/// <summary>
    /// Convert the specified list of delegate entries into a string array.
    /// </summary>

    static public string[] GetNames(List <Entry> list, string choice, out int index)
    {
        index = 0;
        string[] names = new string[list.Count + 1];
        names[0] = string.IsNullOrEmpty(choice) ? "<Choose>" : choice;

        for (int i = 0; i < list.Count;)
        {
            Entry  ent = list[i];
            string del = UGUITools.GetFuncName(ent.target, ent.name);
            names[++i] = del;
            if (index == 0 && string.Equals(del, choice))
            {
                index = i;
            }
        }
        return(names);
    }
    /// <summary>
    /// Draw an editor field for the Unity Delegate.
    /// </summary>

    static public bool Field(Object undoObject, EventDelegate del, bool removeButton, bool minimalistic)
    {
        if (del == null)
        {
            return(false);
        }
        bool prev = GUI.changed;

        GUI.changed = false;
        bool          retVal = false;
        MonoBehaviour target = del.target;
        bool          remove = false;

        if (removeButton && (del.target != null || del.isValid))
        {
            if (!minimalistic)
            {
                UGUIEditorTools.SetLabelWidth(82f);
            }

            if (del.target == null && del.isValid)
            {
                EditorGUILayout.LabelField("Notify", del.ToString());
            }
            else
            {
                target = EditorGUILayout.ObjectField("Notify", del.target, typeof(MonoBehaviour), true) as MonoBehaviour;
            }

            GUILayout.Space(-18f);
            GUILayout.BeginHorizontal();
            GUILayout.Space(70f);

            if (GUILayout.Button("", "ToggleMixed", GUILayout.Width(20f), GUILayout.Height(16f)))
            {
                target = null;
                remove = true;
            }
            GUILayout.EndHorizontal();
        }
        else
        {
            target = EditorGUILayout.ObjectField("Notify", del.target, typeof(MonoBehaviour), true) as MonoBehaviour;
        }

        if (remove)
        {
            UGUIEditorTools.RegisterUndo("Delegate Selection", undoObject);
            del.Clear();
            EditorUtility.SetDirty(undoObject);
        }
        else if (del.target != target)
        {
            UGUIEditorTools.RegisterUndo("Delegate Selection", undoObject);
            del.target = target;
            EditorUtility.SetDirty(undoObject);
        }

        if (del.target != null && del.target.gameObject != null)
        {
            GameObject   go   = del.target.gameObject;
            List <Entry> list = GetMethods(go);

            int      index  = 0;
            string[] names  = PropertyReferenceDrawer.GetNames(list, del.ToString(), out index);
            int      choice = 0;

            GUILayout.BeginHorizontal();
            choice = EditorGUILayout.Popup("Method", index, names);
            UGUIEditorTools.DrawPadding();
            GUILayout.EndHorizontal();

            if (choice > 0 && choice != index)
            {
                Entry entry = list[choice - 1];
                UGUIEditorTools.RegisterUndo("Delegate Selection", undoObject);
                del.target     = entry.target as MonoBehaviour;
                del.methodName = entry.name;
                EditorUtility.SetDirty(undoObject);
                retVal = true;
            }

            GUI.changed = false;
            EventDelegate.Parameter[] ps = del.parameters;

            if (ps != null)
            {
                for (int i = 0; i < ps.Length; ++i)
                {
                    EventDelegate.Parameter param = ps[i];
                    Object obj = EditorGUILayout.ObjectField("   Arg " + i, param.obj, typeof(Object), true);

                    if (GUI.changed)
                    {
                        GUI.changed = false;
                        param.obj   = obj;
                        EditorUtility.SetDirty(undoObject);
                    }

                    if (obj == null)
                    {
                        continue;
                    }

                    GameObject  selGO = null;
                    System.Type type  = obj.GetType();
                    if (type == typeof(GameObject))
                    {
                        selGO = obj as GameObject;
                    }
                    else if (type.IsSubclassOf(typeof(Component)))
                    {
                        selGO = (obj as Component).gameObject;
                    }

                    if (selGO != null)
                    {
                        // Parameters must be exact -- they can't be converted like property bindings
                        PropertyReferenceDrawer.filter     = param.expectedType;
                        PropertyReferenceDrawer.canConvert = false;
                        List <PropertyReferenceDrawer.Entry> ents = PropertyReferenceDrawer.GetProperties(selGO, true, false);

                        int      selection;
                        string[] props = GetNames(ents, UGUITools.GetFuncName(param.obj, param.field), out selection);

                        GUILayout.BeginHorizontal();
                        int newSel = EditorGUILayout.Popup(" ", selection, props);
                        UGUIEditorTools.DrawPadding();
                        GUILayout.EndHorizontal();

                        if (GUI.changed)
                        {
                            GUI.changed = false;

                            if (newSel == 0)
                            {
                                param.obj   = selGO;
                                param.field = null;
                            }
                            else
                            {
                                param.obj   = ents[newSel - 1].target;
                                param.field = ents[newSel - 1].name;
                            }
                            EditorUtility.SetDirty(undoObject);
                        }
                    }
                    else if (!string.IsNullOrEmpty(param.field))
                    {
                        param.field = null;
                        EditorUtility.SetDirty(undoObject);
                    }

                    PropertyReferenceDrawer.filter     = typeof(void);
                    PropertyReferenceDrawer.canConvert = true;
                }
            }
        }
        else
        {
            retVal = GUI.changed;
        }
        GUI.changed = prev;
        return(retVal);
    }