolkit_object

# -------------------------------------------------------------------------
#  '_PopupEditor' class:
# -------------------------------------------------------------------------


class _PopupEditor(UIEditor):
    def init_ui(self, parent):
        """ Creates the traits UI for the editor.
        """
        return self.object.edit_traits(view=self.base_view(), parent=parent)

    def base_view(self):
        """ Returns the View that allows the popup view to be displayed.
        """
        return View(
            Item(
                self.name,
                show_label=False,
                style="readonly",
                editor=TextEditor(view=self.popup_view()),
                padding=-4,
            ),
            kind="subpanel",
        )

    def popup_view(self):
        """ Returns the popup View.
        """
        factory = self.factory
        item = Item(
            self.name,
            show_label=False,
            padding=-4,
            style=factory.style,
            height=factory.height,
            width=factory.width,
        )

        editor = factory.editor
        if editor is not None:
            if not isinstance(editor, EditorFactory):
                editor = editor()
            item.editor = editor

        return View(item, kind=factory.kind)


# -------------------------------------------------------------------------
#  'PopupEditor' class:
# -------------------------------------------------------------------------


class PopupEditor(BasicEditorFactory):

    #: The class used to construct editor objects:
    klass = Property()

    #: The kind of popup to use:
    kind = Enum("popover", "popup", "info")

    #: The editor to use for the pop-up view (can be None (use default editor),
    #: an EditorFactory instance, or a callable that returns an EditorFactory
    #: instance):
    editor = Any()

    #: The style of editor to use for the popup editor (same as Item.style):
    style = EditorStyle

    #: The height of the popup (same as Item.height):
    height = Float(-1.0)

    #: The width of the popup (same as Item.width):
    width = Float(-1.0)

    def _get_klass(self):
        """ The class used to construct editor objects.
        """
        return toolkit_object("popup_editor:_PopupEditor")
