1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/events.h"
namespace Common {
EventDispatcher::EventDispatcher() : _mapper(0) {
}
EventDispatcher::~EventDispatcher() {
for (Common::List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
if (i->autoFree)
delete i->source;
}
for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
if (i->autoFree)
delete i->observer;
}
delete _mapper;
_mapper = 0;
}
void EventDispatcher::dispatch() {
Common::Event event;
for (Common::List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
const bool allowMapping = i->source->allowMapping();
while (i->source->pollEvent(event)) {
// We only try to process the events via the setup event mapper, when
// we have a setup mapper and when the event source allows mapping.
if (_mapper && allowMapping) {
if (_mapper->notifyEvent(event)) {
// We allow the event mapper to create multiple events, when
// eating an event.
while (_mapper->pollEvent(event))
dispatchEvent(event);
// Try getting another event from the current EventSource.
continue;
}
}
dispatchEvent(event);
}
}
}
void EventDispatcher::registerMapper(EventMapper *mapper) {
delete _mapper;
_mapper = mapper;
}
void EventDispatcher::registerSource(EventSource *source, bool autoFree) {
SourceEntry newEntry;
newEntry.source = source;
newEntry.autoFree = autoFree;
_sources.push_back(newEntry);
}
void EventDispatcher::unregisterSource(EventSource *source) {
for (Common::List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
if (i->source == source) {
if (i->autoFree)
delete source;
_sources.erase(i);
return;
}
}
}
void EventDispatcher::registerObserver(EventObserver *obs, uint priority, bool autoFree) {
ObserverEntry newEntry;
newEntry.observer = obs;
newEntry.priority = priority;
newEntry.autoFree = autoFree;
for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
if (i->priority < priority) {
_observers.insert(i, newEntry);
return;
}
}
_observers.push_back(newEntry);
}
void EventDispatcher::unregisterObserver(EventObserver *obs) {
for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
if (i->observer == obs) {
if (i->autoFree)
delete obs;
_observers.erase(i);
return;
}
}
}
void EventDispatcher::dispatchEvent(const Event &event) {
for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
if (i->observer->notifyEvent(event))
break;
}
}
} // End of namespace Common
|
