tibia-client/src/framework/core/eventdispatcher.cpp

106 lines
3.8 KiB
C++

/*
* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
*
* 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.
*/
#include "eventdispatcher.h"
#include <framework/core/clock.h>
#include "timer.h"
EventDispatcher g_eventDispatcher;
void EventDispatcher::flush()
{
while(!m_eventList.empty())
poll();
while(!m_scheduledEventList.empty())
m_scheduledEventList.pop();
}
void EventDispatcher::poll()
{
while(!m_scheduledEventList.empty()) {
ScheduledEventPtr scheduledEvent = m_scheduledEventList.top();
if(scheduledEvent->reamaningTicks() > 0)
break;
m_scheduledEventList.pop();
scheduledEvent->execute();
if(scheduledEvent->nextCycle())
m_scheduledEventList.push(scheduledEvent);
}
// execute events list up to 10 times, this is needed because some events can schedule new events that would
// change the UIWidgets layout, in this case we must execute these new events before we continue rendering,
// we can't loop until the event list is empty, because this could lead to infinite loops
// if someone write a module with bad code
m_pollEventsSize = m_eventList.size();
int count = 0;
while(m_pollEventsSize > 0) {
if(count > 50) {
static Timer reportTimer;
if(reportTimer.running() && reportTimer.ticksElapsed() > 250) {
g_logger.error("ATTENTION the event list is not getting empty, this could be caused by some bad code");
reportTimer.restart();
}
break;
}
for(int i=0;i<m_pollEventsSize;++i) {
EventPtr event = m_eventList.front();
m_eventList.pop_front();
event->execute();
}
m_pollEventsSize = m_eventList.size();
count++;
}
}
ScheduledEventPtr EventDispatcher::scheduleEvent(const std::function<void()>& callback, int delay)
{
assert(delay >= 0);
ScheduledEventPtr scheduledEvent(new ScheduledEvent(callback, delay, 1));
m_scheduledEventList.push(scheduledEvent);
return scheduledEvent;
}
ScheduledEventPtr EventDispatcher::cycleEvent(const std::function<void()>& callback, int delay)
{
assert(delay > 0);
ScheduledEventPtr scheduledEvent(new ScheduledEvent(callback, delay, 0));
m_scheduledEventList.push(scheduledEvent);
return scheduledEvent;
}
EventPtr EventDispatcher::addEvent(const std::function<void()>& callback, bool pushFront)
{
EventPtr event(new Event(callback));
// front pushing is a way to execute an event before others
if(pushFront) {
m_eventList.push_front(event);
// the poll event list only grows when pushing into front
m_pollEventsSize++;
} else
m_eventList.push_back(event);
return event;
}