mirror of
https://github.com/libretro/scummvm.git
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255 lines
6.5 KiB
C++
255 lines
6.5 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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*
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/events.h"
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#include "common/system.h"
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namespace Common {
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bool isMouseEvent(const Event &event) {
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return event.type == EVENT_LBUTTONDOWN
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|| event.type == EVENT_LBUTTONUP
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|| event.type == EVENT_RBUTTONDOWN
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|| event.type == EVENT_RBUTTONUP
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|| event.type == EVENT_MBUTTONDOWN
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|| event.type == EVENT_MBUTTONUP
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|| event.type == EVENT_X1BUTTONDOWN
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|| event.type == EVENT_X1BUTTONUP
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|| event.type == EVENT_X2BUTTONDOWN
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|| event.type == EVENT_X2BUTTONUP
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|| event.type == EVENT_WHEELDOWN
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|| event.type == EVENT_WHEELUP
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|| event.type == EVENT_MOUSEMOVE;
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}
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EventSource::~EventSource() {}
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EventObserver::~EventObserver() {}
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EventMapper::~EventMapper() {}
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EventManager::~EventManager() {}
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EventDispatcher::EventDispatcher() : _mapper(nullptr) {
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}
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EventDispatcher::~EventDispatcher() {
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for (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 (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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}
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void EventDispatcher::dispatch() {
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Event event;
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dispatchPoll();
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for (List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
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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 (i->source->allowMapping()) {
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assert(_mapper);
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// Backends may not produce directly action event types, those are meant
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// to be the output of the event mapper.
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assert(event.type != EVENT_CUSTOM_BACKEND_ACTION_START);
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assert(event.type != EVENT_CUSTOM_BACKEND_ACTION_END);
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assert(event.type != EVENT_CUSTOM_ENGINE_ACTION_START);
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assert(event.type != EVENT_CUSTOM_ENGINE_ACTION_END);
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List<Event> mappedEvents = _mapper->mapEvent(event);
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for (List<Event>::iterator j = mappedEvents.begin(); j != mappedEvents.end(); ++j) {
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const Event mappedEvent = *j;
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dispatchEvent(mappedEvent);
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}
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} else {
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dispatchEvent(event);
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}
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}
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}
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}
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void EventDispatcher::clearEvents() {
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Event event;
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for (List<SourceEntry>::iterator i = _sources.begin(); i != _sources.end(); ++i) {
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while (i->source->pollEvent(event)) {}
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}
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}
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void EventDispatcher::registerMapper(EventMapper *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 (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, bool notifyPoll) {
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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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newEntry.poll = notifyPoll;
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for (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 (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 (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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void EventDispatcher::dispatchPoll() {
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for (List<ObserverEntry>::iterator i = _observers.begin(); i != _observers.end(); ++i) {
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if (i->poll)
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i->observer->notifyPoll();
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}
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}
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class KeyboardRepeatEventSourceWrapper : public Common::EventSource {
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public:
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KeyboardRepeatEventSourceWrapper(Common::EventSource *delegate) :
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_delegate(delegate),
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_keyRepeatTime(0) {
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assert(delegate);
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}
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// EventSource API
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bool pollEvent(Common::Event &event) override {
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uint32 time = g_system->getMillis(true);
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bool gotEvent = _delegate->pollEvent(event);
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if (gotEvent) {
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switch (event.type) {
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case Common::EVENT_KEYDOWN:
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// init continuous event stream
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_currentKeyDown = event.kbd;
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_keyRepeatTime = time + kKeyRepeatInitialDelay;
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break;
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case Common::EVENT_KEYUP:
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if (event.kbd.keycode == _currentKeyDown.keycode) {
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// Only stop firing events if it's the current key
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_currentKeyDown.keycode = Common::KEYCODE_INVALID;
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}
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break;
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default:
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break;
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}
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return true;
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} else {
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// Check if event should be sent again (keydown)
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if (_currentKeyDown.keycode != Common::KEYCODE_INVALID && _keyRepeatTime <= time) {
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// fire event
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event.type = Common::EVENT_KEYDOWN;
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event.kbdRepeat = true;
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event.kbd = _currentKeyDown;
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_keyRepeatTime = time + kKeyRepeatSustainDelay;
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return true;
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}
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return false;
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}
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}
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bool allowMapping() const override {
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return _delegate->allowMapping();
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}
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private:
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// for continuous events (keyDown)
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enum {
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kKeyRepeatInitialDelay = 400,
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kKeyRepeatSustainDelay = 100
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};
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Common::EventSource *_delegate;
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Common::KeyState _currentKeyDown;
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uint32 _keyRepeatTime;
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};
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EventSource *makeKeyboardRepeatingEventSource(EventSource *eventSource) {
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if (!eventSource) {
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return nullptr;
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}
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return new KeyboardRepeatEventSourceWrapper(eventSource);
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}
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} // End of namespace Common
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