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Merge pull request #1366 from julianko/merge_input_events

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Merge redundant input events
This commit is contained in:
scrawl 2017-08-03 21:06:51 +00:00 committed by GitHub
commit a687a20aef
1 changed files with 29 additions and 4 deletions
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33
components/sdlutil/sdlinputwrapper.cpp
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@ -49,17 +49,42 @@ InputWrapper::InputWrapper(SDL_Window* window, osg::ref_ptr<osgViewer::Viewer> v
SDL_PumpEvents();
SDL_Event evt;
SDL_Event event;
if (windowEventsOnly)
{
// During loading, just handle window events, and keep others for later
while (SDL_PeepEvents(&evt, 1, SDL_GETEVENT, SDL_WINDOWEVENT, SDL_WINDOWEVENT))
handleWindowEvent(evt);
while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_WINDOWEVENT, SDL_WINDOWEVENT))
handleWindowEvent(event);
return;
}
while(SDL_PollEvent(&evt))
// Merge redundant events to avoid unnecessary listener calls
std::vector<SDL_Event> events;
while(SDL_PollEvent(&event)) {
if (events.empty() || events.back().type != event.type)
{
events.emplace_back(event);
continue;
}
SDL_Event& previousEvent = events.back();
switch (event.type)
{
case SDL_MOUSEMOTION:
previousEvent.motion.x = event.motion.x;
previousEvent.motion.y = event.motion.y;
previousEvent.motion.xrel += event.motion.xrel;
previousEvent.motion.yrel += event.motion.yrel;
break;
default:
events.emplace_back(event);
}
}
for (const SDL_Event& evt : events)
{
switch(evt.type)
{