From 35b218b527ecc60c16767690ca4a1d86481a8e3e Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 25 Nov 2008 22:15:19 +0000
Subject: make Gtkmm2ext::Popup::touch() thread-safe (again; it used to be in
 the 0.99 era)

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@4258 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/gtkmm2ext/popup.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libs/gtkmm2ext/popup.cc b/libs/gtkmm2ext/popup.cc
index 0b150eefe1..2d586d0317 100644
--- a/libs/gtkmm2ext/popup.cc
+++ b/libs/gtkmm2ext/popup.cc
@@ -22,6 +22,7 @@
 
 #include <gtkmm2ext/popup.h>
 #include <gtkmm2ext/utils.h>
+#include <gtkmm2ext/gtk_ui.h>
 
 using namespace std;
 using namespace Gtk;
@@ -83,9 +84,17 @@ PopUp::remove ()
 	}
 }
 
+#define ENSURE_GUI_THREAD(slot) \
+     if (!Gtkmm2ext::UI::instance()->caller_is_ui_thread()) {\
+	Gtkmm2ext::UI::instance()->call_slot ((slot));\
+        return;\
+     }
+
 void
 PopUp::touch ()
 {
+	ENSURE_GUI_THREAD (mem_fun (*this, &PopUp::touch));
+
 	if (is_visible ()) {
 		remove ();
 	} else {
-- 
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