DragLine remains visible even when canDropForeignDragObject returns false

[francesc79]

Describe the bug
When canDropForeignDragObject returns false, the drag operation stops correctly, but the DragLine remains visible. Additionally, tree.getDragLineStyle() still returns style data, resulting in inconsistent visual feedback.

To Reproduce

1. Clone or open this repo
2. Drag the "Drag me into the tree!" box onto the tree
3. canDropForeignDragObject returns false
4. The drag line still appears and doesn't disappear

Expected behavior
The DragLine should not be rendered when the drop is not allowed, and getDragLineStyle() should return null or no style.

Screenshots

[lukasbach]

Thanks for the report and the reproduction, that was very helpful to understand the culprit. I've made some additions that should hopefully fix the issue for you.

The change is released as snapshot, can can be pulled with npm i @headless-tree/core@snapshot @headless-tree/react@snapshot. It will become available in the next latest release.

[francesc79]

Thanks @lukasbach

[lukasbach]

The related change has been properly released, I'll close this. Please reopen or create a new ticket if something else comes up. Thanks!