From 15caae7fbe25f432679e809259a5bf57536a3f6a Mon Sep 17 00:00:00 2001
From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Mon, 3 Nov 2014 21:59:09 +0100
Subject: [PATCH] Allow creation of DarkSquares in EditPosition mode

Dragging an EmptySquare off board will make it a DarkSquare. Dragging
anything else off board (incl. DarkSquares) makes it empty, as before.
---
 backend.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/backend.c b/backend.c
index f7b8fd4..0b4ad84 100644
--- a/backend.c
+++ b/backend.c
@@ -6948,7 +6948,7 @@ UserMoveEvent(int fromX, int fromY, int toX, int toY, int promoChar)
 	/* EditPosition, empty square, or different color piece;
 	   click-click move is possible */
 	if (toX == -2 || toY == -2) {
-	    boards[0][fromY][fromX] = EmptySquare;
+	    boards[0][fromY][fromX] = (boards[0][fromY][fromX] == EmptySquare ? DarkSquare : EmptySquare);
 	    DrawPosition(FALSE, boards[currentMove]);
 	    return;
 	} else if (toX >= 0 && toY >= 0) {
-- 
1.7.0.4