Collection as PersistentVariables

Unity Engine
, ,
1

Is there a pre-defined PersistentVariables variable for collection (list, array, anything serializable) of objects?

Specifically I need an array of LocalizedString passed to other LocalizedString with refresh event calling when any children LocalizedString triggers change for any reason.

2

No but you can create one. You need to implement [IVariable](http://implement Interface IVariable | Localization | 1.2.1) and IVariableGroup.

It took a little playing around but I managed to get something that works:
You can add this to a group or as a local variable.

[DisplayName("LocalizedString Array")]
public class LocalizedStringArray : IVariableGroup, IVariable
{
    public List<LocalizedString> localizedStrings = new List<LocalizedString>();

    public object GetSourceValue(ISelectorInfo selector) => this;

    public bool TryGetValue(string key, out IVariable value)
    {
        value = localizedStrings[int.Parse(key)];
        return true;
    }
}

Usage is like this
7976004--1023594--upload_2022-3-18_22-51-29.png

7976004--1023597--upload_2022-3-18_22-51-49.png

7976004--1023600--upload_2022-3-18_22-52-2.png

1 Like
3

This is nice! I will try it later on, but I may have a problem here - will the smart formatter recognize such structure as array (ie, can I use list formatter on such data?)

4

Ah no you won’t be able to use the list formatter.
You could return a list of strings in GetSourceValue. You would only need the IVariable Part then, no need for group. I dont think it would trigger the update if the child was updated though.
I’ll.try and take a closer look Monday to see how we could make it work with a list.

1 Like
5

Thank you, let us check this at Monday then :slight_smile:

6

Okay, I managed to workarounded this by facading list:

Here is entire component, to be put into ListVariable.cs . It is not meant as roboust solution, more like temporary workaround :slight_smile:

(License is either PublicDomain or DoWTFyou want if your country does not support PublicDomain)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.Localization;
using UnityEngine.Localization.SmartFormat.Core.Extensions;
using UnityEngine.Localization.SmartFormat.PersistentVariables;

[Serializable]
public abstract class ListVariable<T> : IList<T>, IReadOnlyList<T>, IVariable, IVariableValueChanged where T : IVariableValueChanged, IVariable
{
    public event Action<IVariable> ValueChanged;

    [SerializeField]
    private List<T> _listField;

    private List<T> _list => _listField ?? (_listField = new List<T>());

    public object GetSourceValue(ISelectorInfo selector)
    {
        return _list.Select(x => x.GetSourceValue(selector));
    }

    public int Count => _list.Count;

    public bool IsReadOnly => false;

    public bool IsFixedSize => false;

    public bool IsSynchronized => false;

    public object SyncRoot => _list;

    public T this[int index]
    {
        get => _list[index];
        set
        {
            _list[index] = value;
            ValueChanged?.Invoke(this);
        }
    }
    private void Item_ValueChanged(IVariable obj)
    {
        ValueChanged?.Invoke(this);
    }


    public int IndexOf(T item)
    {
        return _list.IndexOf(item);
    }

    public void Insert(int index, T item)
    {
        item.ValueChanged += Item_ValueChanged;
        _list.Insert(index, item);
        ValueChanged?.Invoke(this);
    }

    public void RemoveAt(int index)
    {
        _list[index].ValueChanged -= Item_ValueChanged;
        _list.RemoveAt(index);
        ValueChanged?.Invoke(this);
    }

    public void Add(T item)
    {
        item.ValueChanged += Item_ValueChanged;
        _list.Add(item);
        ValueChanged?.Invoke(this);
    }

    public void Clear()
    {
        foreach (var item in _list)
        {
            item.ValueChanged -= Item_ValueChanged;
        }
        _list.Clear();
        ValueChanged?.Invoke(this);
    }

    public bool Contains(T item)
    {
        return _list.Contains(item);
    }

    public void CopyTo(T[] array, int arrayIndex)
    {
        _list.CopyTo(array, arrayIndex);
    }

    public bool Remove(T item)
    {
        item.ValueChanged -= Item_ValueChanged;
        var ret = _list.Remove(item);
        if (ret)
            ValueChanged?.Invoke(this);
        return ret;
    }

    public IEnumerator<T> GetEnumerator()
    {
        return _list.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return _list.GetEnumerator();
    }
}

[DisplayName("Localized List")]
[Serializable]
public sealed class LocalizedListString : ListVariable<LocalizedString>
{

}

And here is a dirty test:

public class Example : MonoBehaviour
{
    public LocalizedString _entry;

    private LocalizedListString _list;
    public LocalizedString _item;

    private IntVariable[] _variable;

    public TMPro.TextMeshProUGUI _target;

    // Start is called before the first frame update
    void Start()
    {
        _variable = new IntVariable[3];
        _list = new LocalizedListString();

        for (int i = 0; i < 3; i++)
        {
            var item = new LocalizedString(_item.TableReference, _item.TableEntryReference);
            item.Add("value", _variable[i] = new IntVariable { Value = 0 });

            _list.Add(item);
        }
        _entry.Add("list", _list);
        _entry.StringChanged += _entry_StringChanged;
    }

    private void _entry_StringChanged(string value)
    {
        _target.text = value;
    }

    // Update is called once per frame
    void Update()
    {
        _variable[1].Value = Mathf.RoundToInt(Time.time); // Notice that I change only variable inside collection entry
    }
}

7977216--1023780--Unity_HQ5IxCBjSO.gif

1 Like
7

Ah very nice