Merge pull request #404 from Gohan/master

walkaround for Monogame Widgets Drawlines not from center origin.

Author: rds1983

src/Myra/Graphics2D/RenderContext.Shapes.cs

@@ -181,7 +181,7 @@ public void DrawLine(Vector2 point, float length, float angle, Color color,
 			float thickness = 1f)
 		{
 			var scale = new Vector2(length, thickness);
-			Draw(DefaultAssets.WhiteTexture, point, null, color, angle, scale, 0);
+			Draw(DefaultAssets.WhiteTexture, point, null, color, angle, scale, 0, drawLine: true);
 		}
 
 		/// <summary>

src/Myra/Graphics2D/RenderContext.cs

@@ -245,7 +245,7 @@ public void Draw(Texture2D texture, Rectangle destinationRectangle, Rectangle? s
 		/// <param name="color"></param>
 		/// <param name="rotation"></param>
 		/// <param name="depth"></param>
-		public void Draw(Texture2D texture, Vector2 position, Rectangle? sourceRectangle, Color color, float rotation, Vector2 scale, float depth = 0.0f)
+		public void Draw(Texture2D texture, Vector2 position, Rectangle? sourceRectangle, Color color, float rotation, Vector2 scale, float depth = 0.0f, bool drawLine = false)
 		{
 			SetTextureFiltering(TextureFiltering.Nearest);
 			color = CrossEngineStuff.MultiplyColor(color, Opacity);
@@ -254,7 +254,8 @@ public void Draw(Texture2D texture, Vector2 position, Rectangle? sourceRectangle
 
 #if MONOGAME || FNA
 			position = Transform.Apply(position);
-			 _renderer.Draw(texture, position, sourceRectangle, color, rotation, Vector2.Zero, scale, SpriteEffects.None, depth);
+			_renderer.Draw(texture, position, sourceRectangle, color, rotation,
+				drawLine ? new Vector2(0f, 0.5f) : Vector2.Zero, scale, SpriteEffects.None, depth);
 #elif STRIDE
 			position = Transform.Apply(position);
 			_renderer.Draw(texture, position, sourceRectangle, color, rotation, Vector2.Zero, scale, SpriteEffects.None, ImageOrientation.AsIs, depth);