add API to suspend timers signal emission.

2 files changed, 14 insertions, 2 deletions

diff --git a/libs/pbd/pbd/timer.h b/libs/pbd/pbd/timer.h
index 4c80d9d088..4d96eedf7f 100644
--- a/libs/pbd/pbd/timer.h
+++ b/libs/pbd/pbd/timer.h
@@ -46,6 +46,9 @@ public:
 
 	virtual unsigned int connection_count () const = 0;
 
+	void suspend () { m_suspended = true; }
+	void resume  () { m_suspended = false; }
+
 protected:
 
 	virtual ~Timer() { }
@@ -56,6 +59,8 @@ protected:
 
 	virtual bool on_elapsed () = 0;
 
+	bool suspended  () const { return m_suspended; }
+
 private:
 
 	Timer(const Timer&);
@@ -73,6 +78,8 @@ private:
 
 	const Glib::RefPtr<Glib::MainContext>  m_main_context;
 
+	bool                                   m_suspended;
+
 };
 
 class LIBPBD_API StandardTimer : public Timer
diff --git a/libs/pbd/timer.cc b/libs/pbd/timer.cc
index 662c7ddc38..8312c53d14 100644
--- a/libs/pbd/timer.cc
+++ b/libs/pbd/timer.cc
@@ -26,6 +26,7 @@ Timer::Timer (unsigned int interval,
 	: m_timeout_source(NULL)
 	, m_timeout_interval(interval)
 	, m_main_context(main_context)
+	, m_suspended(false)
 {
 
 }
@@ -121,7 +122,9 @@ StandardTimer::on_elapsed()
 		return false;
 	}
 
-	m_signal();
+	if (!suspended ()) {
+		m_signal();
+	}
 	return true;
 }
 
@@ -149,7 +152,9 @@ BlinkTimer::on_elapsed()
 		return false;
 	}
 
-	m_blink_signal(blink_on = !blink_on);
+	if (!suspended ()) {
+		m_blink_signal(blink_on = !blink_on);
+	}
 	return true;
 }