Referencing controls created via Repetition

[npwoods]

Is there a way to reference controls generated by repetition, like the below?

import { AboutSlint, Button, VerticalBox, ListView, LineEdit } from "std-widgets.slint";

export component Demo {
    VerticalBox {
        alignment: start;

        Button {
            text: "Focus on Lithium";
            clicked => {
                // how would I do this?
                //line-edit[2].focus();
            }
        }
        ListView {
            for text in ["Hydrogen", "Helium", "Lithium", "Beryllium"] : line-edit := LineEdit {
                text: text;
            }
        }
    }
}

[tronical]

Unfortunately we don’t have a mechanism yet to access these from outside the loop. So pushing or pulling information from the inside works, but not from the outside.

IMO we’re missing the concept of a weak reference in the language and how to deal with it when it can’t be upgraded to a strong one. We‘ve discussed an option type here, and that might be a path. As long as any attempt to reference is guarded, in the eyes of the developer.

[ogoffart]

This is not possible to reference inner control.
All i can offer is a workaround for what you are trying to achieve.
Not really pretty but does work:

import { AboutSlint, Button, VerticalBox, ListView, LineEdit } from "std-widgets.slint";

export component Demo {


    property <string> to-focus;

    VerticalBox {
        Button {
            text: "Focus on Lithium";
            clicked => {
                to-focus = "Lithium"
            }
        }
        ListView {
            for text in ["Hydrogen", "Helium", "Lithium", "Beryllium"] : line-edit := LineEdit {
                text: text;

                property <bool> should-get-focus: to-focus == text;
                changed should-get-focus => {
                    if should-get-focus {
                        self.focus();
                        to-focus = "";
                    }
                }
            }
        }
    }
}

[npwoods]

This technique is not the most beautiful thing in the world, but it is not the worst. And most importantly, it works :-)

Thanks!