[longomatch] Fix tringles drawing and support for different orientations

[Andoni Morales Alastruey <amorales src gnome org>]

commit 255f6653feaf7acd70f4ef3073b3ca8f0c65d115
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue May 20 16:57:19 2014 +0200

    Fix tringles drawing and support for different orientations

 .../Interfaces/Drawing/IDrawingToolkit.cs          |    3 +-
 LongoMatch.Drawing.Cairo/CairoBackend.cs           |   32 +++++++++++++++----
 2 files changed, 27 insertions(+), 8 deletions(-)
---
diff --git a/LongoMatch.Core/Interfaces/Drawing/IDrawingToolkit.cs 
b/LongoMatch.Core/Interfaces/Drawing/IDrawingToolkit.cs
index df4a3a3..a92f17b 100644
--- a/LongoMatch.Core/Interfaces/Drawing/IDrawingToolkit.cs
+++ b/LongoMatch.Core/Interfaces/Drawing/IDrawingToolkit.cs
@@ -35,7 +35,8 @@ namespace LongoMatch.Interfaces
                void Begin();
                void End();
                void DrawLine (Point start, Point stop);
-               void DrawTriangle (Point corner, double width, double height);
+               void DrawTriangle (Point corner, double width, double height,
+                                  SelectionPosition orientation);
                void DrawRectangle (Point start, double width, double height);
                void DrawRoundedRectangle (Point start, double width, double height, double radius);
                void DrawArea (List<Point> vertices);
diff --git a/LongoMatch.Drawing.Cairo/CairoBackend.cs b/LongoMatch.Drawing.Cairo/CairoBackend.cs
index 8693789..a7f174c 100644
--- a/LongoMatch.Drawing.Cairo/CairoBackend.cs
+++ b/LongoMatch.Drawing.Cairo/CairoBackend.cs
@@ -135,15 +135,33 @@ namespace LongoMatch.Drawing.Cairo
                        context.Stroke();
                }
                
-               public void DrawTriangle (Point corner, double width, double height) {
-                       double x, y;
+               public void DrawTriangle (Point corner, double width, double height,
+                                         SelectionPosition position) {
+                       double x1, y1, x2, y2, x3, y3;
+
+                       x1 = corner.X;
+                       y1 = corner.Y;
+                       
+                       switch (position) {
+                       case SelectionPosition.Top:
+                               x2 = x1 + width/2;
+                               y2 = y1 + height;
+                               x3 = x1 - width/2;
+                               y3 = y1 + height;
+                               break;
+                       case SelectionPosition.Bottom:
+                       default:
+                               x2 = x1 + width/2;
+                               y2 = y1 - height;
+                               x3 = x1 - width/2;
+                               y3 = y1 - height;
+                               break;
+                       }
                        
-                       x = corner.X;
-                       y = corner.Y;
                        context.Color = strokeColor;
-                       context.MoveTo (x, y);
-                       context.LineTo (x + width/2, y + height);
-                       context.LineTo (x - width/2, y - height);
+                       context.MoveTo (x1, y1);
+                       context.LineTo (x2, y2);
+                       context.LineTo (x3, y3);
                        context.ClosePath();
                        context.StrokePreserve ();
                        context.Color = fillColor;