malcontent-control: Use HdyWindow and HdyHeaderBar

malcontent-control/application.c

@@ -27,6 +27,7 @@
 #include <glib/gi18n-lib.h>
 #include <gio/gio.h>
 #include <gtk/gtk.h>
+#include <libhandy-1/handy.h>
 #include <libmalcontent-ui/malcontent-ui.h>
 #include <polkit/polkit.h>
 
@@ -250,6 +251,8 @@ mct_application_startup (GApplication *application)
   /* Chain up. */
   G_APPLICATION_CLASS (mct_application_parent_class)->startup (application);
 
+  hdy_init ();
+
   g_action_map_add_action_entries (G_ACTION_MAP (application), app_entries,
                                    G_N_ELEMENTS (app_entries), application);
 

malcontent-control/main.ui

@@ -2,11 +2,15 @@
 <!-- Copyright © 2019, 2020 Endless Mobile, Inc. -->
 <interface>
   <requires lib="gtk+" version="3.12"/>
-  <object class="GtkApplicationWindow" id="main_window">
+  <object class="HdyApplicationWindow" id="main_window">
     <property name="default-width">540</property>
     <property name="default-height">580</property>
-    <child type="titlebar">
-      <object class="GtkHeaderBar" id="header">
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="HdyHeaderBar" id="header">
             <property name="show-close-button">True</property>
             <!-- Translators: This is the title of the main window -->
             <property name="title" translatable="yes">Parental Controls</property>
@@ -297,6 +301,8 @@ accounts. These can be created in the user settings.</property>
           </object>
         </child>
       </object>
+    </child>
+  </object>
 
   <menu id="primary-menu">
     <section>

malcontent-control/meson.build

@@ -28,6 +28,7 @@ malcontent_control = executable('malcontent-control',
     dependency('glib-2.0', version: '>= 2.54.2'),
     dependency('gobject-2.0', version: '>= 2.54'),
     dependency('gtk+-3.0'),
+    dependency('libhandy-1', version: '>=1.1.0'),
     dependency('polkit-gobject-1'),
     libmalcontent_dep,
     libmalcontent_ui_dep,