[banshee/grid] [CairoDamageDebugger] extension method to show damage

[Aaron Bockover <abock src gnome org>]

commit 2d276b0b5c0c07c84122e72d2eb0d8f77be37279
Author: Aaron Bockover <abockover novell com>
Date:   Thu Jan 21 21:00:55 2010 -0500

    [CairoDamageDebugger] extension method to show damage
    
    Pretty lame right now, but you pass it a box and it will
    render a randomly colored line on each call to outline
    that box.

 .../Hyena.Gui/Hyena.Gui/CairoDamageDebugger.cs     |   58 ++++++++++++++++++++
 1 files changed, 58 insertions(+), 0 deletions(-)
---
diff --git a/src/Libraries/Hyena.Gui/Hyena.Gui/CairoDamageDebugger.cs b/src/Libraries/Hyena.Gui/Hyena.Gui/CairoDamageDebugger.cs
new file mode 100644
index 0000000..8f35fa1
--- /dev/null
+++ b/src/Libraries/Hyena.Gui/Hyena.Gui/CairoDamageDebugger.cs
@@ -0,0 +1,58 @@
+//
+// CairoDamageDebugger.cs
+//
+// Author:
+//   Aaron Bockover <abockover novell com>
+//
+// Copyright 2010 Novell, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using Cairo;
+
+namespace Hyena.Gui
+{
+    public static class CairoDamageDebugger
+    {
+        private static Random rand = new Random ();
+
+        public static void RenderDamage (this Context cr, Gdk.Rectangle damage)
+        {
+            RenderDamage (cr, damage.X, damage.Y, damage.Width, damage.Height);
+        }
+
+        public static void RenderDamage (this Context cr, Cairo.Rectangle damage)
+        {
+            RenderDamage (cr, damage.X, damage.Y, damage.Width, damage.Height);
+        }
+
+        public static void RenderDamage (this Context cr, double x, double y, double w, double h)
+        {
+            cr.Save ();
+            cr.LineWidth = 1.0;
+            cr.Color = CairoExtensions.RgbToColor ((uint)rand.Next (0, 0xffffff));
+            cr.Rectangle (x + 0.5, y + 0.5, w - 1, h - 1);
+            cr.Stroke ();
+            cr.Restore ();
+        }
+    }
+}