TextArea: errorCalloutFactory

source/feathers/controls/TextArea.as

@@ -476,6 +476,11 @@ package feathers.controls
 		 */
 		public static var globalStyleProvider:IStyleProvider;
 
+		private static function defaultErrorCalloutFactory():TextCallout
+		{
+			return new TextCallout();
+		}
+
 		/**
 		 * Constructor.
 		 */
@@ -1338,6 +1343,52 @@ package feathers.controls
 			this._customPromptStyleName = value;
 			this.invalidate(INVALIDATION_FLAG_TEXT_RENDERER);
 		}
+
+		/**
+		 * @private
+		 */
+		protected var _errorCalloutFactory:Function;
+
+		/**
+		 * A function used to instantiate the error text callout. If null,
+		 * <code>new TextCallout()</code> is used instead.
+		 * The error text callout must be an instance of
+		 * <code>TextCallout</code>. This factory can be used to change
+		 * properties on the callout when it is first created. For instance, if
+		 * you are skinning Feathers components without a theme, you might use
+		 * this factory to set styles on the callout.
+		 *
+		 * <p>The factory should have the following function signature:</p>
+		 * <pre>function():TextCallout</pre>
+		 *
+		 * <p>In the following example, a custom error callout factory is passed
+		 * to the text area:</p>
+		 *
+		 * <listing version="3.0">
+		 * textArea.errorCalloutFactory = function():TextCallout
+		 * {
+		 *     return new TextCallout();
+		 * };</listing>
+		 *
+		 * @default null
+		 *
+		 * @see #errorString
+		 * @see feathers.controls.TextCallout
+		 */
+		public function get errorCalloutFactory():Function
+		{
+			return this._errorCalloutFactory;
+		}
+
+		public function set errorCalloutFactory(value:Function):void
+		{
+			if(this._errorCalloutFactory == value)
+			{
+				return;
+			}
+			this._errorCalloutFactory = value;
+			this.invalidate(INVALIDATION_FLAG_ERROR_CALLOUT_FACTORY);
+		}
 
 		/**
 		 * @private
@@ -1974,7 +2025,8 @@ package feathers.controls
 			{
 				return;
 			}
-			this.callout = new TextCallout();
+ 			var factory:Function = this._errorCalloutFactory != null ? this._errorCalloutFactory : defaultErrorCalloutFactory;
+ 			this.callout = TextCallout(factory());
 			var errorCalloutStyleName:String = this._customErrorCalloutStyleName != null ? this._customErrorCalloutStyleName : this.errorCalloutStyleName;
 			this.callout.styleNameList.add(errorCalloutStyleName);
 			this.callout.closeOnKeys = null;