[regexxer] Apply GNOME 3 toolbar style

[Fabien Parent <fparent src gnome org>]

commit 7c05050b4218378db7d4fbce9dad6adc044bbe78
Author: Fabien Parent <parent f gmail com>
Date:   Sun Jul 31 21:23:04 2011 +0200

    Apply GNOME 3 toolbar style

 src/mainwindow.cc |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index 0277761..e2ab60b 100644
--- a/src/mainwindow.cc
+++ b/src/mainwindow.cc
@@ -299,6 +299,13 @@ void MainWindow::initialize(const InitState& init)
   if (init.feedback)
     filetree_->signal_feedback.connect(&print_location);
 
+  Glib::RefPtr<Gtk::StyleContext> style_context =
+      toolbar_->get_style_context ();
+  if (style_context)
+  {
+    style_context->add_class (GTK_STYLE_CLASS_PRIMARY_TOOLBAR);
+  }
+
   // Strangely, folder_exists seems to be always true, probably because the
   // file chooser works asynchronously but the GLib main loop isn't running
   // yet.  As a work-around, explicitely check whether the directory exists