From 75f3005c67f5c8ea883c0e24e9832b59c5ced13f Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 12 Dec 2012 18:59:47 +0000
Subject: [PATCH] sometimes, you just have to do what a windows programmer
 would do. add a global signal, ARDOUR::GUIIdle() which can be used in the
 middle of long-running backend operations to give the GUI a chance to update.
 use it while adding routes.

git-svn-id: svn://localhost/ardour2/branches/3.0@13650 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/ardour_ui.cc    | 13 ++-----------
 libs/ardour/ardour/ardour.h |  1 +
 libs/ardour/globals.cc      |  1 +
 libs/ardour/session.cc      |  4 ++++
 4 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index c144c930b3..8d672e0f70 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -325,6 +325,8 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[])
 	_process_thread->init ();
 
 	DPIReset.connect (sigc::mem_fun (*this, &ARDOUR_UI::resize_text_widgets));
+
+	ARDOUR::GUIIdle.connect (forever_connections, MISSING_INVALIDATOR, boost::bind (&Gtkmm2ext::UI::flush_pending, this), gui_context());
 }
 
 int
@@ -3148,16 +3150,6 @@ ARDOUR_UI::add_route (Gtk::Window* float_window)
 		return;
 	}
 
-	if (count > 8) {
-		/* 8 is arbitrary - we just need a threshold for where
-		   we start caring that this operation might take
-		   a long time
-		*/
-		flush_pending();
-		flush_pending();
-		flush_pending();
-	}
-	
 	string template_path = add_route_dialog->track_template();
 
 	if (!template_path.empty()) {
@@ -3170,7 +3162,6 @@ ARDOUR_UI::add_route (Gtk::Window* float_window)
 	string name_template = add_route_dialog->name_template ();
 	PluginInfoPtr instrument = add_route_dialog->requested_instrument ();
 	RouteGroup* route_group = add_route_dialog->route_group ();
-
 	AutoConnectOption oac = Config->get_output_auto_connect();
 
 	if (oac & AutoConnectMaster) {
diff --git a/libs/ardour/ardour/ardour.h b/libs/ardour/ardour/ardour.h
index c19d4332e8..03de3965ec 100644
--- a/libs/ardour/ardour/ardour.h
+++ b/libs/ardour/ardour/ardour.h
@@ -48,6 +48,7 @@ namespace ARDOUR {
 	class AudioEngine;
 
 	extern PBD::Signal1<void,std::string> BootMessage;
+	extern PBD::Signal0<void> GUIIdle;
 
 	int init (bool with_vst, bool try_optimization);
 	void init_post_engine ();
diff --git a/libs/ardour/globals.cc b/libs/ardour/globals.cc
index 085dfc8e59..2b0bc05534 100644
--- a/libs/ardour/globals.cc
+++ b/libs/ardour/globals.cc
@@ -113,6 +113,7 @@ mix_buffers_with_gain_t ARDOUR::mix_buffers_with_gain = 0;
 mix_buffers_no_gain_t   ARDOUR::mix_buffers_no_gain = 0;
 
 PBD::Signal1<void,std::string> ARDOUR::BootMessage;
+PBD::Signal0<void> ARDOUR::GUIIdle;
 
 namespace ARDOUR {
 extern void setup_enum_writer ();
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index ccf4cb2b86..3b46ad3be1 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -2012,6 +2012,8 @@ Session::new_audio_route (int input_channels, int output_channels, RouteGroup* r
 			bus->add_internal_return ();
 
 			ret.push_back (bus);
+			
+			ARDOUR::GUIIdle ();
 		}
 
 
@@ -2242,6 +2244,8 @@ Session::add_routes_inner (RouteList& new_routes, bool input_auto_connect, bool
 				order++;
 			}
 		}
+
+		ARDOUR::GUIIdle ();
 	}
 
 	if (_monitor_out && IO::connecting_legal) {