Ported examples 00 and 01 to proc macro interface.

lib/ruin_app/example/01_async_data_and_effects.rs

@@ -0,0 +1,162 @@
+use ruin_app::prelude::*;
+
+#[ruin_runtime::async_main]
+async fn main() -> ruin_app::Result<()> {
+    App::new()
+        .window(
+            Window::new()
+                .title("RUIN Async Data and Effects")
+                .app_id("dev.ruin.async-data")
+                .size(1080.0, 760.0),
+        )
+        .mount(view! {
+            AsyncDataAndEffectsDemo() {}
+        })
+        .run()
+        .await
+}
+
+#[component]
+fn AsyncDataAndEffectsDemo() -> impl IntoView {
+    let selected_path = use_signal(|| "Cargo.toml".to_string());
+    let reload_nonce = use_signal(|| 0_u64);
+    let preview_scroll = use_signal(|| 0.0_f32);
+
+    let file_contents = use_resource({
+        let selected_path = selected_path.clone();
+        let reload_nonce = reload_nonce.clone();
+        move || {
+            let path = selected_path.get();
+            let _ = reload_nonce.get();
+            async move {
+                ruin_runtime::fs::read_to_string(&path)
+                    .await
+                    .map_err(|error| error.to_string())
+            }
+        }
+    });
+
+    use_effect({
+        let selected_path = selected_path.clone();
+        let reload_nonce = reload_nonce.clone();
+        move || {
+            eprintln!(
+                "async resource dependencies changed: path={}, reload={}",
+                selected_path.get(),
+                reload_nonce.get()
+            );
+        }
+    });
+
+    use_effect({
+        let selected_path = selected_path.clone();
+        let reload_nonce = reload_nonce.clone();
+        let preview_scroll = preview_scroll.clone();
+        move || {
+            let _ = selected_path.get();
+            let _ = reload_nonce.get();
+            let _ = preview_scroll.set(0.0);
+        }
+    });
+
+    use_window_title({
+        let selected_path = selected_path.clone();
+        move || format!("RUIN Async Demo ({})", selected_path.get())
+    });
+
+    view! {
+        column(gap = 16.0, padding = 24.0) {
+            text(role = TextRole::Heading(1), size = 32.0, weight = FontWeight::Semibold) {
+                "Async data and effects"
+            }
+
+            text(color = colors::muted(), wrap = TextWrap::Word) {
+                "This is a smaller truthful slice of example 01: local signals drive a real async \
+                 resource, and an effect logs the dependency changes."
+            }
+
+            FileControls(selected_path = selected_path.clone(), reload_nonce = reload_nonce.clone()) {}
+
+            block(
+                padding = 16.0,
+                gap = 10.0,
+                background = surfaces::raised(),
+                border_radius = 12.0,
+            ) {
+                text(size = 18.0) { "selected = "; selected_path.clone() }
+
+                match file_contents.read() {
+                    Pending => view! {
+                        text(color = colors::muted()) {
+                            "Loading file contents..."
+                        }
+                    },
+                    Ready(Ok(contents)) => view! {
+                        column(background = surfaces::raised(), gap = 10.0) {
+                            text() { "bytes = "; contents.len() }
+
+                            scroll_box(
+                                height = 420.0,
+                                offset_y = preview_scroll.clone(),
+                                padding = 12.0,
+                                background = surfaces::canvas(),
+                                border_radius = 10.0,
+                                border = (2.0, colors::muted()),
+                            ) {
+                                text(
+                                    color = colors::muted(),
+                                    font_family = TextFontFamily::Monospace,
+                                ) {
+                                    contents
+                                }
+                            }
+                        }
+                    },
+                    Ready(Err(error)) => view! {
+                        text(color = colors::danger()) { error.to_string() }
+                    },
+                }
+            }
+        }
+    }
+}
+
+#[component]
+fn FileControls(selected_path: Signal<String>, reload_nonce: Signal<u64>) -> impl IntoView {
+    view! {
+        row(gap = 8.0) {
+            button(
+                on_press = {
+                    let selected_path = selected_path.clone();
+                    move |_| {
+                        let _ = selected_path.set("Cargo.toml".to_string());
+                    }
+                },
+            ) {
+                "Cargo.toml"
+            }
+
+            button(
+                on_press = {
+                    let selected_path = selected_path.clone();
+                    move |_| {
+                        let _ = selected_path.set("Cargo.lock".to_string());
+                    }
+                },
+            ) {
+                "Cargo.lock"
+            }
+
+            button(
+                on_press = {
+                    let reload_nonce = reload_nonce.clone();
+                    move |_| {
+                        reload_nonce.update(|value| *value += 1);
+                    }
+                },
+            ) {
+                "Reload"
+            }
+        }
+    }
+}