When a ListItem is Selected how do I return the Label text?

[showipintbri]

Using the example ListView widget code: https://github.com/Textualize/textual/blob/main/docs/examples/widgets/list_view.py

...and this reference in the documentation https://textual.textualize.io/api/list_view/#textual.widgets._list_view.ListView.Selected

I should be able to catch the selected object:

Can be handled using on_list_view_selected in a subclass of ListView or in a parent widget in the DOM.

However, when I create a on_list_view_selected function I don't see the Label text passed. How can I access the Label text?

[davep]

A ListItem is a container widget, that can contain other widgets; in the example you point at it will contain a Label; it could, if you wanted, be any other kind of widget. The point here being that a ListItem doesn't have a label; it's just a container of other things.

If you want the ListItems of your ListView to contain widgets that also let you get a string label back, likely the best approach is to make such a widget of your own. So, taking the list_view.py example a little further:

from textual.app import App, ComposeResult
from textual.widgets import ListView, ListItem, Label, Footer

class LabelItem(ListItem):

    def __init__(self, label: str) -> None:
        super().__init__()
        self.label = label

    def compose( self ) -> ComposeResult:
        yield Label(self.label)


class ListViewExample(App):

    CSS_PATH = "list_view.css"

    def compose(self) -> ComposeResult:
        yield ListView(
            LabelItem("One"),
            LabelItem("Two"),
            LabelItem("Three"),
        )
        yield Label("Nothing chosen",id="chosen")
        yield Footer()

    def on_list_view_selected(self, event: ListView.Selected):
        self.query_one("#chosen",Label).update(event.item.label)


if __name__ == "__main__":
    app = ListViewExample()
    app.run()

[showipintbri]

@davep Thank You. Your suggestion achieves the outcome I was hoping for.

While I have adopted your suggested code, I still seek clarity on how to access the text of a child widget.

In the example:

yield ListView(
            ListItem(Label("One")),
            ListItem(Label("Two")),
            ListItem(Label("Three")),
        )

Is there another way to access the text of Label when it's a child of a child using the on_list_view_selected(self, event: ListView.Selected): handler ?

[davep]

Is there another way to access the text of Label

A Label doesn't really have "text" as such, a Label is a way of showing a Rich renderable, which may come from some text.

[stragulus]

Since this is such a common use case (wanting to get an object associated with a selected item), it would make sense to add this as standard functionality to ListItem to avoid having to always create a subclass.

[daxroc]

You can do something like

datasource = ListView(...)
ch = datasource.highlighted_child.get_child_by_type(Label)
ds_text = ch.renderable.plain