window: move more code into ui file

Probably I can load the GMenuModel of the popover directly but I don't
know exactly how, and I've asked already and you can set bindings using
builder's ui file, just like before I don't know how at this time.

data/ui/window.ui

@@ -8,6 +8,7 @@
     <property name="default_width">800</property>
     <property name="default_height">600</property>
     <property name="show_menubar">False</property>
+    <signal name="key-press-event" handler="key_pressed" object="GcalWindow" swapped="no"/>
     <child>
       <object class="GtkOverlay" id="views_overlay">
         <property name="visible">True</property>
@@ -25,6 +26,7 @@
                 <property name="no_show_all">True</property>
                 <property name="hexpand">True</property>
                 <property name="show_close_button">True</property>
+		<signal name="notify::search-mode-enabled" handler="search_toggled" object="GcalWindow" swapped="no"/>
                 <child>
                   <object class="GtkGrid" id="search_entry_grid">
                     <property name="visible">True</property>
@@ -39,6 +41,7 @@
                         <property name="primary_icon_name">edit-find-symbolic</property>
                         <property name="primary_icon_activatable">False</property>
                         <property name="primary_icon_sensitive">False</property>
+			<signal name="search-changed" handler="search_changed" object="GcalWindow" swapped="no"/>
                       </object>
                       <packing>
                         <property name="left_attach">0</property>
@@ -61,6 +64,8 @@
                 <property name="vexpand">True</property>
                 <property name="transition_duration">250</property>
                 <property name="transition_type">slide-left-right</property>
+		<signal name="notify::visible-child" handler="view_changed" object="GcalWindow" swapped="no"/>
+		<signal name="notify::transition-running" handler="stack_transition_running" object="GcalWindow" swapped="no"/>
                 <style>
                   <class name="views"/>
                 </style>
@@ -96,6 +101,7 @@
             <property name="visible">True</property>
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
+	    <signal name="clicked" handler="date_updated" object="GcalWindow" swapped="no"/>
           </object>
         </child>
         <child type="title">
@@ -110,10 +116,12 @@
             <property name="visible">True</property>
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
+            <property name="use_popover">True</property>
             <child>
               <object class="GtkImage" id="menu_image">
                 <property name="can_focus">False</property>
                 <property name="icon_name">open-menu-symbolic</property>
+		<property name="icon_size">1</property>
               </object>
             </child>
           </object>
@@ -144,4 +152,13 @@
       <class name="views"/>
     </style>
   </template>
+  <object class="GtkPopover" id="popover">
+    <property name="visible">False</property>
+    <property name="relative_to">views_stack</property>
+    <child>
+      <object class="GcalNewEventWidget" id="new_event_widget">
+        <property name="visible">True</property>
+      </object>
+    </child>
+  </object>
 </interface>

src/gcal-window.c

@@ -980,6 +980,15 @@ gcal_window_class_init(GcalWindowClass *klass)
   gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, views_overlay);
   gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, views_stack);
   gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, views_switcher);
+  gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, popover);
+  gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, new_event_widget);
+
+  gtk_widget_class_bind_template_callback (widget_class, key_pressed);
+  gtk_widget_class_bind_template_callback (widget_class, search_toggled);
+  gtk_widget_class_bind_template_callback (widget_class, search_changed);
+  gtk_widget_class_bind_template_callback (widget_class, view_changed);
+  gtk_widget_class_bind_template_callback (widget_class, stack_transition_running);
+  gtk_widget_class_bind_template_callback (widget_class, date_updated);  
 }
 
 static void
@@ -1029,8 +1038,6 @@ gcal_window_constructed (GObject *object)
 
 
   /* header_bar: menu */
-  gtk_menu_button_set_use_popover (GTK_MENU_BUTTON (priv->menu_button),
-                                   TRUE);
   builder = gtk_builder_new ();
   gtk_builder_add_from_resource (builder,
                                  "/org/gnome/calendar/menus.ui",
@@ -1049,7 +1056,6 @@ gcal_window_constructed (GObject *object)
                           priv->search_bar, "search-mode-enabled",
                           G_BINDING_BIDIRECTIONAL);
 
-
   priv->views[GCAL_WINDOW_VIEW_WEEK] =
     gcal_week_view_new (priv->manager);
   gcal_week_view_set_first_weekday (
@@ -1086,18 +1092,7 @@ gcal_window_constructed (GObject *object)
                           "active-date",
                           G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE);
 
-  /* popover and content */
-  priv->popover = gtk_popover_new (GTK_WIDGET(priv->views_stack));
-
-  priv->new_event_widget = gcal_new_event_widget_new ();
-
-  gtk_container_add (GTK_CONTAINER(priv->popover),
-                     GTK_WIDGET(priv->new_event_widget));
-
   /* signals connection/handling */
-  g_signal_connect (object, "key-press-event",
-                    G_CALLBACK (key_pressed), object);
-
   /* HACK to ensure proper destroy of search-view widget */
   g_signal_connect_swapped (priv->views_stack, "destroy",
                             G_CALLBACK (gtk_widget_destroy),
@@ -1120,19 +1115,6 @@ gcal_window_constructed (GObject *object)
         }
     }
 
-  g_signal_connect (priv->search_bar, "notify::search-mode-enabled",
-                    G_CALLBACK (search_toggled), object);
-  g_signal_connect (priv->search_entry, "search-changed",
-                    G_CALLBACK (search_changed), object);
-
-  g_signal_connect (priv->views_stack, "notify::visible-child",
-                    G_CALLBACK (view_changed), object);
-  g_signal_connect (priv->views_stack, "notify::transition-running",
-                    G_CALLBACK (stack_transition_running), object);
-
-  g_signal_connect (priv->today_button, "clicked",
-                    G_CALLBACK (date_updated), object);
-
   g_signal_connect (gcal_nav_bar_get_prev_button (GCAL_NAV_BAR (priv->nav_bar)),
                     "clicked", G_CALLBACK (date_updated), object);
   g_signal_connect (gcal_nav_bar_get_next_button (GCAL_NAV_BAR (priv->nav_bar)),