Unity Editor script to fill a serialized array with children of a specified GameObject

Question

I have a serialized field of 'GameObject' that I would like to have automatically filled with children of a game object I want to specify manually.

Bonus points if I can make it impossible to manually change this array on the component, but to only display it in a 'grayed out' state.

Is this operation possible? Thanks in advance.

Answer 1

Solution:

[CustomEditor( typeOf( ClassYouWantToManage ) )]
class ClassYouWantToManageEditor
{
  ClassYouWantToManage value;

  void OnEnable()
  {
   // target is the upcasted version of your managed class
   value = (ClassYouWantToManage) target;
  }

  public override void OnInspectorGUI()
  {
    // specifiedObject is the 'parent', with whos children you want to populate the array. has to be public
    if (value.specifiedObject == null)
    {
      throw new Exception ("Specified object is null");
    }

    // targetArray is the array you want to populate with children. has to be public
    // simple population alg
    value.targetArray = new GameObject[specifiedObject.transform.ChildCount];
    for (int i = 0; i < specifiedObject.transform.ChildCount; i++)
    {
      value.targetArray[ i ] = specifiedObject.transform.GetChild( i ).gameObject;
    } 
  }
}