106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "eventdispatcher.h"
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#include <framework/core/clock.h>
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#include "timer.h"
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EventDispatcher g_eventDispatcher;
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void EventDispatcher::flush()
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{
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while(!m_eventList.empty())
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poll();
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while(!m_scheduledEventList.empty())
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m_scheduledEventList.pop();
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}
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void EventDispatcher::poll()
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{
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while(!m_scheduledEventList.empty()) {
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ScheduledEventPtr scheduledEvent = m_scheduledEventList.top();
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if(scheduledEvent->reamaningTicks() > 0)
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break;
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m_scheduledEventList.pop();
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scheduledEvent->execute();
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if(scheduledEvent->nextCycle())
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m_scheduledEventList.push(scheduledEvent);
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}
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// execute events list up to 10 times, this is needed because some events can schedule new events that would
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// change the UIWidgets layout, in this case we must execute these new events before we continue rendering,
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// we can't loop until the event list is empty, because this could lead to infinite loops
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// if someone write a module with bad code
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m_pollEventsSize = m_eventList.size();
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int count = 0;
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while(m_pollEventsSize > 0) {
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if(count > 50) {
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static Timer reportTimer;
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if(reportTimer.running() && reportTimer.ticksElapsed() > 250) {
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g_logger.error("ATTENTION the event list is not getting empty, this could be caused by some bad code");
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reportTimer.restart();
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}
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break;
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}
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for(int i=0;i<m_pollEventsSize;++i) {
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EventPtr event = m_eventList.front();
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m_eventList.pop_front();
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event->execute();
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}
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m_pollEventsSize = m_eventList.size();
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count++;
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}
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}
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ScheduledEventPtr EventDispatcher::scheduleEvent(const std::function<void()>& callback, int delay)
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{
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assert(delay >= 0);
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ScheduledEventPtr scheduledEvent(new ScheduledEvent(callback, delay, 1));
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m_scheduledEventList.push(scheduledEvent);
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return scheduledEvent;
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}
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ScheduledEventPtr EventDispatcher::cycleEvent(const std::function<void()>& callback, int delay)
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{
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assert(delay > 0);
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ScheduledEventPtr scheduledEvent(new ScheduledEvent(callback, delay, 0));
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m_scheduledEventList.push(scheduledEvent);
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return scheduledEvent;
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}
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EventPtr EventDispatcher::addEvent(const std::function<void()>& callback, bool pushFront)
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{
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EventPtr event(new Event(callback));
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// front pushing is a way to execute an event before others
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if(pushFront) {
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m_eventList.push_front(event);
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// the poll event list only grows when pushing into front
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m_pollEventsSize++;
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} else
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m_eventList.push_back(event);
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return event;
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}
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