This example demonstrates how to use Ratatui with widgets that fetch
data asynchronously. It uses the `octocrab` crate to fetch a list of
pull requests from the GitHub API. You will need an environment
variable named `GITHUB_TOKEN` with a valid GitHub personal access
token. The token does not need any special permissions.
Co-authored-by: Dheepak Krishnamurthy <me@kdheepak.com>
big_text.rs was a copy of the code from tui-big-text and was getting
gradually out of sync with the original crate. It was also rendering
something a bit different than the Ratatui logo. This commit replaces
the big_text.rs file with a much smaller string representation of the
Ratatui logo.
This is a simplification of the public API that is helpful for new users
that are not familiar with how rust re-exports work, and helps avoid
clashes with other modules in the backends that are named terminal.
BREAKING CHANGE: The `terminal` module is now private and can not be
used directly. The types under this module are exported from the root of
the crate.
```diff
- use ratatui::terminal::{CompletedFrame, Frame, Terminal, TerminalOptions, ViewPort};
+ use ratatui::{CompletedFrame, Frame, Terminal, TerminalOptions, ViewPort};
```
Fixes: https://github.com/ratatui-org/ratatui/issues/1210
Layout::init_cache no longer returns bool and takes a NonZeroUsize instead of usize
The cache is a thread-local, so doesn't make much sense to require
synchronized initialization.
Consensus is that explicit imports make it easier to understand the
example code. This commit removes the prelude import from all examples
and replaces it with the necessary imports, and expands other glob
imports (widget::*, Constraint::*, KeyCode::*, etc.) everywhere else.
Prelude glob imports not in examples are not covered by this PR.
See https://github.com/ratatui-org/ratatui/issues/1150 for more details.
`crossterm`, `termion`, and `termwiz` can now be accessed as
`ratatui::{crossterm, termion, termwiz}` respectively. This makes it
possible to just add the Ratatui crate as a dependency and use the
backend of choice without having to add the backend crates as
dependencies.
To update existing code, replace all instances of `crossterm::` with
`ratatui::crossterm::`, `termion::` with `ratatui::termion::`, and
`termwiz::` with `ratatui::termwiz::`.
Simplify the List example by removing lifetimes not strictly necessary
to demonstrate how Ratatui lists work. Instead, the sample strings are
copied into each `TodoItem`. To further simplify, I changed the code to
use a new TodoItem::new function, rather than an implementation of the
`From` trait.
Using reset is clearer to me what actually happens. On the other case a
struct is created to override the old one completely which basically
does the same in a less clear way.
- Simplify `assert_buffer_eq!` logic.
- Deprecate `assert_buffer_eq!`.
- Introduce `TestBackend::assert_buffer_lines`.
Also simplify many tests involving buffer comparisons.
For the deprecation, just use `assert_eq` instead of `assert_buffer_eq`:
```diff
-assert_buffer_eq!(actual, expected);
+assert_eq!(actual, expected);
```
---
I noticed `assert_buffer_eq!` creating no test coverage reports and
looked into this macro. First I simplified it. Then I noticed a bunch of
`assert_eq!(buffer, …)` and other indirect usages of this macro (like
`TestBackend::assert_buffer`).
The good thing here is that it's mainly used in tests so not many
changes to the library code.
`Block::bordered()` is shorter than
`Block::new().borders(Borders::ALL)`, requires one less import
(`Borders`) and in case `Block::default()` was used before can even be
`const`.
This is the proposed solution for issue #1068. It solves the bug in the
user_input example with multi-byte UTF-8 characters as input.
Fixes: #1068
---------
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
With the Rust method naming conventions these methods are into methods
consuming the Span. Therefore, it's more consistent to use `into_`
instead of `to_`.
```rust
Span::to_centered_line
Span::to_left_aligned_line
Span::to_right_aligned_line
```
Are marked deprecated and replaced with the following
```rust
Span::into_centered_line
Span::into_left_aligned_line
Span::into_right_aligned_line
```
Fixes many not yet enabled lints (mostly pedantic) on everything that is
not the lib (examples, benchs, tests). Therefore, this is not containing
anything that can be a breaking change.
Lints are not enabled as that should be the job of #974. I created this
as a separate PR as its mostly independent and would only clutter up the
diff of #974 even more.
Also see
https://github.com/ratatui-org/ratatui/pull/974#discussion_r1506458743
---------
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
In a recent commit we added Rec::split, but this feels more ergonomic as
Layout::areas. This also adds Layout::spacers to get the spacers between
the areas.
Here's a constraint explorer demo put together with @joshka
https://github.com/ratatui-org/ratatui/assets/1813121/08d7d8f6-d013-44b4-8331-f4eee3589cce
It allows users to interactive explore how the constraints behave with
respect to each other and compare that across flex modes. It allows
users to swap constraints out for other constraints, increment or
decrement the values, add and remove constraints, and add spacing
It is also a good example for how to structure a simple TUI with several
Ratatui code patterns that are useful for refactoring.
Fixes: https://github.com/ratatui-org/ratatui/issues/792
---------
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
This PR makes a number of simplifications to the layout and constraint
features that were added after v0.25.0.
For users upgrading from v0.25.0, the net effect of this PR (along with
the other PRs) is the following:
- New `Flex` modes have been added.
- `Flex::Start` (new default)
- `Flex::Center`
- `Flex::End`
- `Flex::SpaceAround`
- `Flex::SpaceBetween`
- `Flex::Legacy` (old default)
- `Min(v)` grows to allocate excess space in all `Flex` modes instead of
shrinking (except in `Flex::Legacy` where it retains old behavior).
- `Fill(1)` grows to allocate excess space, growing equally with
`Min(v)`.
---
The following contains a summary of the changes in this PR and the
motivation behind them.
**`Flex`**
- Removes `Flex::Stretch`
- Renames `Flex::StretchLast` to `Flex::Legacy`
**`Constraint`**
- Removes `Fixed`
- Makes `Min(v)` grow as much as possible everywhere (except
`Flex::Legacy` where it retains the old behavior)
- Makes `Min(v)` grow equally as `Fill(1)` while respecting `Min` lower
bounds. When `Fill` and `Min` are used together, they both fill excess
space equally.
Allowing `Min(v)` to grow still allows users to build the same layouts
as before with `Flex::Start` with no breaking changes to the behavior.
This PR also removes the unstable feature `SegmentSize`.
This is a breaking change to the behavior of constraints. If users want
old behavior, they can use `Flex::Legacy`.
```rust
Layout::vertical([Length(25), Length(25)]).flex(Flex::Legacy)
```
Users that have constraint that exceed the available space will probably
not see any difference or see an improvement in their layouts. Any
layout with `Min` will be identical in `Flex::Start` and `Flex::Legacy`
so any layout with `Min` will not be breaking.
Previously, `Table` used `EvenDistribution` internally by default, but
with that gone the default is now `Flex::Start`. This changes the
behavior of `Table` (for the better in most cases). The only way for
users to get exactly the same as the old behavior is to change their
constraints. I imagine most users will be happier out of the box with
the new Table default.
Resolves https://github.com/ratatui-org/ratatui/issues/843
Thanks to @joshka for the direction
Follow up to https://github.com/ratatui-org/ratatui/pull/783
This PR introduces different priorities for each kind of constraint.
This PR also adds tests that specifies this behavior. This PR resolves a
number of broken tests.
Fixes https://github.com/ratatui-org/ratatui/issues/827
With this PR, the layout algorithm will do the following in order:
1. Ensure that all the segments are within the user provided area and
ensure that all segments and spacers are aligned next to each other
2. if a user provides a `layout.spacing`, it will enforce it.
3. ensure proportional elements are all proportional to each other
4. if a user provides a `Fixed(v)` constraint, it will enforce it.
5. `Min` / `Max` binding inequality constraints
6. `Length`
7. `Percentage`
8. `Ratio`
9. collapse `Min` or collapse `Max`
10. grow `Proportional` as much as possible
11. grow spacers as much as possible
This PR also returns the spacer areas as `Rects` to the user. Users can
then draw into the spacers as they see fit (thanks @joshka for the
idea). Here's a screenshot with the modified flex example:
<img width="569" alt="image"
src="https://github.com/ratatui-org/ratatui/assets/1813121/46c8901d-882c-43b0-ba87-b1d455099d8f">
This PR introduces a `strengths` module that has "default" weights that
give stable solutions as well as predictable behavior.
- colored gauges
- removed box borders
- show the difference between ratio / percentage and unicode / no unicode better
- better application approach (consistent with newer examples)
- various changes for 0.26 featuers
- impl `Widget` for `&App`
- use color_eyre
for gauge.tape
- change to get better output from the new code
---------
Fixes: https://github.com/ratatui-org/ratatui/issues/846
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
