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Binding.cs
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Binding.cs
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//
// Cuboid (http://github.com/arjonagelhout/cuboid)
// Copyright (c) 2023 Arjo Nagelhout
//
using System;
using System.Collections;
using System.Collections.Generic;
using Newtonsoft.Json;
using Cuboid.Models;
using UnityEngine;
namespace Cuboid
{
public interface IBinding<T>
{
public T Value { get; set; }
public Action<T> OnValueChanged { get; set; }
public void Register(Action<T> action);
public void Unregister(Action<T> action);
public void ValueChanged();
}
public interface ICanSetBinding<T> where T : new()
{
public void SetBinding(IBinding<T> binding);
}
/// <summary>
/// The StoredBinding class is an alternative to the Binding class that uses
/// <see cref="UserData"/> to store data across sessions in a json file.
///
/// T should be serializable using the Newtonsoft json library, otherwise
/// it will probably throw errors.
///
/// Similar to the Binding<T> class it allows for registering and unregistering
/// to listen to changes in its data.
///
/// Because Application.persistentDataPath is not allowed to be called from a constructor,
/// please initialize StoredBindings inside the Awake or Start methods.
///
/// </summary>
/// <typeparam name="T"></typeparam>
[Serializable]
public class StoredBinding<T> : IBinding<T>
{
private string _key;
private T _value;
public T Value
{
get => _value;
set
{
_value = value;
UserData.Set<T>(_key, _value);
OnValueChanged?.Invoke(_value);
}
}
public void Register(Action<T> action)
{
if (action != null)
{
OnValueChanged += action;
action?.Invoke(Value); // always execute a first time
}
}
public void Unregister(Action<T> action)
{
if (action != null)
{
OnValueChanged -= action;
}
}
public StoredBinding(string key, T value = default(T))
{
_key = key;
// try get the value from the user preferences, otherwise, use the supplied value in the constructor parameter value
Value = UserData.TryGetValue<T>(_key, out T storedValue) ? storedValue : value;
}
[JsonIgnore]
public Action<T> OnValueChanged { get; set; }
public void ValueChanged()
{
OnValueChanged?.Invoke(Value);
}
}
/// <summary>
/// This is to make sure strings and MonoBehaviours can also be used with Binding
/// </summary>
/// <typeparam name="T"></typeparam>
[Serializable]
public class BindingWithoutNew<T> : IBinding<T>
{
private T _value;
public T Value
{
get => _value;
set
{
_value = value;
OnValueChanged?.Invoke(_value);
}
}
public void Register(Action<T> action)
{
if (action != null)
{
OnValueChanged += action;
action?.Invoke(Value); // always execute a first time
}
}
public void Unregister(Action<T> action)
{
if (action != null)
{
OnValueChanged -= action;
}
}
public BindingWithoutNew()
{
Value = default(T);
}
public BindingWithoutNew(T value)
{
Value = value;
}
[JsonIgnore]
public Action<T> OnValueChanged { get; set; }
public void ValueChanged()
{
OnValueChanged?.Invoke(Value);
}
}
[Serializable]
public class Binding<T> : IBinding<T> where T : new()
{
private T _value;
public T Value
{
get => _value;
set
{
_value = value;
OnValueChanged?.Invoke(_value);
}
}
public void Register(Action<T> action)
{
if (action != null)
{
OnValueChanged += action;
action?.Invoke(Value); // always execute a first time
}
}
public void Unregister(Action<T> action)
{
if (action != null)
{
OnValueChanged -= action;
}
}
public Binding()
{
Value = new T();
}
public Binding(T value)
{
Value = value;
}
[JsonIgnore]
public Action<T> OnValueChanged { get; set; }
public void ValueChanged()
{
OnValueChanged?.Invoke(Value);
}
}
}