ComboBox reset current value if current-index < 0

[FloVanGH]

• This resets the current-value of Combobox if the current-index is < 0 or >= model.length
• Fixes [ComboBox] setting index to -1 does not clear ComboBox text #3628
• At the moment current-value is in-out, that could cases trouble because from outside you can set any string and also if it's not part of the list. I would suggest to change it to a out property in the future but it will be a breaking change.

[ogoffart]

that could cases trouble because from outside you can set any string and also if it's not part of the list.

Yeah, i think this is indeed a dangerous change. I even wonder if we do not do that sometimes.
So this would be a breaking change because when the binding is broken, the text and the value no longer adjust.

I guess this can't be fixed without the changed event.

I would suggest to change it to a out property in the future but it will be a breaking change.

Yeah, in retrospect it should have been out
Maybe we can come to a way to make the in deprecated as in out deprecated(in) property <string> value; (dummy syntax)

[ogoffart]

In particular, this would even break cargo-ui: https://github.com/slint-ui/cargo-ui/blob/10f77c902cdf9841331339558e9b685b325917ff/ui/cargo.slint#L331

[FloVanGH]

In particular, this would even break cargo-ui: https://github.com/slint-ui/cargo-ui/blob/10f77c902cdf9841331339558e9b685b325917ff/ui/cargo.slint#L331

Then without change handlers I think it'S not possible to fix this situation without breaking.