Created a single size input in Size and SizeF

src/Eto/Drawing/Size.cs

@@ -101,6 +101,17 @@ public static Size Ceiling (SizeF size)
 	/// </summary>
 	public static readonly Size MinValue = new Size (Int32.MinValue, Int32.MinValue);
 
+	/// <summary>
+	/// Initializes a new Size class with an identical width and height
+	/// </summary>
+	/// <param name="size">Initial width and height of the size</param>
+	public Size (int size)
+		: this()
+	{
+		Width = size;
+		Height = size;
+	}
+
 	/// <summary>
 	/// Initializes a new Size class with the specified width and height
 	/// </summary>
@@ -405,4 +416,4 @@ public bool Equals (Size other)
 	{
 		return other == this;
 	}
-}
+}

src/Eto/Drawing/SizeConverter.cs

@@ -39,6 +39,21 @@ public override object ConvertFrom(sc.ITypeDescriptorContext context, CultureInf
 		if (text != null)
 		{
 			string[] parts = text.Split(DimensionSplitter, StringSplitOptions.RemoveEmptyEntries);
+
+			if (parts.Length == 1)
+			{
+				try
+				{
+					return new Size(
+						int.Parse(parts[0])
+					);
+				}
+				catch
+				{
+					throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Cannot parse value '{0}' as Size. Should be a single integer", text));
+				}
+			}
+
 			if (parts.Length != 2)
 				throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Cannot parse value '{0}' as Size. Should be in the form of 'width, height'", text));
 

src/Eto/Drawing/SizeF.cs

@@ -74,7 +74,18 @@ public static SizeF Abs (SizeF size)
 	/// A SizeF with the width and height set to float.NegativeInfinity
 	/// </summary>
 	public static readonly SizeF NegativeInfinity = new SizeF (float.NegativeInfinity, float.NegativeInfinity);
-
+
+ 	/// <summary>
+	/// Initializes a new Size class with an identical width and height
+	/// </summary>
+	/// <param name="size">Initial width and height of the size</param>
+	public SizeF (float size)
+		: this()
+	{
+		Width = size;
+		Height = size;
+	}
+
 	/// <summary>
 	/// Initializes a new SizeF class with the specified width and height
 	/// </summary>
@@ -337,4 +348,4 @@ public bool Equals (SizeF other)
 	{
 		return other == this;
 	}
-}
+}

src/Eto/Drawing/SizeFConverter.cs

@@ -39,6 +39,21 @@ public override object ConvertFrom(sc.ITypeDescriptorContext context, CultureInf
 		if (text != null)
 		{
 			string[] parts = text.Split(DimensionSplitter, StringSplitOptions.RemoveEmptyEntries);
+
+			if (parts.Length == 1)
+			{
+				try
+				{
+					return new SizeF(
+						int.Parse(parts[0])
+					);
+				}
+				catch
+				{
+					throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Cannot parse value '{0}' as SizeF. Should be a single integer", text));
+				}
+			}
+
 			if (parts.Length != 2)
 				throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Cannot parse value '{0}' as SizeF. Should be in the form of 'width, height'", text));