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using System;
using UnityEngine;
using System.Reflection;
using System.Collections.Generic;
namespace AdvancedInspector
{
/// <summary>
/// Changes the color of the background of an expandable item.
/// </summary>
[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Class | AttributeTargets.Struct)]
public class BackgroundAttribute : Attribute, IRuntimeAttribute<Color>
{
public delegate Color BackgroundDelegate();
public delegate Color BackgroundStaticDelegate(BackgroundAttribute background, object instance, object value);
private Color color = Color.clear;
/// <summary>
/// Give this item's background a color.
/// </summary>
public Color Color
{
get { return color; }
set { color = value; }
}
#region IRuntime Implementation
private string methodName = "";
public string MethodName
{
get { return methodName; }
set { methodName = value; }
}
public Type Template
{
get { return typeof(BackgroundDelegate); }
}
public Type TemplateStatic
{
get { return typeof(BackgroundStaticDelegate); }
}
private List<Delegate> delegates = new List<Delegate>();
public List<Delegate> Delegates
{
get { return delegates; }
set { delegates = value; }
}
public Color Invoke(int index, object instance, object value)
{
if (delegates.Count == 0 || index >= delegates.Count)
return color;
try
{
if (delegates[index].Target == null)
{
return (Color)delegates[index].DynamicInvoke(this, instance, value);
}
else
{
return (Color)delegates[index].DynamicInvoke();
}
}
catch (Exception e)
{
if (e is TargetInvocationException)
e = ((TargetInvocationException)e).InnerException;
Debug.LogError(string.Format("Invoking a method to retrieve a Background attribute failed. The exception was \"{0}\".", e.Message));
return color;
}
}
#endregion
public BackgroundAttribute(string methodName)
{
this.methodName = methodName;
}
public BackgroundAttribute(Delegate method)
{
this.delegates.Add(method);
}
public BackgroundAttribute(float r, float g, float b)
: this(r, g, b, 1) { }
public BackgroundAttribute(float r, float g, float b, float a)
{
this.color = new Color(r, g, b, a);
}
}
}
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