This commit adds `scroll` to the flex example. It also adds more examples to showcase how constraints interact. It improves the UI to make it easier to understand and short terminal friendly.
<img width="380" alt="image" src="https://github.com/ratatui-org/ratatui/assets/1813121/30541efc-ecbe-4e28-b4ef-4d5f1dc63fec"/>
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Co-authored-by: Dheepak Krishnamurthy <me@kdheepak.com>
This PR adds a new way to space elements in a `Layout`.
Loosely based on
[flexbox](https://css-tricks.com/snippets/css/a-guide-to-flexbox/), this
PR adds a `Flex` enum with the following variants:
- Start
- Center
- End
- SpaceAround
- SpaceBetween
<img width="380" alt="image" src="https://github.com/ratatui-org/ratatui/assets/1813121/b744518c-eae7-4e35-bbc4-fe3c95193cde">
It also adds two more variants, to make this backward compatible and to
make it replace `SegmentSize`:
- StretchLast (default in the `Flex` enum, also behavior matches old
default `SegmentSize::LastTakesRemainder`)
- Stretch (behavior matches `SegmentSize::EvenDistribution`)
The `Start` variant from above matches `SegmentSize::None`.
This allows `Flex` to be a complete replacement for `SegmentSize`, hence
this PR also deprecates the `segment_size` constructor on `Layout`.
`SegmentSize` is still used in `Table` but under the hood `segment_size`
maps to `Flex` with all tests passing unchanged.
I also put together a simple example for `Flex` layouts so that I could
test it visually, shared below:
https://github.com/ratatui-org/ratatui/assets/1813121/c8716c59-493f-4631-add5-feecf4bd4e06
