Mono.Cairo: Add Context.SetSourceColor(Color) convenience method

The Color property was obsoleted, but the suggested replacement
SetSourceRGBA has 4 double parameters, which can be unconvenient.

Add a SetSourceColor that takes a Cairo.Color parameter, make the Color
property use it, and update the message on the Obsolete attribute.

1 files changed, 7 insertions, 2 deletions

diff --git a/mcs/class/Mono.Cairo/Mono.Cairo/Context.cs b/mcs/class/Mono.Cairo/Mono.Cairo/Context.cs
index 84059516902..57cb86cd8b0 100644
--- a/mcs/class/Mono.Cairo/Mono.Cairo/Context.cs
+++ b/mcs/class/Mono.Cairo/Mono.Cairo/Context.cs
@@ -161,10 +161,10 @@ namespace Cairo {
 			}
 		}
 
-		[Obsolete ("Use SetSourceRGBA method")]
+		[Obsolete ("Use SetSourceColor method")]
 		public Color Color {
 			set {
-				NativeMethods.cairo_set_source_rgba (handle, value.R, value.G, value.B, value.A);
+				SetSourceColor (value);
 			}
 		}
 
@@ -337,6 +337,11 @@ namespace Cairo {
 			get { return NativeMethods.cairo_get_reference_count (handle); }
 		}
 
+		public void SetSourceColor (Color color)
+		{
+			NativeMethods.cairo_set_source_rgba (handle, color.R, color.G, color.B, color.A);
+		}
+
 		public void SetSourceRGB (double r, double g, double b)
 		{
 			NativeMethods.cairo_set_source_rgb (handle, r, g, b);