Editor: How to do PropertyField for List elements?

Question

Hi there,

I finally got a array handling with serialized properties working, but I need the same for generic lists. It comes down to to the question of "How to access List.Count and List[dataindex] when using FindProperty()" ???

Here's my working array code so far:

 void ArrayGUI(SerializedObject obj,string name)
     {
         int no = obj.FindProperty(name + ".Array.size").intValue;
         EditorGUI.indentLevel = 3;
         int c = EditorGUILayout.IntField("Size", no);
         if (c != no)
             obj.FindProperty(name + ".Array.size").intValue = c;
 
         for (int i=0;i<no;i++) {
             var prop = obj.FindProperty(string.Format("{0}.Array.data[{1}]", name, i));
             EditorGUILayout.PropertyField(prop);
         }
     }

Thanks in advance

Jake

Answer 1

Best Answer

Answer by steinbitglis · Feb 24, 2012 at 02:04 PM

DrawDefaultInpector() does something like this:

 override def OnInspectorGUI():
     serializedObject.Update()
 
     EditorGUIUtility.LookLikeInspector()
 
     myIterator = serializedObject.FindProperty("myArrayField")
     while true:
         myRect = GUILayoutUtility.GetRect(0f, 16f)
         showChildren = EditorGUI.PropertyField(myRect, myIterator)
         break unless myIterator.NextVisible(showChildren)
 
     serializedObject.ApplyModifiedProperties()

Update:

These days it's probably better to follow Luna4Dev1's advice:

In newer versions of Unity, the PropertyField now has an IncludeChildren flag

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Jake-L · Feb 24, 2012 at 02:44 PM 0

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Thanks a lot for answering this. I don't have the time to test this in the near future, but I'll assume this will do the trick, so I'll flag this answer as correct.

Thanks mate!

termway · Jun 28, 2012 at 09:53 AM 0

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Thanks, very usefull !

I can't find this on Unity Documentation.

Luna4Dev1 · May 06, 2015 at 08:59 AM 0

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It was a bit difficult to find, but it's EditorGUILayout.PropertyField, or EditorGUI.PropertyField

http://docs.unity3d.com/ScriptReference/30_search.html?q=PropertyField

http://docs.unity3d.com/ScriptReference/EditorGUI.PropertyField.html http://docs.unity3d.com/ScriptReference/EditorGUILayout.PropertyField.html

Harinezumi · Dec 11, 2015 at 02:30 AM 0

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Thanks for the update about using the includeChildren flag, was exactly what I was looking for! :)

Glurth · Mar 25, 2016 at 05:15 PM 0

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Perhaps this was in 2012, but now(2016) in, the best answer is below by Luna4Dev1. (use showChildren flag in function parameter.)

Answer 2

Answer by Luna4Dev1 · Feb 13, 2015 at 01:23 PM

Resurrecting this old thread because I always forget the solution and it's the first hit on Google;

In newer versions of Unity, the PropertyField now has an IncludeChildren flag - simply set that to true and your PropertyField will draw arrays like the default inspector.

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nicloay · May 06, 2015 at 08:19 AM 0

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best answer =). don't know why everyone like first dirty solutions

steinbitglis · May 06, 2015 at 08:30 AM 2

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added a mention in my "first dirty solution", thx

jinoh · Dec 08, 2018 at 02:08 AM 0

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THank you so much!

Answer 3

C# version of steinbitglis answered

 public override void OnInspectorGUI()
 {
     serializedObject.Update();
     EditorGUIUtility.LookLikeInspector();
     ListIterator("myArrayField");
     serializedObject.ApplyModifiedProperties();
 }

 public void ListIterator(string listName)
     {
         //List object
         SerializedProperty listIterator = serializedObject.FindProperty(listName);
         Rect drawZone = GUILayoutUtility.GetRect(0f, 16f);
         bool showChildren = EditorGUI.PropertyField(drawZone, listIterator);
         listIterator.NextVisible(showChildren);
     
         //List size
         drawZone = GUILayoutUtility.GetRect(0f, 16f);
         showChildren = EditorGUI.PropertyField(drawZone, listIterator);
         bool toBeContinued = listIterator.NextVisible(showChildren);

         //Elements
         int listElement = 0;
         while (toBeContinued)
         {
             drawZone = GUILayoutUtility.GetRect(0f, 16f);
             showChildren = EditorGUI.PropertyField(drawZone, listIterator);
             toBeContinued = listIterator.NextVisible(showChildren);
             listElement++;
         }

}

Update : I encountered problem with expending and nested list (like Unity crash >_<)

So here a new version which work for me.

  private listVisibility = true;
 
 ...
     public override void OnInspectorGUI()
     {
         serializedObject.Update();
         EditorGUIUtility.LookLikeInspector();
         ListIterator("myArrayField", ref listVisibility);
         serializedObject.ApplyModifiedProperties();
     }
 
 
  public void ListIterator(string propertyPath, ref bool visible)
     {
         SerializedProperty listProperty = serializedObject.FindProperty(propertyPath);
         visible = EditorGUILayout.Foldout(visible, listProperty.name);
         if (visible)
         {
             EditorGUI.indentLevel++;
             for (int i = 0; i < listProperty.arraySize; i++)
             {
                 SerializedProperty elementProperty = listProperty.GetArrayElementAtIndex(i);
                 Rect drawZone = GUILayoutUtility.GetRect(0f, 16f);
                 bool showChildren = EditorGUI.PropertyField(drawZone, elementProperty); 
             }
             EditorGUI.indentLevel--;
         }
     }

Editor: How to do PropertyField for List elements?

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