implementing label config editor

com.unity.perception/Editor/GroundTruth/IdLabelConfigEditor.cs

 using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor.UIElements;
+using UnityEditor.VersionControl;
+using UnityEngine.UIElements;
 
 namespace UnityEditor.Perception.GroundTruth
 {
-        ReorderableList m_LabelsList;
-        const float k_Margin = 5f;
+        private ListView m_LabelListView;
+        private string m_UxmlDir = "Packages/com.unity.perception/Editor/GroundTruth/Uxml/";
+        private string m_UxmlPath;
+
+        private VisualElement m_Root;
+        private IdLabelConfig m_IdLabelConig;
+        private Button m_SaveButton;
+        private Button m_AddNewLabelButton
+
+        private List<string> m_AddedLabels = new List<string>();
+        private SerializedProperty m_SerializedLabelsArray;
-            m_LabelsList = new ReorderableList(this.serializedObject, this.serializedObject.FindProperty(IdLabelConfig.labelEntriesFieldName), true, false, true, true);
-            m_LabelsList.elementHeight = EditorGUIUtility.singleLineHeight * 2 + k_Margin;
-            m_LabelsList.drawElementCallback = DrawElement;
-            m_LabelsList.onAddCallback += OnAdd;
-            m_LabelsList.onRemoveCallback += OnRemove;
-            m_LabelsList.onReorderCallbackWithDetails += OnReorder;
+            m_UxmlPath = m_UxmlDir + "LabelConfig_Main.uxml";
+            m_Root = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(m_UxmlPath).CloneTree();
+            m_LabelListView = m_Root.Q<ListView>("labels-listview");
+            m_SaveButton = m_Root.Q<Button>("save-button");
+            m_SaveButton.SetEnabled(false);
+            m_IdLabelConig = (IdLabelConfig)target;
+            m_SerializedLabelsArray = serializedObject.FindProperty(IdLabelConfig.labelEntriesFieldName);
+
-            if (autoAssign)
+            if (m_AutoAssign)
             {
                 AutoAssignIds();
                 serializedObject.ApplyModifiedProperties();
+            RefreshAddedLabels();
+            SetupLabelsListView();
-        void OnReorder(ReorderableList list, int oldIndex, int newIndex)
+        public override VisualElement CreateInspectorGUI()
+        {
+            serializedObject.Update();
+            m_IdLabelConig = (IdLabelConfig)target;
+            RefreshAddedLabels();
+            m_LabelListView.Refresh();
+            return m_Root;
+        }
+
+        void RefreshAddedLabels()
+        {
+            m_AddedLabels.Clear();
+            m_AddedLabels.AddRange( m_IdLabelConig.labelEntries.Select(entry => entry.label));
+        }
+        void SetupLabelsListView()
+        {
+            m_LabelListView.itemsSource = m_AddedLabels;
+
+            VisualElement MakeItem() =>
+                new LabelElementInLabelConfig(this, m_SerializedLabelsArray, m_LabelListView);
+
+            void BindItem(VisualElement e, int i)
+            {
+                if (e is LabelElementInLabelConfig addedLabel)
+                {
+                    addedLabel.m_IndexInList = i;
+                    addedLabel.m_LabelTextField.BindProperty(m_SerializedLabelsArray.GetArrayElementAtIndex(i).FindPropertyRelative(nameof(IdLabelEntry.label)));
+                    addedLabel.m_LabelId.text = m_IdLabelConig.labelEntries[i].id.ToString();
+                    addedLabel.UpdateMoveButtonVisibility(m_SerializedLabelsArray);
+                }
+            }
+
+            const int itemHeight = 30;
+            m_LabelListView.bindItem = BindItem;
+            m_LabelListView.makeItem = MakeItem;
+            m_LabelListView.itemHeight = itemHeight;
+            m_LabelListView.selectionType = SelectionType.Single;
+
+            m_LabelListView.RegisterCallback<AttachToPanelEvent>(evt =>
+            {
+                RefreshListViewHeight();
+            });
+
+
+        }
+
+        public void SetSaveButtonEnabled(bool enabled)
-            if (!autoAssign)
-                return;
+            m_SaveButton.SetEnabled(enabled);
+        }
-            AutoAssignIds();
+        public void RefreshListViewHeight()
+        {
+            m_LabelListView.style.minHeight = Mathf.Clamp(m_LabelListView.itemsSource.Count * m_LabelListView.itemHeight, 300, 600);
-        void OnRemove(ReorderableList list)
+        bool m_AutoAssign => serializedObject.FindProperty(nameof(IdLabelConfig.autoAssignIds)).boolValue;
+        void AutoAssignIds()
-            if (list.index != -1)
-                list.serializedProperty.DeleteArrayElementAtIndex(list.index);
+            var serializedProperty = serializedObject.FindProperty(IdLabelConfig.labelEntriesFieldName);
+            var size = serializedProperty.arraySize;
+            if (size == 0)
+                return;
-            if (autoAssign)
-                AutoAssignIds();
+            var startingLabelId  = (StartingLabelId)serializedObject.FindProperty(nameof(IdLabelConfig.startingLabelId)).enumValueIndex;
-            this.serializedObject.ApplyModifiedProperties();
-            EditorUtility.SetDirty(target);
+            var nextId = startingLabelId == StartingLabelId.One ? 1 : 0;
+            for (int i = 0; i < size; i++)
+            {
+                serializedProperty.GetArrayElementAtIndex(i).FindPropertyRelative(nameof(IdLabelEntry.id)).intValue = nextId;
+                nextId++;
+            }
-        void OnAdd(ReorderableList list)
+        void AddNewLabel(SerializedProperty serializedArray, HashSet<string> presentLabels)
-            if (list.serializedProperty.arraySize == 0)
+            if (serializedArray.arraySize == 0)
-            for (int i = 0; i < list.serializedProperty.arraySize; i++)
+            for (int i = 0; i < serializedArray.arraySize; i++)
-                var item = list.serializedProperty.GetArrayElementAtIndex(i);
+                var item = serializedArray.GetArrayElementAtIndex(i);
-            var index = list.serializedProperty.arraySize;
-            list.serializedProperty.InsertArrayElementAtIndex(index);
-            var element = list.serializedProperty.GetArrayElementAtIndex(index);
+            var index = serializedArray.arraySize;
+            serializedArray.InsertArrayElementAtIndex(index);
+            var element = serializedArray.GetArrayElementAtIndex(index);
-            labelProperty.stringValue = "";
+            labelProperty.stringValue = FindNewLabelValue(presentLabels);
-            if (autoAssign)
-                AutoAssignIds();
+            // if (m_AutoAssign)
+            //     AutoAssignIds();
-            EditorUtility.SetDirty(target);
+            //EditorUtility.SetDirty(target);
-        void DrawElement(Rect rect, int index, bool isactive, bool isfocused)
+        string FindNewLabelValue(HashSet<string> labels)
-            var element = m_LabelsList.serializedProperty.GetArrayElementAtIndex(index);
-            var idProperty = element.FindPropertyRelative(nameof(IdLabelEntry.id));
-            var labelProperty = element.FindPropertyRelative(nameof(IdLabelEntry.label));
-            using (var change = new EditorGUI.ChangeCheckScope())
+            string baseLabel = "New Label";
+            string label = baseLabel;
+            int count = 1;
+            while (labels.Contains(label))
-                var contentRect = new Rect(rect.position, new Vector2(rect.width, EditorGUIUtility.singleLineHeight));
-                using (new EditorGUI.DisabledScope(autoAssign))
-                {
-                    var newLabel = EditorGUI.IntField(contentRect, nameof(IdLabelEntry.id), idProperty.intValue);
-                    if (change.changed)
-                    {
-                        idProperty.intValue = newLabel;
-                        if (autoAssign)
-                            AutoAssignIds();
-                    }
-                }
+                label = baseLabel + "_" + count++;
-            using (var change = new EditorGUI.ChangeCheckScope())
-            {
-                var contentRect = new Rect(rect.position + new Vector2(0, EditorGUIUtility.singleLineHeight), new Vector2(rect.width, EditorGUIUtility.singleLineHeight));
-                var newLabel = EditorGUI.TextField(contentRect, nameof(IdLabelEntry.label), labelProperty.stringValue);
-                if (change.changed)
-                {
-                    labelProperty.stringValue = newLabel;
-                }
-            }
+            return label;
+    }
-        bool autoAssign => serializedObject.FindProperty(nameof(IdLabelConfig.autoAssignIds)).boolValue;
+    class LabelElementInLabelConfig : VisualElement
+    {
+        private string m_UxmlDir = "Packages/com.unity.perception/Editor/GroundTruth/Uxml/";
+        private string m_UxmlPath;
+        private Button m_RemoveButton;
+        private Button m_MoveUpButton;
+        private Button m_MoveDownButton;
+
+        public TextField m_LabelTextField;
+        public Label m_LabelId;
+        public int m_IndexInList;
-        public override void OnInspectorGUI()
+
+        public LabelElementInLabelConfig(IdLabelConfigEditor editor, SerializedProperty labelsArray, ListView labelsListView)
-            serializedObject.Update();
-            var autoAssignIdsProperty = serializedObject.FindProperty(nameof(IdLabelConfig.autoAssignIds));
-            using (var change = new EditorGUI.ChangeCheckScope())
+            m_UxmlPath = m_UxmlDir + "LabelElementInLabelConfig.uxml";
+            AssetDatabase.LoadAssetAtPath<VisualTreeAsset>(m_UxmlPath).CloneTree(this);
+            m_LabelTextField = this.Q<TextField>("label-value");
+            m_RemoveButton = this.Q<Button>("remove-button");
+            m_MoveUpButton = this.Q<Button>("move-up-button");
+            m_MoveDownButton = this.Q<Button>("move-down-button");
+            m_LabelId = this.Q<Label>("label-id-value");
+
+
+            m_MoveDownButton.clicked += () =>
-                EditorGUILayout.PropertyField(autoAssignIdsProperty, new GUIContent("Auto Assign IDs"));
-                if (change.changed && autoAssignIdsProperty.boolValue)
-                    AutoAssignIds();
-            }
+                if (m_IndexInList < labelsArray.arraySize - 1)
+                {
+                    var currentProperty =
+                        labelsArray.GetArrayElementAtIndex(m_IndexInList).FindPropertyRelative(nameof(IdLabelEntry.label));
+                    var bottomProperty = labelsArray.GetArrayElementAtIndex(m_IndexInList + 1)
+                        .FindPropertyRelative("label");
+
+                    var tmpString = bottomProperty.stringValue;
+                    bottomProperty.stringValue = currentProperty.stringValue;
+                    currentProperty.stringValue = tmpString;
+
+                    m_IndexInList++;
+                    labelsListView.SetSelection(m_IndexInList);
+                    UpdateMoveButtonVisibility(labelsArray);
+
+                    editor.serializedObject.ApplyModifiedProperties();
-            if (autoAssignIdsProperty.boolValue)
+                    labelsListView.Refresh();
+                    editor.RefreshListViewHeight();
+                    //AssetDatabase.SaveAssets();
+                }
+            };
+
+
+            m_MoveUpButton.clicked += () =>
-                using (var change = new EditorGUI.ChangeCheckScope())
+                if (m_IndexInList > 0)
-                    var startingLabelIdProperty = serializedObject.FindProperty(nameof(IdLabelConfig.startingLabelId));
-                    EditorGUILayout.PropertyField(startingLabelIdProperty, new GUIContent("Starting Label ID"));
-                    if (change.changed)
-                        AutoAssignIds();
+                    var currentProperty =
+                        labelsArray.GetArrayElementAtIndex(m_IndexInList).FindPropertyRelative(nameof(IdLabelEntry.label));
+                    var topProperty = labelsArray.GetArrayElementAtIndex(m_IndexInList - 1)
+                        .FindPropertyRelative("label");
+
+                    var tmpString = topProperty.stringValue;
+                    topProperty.stringValue = currentProperty.stringValue;
+                    currentProperty.stringValue = tmpString;
+
+                    m_IndexInList--;
+                    labelsListView.SetSelection(m_IndexInList);
+                    UpdateMoveButtonVisibility(labelsArray);
+
+                    editor.serializedObject.ApplyModifiedProperties();
+
+                    labelsListView.Refresh();
+                    editor.RefreshListViewHeight();
+                    //AssetDatabase.SaveAssets();
-            }
+            };
-            m_LabelsList.DoLayoutList();
-            this.serializedObject.ApplyModifiedProperties();
-        }
+            m_LabelTextField.RegisterValueChangedCallback<string>((cEvent) =>
+            {
+                editor.SetSaveButtonEnabled(EditorUtility.IsDirty(editor.target));
+            });
-        void AutoAssignIds()
-        {
-            var serializedProperty = serializedObject.FindProperty(IdLabelConfig.labelEntriesFieldName);
-            var size = serializedProperty.arraySize;
-            if (size == 0)
-                return;
+            m_RemoveButton.clicked += () =>
+            {
-            var startingLabelId  = (StartingLabelId)serializedObject.FindProperty(nameof(IdLabelConfig.startingLabelId)).enumValueIndex;
+            };
+        }
-            var nextId = startingLabelId == StartingLabelId.One ? 1 : 0;
-            for (int i = 0; i < size; i++)
-            {
-                serializedProperty.GetArrayElementAtIndex(i).FindPropertyRelative(nameof(IdLabelEntry.id)).intValue = nextId;
-                nextId++;
-            }
+        public void UpdateMoveButtonVisibility(SerializedProperty labelsArray)
+        {
+            m_MoveDownButton.visible = m_IndexInList != labelsArray.arraySize - 1;
+            m_MoveUpButton.visible = m_IndexInList != 0;
         }
     }
 }

com.unity.perception/Editor/GroundTruth/IdLabelConfigEditor.cs.meta

 fileFormatVersion: 2
-guid: 910dd3186e1c4fad8eb6aca9b9ee0f48
+guid: 43cb2a3117353435abe59ca5217974a8
 timeCreated: 1585940009

com.unity.perception/Editor/GroundTruth/LabelingEditor.cs

         private List<string> m_SuggestedLabelsBasedOnName = new List<string>();
         private List<string> m_SuggestedLabelsBasedOnPath = new List<string>();
 
-        private Dictionary<int, int> m_CommonsIndexToLabelsIndex = new Dictionary<int, int>();
         private List<string> m_CommonLabels = new List<string>(); //labels that are common between all selected Labeling objects (for multi editing)
 
         public List<string> CommonLabels => m_CommonLabels;
             }
 
             RemoveAddedLabelsFromSuggestedLists();
-
             //Debug.Log("list update, source list count is:" + m_SuggestedLabelsBasedOnPath.Count);
         }
 
             {
                 m_CommonLabels = m_CommonLabels.Intersect(((Labeling) obj).labels).ToList();
             }
-            Debug.Log("-----------------------------");
-            Debug.Log("common labels count: " + m_CommonLabels.Count);
-
-
-
-            m_CommonsIndexToLabelsIndex.Clear();
-            for (int i = 0; i < m_Labeling.labels.Count; i++)
-            {
-                string label = m_Labeling.labels[i];
-
-                for (int j = 0; j < m_CommonLabels.Count; j++)
-                {
-                    string label2 = m_CommonLabels[j];
-
-                    if (String.Equals(label, label2) && !m_CommonsIndexToLabelsIndex.ContainsKey(j))
-                    {
-                        m_CommonsIndexToLabelsIndex.Add(j, i);
-                    }
-                }
-            }
-            Debug.Log("dict labels count: " + m_CommonsIndexToLabelsIndex.Count);
-
-            // if (m_CommonLabels.Count > 0 && serializedObject.targetObjects.Length > 1)
-            // {
-            //     foreach (var VARIABLE in m_CommonLabels)
-            //     {
-            //         Debug.Log(VARIABLE);
-            //     }
-            // }
-        }
-
-        //to know which index in the asset
-        Dictionary<int, int> CreateCommonLabelsToAssetsLabelsIndex()
-        {
-            return null;
         }
 
         void SetupCurrentLabelsListView()
                 if (e is AddedLabelEditor addedLabel)
                 {
                     addedLabel.m_IndexInList = i;
-                    addedLabel.m_LabelTextField.value = m_SerializedLabelsArray.GetArrayElementAtIndex(m_CommonsIndexToLabelsIndex[i]).stringValue;
+                    addedLabel.m_LabelTextField.value = m_CommonLabels[i];
                 }
             }
 
             m_CurrentLabelsListView.itemsSource = m_CommonLabels;
             m_CurrentLabelsListView.selectionType = SelectionType.None;
 
-            //m_CurrentLabelsListView.reorderable = true;
-            //m_CurrentLabelsListView.selectionType = SelectionType.Multiple;
+
+            // #if UNITY_2020_1_OR_NEWER
+            // m_CurrentLabelsListView.selectionType = SelectionType.Single;
+            // m_CurrentLabelsListView.reorderable = true;
+            // m_CurrentLabelsListView.RegisterCallback<DragPerformEvent>(evt =>
+            // {
+            //
+            // });
+            // #endif
         }
 
         void SetupSuggestedLabelsListViews()
 
             m_LabelTextField.isDelayed = true;
 
-            //The listview of added labels in the editor is only bound to the top target object, se we need to apply label modifications to other selected objects too
+
             m_LabelTextField.RegisterValueChangedCallback<string>((cEvent) =>
             {
                 foreach (var targetObject in editor.targets)

com.unity.perception/Editor/GroundTruth/Uss/Styles.uss

 }
 
 .labeling__added-label-value {
-    width: auto;
+    width: 40%;
     flex-grow: 1;
     color: black;
 }
     background-color: #313131;
-    border-width: 0px;
+    border-width: 0;
 }
 
 
 
 .labeling__label-listview {
     flex-grow: 1;
-    min-height: 150px;
+    min-height: 150;
     border-radius: 4px;
     margin-right: 2px;
     margin-top: 2px;
 
 .labeling__add-label-button {
     align-self: flex-end;
-    border-width: 0;
-    background-color: rgb(25, 25, 25);
+    background-color: #222222;
+    border-color: #707070;
+    border-width: 0;
     margin-right: 2px;
     margin-top: 2px;
     color: #CACACA;
     padding-top: 5px;
+    flex-grow: 1;
 }
 
 .outer-container-in-window{
 .inner-container {
     margin-top: 10px;
-    border-radius: 10px;
+    border-radius: 4px;
     border-width: 1px;
     padding: 10px;
     background-color: rgb(75, 75, 75);
 .labeling__add-to-list-button {
     align-self: flex-end;
     background-color: #505050;
-    border-width: 0px;
+    border-width: 0;
     color: #EEEEEE;
 }
 
     -unity-text-align: middle-left;
     background-color: #505050;
-    border-width: 0px;
+    border-width: 0;
     color: #EEEEEE;
 }
 
     margin: 3px;
     background-color: #272727;
 }
+
+.move-label-in-config-button{
+    background-color: #505050;
+    align-self: center;
+}
+
+.move-up{
+    background-image: resource('Packages/com.unity.perception/Editor/Icons/ChevronUpPadded.png');
+}
+
+.move-down{
+    background-image: resource('Packages/com.unity.perception/Editor/Icons/ChevronDownPadded.png');
+}
+
+.move-label-in-config-button:hover{
+    background-color: #808080;
+}
+.move-label-in-config-button:active{
+    background-color: #303030;
+}
+
+
+

com.unity.perception/Editor/GroundTruth/Uxml/AddedLabelElement.uxml

-<ui:UXML xmlns:ui="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements" xmlns="UnityEngine.UIElements" editor-extension-mode="False">
-    <ui:VisualElement class="added-label">
-        <ui:Button name="remove-button" class="labeling__remove-item-button" />
-        <ui:TextField name="label-value" class="labeling__added-label-value" />
-        <ui:Button name="add-to-config-button" text="Add to Label Config..." class="labeling__add-to-config-button" />
-    </ui:VisualElement>
-</ui:UXML>
+<UXML xmlns="UnityEngine.UIElements">
+    <VisualElement class="added-label">
+        <Button name="remove-button" class="labeling__remove-item-button" />
+        <TextField name="label-value" class="labeling__added-label-value" />
+        <Button name="add-to-config-button" text="Add to Label Config..." class="labeling__add-to-config-button" />
+    </VisualElement>
+</UXML>

com.unity.perception/Editor/GroundTruth/IdLabelConfigEditor_OLD.cs

+//#define ENABLED
+#if ENABLED
+using System;
+using Unity.Mathematics;
+using UnityEditorInternal;
+using UnityEngine;
+using UnityEngine.Perception.GroundTruth;
+
+namespace UnityEditor.Perception.GroundTruth
+{
+    [CustomEditor(typeof(IdLabelConfig))]
+    class IdLabelConfigEditor : Editor
+    {
+        ReorderableList m_LabelsList;
+        const float k_Margin = 5f;
+
+        public void OnEnable()
+        {
+            m_LabelsList = new ReorderableList(this.serializedObject,
+                this.serializedObject.FindProperty(IdLabelConfig.labelEntriesFieldName), true, false, true, true);
+            m_LabelsList.elementHeight = EditorGUIUtility.singleLineHeight * 2 + k_Margin;
+            m_LabelsList.drawElementCallback = DrawElement;
+            m_LabelsList.onAddCallback += OnAdd;
+            m_LabelsList.onRemoveCallback += OnRemove;
+            m_LabelsList.onReorderCallbackWithDetails += OnReorder;
+
+            if (autoAssign)
+            {
+                AutoAssignIds();
+                serializedObject.ApplyModifiedProperties();
+                EditorUtility.SetDirty(target);
+            }
+        }
+
+        void OnReorder(ReorderableList list, int oldIndex, int newIndex)
+        {
+            if (!autoAssign)
+                return;
+
+            AutoAssignIds();
+        }
+
+        void OnRemove(ReorderableList list)
+        {
+            if (list.index != -1)
+                list.serializedProperty.DeleteArrayElementAtIndex(list.index);
+
+            if (autoAssign)
+                AutoAssignIds();
+
+            this.serializedObject.ApplyModifiedProperties();
+            EditorUtility.SetDirty(target);
+        }
+
+        void OnAdd(ReorderableList list)
+        {
+            int maxLabel = Int32.MinValue;
+            if (list.serializedProperty.arraySize == 0)
+                maxLabel = -1;
+
+            for (int i = 0; i < list.serializedProperty.arraySize; i++)
+            {
+                var item = list.serializedProperty.GetArrayElementAtIndex(i);
+                maxLabel = math.max(maxLabel, item.FindPropertyRelative(nameof(IdLabelEntry.id)).intValue);
+            }
+            var index = list.serializedProperty.arraySize;
+            list.serializedProperty.InsertArrayElementAtIndex(index);
+            var element = list.serializedProperty.GetArrayElementAtIndex(index);
+            var idProperty = element.FindPropertyRelative(nameof(IdLabelEntry.id));
+            idProperty.intValue = maxLabel + 1;
+            var labelProperty = element.FindPropertyRelative(nameof(IdLabelEntry.label));
+            labelProperty.stringValue = "";
+
+            if (autoAssign)
+                AutoAssignIds();
+
+            serializedObject.ApplyModifiedProperties();
+            EditorUtility.SetDirty(target);
+        }
+
+        void DrawElement(Rect rect, int index, bool isactive, bool isfocused)
+        {
+            var element = m_LabelsList.serializedProperty.GetArrayElementAtIndex(index);
+            var idProperty = element.FindPropertyRelative(nameof(IdLabelEntry.id));
+            var labelProperty = element.FindPropertyRelative(nameof(IdLabelEntry.label));
+            using (var change = new EditorGUI.ChangeCheckScope())
+            {
+                var contentRect = new Rect(rect.position, new Vector2(rect.width, EditorGUIUtility.singleLineHeight));
+                using (new EditorGUI.DisabledScope(autoAssign))
+                {
+                    var newLabel = EditorGUI.IntField(contentRect, nameof(IdLabelEntry.id), idProperty.intValue);
+                    if (change.changed)
+                    {
+                        idProperty.intValue = newLabel;
+                        if (autoAssign)
+                            AutoAssignIds();
+                    }
+                }
+            }
+            using (var change = new EditorGUI.ChangeCheckScope())
+            {
+                var contentRect = new Rect(rect.position + new Vector2(0, EditorGUIUtility.singleLineHeight), new Vector2(rect.width, EditorGUIUtility.singleLineHeight));
+                var newLabel = EditorGUI.TextField(contentRect, nameof(IdLabelEntry.label), labelProperty.stringValue);
+                if (change.changed)
+                {
+                    labelProperty.stringValue = newLabel;
+                }
+            }
+        }
+
+        bool autoAssign => serializedObject.FindProperty(nameof(IdLabelConfig.autoAssignIds)).boolValue;
+
+        public override void OnInspectorGUI()
+        {
+            serializedObject.Update();
+            var autoAssignIdsProperty = serializedObject.FindProperty(nameof(IdLabelConfig.autoAssignIds));
+            using (var change = new EditorGUI.ChangeCheckScope())
+            {
+                EditorGUILayout.PropertyField(autoAssignIdsProperty, new GUIContent("Auto Assign IDs"));
+                if (change.changed && autoAssignIdsProperty.boolValue)
+                    AutoAssignIds();
+            }
+
+            if (autoAssignIdsProperty.boolValue)
+            {
+                using (var change = new EditorGUI.ChangeCheckScope())
+                {
+                    var startingLabelIdProperty = serializedObject.FindProperty(nameof(IdLabelConfig.startingLabelId));
+                    EditorGUILayout.PropertyField(startingLabelIdProperty, new GUIContent("Starting Label ID"));
+                    if (change.changed)
+                        AutoAssignIds();
+                }
+            }
+
+            m_LabelsList.DoLayoutList();
+            this.serializedObject.ApplyModifiedProperties();
+        }
+
+        void AutoAssignIds()
+        {
+            var serializedProperty = serializedObject.FindProperty(IdLabelConfig.labelEntriesFieldName);
+            var size = serializedProperty.arraySize;
+            if (size == 0)
+                return;
+
+            var startingLabelId  = (StartingLabelId)serializedObject.FindProperty(nameof(IdLabelConfig.startingLabelId)).enumValueIndex;
+
+            var nextId = startingLabelId == StartingLabelId.One ? 1 : 0;
+            for (int i = 0; i < size; i++)
+            {
+                serializedProperty.GetArrayElementAtIndex(i).FindPropertyRelative(nameof(IdLabelEntry.id)).intValue = nextId;
+                nextId++;
+            }
+        }
+    }
+}
+#endif

com.unity.perception/Editor/GroundTruth/IdLabelConfigEditor_OLD.cs.meta

+fileFormatVersion: 2
+guid: 910dd3186e1c4fad8eb6aca9b9ee0f48
+timeCreated: 1585940009

com.unity.perception/Editor/GroundTruth/Uxml/LabelConfig_Main.uxml

+<UXML xmlns="UnityEngine.UIElements">
+    <VisualElement class="outer-container" name="outer-container">
+        <Style src="../Uss/Styles.uss"/>
+        <Label text="Added Labels" name="added-labels-title" class="title-label"/>
+        <ListView name="labels-listview" class="labeling__label-listview" style="margin-top: 5px;"/>
+        <Button name="save-button" text="Save" style="display:none"/>
+        <Button name="add-label" text="Add New Label" class="labeling__add-label-button"/>
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