atoms.lisp: Fix undo/redo action sensitivity.

Undo should be available after the first turn, but wasn't.  The reason
is twofold:

  * `update-undo-redo-sensitivity' was hooked onto :processing-move
    rather than :start-turn, which was just a mistake, though it seemed
    not to be because the order of the notifications was wrong; and

  * `perform-explosions', which is where :start-turn is issued, was
    being called before the undo record was laid down, whereas it should
    always have been afterwards.

diff --git a/atoms.lisp b/atoms.lisp
index eac69bc..af9a21c 100644 (file)
--- a/atoms.lisp
+++ b/atoms.lisp
@@ -362,8 +362,8 @@
          (unless (cell-played cell player-index)
            (return-from escape))
          (setf (player-state player) :playing)
          (unless (cell-played cell player-index)
            (return-from escape))
          (setf (player-state player) :playing)

-         (changed game :processing-move)
-         (perform-explosions game (list cell)))))))
+         (changed game :processing-move))
+       (perform-explosions game (list cell))))))

 
 (defmethod restart-game ((game atom-game) &key grid players)
   (game-cancel-timeout game)
 
 (defmethod restart-game ((game atom-game) &key grid players)
   (game-cancel-timeout game)


@@ -1010,7 +1010,7 @@
 (defmethod notify progn
     ((window atom-game-window) (game atom-game) aspect &key)
   (case aspect
 (defmethod notify progn
     ((window atom-game-window) (game atom-game) aspect &key)
   (case aspect

-    ((:undo :redo :refresh :processing-move)
+    ((:undo :redo :refresh :start-turn)

      (update-undo-redo-sensitivity window))))
 
 (defun action-undo (window)
      (update-undo-redo-sensitivity window))))
 
 (defun action-undo (window)