[gbrainy] Show total drawing area when in design mode, more validations and little refactoring

[Jordi Mas <jmas src gnome org>]

commit 728122c9e9738b1c32c5b62502fc0d60f9ccc5f5
Author: Jordi Mas <jmas softcatala org>
Date:   Sat Jan 19 09:32:09 2013 +0100

    Show total drawing area when in design mode, more validations and little refactoring

 src/Core/Main/Game.cs                   |    8 +++++++
 src/Core/Toolkit/Container.cs           |    6 +++++
 src/Core/Toolkit/HorizontalContainer.cs |   32 ++++++++++++++++++------------
 3 files changed, 33 insertions(+), 13 deletions(-)
---
diff --git a/src/Core/Main/Game.cs b/src/Core/Main/Game.cs
index 90640e4..78c9cdb 100644
--- a/src/Core/Main/Game.cs
+++ b/src/Core/Main/Game.cs
@@ -291,6 +291,14 @@ namespace gbrainy.Core.Main
 
 			foreach (Toolkit.Container container in containers)
 				container.Draw (gr, width, height, rtl);
+
+#if DESIGN_MODE
+			gr.Save ();
+			gr.Color = new Cairo.Color (0, 1, 0);
+			gr.Rectangle (0, 0, 1, 1);
+			gr.Stroke ();
+			gr.Restore ();
+#endif
 		}
 
 		public virtual void DrawPreview (CairoContextEx gr, int width, int height, bool rtl)
diff --git a/src/Core/Toolkit/Container.cs b/src/Core/Toolkit/Container.cs
index 9d6006a..106198f 100644
--- a/src/Core/Toolkit/Container.cs
+++ b/src/Core/Toolkit/Container.cs
@@ -45,6 +45,12 @@ namespace gbrainy.Core.Toolkit
 			if (y < 0 || y > 1)
 				throw new ArgumentOutOfRangeException ("y");
 
+			if (width + x < 0 || width + x > 1)
+				throw new ArgumentOutOfRangeException ("width");
+
+			if (height + y < 0 || height + y > 1)
+				throw new ArgumentOutOfRangeException ("height");
+
 			X = x;
 			Y = y;
 		}
diff --git a/src/Core/Toolkit/HorizontalContainer.cs b/src/Core/Toolkit/HorizontalContainer.cs
index 60eb710..1f79ae3 100644
--- a/src/Core/Toolkit/HorizontalContainer.cs
+++ b/src/Core/Toolkit/HorizontalContainer.cs
@@ -32,21 +32,10 @@ namespace gbrainy.Core.Toolkit
 		public HorizontalContainer (double x, double y, double width, double height) : base (x, y, width, height)
 		{
 
-		}		
+		}
 
-		public override void Draw (CairoContextEx gr, int area_width, int area_height, bool rtl)
+		void ValidateDimensions ()
 		{
-			double x = X, y = Y;
-	
-			this.rtl = rtl;
-
-#if DESIGN_MODE
-			gr.Save ();
-			gr.Color = new Cairo.Color (0, 0, 1);
-			gr.Rectangle (X, Y, Width, Height);
-			gr.Stroke ();
-			gr.Restore ();
-
 			double width = 0;
 
 			foreach (Widget child in children)
@@ -59,7 +48,24 @@ namespace gbrainy.Core.Toolkit
 
 			if (Width < width)
 				throw new InvalidOperationException (String.Format ("Container witdh too small {0} < {1}", Width, width));
+		}
+
+		public override void Draw (CairoContextEx gr, int area_width, int area_height, bool rtl)
+		{
+			double x = X, y = Y;
+	
+			this.rtl = rtl;
+
+#if DESIGN_MODE
+			gr.Save ();
+			gr.Color = new Cairo.Color (0, 0, 1);
+			gr.Rectangle (X, Y, Width, Height);
+			gr.Stroke ();
+			gr.Restore ();
+
+			ValidateDimensions ();
 #endif
+
 			//
 			// Coordinates are stored right to left
 			//