After a lot of research I ended up coming to ask you directly.
I would like to use the event collision to define when an event is in collision but whatever I face cannot make the event work. Looks like he never fits in.
I added the dhtmlxscheduler_collision.js js file and set the collision_limit option to 1.
On the other hand, the onEventLoading event with the line return this.scheduler.checkCollision (event); seems to work but not with the code I put in onEventCollision.
Hope you get some ideas.
thank you in advance
EDIT: After analysis I realize that there is no event that works as the documentation says. For the moment the only event that has worked properly is onEventLoading