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# Objective Changes discussed with cart: - `:` will not be called "inheritance" anymore, but instead "cacheable" (name not final) - the Template patching prefix changes `@` -> `~` - the SceneComponent prefix changes `:` -> `@` - the `:` prefix is allowed in front of `@SceneComponent` as well, marking it as being cached >> me: do we forbid caching of functions which take an argument? > cart: We should forbid it until we support it, and I don't plan on supporting this in the short term, as it adds new controversial design aspects to the system (building a mapping from parameters to cached scenes, ensuring the parameters are all hashable, etc). Link to the discord thread, specifically my [recap message](https://discord.com/channels/691052431525675048/1264881140007702558/1506422311056576702). The exact reasoning is in the linked discord discussion, but the tldr is: "Inheritance" as a term for the ":" syntax didn't really fit what bsn was doing, since scenes without `:` produce the same result. All `:` is, is a way to say "cache this pls" with the design of bsn imposing the limitation that only the first scene can be cached That was all fine, except for one case: Disambiguating SceneComponents from normal components. So if we redefine `:` to just mean "caching" we needed to untangle it from SceneComponents. That means disambiguating SceneComponents needed a different syntax, and the decision ended up being to take the @ prefix from the *much* less common `@Template` usecase, since `SceneComponent {@prop: val}` already used @ as well and introduce a new prefix to replace `@Template` instead, replacing it with `~Template`. ## Solution Implement these changes in macros. Notably, this *still* doesn't implement/enable caching right now. Most docs are updated, except for the big blocks in `bevy_scene/src/lib.rs` and `bevy_scene/macros/src/lib.rs` since i've been working on reworking those on another branch and didn't want to duplicate whats already been a lot of work and likely to be a bunch more ## Testing - [x] `bevy_scene` tests passing - [x] `cargo check --workspace` and `cargo check --workspace --examples` passing Since this PR does not yet enable caching, I think passing the current tests should be enough. --------- Co-authored-by: Carter Anderson <mcanders1@gmail.com> Co-authored-by: François Mockers <francois.mockers@vleue.com>
69 lines
1.9 KiB
Rust
69 lines
1.9 KiB
Rust
//! Virtual keyboard example
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use bevy::{
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color::palettes::css::NAVY,
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feathers::{
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controls::{VirtualKeyPressed, VirtualKeyboard},
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dark_theme::create_dark_theme,
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theme::UiTheme,
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FeathersPlugins,
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},
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prelude::*,
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};
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fn main() {
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App::new()
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.add_plugins((DefaultPlugins, FeathersPlugins))
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.insert_resource(UiTheme(create_dark_theme()))
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.add_systems(Startup, scene.spawn())
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.run();
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}
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fn on_virtual_key_pressed(virtual_key_pressed: On<VirtualKeyPressed<&'static str>>) {
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println!("key pressed: {}", virtual_key_pressed.key);
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}
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fn scene() -> impl SceneList {
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bsn_list![Camera2d, keyboard()]
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}
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fn keyboard() -> impl Scene {
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let keys = [
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vec!["1", "2", "3", "4", "5", "6", "7", "8", "9", "0", ".", ","],
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vec!["Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P"],
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vec!["A", "S", "D", "F", "G", "H", "J", "K", "L", "'"],
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vec!["Z", "X", "C", "V", "B", "N", "M", "-", "/"],
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vec!["space", "enter", "backspace"],
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vec!["left", "right", "up", "down", "home", "end"],
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];
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bsn! {
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Node {
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width: percent(100),
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height: percent(100),
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align_items: AlignItems::End,
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justify_content: JustifyContent::Center,
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}
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Children [(
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Node {
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flex_direction: FlexDirection::Column,
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border: px(5),
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row_gap: px(5),
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padding: px(5),
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align_items: AlignItems::Center,
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margin: px(25),
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border_radius: BorderRadius::all(px(10)),
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}
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BackgroundColor(NAVY)
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BorderColor::all(Color::WHITE)
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Children [
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Text("virtual keyboard"),
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(
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@VirtualKeyboard::<&str> { @keys: keys }
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on(on_virtual_key_pressed)
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)
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]
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)]
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}
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}
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