lv-tui 0.2.0

/// RFC 23 验收 example — Timer / Tick events

use lv_tui::prelude::*;
use lv_tui::Component;
use lv_tui::widgets::Column;

#[derive(Component)]
struct Blinker {
    #[reactive(paint, copy)]
    visible: bool,
}

impl Blinker {
    fn new() -> Self { Self { visible: true } }

    fn render(&self, cx: &mut RenderCx) {
        if self.get_visible() {
            cx.line("*** BLINK ***");
        } else {
            cx.line("             ");
        }
    }

    fn event(&mut self, event: &Event, cx: &mut EventCx) {
        if event.is_key(Key::Char('q')) { cx.quit(); }
        if matches!(event, Event::Tick) && cx.phase() == EventPhase::Target {
            self.set_visible(!self.get_visible(), cx);
        }
    }
}

struct Root { body: Column }

impl Root {
    fn new(body: Column) -> Self { Self { body } }
}

impl Component for Root {
    fn render(&self, cx: &mut RenderCx) { self.body.render(cx); }
    fn layout(&mut self, r: Rect, cx: &mut LayoutCx) { self.body.layout(r, cx); }
    fn focusable(&self) -> bool { false }
    fn event(&mut self, e: &Event, cx: &mut EventCx) {
        if e.is_key(Key::Char('q')) { cx.quit(); }
        self.body.event(e, cx);
    }
    fn for_each_child(&self, f: &mut dyn FnMut(&Node)) { self.body.for_each_child(f); }
    fn for_each_child_mut(&mut self, f: &mut dyn FnMut(&mut Node)) { self.body.for_each_child_mut(f); }
}

fn main() -> lv_tui::Result<()> {
    let body = Column::new()
        .padding(1).gap(1)
        .child(lv_tui::widgets::Label::new("=== Timer Demo ==="))
        .child(Blinker::new())
        .child(lv_tui::widgets::Label::new("press q to quit"));

    lv_tui::app::App::new(Root::new(body)).run()
}