Merge pull request #453 from RobTranquillo/release

Minor enhancements on DropDown

Runtime/Scripts/Controls/ComboBox/DropDownList.cs

@@ -49,6 +49,9 @@ namespace UnityEngine.UI.Extensions
 		private GameObject _itemTemplate;
 		private bool _initialized;
 
+		private string _defaultMainButtonCaption = null;
+		private Color _defaultNormalColor;
+
 		[SerializeField]
 		private float _scrollBarWidth = 20.0f;
 		public float ScrollBarWidth
@@ -61,7 +64,6 @@ namespace UnityEngine.UI.Extensions
 			}
 		}
 
-		//    private int scrollOffset; //offset of the selected item
 		private int _selectedIndex = -1;
 
 		[SerializeField]
@@ -98,7 +100,7 @@ namespace UnityEngine.UI.Extensions
 		[System.Serializable]
 		public class ControlDisabledEvent : Events.UnityEvent<bool> { }
 
-        // fires when item is changed;
+		// fires when item changes between enabled and disabled;
 		public ControlDisabledEvent OnControlDisabled;
 
 		public void Start()
@@ -121,6 +123,9 @@ namespace UnityEngine.UI.Extensions
 				_rectTransform = GetComponent<RectTransform>();
 				_mainButton = new DropDownListButton(_rectTransform.Find("MainButton").gameObject);
 
+				_defaultMainButtonCaption = _mainButton.txt.text;
+				_defaultNormalColor = _mainButton.btn.colors.normalColor;
+
 				_overlayRT = _rectTransform.Find("Overlay").GetComponent<RectTransform>();
 				_overlayRT.gameObject.SetActive(false);
 				_scrollPanelRT = _overlayRT.Find("ScrollPanel").GetComponent<RectTransform>();
@@ -266,6 +271,24 @@ namespace UnityEngine.UI.Extensions
 			RedrawPanel();
 		}
 
+		public void ResetDropDown()
+		{
+			if (!_initialized)
+			{
+				return;
+			}
+
+			_mainButton.txt.text = _defaultMainButtonCaption;
+			for (int i = 0; i < _itemsPanelRT.childCount; i++)
+			{
+				_panelItems[i].btnImg.color = _defaultNormalColor;
+			}
+
+			_selectedIndex = -1;
+			_initialized = false;
+			Initialize();
+		}
+
 		public void ResetItems()
 		{
 			Items.Clear();
@@ -407,38 +430,63 @@ namespace UnityEngine.UI.Extensions
 		}
 
 		/// <summary>
-		/// Toggle the drop down list
+		/// Toggle the drop down list if it is active
 		/// </summary>
-		/// <param name="directClick"> whether an item was directly clicked on</param>
-		public void ToggleDropdownPanel(bool directClick)
+		/// <param name="directClick">Retained for backwards compatibility only.</param>
+		[Obsolete("DirectClick Parameter is no longer required")]
+		public void ToggleDropdownPanel(bool directClick = false)
 		{
-            if (!isActive) return;
+			ToggleDropdownPanel();
+		}		
+
+		/// <summary>
+		/// Toggle the drop down list if it is active
+		/// </summary>
+		public void ToggleDropdownPanel()
+		{
+			if (!isActive)
+			{
+				return;
+			}
 
 			_overlayRT.transform.localScale = new Vector3(1, 1, 1);
 			_scrollBarRT.transform.localScale = new Vector3(1, 1, 1);
 			_isPanelActive = !_isPanelActive;
 			_overlayRT.gameObject.SetActive(_isPanelActive);
+
 			if (_isPanelActive)
 			{
 				transform.SetAsLastSibling();
 			}
-			else if (directClick)
-			{
-				// scrollOffset = Mathf.RoundToInt(itemsPanelRT.anchoredPosition.y / _rectTransform.sizeDelta.y); 
 		}
+
+		/// <summary>
+		/// Hides the drop down panel if its visible at the moment
+		/// </summary>
+		public void HideDropDownPanel()
+		{
+			if (!_isPanelActive)
+			{
+				return;
+			}
+			
+			ToggleDropdownPanel(false);
 		}
 
 		/// <summary>
 		/// Updates the control and sets its active status, determines whether the dropdown will open ot not
+		/// and takes care of the underlying button to follow the status.
 		/// </summary>
 		/// <param name="status"></param>
 		public void SetActive(bool status)
 		{
-            if (status != isActive)
+			if (status == isActive)
 			{
-                OnControlDisabled?.Invoke(status);
+				return;
 			}
 			isActive = status;
+			OnControlDisabled?.Invoke(isActive);
+			_mainButton.btn.enabled = isActive;
 		}
 	}
 }