Add TextArea

Ooui/TextArea.cs

@@ -0,0 +1,35 @@
+using System;
+
+namespace Ooui
+{
+    public class TextArea : Element
+    {
+        public event EventHandler Changed {
+            add => AddEventListener ("change", value);
+            remove => RemoveEventListener ("change", value);
+        }
+
+        string text = "";
+        public override string Text {
+            get => text;
+            set => SetProperty (ref text, value, "value");
+        }
+
+        int rows = 2;
+        public int Rows {
+            get => rows;
+            set => SetProperty (ref rows, value, "rows");
+        }
+
+        int cols = 2;
+        public int Columns {
+            get => cols;
+            set => SetProperty (ref cols, value, "cols");
+        }
+
+        public TextArea ()
+            : base ("textarea")
+        {
+        }
+    }
+}