use lv_tui::prelude::*;
use lv_tui::widgets::*;

struct App { pane: SplitPane }

impl App {
    fn new() -> Self {
        Self {
            pane: SplitPane::new()
                .first(
                    Column::new().gap(1)
                        .child(Label::new("左侧面板").style(Style::default().bold()))
                        .child(Label::new("Ctrl+←/→ 调整宽度"))
                        .child(ProgressBar::new().ratio(0.75).width(20))
                )
                .second(
                    Column::new().gap(1)
                        .child(Label::new("右侧面板").style(Style::default().bold()))
                        .child(Checkbox::new("启用功能"))
                        .child(Checkbox::new("自动保存").checked())
                )
                .ratio(40),
        }
    }
}

impl Component for App {
    fn render(&self, cx: &mut RenderCx) { self.pane.render(cx); }
    fn event(&mut self, e: &Event, cx: &mut EventCx) {
        if e.is_key(Key::Char('q')) { cx.quit(); return; }
        if let Event::Key(k) = e {
            if k.key == Key::Char('c') && k.modifiers.ctrl { cx.quit(); return; }
        }
        self.pane.event(e, cx);
    }
    fn layout(&mut self, r: lv_tui::geom::Rect, cx: &mut lv_tui::component::LayoutCx) { self.pane.layout(r, cx); }
    fn measure(&self, c: lv_tui::layout::Constraint, _cx: &mut lv_tui::component::MeasureCx) -> lv_tui::geom::Size {
        lv_tui::geom::Size { width: c.max.width, height: c.max.height }
    }
    fn for_each_child(&self, f: &mut dyn FnMut(&lv_tui::node::Node)) { self.pane.for_each_child(f); }
    fn for_each_child_mut(&mut self, f: &mut dyn FnMut(&mut lv_tui::node::Node)) { self.pane.for_each_child_mut(f); }
    fn focusable(&self) -> bool { false }
}

fn main() -> lv_tui::Result<()> {
    lv_tui::app::App::new(App::new()).run()
}
