main-window: Replace AdwViewSwitcherTitle

https://gnome.pages.gitlab.gnome.org/libadwaita/doc/main/migrating-to-breakpoints.html#replace-adwviewswitchertitle

Part-of: <https://gitlab.gnome.org/GNOME/calls/-/merge_requests/714>

src/calls-main-window.c

@@ -417,21 +417,6 @@ dispose (GObject *object)
 }
 
 
-static void
-size_allocate (GtkWidget     *widget,
-               int            width,
-               int            height,
-               int            baseline)
-{
-  CallsMainWindow *self = CALLS_MAIN_WINDOW (widget);
-
-  adw_view_switcher_title_set_view_switcher_enabled (self->title_switcher,
-                                                     width > 400);
-
-  GTK_WIDGET_CLASS (calls_main_window_parent_class)->size_allocate (widget, width, height, baseline);
-}
-
-
 static void
 calls_main_window_class_init (CallsMainWindowClass *klass)
 {
@@ -452,11 +437,8 @@ calls_main_window_class_init (CallsMainWindowClass *klass)
   g_object_class_install_properties (object_class, PROP_LAST_PROP, props);
 
 
-  widget_class->size_allocate = size_allocate;
-
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/Calls/ui/main-window.ui");
   gtk_widget_class_bind_template_child (widget_class, CallsMainWindow, toast_overlay);
-  gtk_widget_class_bind_template_child (widget_class, CallsMainWindow, title_switcher);
   gtk_widget_class_bind_template_child (widget_class, CallsMainWindow, main_stack);
   gtk_widget_class_bind_template_child (widget_class, CallsMainWindow, permanent_error_revealer);
   gtk_widget_class_bind_template_child (widget_class, CallsMainWindow, permanent_error_label);

src/ui/main-window.ui

@@ -6,15 +6,23 @@
     <property name="title" translatable="yes">Calls</property>
     <property name="show_menubar">False</property>
     <property name="hide-on-close">True</property>
+    <property name="width-request">360</property>
+    <property name="height-request">294</property>
+    <child>
+      <object class="AdwBreakpoint">
+        <condition>max-width: 450sp</condition>
+        <setter object="header_bar" property="title-widget"/>
+        <setter object="switcher_bar" property="reveal">True</setter>
+      </object>
+    </child>
     <child>
       <object class="AdwToolbarView">
         <child type="top">
-          <object class="AdwHeaderBar">
+          <object class="AdwHeaderBar" id="header_bar">
-            <property name="centering_policy">strict</property>
             <child type="title">
-              <object class="AdwViewSwitcherTitle" id="title_switcher">
+              <object class="AdwViewSwitcher" id="title_switcher">
+                <property name="policy">wide</property>
                 <property name="stack">main_stack</property>
-                <property name="title" bind-source="CallsMainWindow" bind-property="title" bind-flags="sync-create"/>
               </object>
             </child>
             <child type="end">
@@ -55,7 +63,6 @@
                 <child>
                   <object class="AdwViewSwitcherBar" id="switcher_bar">
                     <property name="stack">main_stack</property>
-                    <property name="reveal" bind-source="title_switcher" bind-property="title-visible" bind-flags="sync-create"/>
                   </object>
                 </child>
               </object>