bevy/release-content/migration-guides/dragenter_includes_dragged_entity.md
universe 5117e6fd49
don't filter dragged entity out of DragEnter events (#19179)
## produce a DragEnter event when reentering the dragged entity

when making a piano, i want dragging across the keys to trigger the
notes of each key, but currently if i drag out of a key, then back to
it, this will not work since the dragged entity gets filtered out

## Solution

- make DragEnter event work whenever there's an entry. if the user wants
to ignore the dragged entity they can compare `target` and `dragged`

## Testing

- tested this with a modified version of the 2d_shapes example. i added
an observer to the entities: (and added mesh picking plugin)
```rust
.observe(|t: Trigger<Pointer<DragEnter>>| {
    info!("entered {}, started from {}", t.target(), t.dragged);
}
```
- i'm not sure if other things need more testing, or if this is wrong
completely and breaks other things i don't know of!

---

## Showcase

before:


https://github.com/user-attachments/assets/48de606a-e44d-4ca1-ae16-d8dcef640d6e

after:


https://github.com/user-attachments/assets/b1be231f-c826-47bc-be43-c637f22e7846
2025-05-26 17:56:54 +00:00

299 B

title pull_requests
DragEnter now includes the dragged entity
19179

DragEnter events are now triggered when entering any entity, even the originally dragged one. This makes the behavior more consistent.

The old behavior can be achieved by checking if trigger.target != trigger.dragged