[gtk/list-styles: 6/8] gtk-demo: Use style classes in the settings demo

[Matthias Clasen <matthiasc src gnome org>]

commit c5c30ab056aaf11e7517bb27dc826810fcddbde8
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 9 08:28:29 2020 -0400

    gtk-demo: Use style classes in the settings demo
    
    Use .navigation-sidebar on the left, and .data-table
    on the right.

 demos/gtk-demo/listview_settings.c  | 4 ++++
 demos/gtk-demo/listview_settings.ui | 6 ++++++
 2 files changed, 10 insertions(+)
---
diff --git a/demos/gtk-demo/listview_settings.c b/demos/gtk-demo/listview_settings.c
index 3bb674117b..9e5b3029d7 100644
--- a/demos/gtk-demo/listview_settings.c
+++ b/demos/gtk-demo/listview_settings.c
@@ -5,6 +5,10 @@
  * It demonstrates how to implement support for trees with GtkListView.
  * It also shows how to set up sorting and filtering for columns in a
  * GtkColumnView.
+ *
+ * It also demonstrates different styles of list. The tree on the left
+ * uses the ­.navigation-sidebar style class, the list on the right uses
+ * the ­.data-table style class.
  */
 
 #include <gtk/gtk.h>
diff --git a/demos/gtk-demo/listview_settings.ui b/demos/gtk-demo/listview_settings.ui
index f428d6b4dd..35c3c79c98 100644
--- a/demos/gtk-demo/listview_settings.ui
+++ b/demos/gtk-demo/listview_settings.ui
@@ -20,6 +20,9 @@
           <object class="GtkScrolledWindow">
             <child>
               <object class="GtkListView" id="listview">
+                <style>
+                  <class name="navigation-sidebar"/>
+                </style>
                 <property name="factory">
                   <object class="GtkBuilderListItemFactory">
                     <property name="bytes"><![CDATA[
@@ -73,6 +76,9 @@
                 <property name="vexpand">1</property>
                 <child>
                   <object class="GtkColumnView" id="columnview">
+                    <style>
+                      <class name="data-table"/>
+                    </style>
                     <child>
                       <object class="GtkColumnViewColumn" id="name_column">
                         <property name="title">Name</property>