Awesome
Druid Enums
This allows deriving a Matcher
for any Rust enum.
The Matcher
allows matching a druid::Widget
to each variant of the enum.
Usage
It's not (yet) published on crates.io
, thus it should be used through Git:
[dependencies]
druid-enums = { git = "https://github.com/finnerale/druid-enums" }
Example
Just a sketch, but you can find the fully working example here.
#[derive(Clone, Data, Matcher)]
#[matcher(matcher_name = App)] // defaults to AppStateMatcher
enum AppState {
Login(LoginState),
#[matcher(builder_name = my_main)]
Main(MainState),
}
#[derive(Clone, Data, Lens, Default)]
struct LoginState {
user: String,
}
#[derive(Clone, Data, Lens)]
struct MainState {
user: String,
count: u32,
}
fn main() -> Result<(), PlatformError> {
let window = WindowDesc::new(ui).title("Druid Enums");
let state = AppState::Login(LoginState::default());
AppLauncher::with_window(window)
.use_simple_logger()
.launch(state)
}
fn ui() -> impl Widget<AppState> {
// AppState::matcher() or
App::new()
.login(login_ui())
.my_main(main_ui())
}
fn login_ui() -> impl Widget<LoginState> {
fn login(ctx: &mut EventCtx, state: &mut LoginState, _: &Env) {
ctx.submit_command(LOGIN.with(MainState::from(state.clone())), None)
}
Flex::row()
.with_child(TextBox::new().lens(LoginState::user))
.with_spacer(5.0)
.with_child(Button::new("Login").on_click(login))
.center()
}
fn main_ui() -> impl Widget<MainState> {
Flex::column()
.with_child(Label::dynamic(MainState::welcome_label))
.with_spacer(5.0)
.with_child(
Button::dynamic(MainState::count_label)
.on_click(|_, state, _| state.count += 1),
)
.center()
}