C code for Chapayev's and Eino's request for a wall mounted "switch": if the

player takes a swing at a solid grid (ctrl-direction at it), or it's hit by
a solid-ish beam (normal thrown item, Magic Dart, etc), then a "wall hit"
dungeon event will be issued for that square; a Lua marker can listen to
that event to implement a switch/lever/button.

No Lua glue or Lua convenience classes yet.


git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10573 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 18 insertions, 1 deletions

diff --git a/crawl-ref/source/acr.cc b/crawl-ref/source/acr.cc
index f43a5130f4..fedea2c60f 100644
--- a/crawl-ref/source/acr.cc
+++ b/crawl-ref/source/acr.cc
@@ -3007,11 +3007,28 @@ static bool _untrap_target(const coord_def move, bool check_confused)
             _close_door(move); // for convenience
             return (true);
         default:
-            mpr("You swing at nothing.");
+        {
+            bool do_msg = true;
+
+            // Press trigger/switch/button in wall.
+            if (grid_is_solid(feat))
+            {
+                dgn_event event(DET_WALL_HIT, target);
+                event.arg1  = NON_MONSTER;
+
+                // Listener can veto the event to prevent the "You swing at
+                // nothing" message.
+                do_msg =
+                    dungeon_events.fire_vetoable_position_event(event,
+                                                                target);
+            }
+            if (do_msg)
+                mpr("You swing at nothing.");
             make_hungry(3, true);
             you.turn_is_over = true;
             return (true);
         }
+        }
     }
 
     // Else it's a closed door and needs further handling.