1 files changed, 34 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/RowDefinition.cs b/Xamarin.Forms.Core/RowDefinition.cs
new file mode 100644
index 00000000..746332ea
--- /dev/null
+++ b/Xamarin.Forms.Core/RowDefinition.cs
@@ -0,0 +1,34 @@
+using System;
+
+namespace Xamarin.Forms
+{
+	public sealed class RowDefinition : BindableObject, IDefinition
+	{
+		public static readonly BindableProperty HeightProperty = BindableProperty.Create("Height", typeof(GridLength), typeof(RowDefinition), new GridLength(1, GridUnitType.Star),
+			propertyChanged: (bindable, oldValue, newValue) => ((RowDefinition)bindable).OnSizeChanged());
+
+		public RowDefinition()
+		{
+			MinimumHeight = -1;
+		}
+
+		public GridLength Height
+		{
+			get { return (GridLength)GetValue(HeightProperty); }
+			set { SetValue(HeightProperty, value); }
+		}
+
+		internal double ActualHeight { get; set; }
+
+		internal double MinimumHeight { get; set; }
+
+		public event EventHandler SizeChanged;
+
+		void OnSizeChanged()
+		{
+			EventHandler eh = SizeChanged;
+			if (eh != null)
+				eh(this, EventArgs.Empty);
+		}
+	}
+}
+\ No newline at end of file