[gnome-games] ui: Don't show gamepad list if it's empty

[Adrien Plazas <aplazas src gnome org>]

commit a518e5135311035d3489b55f9b19fbe498653f9f
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Sun Jul 22 02:11:25 2018 +0500

    ui: Don't show gamepad list if it's empty

 data/ui/preferences-page-controllers.ui  | 2 +-
 src/ui/preferences-page-controllers.vala | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/data/ui/preferences-page-controllers.ui b/data/ui/preferences-page-controllers.ui
index 2e992ea8..01295b57 100644
--- a/data/ui/preferences-page-controllers.ui
+++ b/data/ui/preferences-page-controllers.ui
@@ -28,7 +28,7 @@
                 <property name="can_focus">False</property>
                 <property name="orientation">vertical</property>
                 <child>
-                  <object class="GtkFrame">
+                  <object class="GtkFrame" id="gamepads_frame">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
                     <property name="border_width">12</property>
diff --git a/src/ui/preferences-page-controllers.vala b/src/ui/preferences-page-controllers.vala
index a943571b..e62acc49 100644
--- a/src/ui/preferences-page-controllers.vala
+++ b/src/ui/preferences-page-controllers.vala
@@ -5,6 +5,8 @@ private class Games.PreferencesPageControllers: Gtk.Stack, PreferencesPage {
        public Gtk.HeaderBar header_bar { protected set; get; }
        public bool immersive_mode { protected set; get; }
 
+       [GtkChild]
+       private Gtk.Frame gamepads_frame;
        [GtkChild]
        private Gtk.ListBox gamepads_list_box;
        [GtkChild]
@@ -52,6 +54,7 @@ private class Games.PreferencesPageControllers: Gtk.Stack, PreferencesPage {
                        box.show_all ();
                        gamepads_list_box.add (box);
                };
+               gamepads_frame.visible = i > 0;
        }
 
        private void clear_gamepad_list () {