Add event manager and use it to trigger sounds

1 files changed, 72 insertions, 0 deletions

diff --git a/src/event.h b/src/event.h
new file mode 100644
index 000000000..032cb2381
--- /dev/null
+++ b/src/event.h
@@ -0,0 +1,72 @@
+/*
+Minetest-c55
+Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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
+(at your option) 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, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef EVENT_HEADER
+#define EVENT_HEADER
+
+class MtEvent
+{
+public:
+	virtual ~MtEvent(){};
+	//virtual MtEvent* clone(){ return new IEvent; }
+	virtual const char* getType() const = 0;
+
+	MtEvent* checkIs(const std::string &type)
+	{
+		if(type == getType())
+			return this;
+		return NULL;
+	}
+};
+
+// An event with no parameters and customizable name
+class SimpleTriggerEvent: public MtEvent
+{
+	const char *type;
+public:
+	SimpleTriggerEvent(const char *type):
+		type(type)
+	{}
+	const char* getType() const
+	{return type;}
+};
+
+class MtEventReceiver
+{
+public:
+	virtual ~MtEventReceiver(){};
+	virtual void onEvent(MtEvent *e) = 0;
+};
+
+typedef void (*event_receive_func)(MtEvent *e, void *data);
+
+class MtEventManager
+{
+public:
+	virtual ~MtEventManager(){};
+	virtual void put(MtEvent *e) = 0;
+	virtual void reg(const char *type, event_receive_func f, void *data) = 0;
+	// If data==NULL, every occurence of f is deregistered.
+	virtual void dereg(const char *type, event_receive_func f, void *data) = 0;
+	virtual void reg(MtEventReceiver *r, const char *type) = 0;
+	virtual void dereg(MtEventReceiver *r, const char *type) = 0;
+};
+
+#endif
+