Add callback on swipe events

[willedanielsson]

This PR adds the following three props: onSwipeStart, onSwipeEnd and onSwipeMove. These functions are not required and can be added in order for the user to handle the events fired from react-easy-swipe during gestures.

A concrete example of this is related to the issue #365. On iOS physical devices, disabling the scroll of the body needs some extra configuration rather than event.preventDefault() and these functions can then be utilised in order to turn of body scrolling during swiping.

[leandrowd]

Hi @willedanielsson, thanks for the contribution, I appreciate it. However, I don't think this is the best way to solve the issue you are describing. Instead of delegating to consumers to solve this on their side, I believe we should solve in the carousel so everyone benefits from it out of the box. What do you think?

[willedanielsson]

Hi @willedanielsson, thanks for the contribution, I appreciate it. However, I don't think this is the best way to solve the issue you are describing. Instead of delegating to consumers to solve this on their side, I believe we should solve in the carousel so everyone benefits from it out of the box. What do you think?

I mean the issue is only one example and it's better to allow the users to be able to use the functionality in react-easy-swipe. Maybe we want to make the background of the body red when we swipe or want to track these events, this PR would make it easier for that and is an improvement since it only adds control over the library 👍

[Jennings824]

Can we get this merged? I need to be able to determine user swipe events versus onChange (don't care about autoplay onChange events) for my application. The onSwipe functions added will do exactly what we need.

[sezna]

This looks good to me, and I think these callbacks could be valuable to consumers for many reasons, even if the primary issue at hand is not fixed within the component. @willedanielsson could you resolve the conflicts?

[willedanielsson]

@sezna Thanks and done 👍

[sezna]

I'm going to wait a little bit to give @leandrowd a chance to object just in case.

[willedanielsson]

@sezna Will you merge it as well or is it @leandrowd that does it? 👍

[Igor-Palaguta]

@willedanielsson
Please can you share code how to prevent body scrolling during carousel swipe. stopPropagation and preventDefault in onSwipeXXX callbacks did not help