library: Add Actions Rust demo (#806)

Author: Hofer-Julian

src/Library/demos/Actions/code.rs

@@ -0,0 +1,48 @@
+use crate::workbench;
+use gtk::gio;
+use gtk::prelude::*;
+
+pub fn main() {
+    let demo: adw::StatusPage = workbench::builder().object("demo").unwrap();
+    let demo_group = gio::SimpleActionGroup::new();
+    demo.insert_action_group("demo", Some(&demo_group));
+
+    // Action with no state or parameters
+    let simple_action = gio::SimpleAction::new("simple", None);
+
+    simple_action.connect_activate(|action, _| {
+        println!("{} action activated", action.name());
+    });
+    demo_group.add_action(&simple_action);
+
+    // Action with parameter
+    let bookmarks_action =
+        gio::SimpleAction::new("open-bookmarks", Some(&str::static_variant_type()));
+    bookmarks_action.connect_activate(|action, parameter| {
+        println!("{} activated with {}", action.name(), parameter.unwrap());
+    });
+    demo_group.add_action(&bookmarks_action);
+
+    // Action with state
+    let toggle_action = gio::SimpleAction::new_stateful("toggle", None, &false.to_variant());
+    toggle_action.connect_notify(Some("state"), |action, _| {
+        println!("{} set to {}", action.name(), action.state().unwrap());
+    });
+    demo_group.add_action(&toggle_action);
+
+    // Action with state and parameter
+    let scale_action = gio::SimpleAction::new_stateful(
+        "scale",
+        Some(&str::static_variant_type()),
+        &"100%".to_variant(),
+    );
+    scale_action.connect_notify(Some("state"), |action, _| {
+        println!("{} set to {}", action.name(), action.state().unwrap());
+    });
+    demo_group.add_action(&scale_action);
+
+    // Property action
+    let text: gtk::Label = workbench::builder().object("text").unwrap();
+    let alignment_action = gio::PropertyAction::new("text-align", &text, "halign");
+    demo_group.add_action(&alignment_action);
+}