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Add Observable template.
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src/observable.h
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59
src/observable.h
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/* ASEPRITE
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* Copyright (C) 2001-2012 David Capello
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef OBSERVABLE_H_INCLUDED
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#define OBSERVABLE_H_INCLUDED
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#include "observers.h"
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template<typename Observer>
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class Observable {
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public:
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void addObserver(Observer* observer) {
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m_observers.addObserver(observer);
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}
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void removeObserver(Observer* observer) {
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m_observers.removeObserver(observer);
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}
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void notifyObservers(void (Observer::*method)()) {
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m_observers.notifyObservers(method);
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}
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template<typename A1>
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void notifyObservers(void (Observer::*method)(A1), A1 a1) {
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m_observers.notifyObservers(method, a1);
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}
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template<typename A1, typename A2>
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void notifyObservers(void (Observer::*method)(A1, A2), A1 a1, A2 a2) {
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m_observers.notifyObservers(method, a1, a2);
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}
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template<typename A1, typename A2, typename A3>
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void notifyObservers(void (Observer::*method)(A1, A2, A3), A1 a1, A2 a2, A3 a3) {
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m_observers.notifyObservers(method, a1, a2, a3);
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}
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private:
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Observers<Observer> m_observers;
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};
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#endif // OBSERVERS_H_INCLUDED
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@ -41,23 +41,20 @@ public:
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Observers() { }
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Observers() { }
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~Observers()
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~Observers() {
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{
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disposeAllObservers();
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disposeAllObservers();
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}
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}
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// Adds the observer in the collection. The observer is owned by the
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// Adds the observer in the collection. The observer is owned by the
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// collection and will be destroyed calling the T::dispose() member
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// collection and will be destroyed calling the T::dispose() member
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// function.
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// function.
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void addObserver(observer_type* observer)
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void addObserver(observer_type* observer) {
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{
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m_observers.push_back(observer);
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m_observers.push_back(observer);
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}
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}
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// Removes the observer from the collection. After calling this
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// Removes the observer from the collection. After calling this
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// function you own the observer so you have to dispose it.
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// function you own the observer so you have to dispose it.
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void removeObserver(observer_type* observer)
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void removeObserver(observer_type* observer) {
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{
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iterator it = std::find(m_observers.begin(), m_observers.end(), observer);
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iterator it = std::find(m_observers.begin(), m_observers.end(), observer);
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if (it != end())
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if (it != end())
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m_observers.erase(it);
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m_observers.erase(it);
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// Disposes all observers. It's called automatically in the
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// Disposes all observers. It's called automatically in the
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// Observers dtor.
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// Observers dtor.
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void disposeAllObservers()
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void disposeAllObservers() {
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{
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while (!empty())
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while (!empty())
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(*begin())->dispose();
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(*begin())->dispose();
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m_observers.clear();
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m_observers.clear();
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}
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}
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void notifyObservers(void (observer_type::*method)())
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void notifyObservers(void (observer_type::*method)()) {
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{
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for (iterator
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for (iterator
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it = this->begin(),
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it = this->begin(),
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end = this->end(); it != end; ++it) {
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end = this->end(); it != end; ++it) {
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@ -82,13 +77,30 @@ public:
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}
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}
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}
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}
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template<typename Arg1>
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template<typename A1>
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void notifyObservers(void (observer_type::*method)(Arg1), Arg1 arg1)
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void notifyObservers(void (observer_type::*method)(A1), A1 a1) {
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{
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for (iterator
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for (iterator
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it = this->begin(),
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it = this->begin(),
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end = this->end(); it != end; ++it) {
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end = this->end(); it != end; ++it) {
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((*it)->*method)(arg1);
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((*it)->*method)(a1);
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}
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}
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template<typename A1, typename A2>
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void notifyObservers(void (observer_type::*method)(A1, A2), A1 a1, A2 a2) {
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for (iterator
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it = this->begin(),
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end = this->end(); it != end; ++it) {
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((*it)->*method)(a1, a2);
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}
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}
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template<typename A1, typename A2, typename A3>
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void notifyObservers(void (observer_type::*method)(A1, A2, A3), A1 a1, A2 a2, A3 a3) {
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for (iterator
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it = this->begin(),
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end = this->end(); it != end; ++it) {
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((*it)->*method)(a1, a2, a3);
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}
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}
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}
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}
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