X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fui_signaller.h;h=9d4495cd18921822b2fcfa02836a3c916f2cfedd;hb=05c37bfdb86be26497d5baa448a0cbda20e33bed;hp=ee4d230d407e566114ae57b491700196c19d21c5;hpb=6788ff5967508056d1321c16143bf72fa7cd4516;p=dcpomatic.git

diff --git a/src/lib/ui_signaller.h b/src/lib/ui_signaller.h
index ee4d230d4..9d4495cd1 100644
--- a/src/lib/ui_signaller.h
+++ b/src/lib/ui_signaller.h
@@ -24,6 +24,8 @@
 #include <boost/asio.hpp>
 #include <boost/thread.hpp>
 
+class Signaller;
+
 /** A class to allow signals to be emitted from non-UI threads and handled
  *  by a UI thread.
  */
@@ -37,23 +39,6 @@ public:
 		_ui_thread = boost::this_thread::get_id ();
 	}
 
-	/** Emit a signal from any thread whose handlers will be called in the UI
-	 *  thread.  Use something like:
-	 *
-	 *  ui_signaller->emit (boost::bind (boost::ref (SomeSignal), parameter));
-	 */
-	template <typename T>
-	void emit (T f) {
-		if (boost::this_thread::get_id() == _ui_thread) {
-			/* already in the UI thread */
-			f ();
-		} else {
-			/* non-UI thread; post to the service and wake up the UI */
-			_service.post (f);
-			wake_ui ();
-		}
-	}
-
 	/* Do something next time the UI is idle */
 	template <typename T>
 	void when_idle (T f) {
@@ -73,6 +58,25 @@ public:
 	}
 
 private:
+	/** Emit a signal from any thread whose handlers will be called in the UI
+	 *  thread.  Use something like:
+	 *
+	 *  ui_signaller->emit (boost::bind (boost::ref (SomeSignal), parameter));
+	 */
+	template <typename T>
+	void emit (T f) {
+		if (boost::this_thread::get_id() == _ui_thread) {
+			/* already in the UI thread */
+			f ();
+		} else {
+			/* non-UI thread; post to the service and wake up the UI */
+			_service.post (f);
+			wake_ui ();
+		}
+	}
+
+	friend class Signaller;
+	
 	/** A io_service which is used as the conduit for messages */
 	boost::asio::io_service _service;
 	/** Object required to keep io_service from stopping when it has nothing to do */