feat(titlebar): add custom titlebar with headermenu

to squash

src/view/ui.rs

@@ -1,5 +1,6 @@
 use crate::model::builder_traits::*;
 
+use adw::HeaderBar;
 use gtk4 as gtk;
 
 use gtk::{prelude::*, StackTransitionType::SlideLeftRight, *};
@@ -7,6 +8,7 @@ use info_bar::InfoBar;
 
 #[allow(unused)]
 use crate::view::{
+    components::{about::open_about_dialogue, info_bar::InfoBar, menu::HeaderMenu, pages::Pages},
     pages::*,
     properties::*,
 };
@@ -52,13 +54,35 @@ pub fn ui(application: &adw::Application) {
     application_box.append(info_bar.get());
     application_box.append(pages.get());
 
+    let title_bar = Box::new(Orientation::Horizontal, 0);
+
+    let mut menu_button = HeaderMenu::<&str>::new();
+
+    menu_button.set_action_group_name(Some("menu_group_action"));
+    menu_button.append_items([(open_about_dialogue, "about_software", "О программе")]);
+
+    title_bar.append(
+        &Label::builder()
+            .css_name("title")
+            .set_align(Alignment::new(Align::Center, Align::Center))
+            .hexpand(true)
+            .vexpand(true)
+            .label("Комплексная программа для лаб. работ")
+            .build(),
+    );
+    title_bar.append(menu_button.get_button());
+
+    let header_bar = HeaderBar::builder().title_widget(&title_bar).build();
+
     let window = ApplicationWindow::builder()
-        .title("Комплексная программа для лаб. работ")
         .width_request(800)
         .height_request(600)
         .application(application)
+        .titlebar(&header_bar)
         .child(&application_box)
         .build();
 
+    window.insert_action_group("menu_group_action", Some(menu_button.get_actions_group()));
+
     window.present();
 }