use gpui::*; struct HelloWorld { text: SharedString, } impl Render for HelloWorld { fn render(&mut self, _cx: &mut ViewContext) -> impl IntoElement { div() .flex() .bg(rgb(0x2e7d32)) .size(Length::Definite(Pixels(300.0).into())) .justify_center() .items_center() .shadow_lg() .border_1() .border_color(rgb(0x0000ff)) .text_xl() .text_color(rgb(0xffffff)) .child(format!("Hello, {}!", &self.text)) } } fn main() { App::new().run(|cx: &mut AppContext| { let bounds = Bounds::centered(None, size(px(600.0), px(600.0)), cx); cx.open_window( WindowOptions { window_bounds: Some(WindowBounds::Windowed(bounds)), ..Default::default() }, |cx| { cx.new_view(|_cx| HelloWorld { text: "World".into(), }) }, ); }); }