Help with complex model biding Nodejs / Slint

[Arthur31]

Hello everyone,

I am experiencing an issue when updating only a sub-property of a Model.

When the model is simple, the update is successful. However, when the model is complex, I receive an error message: Error: Could not convert value to slint model: missing modelNotify property

I believe I may be making a mistake in my code.

Here is a basic example:

.js:

import * as slint from "slint-ui";

let ui = slint.loadFile("ui/app-window.slint");
let window = new ui.AppWindow();


// This is working
const origin = window.origin;
origin.array = new slint.ArrayModel(["A", "B", "C"]);
window.final = origin;


//This raise an error
// Error: Could not convert value to slint model: missing modelNotify property
const origin2 = window.origin;
origin.label = "Hello World";
window.final = origin2;

await window.run();

.slint

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

export struct TestObject {
    angle: angle,
    label: string,
    color: brush,
    array: [string],
}

export component AppWindow inherits Window {
    background: black;

    in-out property <TestObject> origin : { angle: -60deg, label: "E", color: Colors.purple, array: ["T", "E", "S", "T"] };
    in-out property <TestObject> final : { angle: 0deg, label: "O", color: Colors.white, array: [] };

    VerticalBox { 
        Rectangle {
            width: 100px;
            height: 100px;
            background: root.final.color;
        }
        VerticalBox {
            Text {
                height: 50px;
                width: 100px;
                text: root.final.label;
                color: white;
                font-size: 20px;
                horizontal-alignment: center;
                vertical-alignment: center;
            }
            for data in root.final.array: Text {
                height: 20px;
                width: 100px;
                text: data;
                color: white;
                font-size: 10px;
                horizontal-alignment: center;
                vertical-alignment: center;
                
            }
        }
     }
}

[FloVanGH]

Hi,

thank you for your report. I let a little bit more time for investigation but it looks for me like a bug.

It looks like that array: [string] internally is not converted correctly.

export struct TestObject {
    angle: angle,
    label: string,
    color: brush,
    array: [string],
}