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.
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>
Many widgets can be rendered without changing their state.
This commit implements The `Widget` trait for references to
widgets and changes their implementations to be immutable.
This allows us to render widgets without consuming them by passing a ref
to the widget when calling `Frame::render_widget()`.
```rust
// this might be stored in a struct
let paragraph = Paragraph::new("Hello world!");
let [left, right] = area.split(&Layout::horizontal([20, 20]));
frame.render_widget(¶graph, left);
frame.render_widget(¶graph, right); // we can reuse the widget
```
Implemented for all widgets except BarChart (which has an implementation
that modifies the internal state and requires a rewrite to fix.
Other widgets will be implemented in follow up commits.
Fixes: https://github.com/ratatui-org/ratatui/discussions/164
Replaces PRs: https://github.com/ratatui-org/ratatui/pull/122 and
https://github.com/ratatui-org/ratatui/pull/16
Enables: https://github.com/ratatui-org/ratatui/issues/132
Validated as a viable working solution by:
https://github.com/ratatui-org/ratatui/pull/836
