Integrate Headerbar to MainWindow (#425)

* Headerbar: rewrite in gobject style, code style, etc

* Header is sealed in GTK4

* Headerbar doesn't need to be public get

---------

Co-authored-by: Stanisław <6031763+stsdc@users.noreply.github.com>

Author: danirabbit

po/POTFILES

@@ -16,7 +16,6 @@ src/Views/SystemView/SystemMemoryView.vala
 src/Views/SystemView/SystemNetworkView.vala
 src/Views/SystemView/SystemStorageView.vala
 src/Views/SystemView/SystemGPUView.vala
-src/Widgets/Headerbar/Headerbar.vala
 src/Widgets/Headerbar/Search.vala
 src/Widgets/Statusbar/Statusbar.vala
 src/Widgets/WidgetResource/WidgetResource.vala

src/MainWindow.vala

@@ -10,7 +10,7 @@ public class Monitor.MainWindow : Hdy.ApplicationWindow {
     private Resources resources;
 
     // Widgets
-    public Headerbar headerbar;
+    public Search search { get; private set; }
 
     public ProcessView process_view;
     public SystemView system_view;
@@ -46,12 +46,37 @@ public class Monitor.MainWindow : Hdy.ApplicationWindow {
         stack_switcher.valign = Gtk.Align.CENTER;
         stack_switcher.set_stack (stack);
 
-        headerbar = new Headerbar (this);
-        headerbar.set_custom_title (stack_switcher);
         var sv = new PreferencesView ();
-        headerbar.preferences_grid.add (sv);
         sv.show_all ();
 
+        var preferences_popover = new Gtk.Popover (null) {
+            child = sv
+        };
+
+        var preferences_button = new Gtk.MenuButton () {
+            image = new Gtk.Image.from_icon_name ("open-menu", Gtk.IconSize.LARGE_TOOLBAR),
+            popover = preferences_popover,
+            tooltip_text = (_("Settings"))
+        };
+
+        search = new Search (this) {
+            valign = CENTER
+        };
+
+        var search_revealer = new Gtk.Revealer () {
+            child = search,
+            transition_type = SLIDE_LEFT
+        };
+
+        var headerbar = new Hdy.HeaderBar () {
+            has_subtitle = false,
+            show_close_button = true,
+            title = _("Monitor")
+        };
+        headerbar.pack_start (search_revealer);
+        headerbar.set_custom_title (stack_switcher);
+        headerbar.pack_end (preferences_button);
+
         statusbar = new Statusbar ();
 
         var grid = new Gtk.Grid () {
@@ -68,9 +93,9 @@ public class Monitor.MainWindow : Hdy.ApplicationWindow {
 
         dbusserver = DBusServer.get_default ();
 
-        headerbar.search_revealer.set_reveal_child (stack.visible_child_name == "process_view");
+        search_revealer.set_reveal_child (stack.visible_child_name == "process_view");
         stack.notify["visible-child-name"].connect (() => {
-            headerbar.search_revealer.set_reveal_child (stack.visible_child_name == "process_view");
+            search_revealer.set_reveal_child (stack.visible_child_name == "process_view");
         });
 
         new Thread<void> ("upd", () => {

src/Services/Shortcuts.vala

@@ -15,15 +15,15 @@ public class Monitor.Shortcuts : Object {
         handled = false;
         char typed = e.str[0];
 
-        if (typed.isalnum () && !window.headerbar.search.is_focus) {
-            window.headerbar.search.activate_entry (e.str);
+        if (typed.isalnum () && !window.search.is_focus) {
+            window.search.activate_entry (e.str);
             handled = true;
         }
 
         if ((e.state & Gdk.ModifierType.CONTROL_MASK) != 0) {
             switch (e.keyval) {
             case Gdk.Key.f:
-                window.headerbar.search.activate_entry ();
+                window.search.activate_entry ();
                 handled = true;
                 break;
             case Gdk.Key.e:

src/Widgets/Headerbar/Headerbar.vala

@@ -28,7 +28,6 @@ source_app_files = [
     'Views/ProcessView/ProcessInfoView/OpenFilesTreeView.vala',
 
     # Widgets
-    'Widgets/Headerbar/Headerbar.vala',
     'Widgets/Headerbar/Search.vala',
     'Widgets/Statusbar/Statusbar.vala',
     'Widgets/Labels/LabelVertical.vala',