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authorJacek Antonelli2008-08-15 23:44:46 -0500
committerJacek Antonelli2008-08-15 23:44:46 -0500
commit38d6d37f2d982fa959e9e8a4a3f7e1ccfad7b5d4 (patch)
treeadca584755d22ca041a2dbfc35d4eca01f70b32c /linden/indra/llmedia/llmediaemitter.h
parentREADME.txt (diff)
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Second Life viewer sources 1.13.2.12
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1/**
2 * @file llmediaemitter.h
3 * @brief LLMedia support - templatized emitter class.
4 *
5 * Copyright (c) 2005-2007, Linden Research, Inc.
6 *
7 * The source code in this file ("Source Code") is provided by Linden Lab
8 * to you under the terms of the GNU General Public License, version 2.0
9 * ("GPL"), unless you have obtained a separate licensing agreement
10 * ("Other License"), formally executed by you and Linden Lab. Terms of
11 * the GPL can be found in doc/GPL-license.txt in this distribution, or
12 * online at http://secondlife.com/developers/opensource/gplv2
13 *
14 * There are special exceptions to the terms and conditions of the GPL as
15 * it is applied to this Source Code. View the full text of the exception
16 * in the file doc/FLOSS-exception.txt in this software distribution, or
17 * online at http://secondlife.com/developers/opensource/flossexception
18 *
19 * By copying, modifying or distributing this software, you acknowledge
20 * that you have read and understood your obligations described above,
21 * and agree to abide by those obligations.
22 *
23 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
24 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
25 * COMPLETENESS OR PERFORMANCE.
26 */
27
28// header guard
29#ifndef llmediaemitter_h
30#define llmediaemitter_h
31
32// standard headers
33#include <algorithm>
34#include <typeinfo>
35#include <iostream>
36#include <list>
37
38#include "stdtypes.h"
39
40///////////////////////////////////////////////////////////////////////////////
41// templatized emitter class
42template < class T >
43class LLMediaEmitter
44{
45 public:
46 typedef typename T::EventType EventType;
47 typedef std::list< T* > ObserverContainer;
48 typedef void ( T::*observerMethod )( const EventType& );
49
50 protected:
51 ObserverContainer observers;
52
53 public:
54 LLMediaEmitter()
55 {
56 };
57
58 ~LLMediaEmitter()
59 {
60 };
61
62 ///////////////////////////////////////////////////////////////////////////////
63 //
64 BOOL addObserver ( T* observerIn )
65 {
66 if ( ! observerIn )
67 return FALSE;
68
69 // check if observer already exists
70 if ( std::find ( observers.begin (), observers.end (), observerIn ) != observers.end () )
71 return FALSE;
72
73 // save it
74 observers.push_back ( observerIn );
75
76 return true;
77 };
78
79 ///////////////////////////////////////////////////////////////////////////////
80 //
81 BOOL remObserver ( T* observerIn )
82 {
83 if ( ! observerIn )
84 return FALSE;
85
86 observers.remove ( observerIn );
87
88 return TRUE;
89 };
90
91 ///////////////////////////////////////////////////////////////////////////////
92 //
93 void update ( observerMethod method, const EventType& msgIn )
94 {
95 typename std::list< T* >::iterator iter = observers.begin ();
96
97 while ( iter != observers.end () )
98 {
99 ( ( *iter )->*method ) ( msgIn );
100
101 ++iter;
102 };
103 };
104 };
105
106
107#endif // llmediaemitter_h