Update SelectionList based on Input submission

[AndyDralle]

Hey there!

Say I have a SelectionList with id = my_list and an Input field with id = my_input.

The Input takes some text as input, and I would like to update the selection of my SelectionList based on this input. Is there a way to do that?
As an example, if my SelectionList were to contain a list of names and somebody entered one of the names in the input field, the name should become checked in the list.

I've been looking into using the post_message method of my app in combination with the SelectionList.SelectedChanged() message type, but I can't quite figure out how to make this do what I want.

[ddkasa]

Hi @AndyDralle,

Something like this will work after the user presses the enter key:

from textual.app import App, ComposeResult
from textual.widgets import SelectionList, Input


class SandboxApp(App[None]):
    def compose(self) -> ComposeResult:
        yield Input()
        yield SelectionList(
            ("fizz", "fizz"),
            ("buzz", "buzz"),
            ("foo", "foo"),
        )

    def on_input_submitted(self, message: Input.Submitted) -> None:
        self.query_one(SelectionList).select(message.value)
        message.input.clear()


if __name__ == "__main__":
    SandboxApp().run()

Could validate the selection more or remove the clear method if the previous value is required after.

[AndyDralle]

That worked like a charm. Thank you!