[swell-foop] Conditionally display the New button in headerbar

[Michael Catanzaro <mcatanzaro src gnome org>]

commit a5c8f78c79e7014ae64d23c48173a3583792694f
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Dec 8 11:17:19 2013 -0600

    Conditionally display the New button in headerbar
    
    If the app menu is displayed in the window, then this button is
    redundant.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720034

 src/swell-foop.vala |   17 ++++++++++-------
 1 files changed, 10 insertions(+), 7 deletions(-)
---
diff --git a/src/swell-foop.vala b/src/swell-foop.vala
index 0310558..c91e53c 100644
--- a/src/swell-foop.vala
+++ b/src/swell-foop.vala
@@ -97,13 +97,16 @@ public class SwellFoop : Gtk.Application
         headerbar.show_fallback_app_menu = true;
         window.set_titlebar (headerbar);
 
-        var new_game_button = new Gtk.Button ();
-        new_game_button.label = _("_New");
-        new_game_button.get_style_context ().add_class ("text-button");
-        new_game_button.use_underline = true;
-        new_game_button.action_name = "app.new-game";
-        new_game_button.show ();
-        headerbar.add (new_game_button);
+        if (Gtk.Settings.get_default ().gtk_shell_shows_app_menu)
+        {
+            var new_game_button = new Gtk.Button ();
+            new_game_button.label = _("_New");
+            new_game_button.get_style_context ().add_class ("text-button");
+            new_game_button.use_underline = true;
+            new_game_button.action_name = "app.new-game";
+            new_game_button.show ();
+            headerbar.add (new_game_button);
+        }
 
         /* show the current score */
         update_score_cb (0);