#![cfg_attr(target_family = "wasm", no_main)] use gpui::{    App, Bounds, Context, FocusHandle, Window, WindowBounds, WindowOptions, div, prelude::*, px,    rgb, size,};use gpui::{SharedString, TitlebarOptions};use gpui_platform::application; struct ExampleWindow {    label: SharedString,    focus_handle: FocusHandle,} impl Render for ExampleWindow {    fn render(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {        div()            .track_focus(&self.focus_handle)            .flex()            .flex_col()            .gap_3()            .bg(rgb(0x2e2e2e))            .size_full()            .justify_center()            .items_center()            .p_8()            .text_lg()            .text_color(rgb(0xffffff))            .child(self.label.clone())            .child(                div()                    .text_sm()                    .text_color(rgb(0xb0b0b0))                    .child("Try to drag the titlebar, and check the Window menu."),            )    }} fn open_test_window(    cx: &mut App,    bounds: Bounds<gpui::Pixels>,    label: &str,    is_movable: bool,    appears_transparent: bool,    app_owns_titlebar_drag: bool,) {    let label = SharedString::from(format!(        "{label}\nis_movable: {is_movable}\n\         appears_transparent: {appears_transparent}\n\         app_owns_titlebar_drag: {app_owns_titlebar_drag}"    ));     cx.open_window(        WindowOptions {            window_bounds: Some(WindowBounds::Windowed(bounds)),            is_movable,            app_owns_titlebar_drag,            titlebar: Some(TitlebarOptions {                title: Some(label.clone()),                appears_transparent,                ..Default::default()            }),            ..Default::default()        },        |window, cx| {            cx.new(|cx| {                let focus_handle = cx.focus_handle();                focus_handle.focus(window, cx);                ExampleWindow {                    label,                    focus_handle,                }            })        },    )    .unwrap();} fn run_example() {    application().run(|cx: &mut App| {        let window_size = size(px(420.), px(280.0));        let base = Bounds::centered(None, window_size, cx);         // (label, is_movable, appears_transparent, app_owns_titlebar_drag, col, row)        let windows = [            ("Native titlebar, movable", true, false, false, 0.0, 0.0),            (                "Native titlebar, NOT movable",                false,                false,                false,                1.0,                0.0,            ),            ("Custom titlebar, movable", true, true, false, 0.0, 1.0),            ("Custom titlebar, NOT movable", false, true, false, 1.0, 1.0),        ];         for (label, is_movable, appears_transparent, app_owns_titlebar_drag, col, row) in windows {            let mut bounds = base;            bounds.origin.x += window_size.width * col;            bounds.origin.y += window_size.height * row;            open_test_window(                cx,                bounds,                label,                is_movable,                appears_transparent,                app_owns_titlebar_drag,            );        }    });} #[cfg(not(target_family = "wasm"))]fn main() {    run_example();} #[cfg(target_family = "wasm")]#[wasm_bindgen::prelude::wasm_bindgen(start)]pub fn start() {    gpui_platform::web_init();    run_example();}