+#if GTK_CHECK_VERSION (3, 3, 6)
+ GtkCssProvider *css_prov = gtk_css_provider_new ();
+ GtkStyleContext *gsty;
+
+ gtk_css_provider_load_from_data (css_prov,
+ "GtkEventBox {"
+ " background-color: transparent;"
+ "}",
+ -1, NULL);
+
+ gsty = gtk_widget_get_style_context (weventbox);
+ gtk_style_context_add_provider (gsty,
+ GTK_STYLE_PROVIDER (css_prov),
+ GTK_STYLE_PROVIDER_PRIORITY_USER);
+ g_object_unref (css_prov);
+#endif
+
+ gtk_box_set_homogeneous (GTK_BOX (vb), FALSE);