#include "gtkmm2ext/gui_thread.h"
-#include "canvas/colors.h"
+#include "gtkmm2ext/colors.h"
#include "canvas/rectangle.h"
#include "canvas/text.h"
using namespace PBD;
using namespace Glib;
using namespace ArdourSurface;
+using namespace Gtkmm2ext;
using namespace ArdourCanvas;
static double unselected_root_alpha = 0.5;