bevy/crates/bevy_core_widgets
ickshonpe c0fa10b0c3
slider widget track click position UiScale fix (#19676)
# Objective

The position for track clicks in `core_slider` is calculated incorrectly
when using `UiScale`.

## Solution

`trigger.event().pointer_location.position` uses logical window
coordinates, that is:

`position = physical_position / window_scale_factor`

while `ComputedNodeTarget::scale_factor` returns the window scale factor
multiplied by Ui Scale:

`target_scale_factor = window_scale_factor * ui_scale`

So to get the physical position need to divide by the `UiScale`:

```
position * target_scale_factor / ui_scale
= (physical_postion / window_scale_factor) * (window_scale_factor * ui_scale) / ui_scale
=  physical_position
```

I thought this was fixed during the slider PR review, but must have got
missed somewhere or lost in a merge.

## Testing

Can test using the `core_widgets` example` with
`.insert_resource(UiScale(2.))` added to the bevy app.
2025-06-16 22:07:54 +00:00
..
src slider widget track click position UiScale fix (#19676) 2025-06-16 22:07:54 +00:00
Cargo.toml Core slider (#19584) 2025-06-15 00:53:31 +00:00