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2c3c408 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | from __future__ import annotations
from importlib import import_module
import typing
from ..case import camel_to_snake
if typing.TYPE_CHECKING:
from ..widget import Widget
# ⚠️For any new built-in Widget we create, not only we have to add them to the following list, but also to the
# `__init__.pyi` file in this same folder - otherwise text editors and type checkers won't be able to "see" them.
__all__ = [
"Button",
"DataTable",
"DirectoryTree",
"Footer",
"Header",
"Placeholder",
"Pretty",
"Static",
"Input",
"TextLog",
"TreeControl",
"Welcome",
]
_WIDGETS_LAZY_LOADING_CACHE: dict[str, type[Widget]] = {}
# Let's decrease startup time by lazy loading our Widgets:
def __getattr__(widget_class: str) -> type[Widget]:
try:
return _WIDGETS_LAZY_LOADING_CACHE[widget_class]
except KeyError:
pass
if widget_class not in __all__:
raise ImportError(f"Package 'textual.widgets' has no class '{widget_class}'")
widget_module_path = f"._{camel_to_snake(widget_class)}"
module = import_module(widget_module_path, package="textual.widgets")
class_ = getattr(module, widget_class)
_WIDGETS_LAZY_LOADING_CACHE[widget_class] = class_
return class_
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