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authorfluxgen <fluxgen>2002-09-07 20:32:44 (GMT)
committerfluxgen <fluxgen>2002-09-07 20:32:44 (GMT)
commite9cd9e763d85940d4fbf770537fcde64d202c2f6 (patch)
tree4105fc5c5a8c6e2280a275d24a8ff01719242770 /src/Subject.cc
parent5ee0f8d309418fea649ae1d488ea94b3ed8c2d8c (diff)
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1// Subject.cc for FbTk
2// Copyright (c) 2002 Henrik Kinnunen (fluxgen@fluxbox.org)
3//
4// Permission is hereby granted, free of charge, to any person obtaining a
5// copy of this software and associated documentation files (the "Software"),
6// to deal in the Software without restriction, including without limitation
7// the rights to use, copy, modify, merge, publish, distribute, sublicense,
8// and/or sell copies of the Software, and to permit persons to whom the
9// Software is furnished to do so, subject to the following conditions:
10//
11// The above copyright notice and this permission notice shall be included in
12// all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20// DEALINGS IN THE SOFTWARE.
21
22// $Id: Subject.cc,v 1.1 2002/09/07 20:30:45 fluxgen Exp $
23
24#include "Subject.hh"
25#include "Observer.hh"
26
27#include <algorithm>
28#include <functional>
29
30namespace FbTk {
31
32Subject::SubjectList Subject::s_subjectlist;
33
34Subject::Subject() {
35 s_subjectlist.push_back(this);
36}
37
38Subject::~Subject() {
39 SubjectList::iterator it = s_subjectlist.begin();
40 SubjectList::iterator it_end = s_subjectlist.end();
41 for (; it != it_end; ++it) {
42 if (this == (*it)) {
43 s_subjectlist.erase(it);
44 break;
45 }
46 }
47}
48
49void Subject::attach(Observer *obj) {
50 m_observerlist.push_back(obj);
51 // no need to have more than one instance of an observer
52 std::unique(m_observerlist.begin(), m_observerlist.end());
53}
54
55void Subject::detach(Observer *obj) {
56 ObserverList::iterator it = m_observerlist.begin();
57 ObserverList::iterator it_end = m_observerlist.end();
58 for (; it != it_end; ++it) {
59 if (obj == (*it)) {
60 m_observerlist.erase(it);
61 break;
62 }
63 }
64}
65
66void Subject::notify() {
67 ObserverList::iterator it = m_observerlist.begin();
68 for (; it != m_observerlist.end(); ++it) {
69 (*it)->update(this);
70 }
71}
72
73void Subject::removeObserver(Observer *obj) {
74 SubjectList::iterator it = s_subjectlist.begin();
75 for(; it != s_subjectlist.end(); ++it) {
76 (*it)->detach(obj);
77 }
78}
79
80}; // end namespace FbTk