1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using UnityEngine;
namespace AdvancedInspector
{
/// <summary>
/// Restrict an object field to a list of object define by a delegate from the owner.
/// In essence, turn any field into a drop down list of choices.
/// Attributes cannot recieve a delegate, instead you pass the name of the method.
/// The method itself is resolved when creating the field to know which instance to invoke.
/// </summary>
[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
public class RestrictAttribute : Attribute, IListAttribute, IRuntimeAttribute<IList>
{
public delegate IList RestrictDelegate();
public delegate IList RestrictStaticDelegate(RestrictAttribute restrict, object instance, object value);
private RestrictDisplay display = RestrictDisplay.DropDown;
/// <summary>
/// Should this restricted field use the toolbox instead of a drop down popup.
/// </summary>
public RestrictDisplay Display
{
get { return display; }
set { display = value; }
}
private int maxItemsPerRow = 6;
/// <summary>
/// When display is using Button, limits the number of items per row.
/// </summary>
public int MaxItemsPerRow
{
get { return maxItemsPerRow; }
set { maxItemsPerRow = value; }
}
#region IRuntime Implementation
private string methodName = "";
public string MethodName
{
get { return methodName; }
}
public Type Template
{
get { return typeof(RestrictDelegate); }
}
public Type TemplateStatic
{
get { return typeof(RestrictStaticDelegate); }
}
private List<Delegate> delegates = new List<Delegate>();
public List<Delegate> Delegates
{
get { return delegates; }
set { delegates = value; }
}
public IList Invoke(int index, object instance, object value)
{
if (delegates.Count == 0 || index >= delegates.Count)
return null;
try
{
if (delegates[index].Target == null)
{
return delegates[index].DynamicInvoke(this, instance, value) as IList;
}
else
{
return delegates[index].DynamicInvoke() as IList;
}
}
catch (Exception e)
{
if (e is TargetInvocationException)
e = ((TargetInvocationException)e).InnerException;
Debug.LogError(string.Format("Invoking a method to retrieve a Restrict attribute data failed. The exception was \"{0}\".", e.Message));
return null;
}
}
#endregion
public RestrictAttribute(string methodName)
: this(methodName, RestrictDisplay.DropDown) { }
public RestrictAttribute(string methodName, RestrictDisplay display)
{
this.methodName = methodName;
this.display = display;
}
public RestrictAttribute(Delegate method)
: this(method, RestrictDisplay.DropDown) { }
public RestrictAttribute(Delegate method, RestrictDisplay display)
{
this.delegates.Add(method);
this.display = display;
}
}
public enum RestrictDisplay
{
DropDown,
Toolbox,
Button
}
}
|
