feat(shortcuts): runtime configurable keyboard shortcuts

page/src/insert.rs

@@ -38,4 +38,21 @@ impl<'a, Message: 'static> Insert<'a, Message> {
 
         self
     }
+
+    #[allow(clippy::return_self_not_must_use)]
+    #[allow(clippy::must_use_candidate)]
+    pub fn sub_page_with_id<P: AutoBind<Message>>(&mut self) -> Entity {
+        let sub_page = self.model.register::<P>().id();
+
+        self.model.info[sub_page].parent = Some(self.id);
+
+        self.model
+            .sub_pages
+            .entry(self.id)
+            .expect("parent page missing")
+            .and_modify(|v| v.push(sub_page))
+            .or_insert_with(|| vec![sub_page]);
+
+        sub_page
+    }
 }

page/src/lib.rs

@@ -43,6 +43,11 @@ pub trait Page<Message: 'static>: Downcast {
         None
     }
 
+    /// Set a custom page header
+    fn header(&self) -> Option<Element<'_, Message>> {
+        None
+    }
+
     /// Display an inner app dialog for the page.
     fn dialog(&self) -> Option<Element<'_, Message>> {
         None
@@ -116,6 +121,7 @@ impl Info {
 #[macro_export]
 macro_rules! update {
     ($binder:expr, $message:expr, $page:ty) => {{
+        #[allow(unused_must_use)]
         if let Some(page) = $binder.page_mut::<$page>() {
             page.update($message);
         }