New onSwipeableOpenDragStart and onSwipeableCloseDragStart events

[rampazzo1989]

Description

Fixes #935
The event onSwipeableWillOpen only starts right before the onSwipeableOpen event, not when the drag to open / close starts. This PR includes onSwipeableOpenStartDrag (direction: 'left' | 'right') and onSwipeableCloseStartDrag (direction: 'left' | 'right'), allowing execute actions when the animation to open/close starts (when drag starts).

Test plan

Tested in the example app.

[matheusinfo]

That would be great, i already had this problem on my app and had to fix it manually with patch

[marcelogaldino]

Very nice @rampazzo1989! I was looking for a solution like that. Any updates for this Pull Request ?

[m-bert]

Hi @rampazzo1989, thanks for this PR! It looks ok, but I'd like you to make some cosmetic changes, so I've left some comments.

[rampazzo1989]

Hi @rampazzo1989, thanks for this PR! It looks ok, but I'd like you to make some cosmetic changes, so I've left some comments.

Thank you for the review @m-bert! I've done the changes, really got better!

[m-bert]

Now it looks much better, thank you once again! ✅

[latekvo]

Hey @rampazzo1989,

when working on ReanimatedSwipeable, i encountered this part of your code:

const direction =
  rowState === -1
    ? 'right'
    : rowState === 1
    ? 'left'
    : translationX > 0
    ? 'left'
    : 'right';

When swiping to the left when the left panel is open, it returns left, but when swiping to the left when no panels are open, it returns right.

So when returning left and right to the callback, was your intention to return the swipe direction or the side of the panel that would be opened?

On another note, do you think the callbacks should always receive the swiping direction like they do when no panels are open, or should it stay how it is, with swiping direction returned always being right when right panel is open, and left when left one is?