Make an editable Select widget

[StSav012]

In Qt, QComboBox can be switched into the editable state. There, speaking the language of textual, SelectCurrent shows an Input instead of a Static. When the Input is submitted, the Changed message gets sent.

So, that's what I'm asking for. Please make a switch to make a Select editable. If it's too hard to implement, make a separate class. But for some cases, the latter approach will lead to a code doubling for the end user.

That's what I've got so far. It's next to a carbon copy of what you've made.

class EditaleSelectCurrent(SelectCurrent):
    """Displays the currently selected option."""

    value: reactive[str] = reactive("")
    placeholder: reactive[str] = reactive("")

    def __init__(self, placeholder: str) -> None:
        """Initialize the EditaleSelectCurrent.

        Args:
            placeholder: A string to display when there is nothing selected.
        """
        super().__init__()
        self.placeholder = placeholder

    def update(self, label: RenderableType | None) -> None:
        """Update the content in the widget.

        Args:
            label: A renderable to display, or `None` for the placeholder.
        """
        self.has_value = label is not None
        self.value = label or ""

    def compose(self) -> ComposeResult:
        """Compose label and down arrow."""
        yield Input(placeholder=self.placeholder).data_bind(
            SelectCurrent.value, SelectCurrent.placeholder
        )
        yield Static("▼", classes="arrow down-arrow")
        yield Static("▲", classes="arrow up-arrow")

    def _on_input_changed(self, message: Input.Changed) -> None:
        message.stop()
        with self.query_one(Input).prevent(Input.Changed):
            self.value = message.value

Then, the Input.value should be treated as valid by Select unless it's blank and therefore is disallowed.

And Select should catch Input.Submitted messages to convert them into Select.Changed.