1 files changed, 95 insertions, 9 deletions

diff --git a/src/ExtensionsMethods.cs b/src/ExtensionsMethods.cs
index 6697be62..340a8ceb 100644
--- a/src/ExtensionsMethods.cs
+++ b/src/ExtensionsMethods.cs
@@ -58,17 +58,18 @@ namespace Crow
 		public static Cairo.PointD Substract(this Cairo.PointD p1, Cairo.PointD p2){
 			return new Cairo.PointD(p1.X - p2.X, p1.Y - p2.Y);
 		}
+		public static Cairo.PointD Divide(this Cairo.PointD p1, double d){
+			return new Cairo.PointD(p1.X / d, p1.Y / d);
+		}
 		public static Cairo.PointD Add(this Cairo.PointD p1, Cairo.PointD p2){
 			return new Cairo.PointD(p1.X + p2.X, p1.Y + p2.Y);
 		}
 		public static Cairo.PointD Multiply(this Cairo.PointD p1, double v){
 			return new Cairo.PointD(p1.X * v, p1.Y * v);
 		}
-		public static void DrawCote(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2, double stroke = 1.0)
-		{
-			const double arrowWidth = 4.0;
-			const double arrowLength = 10.0;
-
+		public static void DrawCote(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2,
+			double stroke = 1.0, bool fill = false, double arrowWidth = 3.0, double arrowLength = 7.0)
+		{			
 			Cairo.PointD vDir = p2.Substract(p1);
 			vDir = vDir.GetNormalized ();
 			Cairo.PointD vPerp = vDir.GetPerp ();
@@ -80,21 +81,77 @@ namespace Crow
 
 			ctx.MoveTo (p1);
 			ctx.LineTo (pA0.Add (vA));
-			ctx.LineTo (pA0.Substract (vA));
+			if (fill)
+				ctx.LineTo (pA0.Substract (vA));
+			else
+				ctx.MoveTo (pA0.Substract (vA));
+			
 			ctx.LineTo (p1);
 
 			ctx.MoveTo (p2);
 			ctx.LineTo (pA1.Add (vA));
-			ctx.LineTo (pA1.Substract (vA));
+			if (fill)
+				ctx.LineTo (pA1.Substract (vA));
+			else
+				ctx.MoveTo (pA1.Substract (vA));
 			ctx.LineTo (p2);
 
-			ctx.Fill ();
+			if (fill)
+				ctx.Fill ();
 
 			ctx.MoveTo (p1);
 			ctx.LineTo (p2);
 			ctx.LineWidth = stroke;
 			ctx.Stroke ();
+		}
+		public static void DrawCoteInverse(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2,
+			double stroke = 1.0, bool fill = false, double arrowWidth = 3.0, double arrowLength = 7.0)
+		{			
+			Cairo.PointD vDir = p2.Substract(p1);
+			vDir = vDir.GetNormalized ();
+			Cairo.PointD vPerp = vDir.GetPerp ();
+
+			Cairo.PointD pA0 = p1.Add(vDir.Multiply(arrowLength));
+			Cairo.PointD pA1 = p2.Substract(vDir.Multiply(arrowLength));
+
+			Cairo.PointD vA = vPerp.Multiply (arrowWidth);
+
+			ctx.MoveTo (p1.Add (vA));
+			ctx.LineTo (pA0);
+			ctx.LineTo (p1.Substract (vA));
+			if (fill)
+				ctx.LineTo (p1.Add (vA));
+
+			ctx.MoveTo (p2.Add (vA));
+			ctx.LineTo (pA1);
+			ctx.LineTo (p2.Substract (vA));
+
+			if (fill) {
+				ctx.LineTo (p2.Add (vA));
+				ctx.Fill ();
+			}
 
+			ctx.MoveTo (pA0);
+			ctx.LineTo (pA1);
+			ctx.LineWidth = stroke;
+			ctx.Stroke ();
+		}
+		public static void DrawCoteFixed(this Cairo.Context ctx, Cairo.PointD p1, Cairo.PointD p2,
+			double stroke = 1.0, double coteWidth = 3.0)
+		{			
+			Cairo.PointD vDir = p2.Substract(p1);
+			vDir = vDir.GetNormalized ();
+			Cairo.PointD vPerp = vDir.GetPerp ();
+			Cairo.PointD vA = vPerp.Multiply (coteWidth);
+
+			ctx.MoveTo (p1.Add (vA));
+			ctx.LineTo (p1.Substract (vA));
+			ctx.MoveTo (p2.Add (vA));
+			ctx.LineTo (p2.Substract (vA));
+			ctx.MoveTo (p1);
+			ctx.LineTo (p2);
+			ctx.LineWidth = stroke;
+			ctx.Stroke ();
 		}
 		public static void SetSourceColor(this Cairo.Context ctx, Color c)
 		{
@@ -106,6 +163,30 @@ namespace Crow
 		}
 		#endregion
 
+		public static Orientation GetOrientation(this Alignment a){
+			return (a==Alignment.Left) ||(a==Alignment.Right) ? Orientation.Horizontal : Orientation.Vertical;
+		}
+		public static Alignment GetOpposite(this Alignment a){
+			switch (a) {
+			case Alignment.Left:
+				return Alignment.Right;
+			case Alignment.Right:
+				return Alignment.Left;
+			case Alignment.Top:
+				return Alignment.Bottom;
+			case Alignment.Bottom:
+				return Alignment.Top;
+			case Alignment.TopLeft:
+				return Alignment.BottomRight;
+			case Alignment.TopRight:
+				return Alignment.BottomLeft;
+			case Alignment.BottomLeft:
+				return Alignment.TopRight;
+			case Alignment.BottomRight:
+				return Alignment.TopLeft;			
+			}
+			return Alignment.Center;
+		}
 		public static void Raise(this EventHandler handler, object sender, EventArgs e)
 		{
 			if(handler != null)
@@ -120,7 +201,12 @@ namespace Crow
 				handler(sender, e);
 			}
 		}
-
+		public static byte[] GetBytes(this string str)
+		{
+			byte[] bytes = new byte[str.Length * sizeof(char)];
+			System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
+			return bytes;
+		}
 		public static bool IsWhiteSpaceOrNewLine (this char c)
 		{
 			return c == '\t' || c == '\r' || c == '\n' || char.IsWhiteSpace (c);