mirror of
https://github.com/libretro/scummvm.git
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139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/events.h"
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namespace Common {
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EventDispatcher::EventDispatcher() : _mapper(0) {
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}
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EventDispatcher::~EventDispatcher() {
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for (Common::List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
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if (i->autoFree)
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delete i->source;
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}
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for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
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if (i->autoFree)
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delete i->observer;
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}
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delete _mapper;
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_mapper = 0;
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}
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void EventDispatcher::dispatch() {
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Common::Event event;
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for (Common::List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
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const bool allowMapping = i->source->allowMapping();
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while (i->source->pollEvent(event)) {
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// We only try to process the events via the setup event mapper, when
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// we have a setup mapper and when the event source allows mapping.
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if (_mapper && allowMapping) {
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if (_mapper->notifyEvent(event)) {
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// We allow the event mapper to create multiple events, when
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// eating an event.
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while (_mapper->pollEvent(event))
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dispatchEvent(event);
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// Try getting another event from the current EventSource.
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continue;
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}
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}
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dispatchEvent(event);
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}
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}
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}
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void EventDispatcher::registerMapper(EventMapper *mapper) {
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if (_mapper)
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delete _mapper;
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_mapper = mapper;
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}
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void EventDispatcher::registerSource(EventSource *source, bool autoFree) {
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SourceEntry newEntry;
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newEntry.source = source;
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newEntry.autoFree = autoFree;
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_sources.push_back(newEntry);
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}
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void EventDispatcher::unregisterSource(EventSource *source) {
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for (Common::List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
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if (i->source == source) {
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if (i->autoFree)
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delete source;
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_sources.erase(i);
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return;
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}
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}
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}
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void EventDispatcher::registerObserver(EventObserver *obs, uint priority, bool autoFree) {
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ObserverEntry newEntry;
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newEntry.observer = obs;
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newEntry.priority = priority;
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newEntry.autoFree = autoFree;
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for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
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if (i->priority < priority) {
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_observers.insert(i, newEntry);
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return;
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}
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}
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_observers.push_back(newEntry);
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}
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void EventDispatcher::unregisterObserver(EventObserver *obs) {
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for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
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if (i->observer == obs) {
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if (i->autoFree)
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delete obs;
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_observers.erase(i);
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return;
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}
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}
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}
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void EventDispatcher::dispatchEvent(const Event &event) {
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for (Common::List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
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if (i->observer->notifyEvent(event))
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break;
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}
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}
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} // end of namespace Common
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