This change simplifys UI code that uses the Frame type. E.g.:
```rust
fn draw<B: Backend>(frame: &mut Frame<B>) {
// ...
}
```
Frame was generic over Backend because it stored a reference to the
terminal in the field. Instead it now directly stores the viewport area
and current buffer. These are provided at creation time and are valid
for the duration of the frame.
BREAKING CHANGE: Frame is no longer generic over Backend. Code that
accepted `Frame<Backend>` will now need to accept `Frame`. To migrate
existing code, remove any generic parameters from code that uses an
instance of a Frame. E.g. the above code becomes:
```rust
fn draw(frame: &mut Frame) {
// ...
}
```
Although the `Stylize` trait is already implemented for `&str` which
extends to `String`, it is not implemented for `String` itself. This
commit adds an impl of Stylize that returns a Span<'static> for `String`
so that code can call Stylize methods on temporary `String`s.
E.g. the following now compiles instead of failing with a compile error
about referencing a temporary value:
let s = format!("hello {name}!", "world").red();
BREAKING CHANGE: This may break some code that expects to call Stylize
methods on `String` values and then use the String value later. This
will now fail to compile because the String is consumed by set_style
instead of a slice being created and consumed.
This can be fixed by cloning the `String`. E.g.:
let s = String::from("hello world");
let line = Line::from(vec![s.red(), s.green()]); // fails to compile
let line = Line::from(vec![s.clone().red(), s.green()]); // works
The track symbol is now optional, simplifying composition with other
widgets.
BREAKING_CHANGE: The `track_symbol` needs to be set in the following way
now:
```
let scrollbar = Scrollbar::default().track_symbol(Some("-"));
```
The symbols and sets are moved from `widgets::scrollbar` to
`symbols::scrollbar`. This makes it consistent with the other symbol
sets and allows us to make the scrollbar module private rather than
re-exporting it.
BREAKING CHANGE: The symbols are now in the `symbols` module. To update
your code, add an import for `ratatui:🔣:scrollbar::*` (or the
specific symbols you need). The scrollbar module is no longer public. To
update your code, remove any `widgets::scrollbar` imports and replace it
with `ratatui::widgets::Scrollbar`.
This commit adds a readme to the examples directory with gifs of each
example. This should make it easier to see what each example does
without having to run it.
I modified the examples to fit better in the gifs. Mostly this was just
removing the margins, but for the block example I cleaned up the code a
bit to make it more readable and changed it so the background bug is not
triggered.
For the table example, the combination of Min, Length, and Percent
constraints was causing the table to panic when the terminal was too
small. I changed the example to use the Max constraint instead of the
Length constraint.
The layout example now shows information about how the layout is
constrained on each block (which is now a paragraph with a block).
This helps to keep the prelude small and less likely to conflict with
other crates.
- remove widgets module from prelude as the entire module can be just as
easily imported with `use ratatui::widgets::*;`
- move prelude module into its own file
- update examples to import widgets module instead of just prelude
- added several modules to prelude to make it possible to qualify
imports that collide with other types that have similar names
Represents a scrollbar widget that renders a track, thumb and arrows
either horizontally or vertically. State is kept in ScrollbarState, and
passed as a parameter to the render function.
