From 02352af3d98c14fa3c4dceb35cdc46812f62f6c7 Mon Sep 17 00:00:00 2001
From: "petrak@" <petrathekat@gmail.com>
Date: Sat, 22 Jul 2023 00:03:03 -0500
Subject: [PATCH] Render the ranks and files on the edge cells, like Lichess
 does

---
 .../src/Framework/Application/UI/BoardTheme.cs  |  3 +++
 .../src/Framework/Application/UI/BoardUI.cs     | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/Chess-Challenge/src/Framework/Application/UI/BoardTheme.cs b/Chess-Challenge/src/Framework/Application/UI/BoardTheme.cs
index 181a67f..40eb0cb 100644
--- a/Chess-Challenge/src/Framework/Application/UI/BoardTheme.cs
+++ b/Chess-Challenge/src/Framework/Application/UI/BoardTheme.cs
@@ -23,6 +23,9 @@ namespace ChessChallenge.Application
         public Color CheckDark = new Color(207, 39, 39, 255);
 
         public Color BorderCol = new Color(44, 44, 44, 255);
+
+        public Color LightCoordCol = new Color(255, 240, 220, 255);
+        public Color DarkCoordCol = new Color(140, 100, 80, 255);
     }
 }
 
diff --git a/Chess-Challenge/src/Framework/Application/UI/BoardUI.cs b/Chess-Challenge/src/Framework/Application/UI/BoardUI.cs
index c49668d..2c0e558 100644
--- a/Chess-Challenge/src/Framework/Application/UI/BoardUI.cs
+++ b/Chess-Challenge/src/Framework/Application/UI/BoardUI.cs
@@ -318,6 +318,23 @@ namespace ChessChallenge.Application
             {
                 DrawPiece(piece, new Vector2((int)pos.X, (int)pos.Y), alpha);
             }
+
+            int textSize = 25;
+            float xpadding = 5f, ypadding = 2f;
+            Color otherColor = coord.IsLightSquare() ? theme.DarkCoordCol : theme.LightCoordCol;
+            if (rank == 0) {
+                string fileLetter = "abcdefgh"[file].ToString();
+                UIHelper.DrawText(fileLetter,
+                    pos + new Vector2(xpadding, squareSize - ypadding),
+                    textSize, 123, otherColor,
+                    UIHelper.AlignH.Left, UIHelper.AlignV.Bottom);
+            }
+            if (file == 7) {
+                UIHelper.DrawText((rank + 1).ToString(),
+                    pos + new Vector2(squareSize - xpadding, ypadding),
+                    textSize, 123, otherColor,
+                    UIHelper.AlignH.Right, UIHelper.AlignV.Top);
+            }
         }
 
         Vector2 GetSquarePos(int file, int rank, bool whitePerspective)