Wrong top calculation for scroll ancestors with fixed position?

[bbenzikry]

Hi there, we're using the library to create a dnd experience between a scrollable fixed position div and a sortable ( scrollable ) drop zone.
This mostly works well ( we're currently using PR #54 as our basis ) but causes our DragOverlay to appear in the wrong top position after scrolling the drop zone.

Below is an example based on the sandbox shown in #43

https://codesandbox.io/s/react-dnd-grid-forked-gls5l?file=/src/App.js

We made a change to check whether an element ancestor is fixed in getScrollableAncestors, which causes only that ancestor to be returned ( Obviously, this is just a small demo and doesn't deal with more complex scenarios / performance etc.)

https://github.com/bbenzikry/dnd-kit/blob/a2cd7052c1cdf04e05af936127650b1dd6db7485/packages/core/src/utilities/scroll/getScrollableAncestors.ts#L22-L26

This makes the following return the expected value for our scenario

dnd-kit/packages/core/src/utilities/rect/getRect.ts

Lines 82 to 84 in d13d284

	const scrollOffsets = getScrollOffsets(scrollableAncestors);
	const top = offsetTop - scrollOffsets.y;

[namroodinc]

Has there been any fixes for this bug?

[joshjg]

Thanks @bbenzikry - I tried the changes from your fork locally and it solved the issues I was having.

[bbenzikry]

Thanks @bbenzikry - I tried the changes from your fork locally and it solved the issues I was having.

Happy to have helped :)

[joshjg]

@bbenzikry @clauderic Any plans to open this fix as a PR? Any help needed?

[bbenzikry]

I don't mind updating my fork and opening a PR as long as there is no objection
Note that my fork is currently based on #54

[cantrellnm]

I needed this working for my own project so I opened PR #415. It's a small fix but should be more flexible than bbenzikry's solution since the fixed node can be at any level of ancestry and have scrollable children. This worked to fix my own issues but I don't know if it will fix all issues related to fixed containers.

[bbenzikry]

@clauderic Can we merge #415? I can only speak for myself - but I'm stuck with my own fork and would really like to be as close as possible to master without worrying about updating from upstream manually

[clauderic]

Fixed by #415

[atanasov-deyan]

Hello @clauderic ,
I might be doing something wrong, but I still can reproduce the issue with the latest version both in our use case , and in the example linked in the initial issue description. I have just forked the sandbox and updated dnd-kit to latest version, but the problem persists: https://codesandbox.io/s/react-dnd-grid-forked-o0vof , so I am kinda unsure whether this issue is fully resolved by #415 . Can someone else also confirm my findings?

[clauderic]

@atanasov-deyan the versions of @dnd-kit that fix this are not published under the latest tag on npm yet, they are tagged with next. You can consume them right away by installing the @dnd-kit packages tagged with next:

npm install @dnd-kit/core@next @dnd-kit/sortable@next

I updated the CodeSandbox with the next packages:
https://codesandbox.io/s/react-dnd-grid-forked-1h9nw?file=/src/App.js:321-333

I think there's still some other issues with that sandbox, but I believe they're related to #43

Follow this PR to know when the next packages will be released under latest:
#342

[atanasov-deyan]

ah, I knew I must be doing something wrong! Thanks for the clarification, @clauderic ! I can confirm that using dnd-kit next solves the problem for our use case, too!

[sbaechler]

For anyone googling this error: The fix has been released in @dnd-kit/core 4.0.0.

[0xtlt]

Hi everyone, I have the same problem with dnd kit/code : "6.0.8"

Am I the only one with the same problem at this version ?

[akodkod]

Unfortunately, I have the same problem. I'm using:

"@dnd-kit/core": "^6.0.8",
"@dnd-kit/sortable": "^7.0.2",