From: Simon Tatham <anakin@pobox.com>
Date: Tue, 26 Apr 2005 08:20:25 +0000 (+0000)
Subject: Fix trivial UI glitch involving clicking on the border outside the
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=22ab2c0b8237e1c51fdb479668ab764900f7d0c0;p=sgt-puzzles.git

Fix trivial UI glitch involving clicking on the border outside the
grid. I'm really starting to get annoyed by the default round-
towards-zero behaviour of C integer division.

[originally from svn r5681]
---

diff --git a/solo.c b/solo.c
index a023eff..8ef1cad 100644
--- a/solo.c
+++ b/solo.c
@@ -1209,8 +1209,8 @@ static game_state *make_move(game_state *from, game_ui *ui, int x, int y,
     int tx, ty;
     game_state *ret;
 
-    tx = (x - BORDER) / TILE_SIZE;
-    ty = (y - BORDER) / TILE_SIZE;
+    tx = (x + TILE_SIZE - BORDER) / TILE_SIZE - 1;
+    ty = (y + TILE_SIZE - BORDER) / TILE_SIZE - 1;
 
     if (tx >= 0 && tx < cr && ty >= 0 && ty < cr && button == LEFT_BUTTON) {
 	if (tx == ui->hx && ty == ui->hy) {