Add LONG_PRESS event.

[joshwritescode]

It would be useful to have an event listener for long press events that would work with either mouse or touch events.

[bp74]

Thanks for suggestion, i think this is a good idea and should be easy to do. I will take a look at it.

[bp74]

I started to investigate this, but it's not as easy to add as i thought in the first place. Mouse and Touch events are only dispatched if there is a native DOM event, but the long press event would need to be checked on each frame. I have to think about it a little bit longer.