114 lines
2.8 KiB
C#
114 lines
2.8 KiB
C#
//
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// Copyright (c) 2017 Anthony Marmont. All rights reserved.
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// Licensed for use under the Unity Asset Store EULA. See https://unity3d.com/legal/as_terms for full license information.
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//
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#if UNITY_EDITOR
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#pragma warning disable
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using UnityEngine;
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namespace AssetIcons.Editors.Preferences
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{
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/// <summary>
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/// <para>A base-class for the generic wrapper object that fires events whenever its value changes.</para>
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/// </summary>
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public abstract class EventField
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{
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/// <summary>
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/// <para>Event that is fired whenever the value of this <see cref="EventField"/> changes.</para>
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/// </summary>
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public event Action OnChanged;
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/// <summary>
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/// <para>Invokes the <see cref="OnChanged"/> event.</para>
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/// </summary>
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/// <event cref="OnChanged">Fired upon calling this method.</event>
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protected void InvokeChanged()
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{
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if (OnChanged != null)
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{
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OnChanged();
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}
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}
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}
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/// <summary>
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/// <para>A generic wrapper object that fires events whenever its value changes.</para>
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/// </summary>
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/// <seealso cref="BoolEventField"/>
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/// <seealso cref="IntEventField"/>
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public class EventField<T> : EventField, ISerializationCallbackReceiver
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{
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[SerializeField]
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[DebuggerBrowsable(DebuggerBrowsableState.Never)]
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private T internalValue;
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[SerializeField]
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[DebuggerBrowsable(DebuggerBrowsableState.Never)]
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private T beforeSerialization;
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/// <summary>
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/// <para>The value that this wrapper currently represents.</para>
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/// </summary>
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/// <event cref="EventField.OnChanged">Fired whenever the value of this property change.</event>
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public T Value
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{
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get
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{
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return internalValue;
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}
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set
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{
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if (!EqualityComparer<T>.Default.Equals(internalValue, value))
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{
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internalValue = value;
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InvokeChanged();
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}
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}
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}
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/// <summary>
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/// <para>Constructs a new instance of this <see cref="EventField"/>.</para>
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/// </summary>
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public EventField()
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{
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}
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/// <summary>
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/// <para>Constructs a new instance of this <see cref="EventField"/> with a default value.</para>
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/// </summary>
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/// <param name="defaultValue">The default value for this <see cref="BoolEventField"/>.</param>
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public EventField(T defaultValue)
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{
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internalValue = defaultValue;
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}
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/// <summary>
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/// <para>Implements the Unity <see cref="ISerializationCallbackReceiver"/> interface.</para>
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/// </summary>
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public void OnAfterDeserialize()
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{
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if (!EqualityComparer<T>.Default.Equals(internalValue, beforeSerialization))
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{
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InvokeChanged();
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}
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}
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/// <summary>
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/// <para>Implements the Unity <see cref="ISerializationCallbackReceiver"/> interface.</para>
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/// </summary>
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public void OnBeforeSerialize()
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{
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beforeSerialization = internalValue;
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}
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}
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}
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#pragma warning restore
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#endif
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