Added an automatic `Solve' feature to most games. This is useful for

various things:
 - if you haven't fully understood what a game is about, it gives
   you an immediate example of a puzzle plus its solution so you can
   understand it
 - in some games it's useful to compare your solution with the real
   one and see where you made a mistake
 - in the rearrangement games (Fifteen, Sixteen, Twiddle) it's handy
   to be able to get your hands on a pristine grid quickly so you
   can practise or experiment with manoeuvres on it
 - it provides a good way of debugging the games if you think you've
   encountered an unsolvable grid!

[originally from svn r5731]

1 files changed, 19 insertions, 0 deletions

diff --git a/gtk.c b/gtk.c
index 66ee767..d721320 100644
--- a/gtk.c
+++ b/gtk.c
@@ -913,6 +913,17 @@ static void menu_copy_event(GtkMenuItem *menuitem, gpointer data)
     }
 }
 
+static void menu_solve_event(GtkMenuItem *menuitem, gpointer data)
+{
+    frontend *fe = (frontend *)data;
+    char *msg;
+
+    msg = midend_solve(fe->me);
+
+    if (msg)
+	error_box(fe->window, msg);
+}
+
 static void menu_config_event(GtkMenuItem *menuitem, gpointer data)
 {
     frontend *fe = (frontend *)data;
@@ -1050,6 +1061,14 @@ static frontend *new_window(char *game_id, char **error)
 			   GTK_SIGNAL_FUNC(menu_copy_event), fe);
 	gtk_widget_show(menuitem);
     }
+    if (thegame.can_solve) {
+	add_menu_separator(GTK_CONTAINER(menu));
+	menuitem = gtk_menu_item_new_with_label("Solve");
+	gtk_container_add(GTK_CONTAINER(menu), menuitem);
+	gtk_signal_connect(GTK_OBJECT(menuitem), "activate",
+			   GTK_SIGNAL_FUNC(menu_solve_event), fe);
+	gtk_widget_show(menuitem);
+    }
     add_menu_separator(GTK_CONTAINER(menu));
     add_menu_item_with_key(fe, GTK_CONTAINER(menu), "Exit", 'q');