X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=xboard.c;h=d4d83698b8c0b21dc328ba4023d2040c39d4a0cf;hb=8513cfa6820a37f1053708a2f0a5eeedcc7fc9a7;hp=64a7284937897a136137380d82e37b62c5ecd9a0;hpb=6d9218e397e068f6249f19bbcce1ade720cfd791;p=xboard.git

diff --git a/xboard.c b/xboard.c
index 64a7284..d4d8369 100644
--- a/xboard.c
+++ b/xboard.c
@@ -5,7 +5,7 @@
  * Massachusetts. 
  *
  * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006,
- * 2007, 2008, 2009 Free Software Foundation, Inc.
+ * 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
  *
  * The following terms apply to Digital Equipment Corporation's copyright
  * interest in XBoard:
@@ -4549,14 +4549,18 @@ SetHighlights(fromX, fromY, toX, toY)
 	if (hi1X >= 0 && hi1Y >= 0) {
 	    drawHighlight(hi1X, hi1Y, lineGC);
 	}
+    } // [HGM] first erase both, then draw new!
+    if (hi2X != toX || hi2Y != toY) {
+	if (hi2X >= 0 && hi2Y >= 0) {
+	    drawHighlight(hi2X, hi2Y, lineGC);
+	}
+    }
+    if (hi1X != fromX || hi1Y != fromY) {
 	if (fromX >= 0 && fromY >= 0) {
 	    drawHighlight(fromX, fromY, highlineGC);
 	}
     }
     if (hi2X != toX || hi2Y != toY) {
-	if (hi2X >= 0 && hi2Y >= 0) {
-	    drawHighlight(hi2X, hi2Y, lineGC);
-	}
 	if (toX >= 0 && toY >= 0) {
 	    drawHighlight(toX, toY, highlineGC);
 	}