Updated to V1.0.0.2

--HG--
branch : develop

README.md

@@ -23,6 +23,11 @@ Control | Description | Menu Command | Component Command | Notes | Credits
 **HorizontalScrollSnap** | A pages scroll rect that can work in steps / pages, includes button support | UI / Extensions / Horizontal Scroll Snap | UI / Extensions / Horizontal Scroll Snap | | BinaryX
 **UIButton** | Improved Button control with additional events | UI / Extensions / UI Button | UI / Extensions / UI Button | | AriathTheWise
 **UIWindowBase** | A draggable Window implementation | UI / Extensions / UI Window Base | UI / Extensions / UI Window Base | | GXMark, alexzzzz, CaoMengde777, TroyDavis 
+**ComboBox** | A fixed combobox implementation for text | UI / Extensions / ComboBox | UI / Extensions / ComboBox | | Perchik
+**AutoCompleteComboBox** | A text combobox with autocomplete selection | UI / Extensions / AutoComplete ComboBox | UI / Extensions / AutoComplete ComboBox | | Perchik
+**DropDownList** | A basic drop down list with text and image support | UI / Extensions / Dropdown List | UI / Extensions / Dropdown List | | Perchik
+**BoundToolTip** | An alternate Tooltip implementation with central listener | UI / Extensions / Bound Tooltip / Tooltip | UI / Extensions / Bound Tooltip / Tooltip Item | Offset and tooltip placement needs work | Martin Sharkbomb
+ | | | UI / Extensions / Bound Tooltip / Tooltip Trigger |  | Martin Sharkbomb
 
 ## Effect components ##
 =====================
@@ -46,6 +51,7 @@ Component | Description | Component Command | Notes | Credits
 **ReturnKeyTrigger** | Does something?? | UI / Extensions / ReturnKey Trigger | | Melang, ddreaper
 **TabNavigation**  | An example Tab navigation script | UI / Extensions / Tab Navigation | | Melang, omatase
 **uGUITools** | | Menu / uGUI | | Senshi
+**FlowLayoutGroup** | A more rugged grid style layout group  | Layout / Extensions / Flow Layout Group | [Example Video](https://www.youtube.com/watch?v=tMe_3tJTZvc) | Simie
 
 
 *More to come*

Scripts/BoundTooltip.meta

@@ -0,0 +1,5 @@
+fileFormatVersion: 2
+guid: dcabbd73a79cd8c4a966e44d7f276790
+folderAsset: yes
+DefaultImporter:
+  userData: 

Scripts/BoundTooltip/BoundTooltipItem.cs

@@ -0,0 +1,56 @@
+///Credit Martin Sharkbomb
+///Sourced from - http://forum.unity3d.com/threads/tooltips.264395/#post-1957075
+
+namespace UnityEngine.UI.Extensions
+{
+    [AddComponentMenu("UI/Extensions/Bound Tooltip/Tooltip Item")]
+    public class BoundTooltipItem : MonoBehaviour
+    {
+        public bool IsActive
+        {
+            get
+            {
+                return gameObject.activeSelf;
+            }
+        }
+
+        public UnityEngine.UI.Text TooltipText;
+        public Vector3 ToolTipOffset;
+
+        void Awake()
+        {
+            instance = this;
+            if(!TooltipText) TooltipText = GetComponentInChildren<Text>();
+            HideTooltip();
+        }
+
+        public void ShowTooltip(string text, Vector3 pos)
+        {
+            if (TooltipText.text != text)
+                TooltipText.text = text;
+
+            transform.position = pos + ToolTipOffset;
+
+            gameObject.SetActive(true);
+        }
+
+        public void HideTooltip()
+        {
+            gameObject.SetActive(false);
+        }
+
+        // Standard Singleton Access
+        private static BoundTooltipItem instance;
+        public static BoundTooltipItem Instance
+        {
+            get
+            {
+                if (instance == null)
+                    instance = GameObject.FindObjectOfType<BoundTooltipItem>();
+                return instance;
+            }
+        }
+    }
+}
+
+ 

Scripts/BoundTooltip/BoundTooltipItem.cs.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 2d6f5ec6d595a31459e6942110d86aaa
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 

Scripts/BoundTooltip/BoundTooltipTrigger.cs

@@ -0,0 +1,39 @@
+///Credit Martin Sharkbomb
+///Sourced from - http://forum.unity3d.com/threads/tooltips.264395/#post-1957075
+
+using UnityEngine.EventSystems;
+
+namespace UnityEngine.UI.Extensions
+{
+    [AddComponentMenu("UI/Extensions/Bound Tooltip/Tooltip Trigger")]
+    public class BoundTooltipTrigger : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler, ISelectHandler, IDeselectHandler
+    {
+        public string text;
+
+        public void OnPointerEnter(PointerEventData eventData)
+        {
+            StartHover(new Vector3(eventData.position.x, eventData.position.y, 0f));
+        }
+        public void OnSelect(BaseEventData eventData)
+        {
+            StartHover(transform.position);
+        }
+        public void OnPointerExit(PointerEventData eventData)
+        {
+            StopHover();
+        }
+        public void OnDeselect(BaseEventData eventData)
+        {
+            StopHover();
+        }
+
+        void StartHover(Vector3 position)
+        {
+            BoundTooltipItem.Instance.ShowTooltip(text, position);
+        }
+        void StopHover()
+        {
+            BoundTooltipItem.Instance.HideTooltip();
+        }
+    }
+}

Scripts/BoundTooltip/BoundTooltipTrigger.cs.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: d4d7c934af453a9469701b72267593ec
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 

Scripts/ComboBox/AutoCompleteComboBox.cs

@@ -0,0 +1,344 @@
+///Credit perchik
+///Sourced from - http://forum.unity3d.com/threads/receive-onclick-event-and-pass-it-on-to-lower-ui-elements.293642/
+
+using System.Collections.Generic;
+using System.Linq;
+
+namespace UnityEngine.UI.Extensions
+{
+    [RequireComponent(typeof(RectTransform))]
+    [AddComponentMenu("UI/Extensions/AutoComplete ComboBox")]
+    public class AutoCompleteComboBox : MonoBehaviour
+    {
+        public Color disabledTextColor;
+        public DropDownListItem SelectedItem { get; private set; } //outside world gets to get this, not set it
+
+        public List<string> AvailableOptions;
+
+        public System.Action<int> OnSelectionChanged; // fires when selection is changed;
+
+        //private bool isInitialized = false;
+        private bool _isPanelActive = false;
+        private bool _hasDrawnOnce = false;
+
+        private InputField _mainInput;
+        private RectTransform _inputRT;
+
+
+        private RectTransform _rectTransform;
+
+        private RectTransform _overlayRT;
+        private RectTransform _scrollPanelRT;
+        private RectTransform _scrollBarRT;
+        private RectTransform _slidingAreaRT;
+        //   private RectTransform scrollHandleRT;
+        private RectTransform _itemsPanelRT;
+        private Canvas _canvas;
+        private RectTransform _canvasRT;
+
+        private ScrollRect _scrollRect;
+
+        private List<string> _panelItems; //items that will get shown in the dropdown
+        private List<string> _prunedPanelItems; //items that used to show in the dropdown
+
+        private Dictionary<string, GameObject> panelObjects;
+        
+        private GameObject itemTemplate;
+
+        public string Text { get; private set; }
+
+        [SerializeField]
+        private float _scrollBarWidth = 20.0f;
+        public float ScrollBarWidth
+        {
+            get { return _scrollBarWidth; }
+            set
+            {
+                _scrollBarWidth = value;
+                RedrawPanel();
+            }
+        }
+
+        //    private int scrollOffset; //offset of the selected item
+        private int _selectedIndex = 0;
+
+        [SerializeField]
+        private int _itemsToDisplay;
+        public int ItemsToDisplay
+        {
+            get { return _itemsToDisplay; }
+            set
+            {
+                _itemsToDisplay = value;
+                RedrawPanel();
+            }
+        }
+        
+        public void Awake()
+        {
+            Initialize();
+        }
+
+        private bool Initialize()
+        {
+            bool success = true;
+            try
+            {
+                _rectTransform = GetComponent<RectTransform>();
+                _inputRT = _rectTransform.FindChild("InputField").GetComponent<RectTransform>();
+                _mainInput = _inputRT.GetComponent<InputField>();
+
+                _overlayRT = _rectTransform.FindChild("Overlay").GetComponent<RectTransform>();
+                _overlayRT.gameObject.SetActive(false);
+
+
+                _scrollPanelRT = _overlayRT.FindChild("ScrollPanel").GetComponent<RectTransform>();
+                _scrollBarRT = _scrollPanelRT.FindChild("Scrollbar").GetComponent<RectTransform>();
+                _slidingAreaRT = _scrollBarRT.FindChild("SlidingArea").GetComponent<RectTransform>();
+                //  scrollHandleRT = slidingAreaRT.FindChild("Handle").GetComponent<RectTransform>();
+                _itemsPanelRT = _scrollPanelRT.FindChild("Items").GetComponent<RectTransform>();
+                //itemPanelLayout = itemsPanelRT.gameObject.GetComponent<LayoutGroup>();
+
+                _canvas = GetComponentInParent<Canvas>();
+                _canvasRT = _canvas.GetComponent<RectTransform>();
+
+                _scrollRect = _scrollPanelRT.GetComponent<ScrollRect>();
+                _scrollRect.scrollSensitivity = _rectTransform.sizeDelta.y / 2;
+                _scrollRect.movementType = ScrollRect.MovementType.Clamped;
+                _scrollRect.content = _itemsPanelRT;
+
+                itemTemplate = _rectTransform.FindChild("ItemTemplate").gameObject;
+                itemTemplate.SetActive(false);
+            }
+            catch (System.NullReferenceException ex)
+            {
+                Debug.LogException(ex);
+                Debug.LogError("Something is setup incorrectly with the dropdownlist component causing a Null Refernece Exception");
+                success = false;
+            }
+            panelObjects = new Dictionary<string, GameObject>();
+
+            _prunedPanelItems = new List<string>();
+            _panelItems = AvailableOptions.ToList();
+
+            RebuildPanel();
+            RedrawPanel();
+            return success;
+        }
+
+        /* currently just using items in the list instead of being able to add to it.
+        public void AddItems(params object[] list)
+        {
+            List<DropDownListItem> ddItems = new List<DropDownListItem>();
+            foreach (var obj in list)
+            {
+                if (obj is DropDownListItem)
+                {
+                    ddItems.Add((DropDownListItem)obj);
+                }
+                else if (obj is string)
+                {
+                    ddItems.Add(new DropDownListItem(caption: (string)obj));
+                }
+                else if (obj is Sprite)
+                {
+                    ddItems.Add(new DropDownListItem(image: (Sprite)obj));
+                }
+                else
+                {
+                    throw new System.Exception("Only ComboBoxItems, Strings, and Sprite types are allowed");
+                }
+            }
+            Items.AddRange(ddItems);
+            Items = Items.Distinct().ToList();//remove any duplicates
+            RebuildPanel();
+        }
+        */
+
+        /// <summary>
+        /// Rebuilds the contents of the panel in response to items being added.
+        /// </summary>
+        private void RebuildPanel()
+        {
+            //panel starts with all options
+            _panelItems.Clear();
+            foreach (string option in AvailableOptions)
+            {
+                _panelItems.Add(option.ToLower());
+            }
+            _panelItems.Sort();
+
+            _prunedPanelItems.Clear();
+            List<GameObject> itemObjs = new List<GameObject>(panelObjects.Values);
+            panelObjects.Clear();
+
+            int indx = 0;
+            while (itemObjs.Count < AvailableOptions.Count)
+            {
+                GameObject newItem = Instantiate(itemTemplate) as GameObject;
+                newItem.name = "Item " + indx;
+                newItem.transform.SetParent(_itemsPanelRT, false);
+                itemObjs.Add(newItem);
+                indx++;
+            }
+
+            for (int i = 0; i < itemObjs.Count; i++)
+            {
+                itemObjs[i].SetActive(i <= AvailableOptions.Count);
+                if (i < AvailableOptions.Count)
+                {
+                    itemObjs[i].name = "Item " + i + " " + _panelItems[i];
+                    itemObjs[i].transform.FindChild("Text").GetComponent<Text>().text = _panelItems[i]; //set the text value
+
+                    Button itemBtn = itemObjs[i].GetComponent<Button>();
+                    itemBtn.onClick.RemoveAllListeners();
+                    string textOfItem = _panelItems[i]; //has to be copied for anonymous function or it gets garbage collected away
+                    itemBtn.onClick.AddListener(() =>
+                    {
+                        OnItemClicked(textOfItem);
+                    });
+                    panelObjects[_panelItems[i]] = itemObjs[i];
+                }
+            }
+        }
+
+        /// <summary>
+        /// what happens when an item in the list is selected
+        /// </summary>
+        /// <param name="item"></param>
+        private void OnItemClicked(string item)
+        {
+            //Debug.Log("item " + item + " clicked");
+            Text = item;
+            _mainInput.text = Text;
+            ToggleDropdownPanel(true);
+        }
+
+        //private void UpdateSelected()
+        //{
+        //    SelectedItem = (_selectedIndex > -1 && _selectedIndex < Items.Count) ? Items[_selectedIndex] : null;
+        //    if (SelectedItem == null) return;
+
+        //    bool hasImage = SelectedItem.Image != null;
+        //    if (hasImage)
+        //    {
+        //        mainButton.img.sprite = SelectedItem.Image;
+        //        mainButton.img.color = Color.white;
+
+        //        //if (Interactable) mainButton.img.color = Color.white;
+        //        //else mainButton.img.color = new Color(1, 1, 1, .5f);
+        //    }
+        //    else
+        //    {
+        //        mainButton.img.sprite = null;
+        //    }
+
+        //    mainButton.txt.text = SelectedItem.Caption;
+
+        //    //update selected index color
+        //    for (int i = 0; i < itemsPanelRT.childCount; i++)
+        //    {
+        //        panelItems[i].btnImg.color = (_selectedIndex == i) ? mainButton.btn.colors.highlightedColor : new Color(0, 0, 0, 0);
+        //    }
+        //}
+
+
+        private void RedrawPanel()
+        {
+            float scrollbarWidth = _panelItems.Count > ItemsToDisplay ? _scrollBarWidth : 0f;//hide the scrollbar if there's not enough items
+            _scrollBarRT.gameObject.SetActive(_panelItems.Count > ItemsToDisplay);
+            if (!_hasDrawnOnce || _rectTransform.sizeDelta != _inputRT.sizeDelta)
+            {
+                _hasDrawnOnce = true;
+                _inputRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _rectTransform.sizeDelta.x);
+                _inputRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, _rectTransform.sizeDelta.y);
+
+                _scrollPanelRT.SetParent(transform, true);//break the scroll panel from the overlay
+                _scrollPanelRT.anchoredPosition = new Vector2(0, -_rectTransform.sizeDelta.y); //anchor it to the bottom of the button
+
+                //make the overlay fill the screen
+                _overlayRT.SetParent(_canvas.transform, false); //attach it to top level object
+                _overlayRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _canvasRT.sizeDelta.x);
+                _overlayRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, _canvasRT.sizeDelta.y);
+
+                _overlayRT.SetParent(transform, true);//reattach to this object
+                _scrollPanelRT.SetParent(_overlayRT, true); //reattach the scrollpanel to the overlay
+            }
+
+            if (_panelItems.Count < 1) return;
+
+            float dropdownHeight = _rectTransform.sizeDelta.y * Mathf.Min(_itemsToDisplay, _panelItems.Count);
+
+            _scrollPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight);
+            _scrollPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _rectTransform.sizeDelta.x);
+
+            _itemsPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _scrollPanelRT.sizeDelta.x - scrollbarWidth - 5);
+            _itemsPanelRT.anchoredPosition = new Vector2(5, 0);
+
+            _scrollBarRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, scrollbarWidth);
+            _scrollBarRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight);
+
+            _slidingAreaRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, 0);
+            _slidingAreaRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight - _scrollBarRT.sizeDelta.x);
+        }
+
+        public void OnValueChanged(string currText)
+        {
+            Text = currText;
+            PruneItems(currText);
+            RedrawPanel();
+            //Debug.Log("value changed to: " + currText);
+
+            if (_panelItems.Count == 0)
+            {
+                _isPanelActive = true;//this makes it get turned off
+                ToggleDropdownPanel(false);
+            }
+            else if (!_isPanelActive)
+            {
+                ToggleDropdownPanel(false);
+            }
+        }
+
+        /// <summary>
+        /// Toggle the drop down list
+        /// </summary>
+        /// <param name="directClick"> whether an item was directly clicked on</param>
+        public void ToggleDropdownPanel(bool directClick)
+        {
+            _isPanelActive = !_isPanelActive;
+
+            _overlayRT.gameObject.SetActive(_isPanelActive);
+            if (_isPanelActive)
+            {
+                transform.SetAsLastSibling();
+            }
+            else if (directClick)
+            {
+                // scrollOffset = Mathf.RoundToInt(itemsPanelRT.anchoredPosition.y / _rectTransform.sizeDelta.y); 
+            }
+        }
+
+        private void PruneItems(string currText)
+        {
+            List<string> notToPrune = _panelItems.Where(x => x.ToLower().Contains(currText.ToLower())).ToList();
+            List<string> toPrune = _panelItems.Except(notToPrune).ToList();
+            foreach (string key in toPrune)
+            {
+                //            Debug.Log("pruning key " + key);
+                panelObjects[key].SetActive(false);
+                _panelItems.Remove(key);
+                _prunedPanelItems.Add(key);
+            }
+
+            List<string> toAddBack = _prunedPanelItems.Where(x => x.ToLower().Contains(currText)).ToList();
+            foreach (string key in toAddBack)
+            {
+                //            Debug.Log("adding back key " + key);
+                panelObjects[key].SetActive(true);
+                _panelItems.Add(key);
+                _prunedPanelItems.Remove(key);
+            }
+        }
+    }
+}

Scripts/ComboBox/AutoCompleteComboBox.cs.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: ef22b091ebae52c47aa3e86ad9040c05
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 

Scripts/ComboBox/ComboBox.cs

@@ -39,7 +39,6 @@ namespace UnityEngine.UI.Extensions
         private ScrollRect _scrollRect;
 
         private List<string> _panelItems; //items that will get shown in the dropdown
-        private List<string> _prunedPanelItems; //items that used to show in the dropdown
 
         private Dictionary<string, GameObject> panelObjects;
         
@@ -118,7 +117,6 @@ namespace UnityEngine.UI.Extensions
             }
             panelObjects = new Dictionary<string, GameObject>();
 
-            _prunedPanelItems = new List<string>();
             _panelItems = AvailableOptions.ToList();
 
             RebuildPanel();
@@ -168,7 +166,6 @@ namespace UnityEngine.UI.Extensions
             }
             _panelItems.Sort();
 
-            _prunedPanelItems.Clear();
             List<GameObject> itemObjs = new List<GameObject>(panelObjects.Values);
             panelObjects.Clear();
 
@@ -285,7 +282,6 @@ namespace UnityEngine.UI.Extensions
         public void OnValueChanged(string currText)
         {
             Text = currText;
-            PruneItems(currText);
             RedrawPanel();
             //Debug.Log("value changed to: " + currText);
 
@@ -318,27 +314,5 @@ namespace UnityEngine.UI.Extensions
                 // scrollOffset = Mathf.RoundToInt(itemsPanelRT.anchoredPosition.y / _rectTransform.sizeDelta.y); 
             }
         }
-
-        private void PruneItems(string currText)
-        {
-            List<string> notToPrune = _panelItems.Where(x => x.ToLower().Contains(currText.ToLower())).ToList();
-            List<string> toPrune = _panelItems.Except(notToPrune).ToList();
-            foreach (string key in toPrune)
-            {
-                //            Debug.Log("pruning key " + key);
-                panelObjects[key].SetActive(false);
-                _panelItems.Remove(key);
-                _prunedPanelItems.Add(key);
-            }
-
-            List<string> toAddBack = _prunedPanelItems.Where(x => x.ToLower().Contains(currText)).ToList();
-            foreach (string key in toAddBack)
-            {
-                //            Debug.Log("adding back key " + key);
-                panelObjects[key].SetActive(true);
-                _panelItems.Add(key);
-                _prunedPanelItems.Remove(key);
-            }
-        }
     }
 }

Scripts/ComboBox/Prefabs/DropDownList.prefab.meta

@@ -1,4 +0,0 @@
-fileFormatVersion: 2
-guid: e2a3ef238d1087247ac988b1c9552363
-NativeFormatImporter:
-  userData: 

Scripts/Editor/UIExtensionsMenuOptions.cs

@@ -213,14 +213,11 @@ namespace UnityEditor.UI
         {
             GameObject horizontalScrollSnapRoot = CreateUIElementRoot("Horizontal Scroll Snap", menuCommand, s_ThickGUIElementSize);
 
-            GameObject childContent = new GameObject("Content");
+            GameObject childContent = CreateUIObject("Content", horizontalScrollSnapRoot);
-            GameObjectUtility.SetParentAndAlign(childContent, horizontalScrollSnapRoot);
 
-            GameObject childPage01 = new GameObject("Page_01");
+            GameObject childPage01 = CreateUIObject("Page_01", childContent);
-            GameObjectUtility.SetParentAndAlign(childPage01, childContent);
 
-            GameObject childText = new GameObject("Text");
+            GameObject childText = CreateUIObject("Text", childPage01);
-            GameObjectUtility.SetParentAndAlign(childText, childPage01);
 
             // Set RectTransform to stretch
             RectTransform rectTransformScrollSnapRoot = horizontalScrollSnapRoot.GetComponent<RectTransform>();
@@ -285,8 +282,7 @@ namespace UnityEditor.UI
         static public void AddUIButton(MenuCommand menuCommand)
         {
             GameObject uiButtonRoot = CreateUIElementRoot("UI Button", menuCommand, s_ThickGUIElementSize);
-            GameObject childText = new GameObject("Text");
+            GameObject childText = CreateUIObject("Text", uiButtonRoot);
-            GameObjectUtility.SetParentAndAlign(childText, uiButtonRoot);
 
             Image image = uiButtonRoot.AddComponent<Image>();
             image.sprite = AssetDatabase.GetBuiltinExtraResource<Sprite>(kStandardSpritePath);
@@ -348,6 +344,102 @@ namespace UnityEditor.UI
 
         }
 
+        [MenuItem("GameObject/UI/Extensions/AutoComplete ComboBox", false)]
+        static public void AddAutoCompleteComboBox(MenuCommand menuCommand)
+        {
+            GameObject autoCompleteComboBoxRoot = CreateUIElementRoot("AutoCompleteComboBox", menuCommand, s_ThickGUIElementSize);
+
+            //Create Template
+            GameObject itemTemplate = AddButtonAsChild(autoCompleteComboBoxRoot);
+
+            //Create Inputfield
+            GameObject inputField = AddInputFieldAsChild(autoCompleteComboBoxRoot);
+
+            //Create Overlay
+            GameObject overlay = CreateUIObject("Overlay", autoCompleteComboBoxRoot);
+            GameObject overlayScrollPanel = CreateUIObject("ScrollPanel", overlay);
+            GameObject overlayScrollPanelItems = CreateUIObject("Items", overlayScrollPanel);
+            GameObject overlayScrollPanelScrollBar = AddScrollbarAsChild(overlayScrollPanel);
+
+            //Create Arrow Button
+            GameObject arrowButton = AddButtonAsChild(autoCompleteComboBoxRoot);
+            
+            //Setup ComboBox
+            var autoCompleteComboBox = autoCompleteComboBoxRoot.AddComponent<AutoCompleteComboBox>();
+            var cbbRT = autoCompleteComboBoxRoot.GetComponent<RectTransform>();
+
+            //Setup Template
+            itemTemplate.name = "ItemTemplate";
+            var itemTemplateRT = itemTemplate.GetComponent<RectTransform>();
+            itemTemplateRT.sizeDelta = cbbRT.sizeDelta;
+            var itemTemplateButton = itemTemplate.GetComponent<Button>();
+            itemTemplateButton.transition = Selectable.Transition.None;
+            var itemTemplateLayoutElement = itemTemplate.AddComponent<LayoutElement>();
+            itemTemplateLayoutElement.minHeight = cbbRT.rect.height;
+            itemTemplate.SetActive(false);
+
+            //Setup InputField
+            var inputFieldRT = inputField.GetComponent<RectTransform>();
+            inputFieldRT.anchorMin = Vector2.zero;
+            inputFieldRT.anchorMax = Vector2.one;
+            inputFieldRT.sizeDelta = Vector2.zero;
+            Events.UnityEventTools.AddPersistentListener<string>(inputField.GetComponent<InputField>().onValueChange, new UnityEngine.Events.UnityAction<string>(autoCompleteComboBox.OnValueChanged));
+
+            //Setup Overlay
+            var overlayRT = overlay.GetComponent<RectTransform>();
+            overlayRT.anchorMin = new Vector2(0f, 1f);
+            overlayRT.anchorMax = new Vector2(0f, 1f);
+            overlayRT.sizeDelta = new Vector2(0f, 1f);
+            overlayRT.pivot = new Vector2(0f, 1f);
+            overlay.AddComponent<Image>().color = new Color(0.243f, 0.871f, 0f, 0f);
+            Events.UnityEventTools.AddBoolPersistentListener(overlay.AddComponent<Button>().onClick, new UnityEngine.Events.UnityAction<bool>(autoCompleteComboBox.ToggleDropdownPanel), true);
+            //Overlay Scroll Panel
+            var overlayScrollPanelRT = overlayScrollPanel.GetComponent<RectTransform>();
+            overlayScrollPanelRT.position += new Vector3(0, -cbbRT.sizeDelta.y, 0);
+            overlayScrollPanelRT.anchorMin = new Vector2(0f, 1f);
+            overlayScrollPanelRT.anchorMax = new Vector2(0f, 1f);
+            overlayScrollPanelRT.sizeDelta = new Vector2(cbbRT.sizeDelta.x, cbbRT.sizeDelta.y * 3);
+            overlayScrollPanelRT.pivot = new Vector2(0f, 1f);
+            overlayScrollPanel.AddComponent<Image>();
+            overlayScrollPanel.AddComponent<Mask>();
+            var scrollRect = overlayScrollPanel.AddComponent<ScrollRect>();
+            scrollRect.horizontal = false;
+            scrollRect.movementType = ScrollRect.MovementType.Clamped;
+            scrollRect.verticalScrollbar = overlayScrollPanelScrollBar.GetComponent<Scrollbar>();
+            //Overlay Items list
+            var overlayScrollPanelItemsRT = overlayScrollPanelItems.GetComponent<RectTransform>();
+            overlayScrollPanelItemsRT.position += new Vector3(5, 0, 0);
+            overlayScrollPanelItemsRT.anchorMin = new Vector2(0f, 1f);
+            overlayScrollPanelItemsRT.anchorMax = new Vector2(0f, 1f);
+            overlayScrollPanelItemsRT.sizeDelta = new Vector2(120f, 5f);
+            overlayScrollPanelItemsRT.pivot = new Vector2(0f, 1f);
+            scrollRect.content = overlayScrollPanelItemsRT;
+            var overlayScrollPanelItemsVLG = overlayScrollPanelItems.AddComponent<VerticalLayoutGroup>();
+            overlayScrollPanelItemsVLG.padding = new RectOffset(0, 0, 5, 0);
+            var overlayScrollPanelItemsFitter = overlayScrollPanelItems.AddComponent<ContentSizeFitter>();
+            overlayScrollPanelItemsFitter.verticalFit = ContentSizeFitter.FitMode.MinSize;
+            //Overlay Scrollbar
+            var overlayScrollPanelScrollbarRT = overlayScrollPanelScrollBar.GetComponent<RectTransform>();
+            overlayScrollPanelScrollbarRT.anchorMin = new Vector2(1f, 0f);
+            overlayScrollPanelScrollbarRT.anchorMax = Vector2.one;
+            overlayScrollPanelScrollbarRT.sizeDelta = new Vector2(cbbRT.sizeDelta.y, 0f);
+            overlayScrollPanelScrollbarRT.pivot = Vector2.one;
+            overlayScrollPanelScrollbarRT.GetComponent<Scrollbar>().direction = Scrollbar.Direction.BottomToTop;
+            overlayScrollPanelScrollBar.transform.GetChild(0).name = "SlidingArea";
+
+            //Arrow Button
+            arrowButton.name = "ArrowBtn";
+            var arrowButtonRT = arrowButton.GetComponent<RectTransform>();
+            arrowButtonRT.anchorMin = Vector2.one;
+            arrowButtonRT.anchorMax = Vector2.one;
+            arrowButtonRT.sizeDelta = new Vector2(cbbRT.sizeDelta.y, cbbRT.sizeDelta.y);
+            arrowButtonRT.pivot = Vector2.one;
+            Events.UnityEventTools.AddBoolPersistentListener(arrowButton.GetComponent<Button>().onClick, new UnityEngine.Events.UnityAction<bool>(autoCompleteComboBox.ToggleDropdownPanel), true);
+            arrowButton.GetComponentInChildren<Text>().text = "▼";
+
+            Selection.activeGameObject = autoCompleteComboBoxRoot;
+        }
+
         [MenuItem("GameObject/UI/Extensions/ComboBox", false)]
         static public void AddComboBox(MenuCommand menuCommand)
         {
@@ -444,6 +536,138 @@ namespace UnityEditor.UI
             Selection.activeGameObject = comboBoxRoot;
         }
 
+        [MenuItem("GameObject/UI/Extensions/DropDownList", false)]
+        static public void AddDropDownList(MenuCommand menuCommand)
+        {
+            GameObject dropDownListRoot = CreateUIElementRoot("DropDownList", menuCommand, s_ThickGUIElementSize);
+
+            //Create Template
+            GameObject itemTemplate = AddButtonAsChild(dropDownListRoot);
+            GameObject itemTemplateImage = AddImageAsChild(itemTemplate);
+            itemTemplateImage.GetComponent<Transform>().SetSiblingIndex(0);
+
+            //Create Main Button
+            GameObject mainButton = AddButtonAsChild(dropDownListRoot);
+            GameObject mainButtonImage = AddImageAsChild(mainButton);
+            mainButtonImage.GetComponent<Transform>().SetSiblingIndex(0);
+
+            //Create Overlay
+            GameObject overlay = CreateUIObject("Overlay", dropDownListRoot);
+            GameObject overlayScrollPanel = CreateUIObject("ScrollPanel", overlay);
+            GameObject overlayScrollPanelItems = CreateUIObject("Items", overlayScrollPanel);
+            GameObject overlayScrollPanelScrollBar = AddScrollbarAsChild(overlayScrollPanel);
+
+            //Create Arrow Button
+            GameObject arrowText = AddTextAsChild(dropDownListRoot);
+
+            //Setup DropDownList
+            var dropDownList = dropDownListRoot.AddComponent<DropDownList>();
+            var cbbRT = dropDownListRoot.GetComponent<RectTransform>();
+
+            //Setup Template
+            itemTemplate.name = "ItemTemplate";
+            var itemTemplateRT = itemTemplate.GetComponent<RectTransform>();
+            itemTemplateRT.sizeDelta = cbbRT.sizeDelta;
+            var itemTemplateButton = itemTemplate.GetComponent<Button>();
+            itemTemplateButton.transition = Selectable.Transition.None;
+            var itemTemplateLayoutElement = itemTemplate.AddComponent<LayoutElement>();
+            itemTemplateLayoutElement.minHeight = cbbRT.rect.height;
+            itemTemplate.SetActive(false);
+            //Item Template Image
+            var itemTemplateImageRT = itemTemplateImage.GetComponent<RectTransform>();
+            itemTemplateImageRT.anchorMin = Vector2.zero;
+            itemTemplateImageRT.anchorMax = new Vector2(0f, 1f);
+            itemTemplateImageRT.pivot = new Vector2(0f, 1f);
+            itemTemplateImageRT.sizeDelta = Vector2.one;
+            itemTemplateImageRT.offsetMin = new Vector2(4f, 4f);
+            itemTemplateImageRT.offsetMax = new Vector2(22f, -4f);
+            itemTemplateImage.GetComponent<Image>().color = new Color(0, 0, 0, 0);
+
+            //Setup Main Button
+            mainButton.name = "MainButton";
+            var mainButtonRT = mainButton.GetComponent<RectTransform>();
+            mainButtonRT.anchorMin = Vector2.zero;
+            mainButtonRT.anchorMax = Vector2.one;
+            mainButtonRT.sizeDelta = Vector2.zero;
+            Events.UnityEventTools.AddBoolPersistentListener(mainButton.GetComponent<Button>().onClick, new UnityEngine.Events.UnityAction<bool>(dropDownList.ToggleDropdownPanel), true);
+            var mainButtonText = mainButton.GetComponentInChildren<Text>();
+            mainButtonText.alignment = TextAnchor.MiddleLeft;
+            mainButtonText.text = "Select Item...";
+            var mainButtonTextRT = mainButtonText.GetComponent<RectTransform>();
+            mainButtonTextRT.anchorMin = Vector2.zero;
+            mainButtonTextRT.anchorMin = Vector2.zero;
+            mainButtonTextRT.pivot = new Vector2(0f, 1f);
+            mainButtonTextRT.offsetMin = new Vector2(10f,0f);
+            mainButtonTextRT.offsetMax = new Vector2(-4f,0f);
+            //Main Button Image
+            var mainButtonImageRT = mainButtonImage.GetComponent<RectTransform>();
+            mainButtonImageRT.anchorMin = Vector2.zero;
+            mainButtonImageRT.anchorMax = new Vector2(0f, 1f);
+            mainButtonImageRT.pivot = new Vector2(0f, 1f);
+            mainButtonImageRT.sizeDelta = Vector2.one;
+            mainButtonImageRT.offsetMin = new Vector2(4f, 4f);
+            mainButtonImageRT.offsetMax = new Vector2(22f, -4f);
+            mainButtonImageRT.GetComponent<Image>().color = new Color(1, 1, 1, 0);
+ 
+
+            //Setup Overlay
+            var overlayRT = overlay.GetComponent<RectTransform>();
+            overlayRT.anchorMin = new Vector2(0f, 1f);
+            overlayRT.anchorMax = new Vector2(0f, 1f);
+            overlayRT.sizeDelta = new Vector2(0f, 1f);
+            overlayRT.pivot = new Vector2(0f, 1f);
+            overlay.AddComponent<Image>().color = new Color(0.243f, 0.871f, 0f, 0f);
+            Events.UnityEventTools.AddBoolPersistentListener(overlay.AddComponent<Button>().onClick, new UnityEngine.Events.UnityAction<bool>(dropDownList.ToggleDropdownPanel), true);
+            //Overlay Scroll Panel
+            var overlayScrollPanelRT = overlayScrollPanel.GetComponent<RectTransform>();
+            overlayScrollPanelRT.position += new Vector3(0, -cbbRT.sizeDelta.y, 0);
+            overlayScrollPanelRT.anchorMin = new Vector2(0f, 1f);
+            overlayScrollPanelRT.anchorMax = new Vector2(0f, 1f);
+            overlayScrollPanelRT.sizeDelta = new Vector2(cbbRT.sizeDelta.x, cbbRT.sizeDelta.y * 3);
+            overlayScrollPanelRT.pivot = new Vector2(0f, 1f);
+            overlayScrollPanel.AddComponent<Image>();
+            overlayScrollPanel.AddComponent<Mask>();
+            var scrollRect = overlayScrollPanel.AddComponent<ScrollRect>();
+            scrollRect.horizontal = false;
+            scrollRect.movementType = ScrollRect.MovementType.Clamped;
+            scrollRect.verticalScrollbar = overlayScrollPanelScrollBar.GetComponent<Scrollbar>();
+            //Overlay Items list
+            var overlayScrollPanelItemsRT = overlayScrollPanelItems.GetComponent<RectTransform>();
+            overlayScrollPanelItemsRT.position += new Vector3(5, 0, 0);
+            overlayScrollPanelItemsRT.anchorMin = new Vector2(0f, 1f);
+            overlayScrollPanelItemsRT.anchorMax = new Vector2(0f, 1f);
+            overlayScrollPanelItemsRT.sizeDelta = new Vector2(120f, 5f);
+            overlayScrollPanelItemsRT.pivot = new Vector2(0f, 1f);
+            scrollRect.content = overlayScrollPanelItemsRT;
+            var overlayScrollPanelItemsVLG = overlayScrollPanelItems.AddComponent<VerticalLayoutGroup>();
+            overlayScrollPanelItemsVLG.padding = new RectOffset(0, 0, 5, 0);
+            var overlayScrollPanelItemsFitter = overlayScrollPanelItems.AddComponent<ContentSizeFitter>();
+            overlayScrollPanelItemsFitter.verticalFit = ContentSizeFitter.FitMode.MinSize;
+            //Overlay Scrollbar
+            var overlayScrollPanelScrollbarRT = overlayScrollPanelScrollBar.GetComponent<RectTransform>();
+            overlayScrollPanelScrollbarRT.anchorMin = new Vector2(1f, 0f);
+            overlayScrollPanelScrollbarRT.anchorMax = Vector2.one;
+            overlayScrollPanelScrollbarRT.sizeDelta = new Vector2(cbbRT.sizeDelta.y, 0f);
+            overlayScrollPanelScrollbarRT.pivot = Vector2.one;
+            overlayScrollPanelScrollbarRT.GetComponent<Scrollbar>().direction = Scrollbar.Direction.BottomToTop;
+            overlayScrollPanelScrollBar.transform.GetChild(0).name = "SlidingArea";
+
+            //Arrow Button
+            arrowText.name = "Arrow";
+            var arrowTextRT = arrowText.GetComponent<RectTransform>();
+            arrowTextRT.anchorMin = new Vector2(1f, 0f);
+            arrowTextRT.anchorMax = Vector2.one;
+            arrowTextRT.sizeDelta = new Vector2(cbbRT.sizeDelta.y, cbbRT.sizeDelta.y);
+            arrowTextRT.pivot = new Vector2(1f, 0.5f);
+            var arrowTextComponent = arrowText.GetComponent<Text>();
+            arrowTextComponent.text = "▼";
+            arrowTextComponent.alignment = TextAnchor.MiddleCenter;
+            var arrowTextCanvasGroup = arrowText.AddComponent<CanvasGroup>();
+            arrowTextCanvasGroup.interactable = false;
+            arrowTextCanvasGroup.blocksRaycasts = false;
+            Selection.activeGameObject = dropDownListRoot;
+        }
+
         [MenuItem("GameObject/UI/Extensions/Selection Box", false)]
         static public void AddSelectionBox(MenuCommand menuCommand)
         {
@@ -468,8 +692,7 @@ namespace UnityEditor.UI
             selectableArea.color = new Color(0.816f, 0.816f, 0.816f, 0.353f);
 
 
-            GameObject childSelectableItem = new GameObject("Selectable");
+            GameObject childSelectableItem = CreateUIObject("Selectable", go);
-            GameObjectUtility.SetParentAndAlign(childSelectableItem, go);
             childSelectableItem.AddComponent<Image>();
             childSelectableItem.AddComponent<ExampleSelectable>();
 
@@ -477,6 +700,53 @@ namespace UnityEditor.UI
             Selection.activeGameObject = go;
         }
 
+        [MenuItem("GameObject/UI/Extensions/Bound Tooltip/Tooltip", false)]
+        static public void AddBoundTooltip(MenuCommand menuCommand)
+        {
+            GameObject go = CreateUIElementRoot("Tooltip", menuCommand, s_ImageGUIElementSize);
+            var tooltip = go.AddComponent<BoundTooltipTrigger>();
+            tooltip.text = "This is my Tooltip Text";
+            var boundTooltip = go.AddComponent<Image>();
+            boundTooltip.sprite = AssetDatabase.GetBuiltinExtraResource<Sprite>(kBackgroundSpriteResourcePath); 
+
+            // if there is no ToolTipItem add one...
+            CreateToolTipItem(false, go);
+            Selection.activeGameObject = go;
+        }
+
+        private static void CreateToolTipItem(bool select)
+        {
+            CreateToolTipItem(select, null);
+        }
+
+        private static void CreateToolTipItem(bool select, GameObject parent)
+        {
+            var btti = Object.FindObjectOfType<BoundTooltipItem>();
+            if (btti == null)
+            {
+                var boundTooltipItem = CreateUIObject("ToolTipItem", parent.GetComponentInParent<Canvas>().gameObject);
+                btti = boundTooltipItem.AddComponent<BoundTooltipItem>();
+                var boundTooltipItemCanvasGroup = boundTooltipItem.AddComponent<CanvasGroup>();
+                boundTooltipItemCanvasGroup.interactable = false;
+                boundTooltipItemCanvasGroup.blocksRaycasts = false;
+                var boundTooltipItemImage = boundTooltipItem.AddComponent<Image>();
+                boundTooltipItemImage.sprite = AssetDatabase.GetBuiltinExtraResource<Sprite>(kBackgroundSpriteResourcePath); 
+                var boundTooltipItemText = CreateUIObject("Text", boundTooltipItem);
+                var boundTooltipItemTextRT = boundTooltipItemText.GetComponent<RectTransform>();
+                boundTooltipItemTextRT.anchorMin = Vector2.zero;
+                boundTooltipItemTextRT.anchorMax = Vector2.one;
+                boundTooltipItemTextRT.sizeDelta = Vector2.one;
+                var boundTooltipItemTextcomponent = boundTooltipItemText.AddComponent<Text>();
+                boundTooltipItemTextcomponent.alignment = TextAnchor.MiddleCenter;
+                Undo.RegisterCreatedObjectUndo(boundTooltipItem, "Create " + boundTooltipItem.name);
+            }
+
+            if (select && btti != null)
+            {
+                Selection.activeGameObject = btti.gameObject;
+            }
+        }
+
         #endregion
 
         #region Helper Functions
@@ -573,6 +843,15 @@ namespace UnityEditor.UI
             return go;
         }
 
+        private static GameObject AddImageAsChild(GameObject parent)
+        {
+            GameObject go = CreateUIObject("Image", parent);
+
+            go.AddComponent<Image>();
+
+            return go;
+        }
+
         private static GameObject AddButtonAsChild(GameObject parent)
         {
             GameObject buttonRoot = CreateUIObject("Button", parent);
@@ -600,6 +879,7 @@ namespace UnityEditor.UI
 
             return buttonRoot;
         }
+
         #endregion
     }
 }

Scripts/FlowLayoutGroup.cs

@@ -10,7 +10,7 @@ namespace UnityEngine.UI.Extensions
 	/// <summary>
 	/// Layout Group controller that arranges children in rows, fitting as many on a line until total width exceeds parent bounds
 	/// </summary>
-    [AddComponentMenu("UI/Extensions/Flow Layout Group")]
+	[AddComponentMenu("Layout/Extensions/Flow Layout Group")]
 	public class FlowLayoutGroup : LayoutGroup
 	{
 		public float Spacing = 0f;