Fix crash in picking up an item that no longer exists

Adds ActorSpriteListener to manage ActorSprite destruction as
recommended by Jaxad0127. This likewise includes the changes made by
Bertram.

Reviewed-by: Jaxad0127, Bertram.

Resolves: Manasource Mantis #160

1 files changed, 42 insertions, 0 deletions

diff --git a/src/actorspritelistener.h b/src/actorspritelistener.h
new file mode 100644
index 00000000..994494f4
--- /dev/null
+++ b/src/actorspritelistener.h
@@ -0,0 +1,42 @@
+/*
+ *  The Mana Client
+ *  Copyright (C) 2010  The Mana Developers
+ *
+ *  This file is part of The Mana Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ACTORSPRITELISTENER_H
+#define ACTORSPRITELISTENER_H
+
+class ActorSprite;
+
+class ActorSpriteListener
+{
+    public:
+        /**
+         * Destructor.
+         */
+        virtual ~ActorSpriteListener() {}
+
+        /**
+         * Called when the ActorSprite has been destroyed. The listener will
+         * have to be registered first.
+         * @param actorSprite the ActorSprite being destroyed.
+         */
+        virtual void actorSpriteDestroyed(const ActorSprite &actorSprite) = 0;
+};
+
+#endif // ACTORSPRITELISTENER_H