// Subject.cc for FbTk // Copyright (c) 2002 Henrik Kinnunen (fluxgen@fluxbox.org) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // $Id: Subject.cc,v 1.1 2003/02/15 01:21:40 fluxgen Exp $ #include "Subject.hh" #include "Observer.hh" #include <algorithm> #include <functional> namespace FbTk { Subject::SubjectList Subject::s_subjectlist; Subject::Subject() { s_subjectlist.push_back(this); } Subject::~Subject() { SubjectList::iterator it = s_subjectlist.begin(); SubjectList::iterator it_end = s_subjectlist.end(); for (; it != it_end; ++it) { if (this == (*it)) { s_subjectlist.erase(it); break; } } } void Subject::attach(Observer *obj) { m_observerlist.push_back(obj); // no need to have more than one instance of an observer std::unique(m_observerlist.begin(), m_observerlist.end()); } void Subject::detach(Observer *obj) { ObserverList::iterator it = m_observerlist.begin(); ObserverList::iterator it_end = m_observerlist.end(); for (; it != it_end; ++it) { if (obj == (*it)) { m_observerlist.erase(it); break; } } } void Subject::notify() { ObserverList::iterator it = m_observerlist.begin(); for (; it != m_observerlist.end(); ++it) { (*it)->update(this); } } void Subject::removeObserver(Observer *obj) { SubjectList::iterator it = s_subjectlist.begin(); for(; it != s_subjectlist.end(); ++it) { (*it)->detach(obj); } } }; // end namespace FbTk