bevy/examples/helpers
robtfm b641aa0ecf
separate border colors (#18682)
# Objective

allow specifying the left/top/right/bottom border colors separately for
ui elements

fixes #14773

## Solution

- change `BorderColor` to 
```rs
pub struct BorderColor {
    pub left: Color,
    pub top: Color,
    pub right: Color,
    pub bottom: Color,
}
```
- generate one ui node per distinct border color, set flags for the
active borders
- render only the active borders

i chose to do this rather than adding multiple colors to the
ExtractedUiNode in order to minimize the impact for the common case
where all border colors are the same.

## Testing

modified the `borders` example to use separate colors:


![image](https://github.com/user-attachments/assets/5d9a4492-429a-4ee1-9656-215511886164)

the behaviour is a bit weird but it mirrors html/css border behaviour.

---

## Migration:

To keep the existing behaviour, just change `BorderColor(color)` into
`BorderColor::all(color)`.

---------

Co-authored-by: ickshonpe <david.curthoys@googlemail.com>
2025-05-26 16:57:13 +00:00
..
camera_controller.rs Add examples/helpers/* as library examples (#18288) 2025-03-13 16:34:16 +00:00
widgets.rs separate border colors (#18682) 2025-05-26 16:57:13 +00:00