Working port notification for LV2 GUIs (ll-plugins VU meter works in Ingen now).

git-svn-id: http://svn.drobilla.net/lad/ingen@790 a436a847-0d15-0410-975c-d299462d15a1

17 files changed, 158 insertions, 175 deletions

diff --git a/src/libs/client/OSCEngineSender.cpp b/src/libs/client/OSCEngineSender.cpp
index 1618f2a1..e3183f78 100644
--- a/src/libs/client/OSCEngineSender.cpp
+++ b/src/libs/client/OSCEngineSender.cpp
@@ -450,6 +450,24 @@ OSCEngineSender::set_port_value_immediate(const string& port_path,
 	}
 }
 
+	
+void
+OSCEngineSender::enable_port_broadcasting(const string& port_path)
+{
+	lo_send(_engine_addr, "/ingen/enable_port_broadcasting", "is",
+			next_id(),
+			port_path.c_str());
+}
+
+
+void
+OSCEngineSender::disable_port_broadcasting(const string& port_path)
+{
+	lo_send(_engine_addr, "/ingen/disable_port_broadcasting", "is",
+			next_id(),
+			port_path.c_str());
+}
+
 
 void
 OSCEngineSender::set_program(const string& node_path,
diff --git a/src/libs/client/OSCEngineSender.hpp b/src/libs/client/OSCEngineSender.hpp
index c91dfbbd..c97c4e94 100644
--- a/src/libs/client/OSCEngineSender.hpp
+++ b/src/libs/client/OSCEngineSender.hpp
@@ -132,6 +132,10 @@ public:
 	                              uint32_t      voice,
 	                              uint32_t      data_size,
 	                              const void*   data);
+	
+	void enable_port_broadcasting(const string& port_path);
+	
+	void disable_port_broadcasting(const string& port_path);
 
 	void set_program(const string& node_path,
 	                 uint32_t      bank,
diff --git a/src/libs/engine/Makefile.am b/src/libs/engine/Makefile.am
index 5607f3db..9aa8be9a 100644
--- a/src/libs/engine/Makefile.am
+++ b/src/libs/engine/Makefile.am
@@ -106,6 +106,8 @@ libingen_engine_la_SOURCES = \
 	events.hpp \
 	events/AddNodeEvent.cpp \
 	events/AddNodeEvent.hpp \
+	events/AddPortEvent.cpp \
+	events/AddPortEvent.hpp \
 	events/AllNotesOffEvent.cpp \
 	events/AllNotesOffEvent.hpp \
 	events/ClearPatchEvent.cpp \
@@ -118,8 +120,6 @@ libingen_engine_la_SOURCES = \
 	events/DeactivateEvent.hpp \
 	events/DestroyEvent.cpp \
 	events/DestroyEvent.hpp \
-	events/DisablePatchEvent.cpp \
-	events/DisablePatchEvent.hpp \
 	events/DisconnectNodeEvent.cpp \
 	events/DisconnectNodeEvent.hpp \
 	events/DisconnectPortEvent.cpp \
@@ -128,8 +128,8 @@ libingen_engine_la_SOURCES = \
 	events/DisconnectionEvent.hpp \
 	events/EnablePatchEvent.cpp \
 	events/EnablePatchEvent.hpp \
-	events/EnablePortMonitoringEvent.cpp \
-	events/EnablePortMonitoringEvent.hpp \
+	events/EnablePortBroadcastingEvent.cpp \
+	events/EnablePortBroadcastingEvent.hpp \
 	events/LoadPluginsEvent.cpp \
 	events/LoadPluginsEvent.hpp \
 	events/MidiLearnEvent.cpp \
diff --git a/src/libs/engine/OSCEngineReceiver.cpp b/src/libs/engine/OSCEngineReceiver.cpp
index d2d7a4a0..3fb9e189 100644
--- a/src/libs/engine/OSCEngineReceiver.cpp
+++ b/src/libs/engine/OSCEngineReceiver.cpp
@@ -63,7 +63,7 @@ OSCEngineReceiver::OSCEngineReceiver(Engine& engine, size_t queue_size, uint16_t
 	}
 
 	// For debugging, print all incoming OSC messages
-	lo_server_add_method(_server, NULL, NULL, generic_cb, NULL);
+	//lo_server_add_method(_server, NULL, NULL, generic_cb, NULL);
 
 	// Set response address for this message.
 	// It's important this is first and returns nonzero.
@@ -98,6 +98,8 @@ OSCEngineReceiver::OSCEngineReceiver(Engine& engine, size_t queue_size, uint16_t
 	lo_server_add_method(_server, "/ingen/disconnect_all", "is", disconnect_all_cb, this);
 	lo_server_add_method(_server, "/ingen/set_port_value", NULL, set_port_value_cb, this);
 	lo_server_add_method(_server, "/ingen/set_port_value_immediate", NULL, set_port_value_immediate_cb, this);
+	lo_server_add_method(_server, "/ingen/enable_port_broadcasting", NULL, enable_port_broadcasting_cb, this);
+	lo_server_add_method(_server, "/ingen/disable_port_broadcasting", NULL, disable_port_broadcasting_cb, this);
 	lo_server_add_method(_server, "/ingen/note_on", "isii", note_on_cb, this);
 	lo_server_add_method(_server, "/ingen/note_off", "isi", note_off_cb, this);
 	lo_server_add_method(_server, "/ingen/all_notes_off", "isi", all_notes_off_cb, this);
@@ -629,13 +631,13 @@ OSCEngineReceiver::_set_port_value_immediate_cb(const char* path, const char* ty
 	if (argc == 3) {
 		if (types[2] == 'f') {
 			const float value = argv[2]->f;
-			set_port_value_immediate(port_path, "who cares", sizeof(float), &value);
+			set_port_value_immediate(port_path, "", sizeof(float), &value);
 			return 0;
 		} else if (types[2] == 'b') {
 			lo_blob b = argv[2];
 			size_t data_size = lo_blob_datasize(b);
 			void* data = lo_blob_dataptr(b);
-			set_port_value_immediate(port_path, "who cares", data_size, data);
+			set_port_value_immediate(port_path, "", data_size, data);
 			return 0;
 		} else {
 			return 1;
@@ -643,13 +645,13 @@ OSCEngineReceiver::_set_port_value_immediate_cb(const char* path, const char* ty
 	} else {
 		if (types[3] == 'f') {
 			const float value = argv[3]->f;
-			set_port_value_immediate(port_path, "who cares", argv[2]->i, sizeof(float), &value);
+			set_port_value_immediate(port_path, "", argv[2]->i, sizeof(float), &value);
 			return 0;
 		} else if (types[3] == 'b') {
 			lo_blob b = argv[3];
 			size_t data_size = lo_blob_datasize(b);
 			void* data = lo_blob_dataptr(b);
-			set_port_value_immediate(port_path, "who cares", argv[2]->i, data_size, data);
+			set_port_value_immediate(port_path, "", argv[2]->i, data_size, data);
 			return 0;
 		} else {
 			return 1;
@@ -731,6 +733,34 @@ OSCEngineReceiver::_set_port_value_cb(const char* path, const char* types, lo_ar
 
 
 /** \page engine_osc_namespace
+ * <p> \b /ingen/enable_port_broadcasting - Enable broadcasting of changing port values
+ * \arg \b response-id (integer)
+ * \arg \b port-path (string) - Name of port </p> \n \n
+ */
+int
+OSCEngineReceiver::_enable_port_broadcasting_cb(const char* path, const char* types, lo_arg** argv, int argc, lo_message msg)
+{
+	const char* port_path = &argv[1]->s;
+	enable_port_broadcasting(port_path);
+	return 0;
+}
+
+
+/** \page engine_osc_namespace
+ * <p> \b /ingen/disable_port_broadcasting - Enable broadcasting of changing port values
+ * \arg \b response-id (integer)
+ * \arg \b port-path (string) - Name of port </p> \n \n
+ */
+int
+OSCEngineReceiver::_disable_port_broadcasting_cb(const char* path, const char* types, lo_arg** argv, int argc, lo_message msg)
+{
+	const char* port_path = &argv[1]->s;
+	disable_port_broadcasting(port_path);
+	return 0;
+}
+
+
+/** \page engine_osc_namespace
  * <p> \b /ingen/note_on - Triggers a note-on, just as if it came from MIDI
  * \arg \b response-id (integer)
  * \arg \b node-path (string) - Patch of Node to trigger (must be a trigger or note node)
diff --git a/src/libs/engine/OSCEngineReceiver.hpp b/src/libs/engine/OSCEngineReceiver.hpp
index 75cbda7c..d46bc7c3 100644
--- a/src/libs/engine/OSCEngineReceiver.hpp
+++ b/src/libs/engine/OSCEngineReceiver.hpp
@@ -100,6 +100,8 @@ private:
 	LO_HANDLER(disconnect_all);
 	LO_HANDLER(set_port_value);
 	LO_HANDLER(set_port_value_immediate);
+	LO_HANDLER(enable_port_broadcasting);
+	LO_HANDLER(disable_port_broadcasting);
 	LO_HANDLER(note_on);
 	LO_HANDLER(note_off);
 	LO_HANDLER(all_notes_off);
diff --git a/src/libs/engine/QueuedEngineInterface.cpp b/src/libs/engine/QueuedEngineInterface.cpp
index 72be00aa..4e138c57 100644
--- a/src/libs/engine/QueuedEngineInterface.cpp
+++ b/src/libs/engine/QueuedEngineInterface.cpp
@@ -196,14 +196,14 @@ QueuedEngineInterface::set_polyphonic(const string& path, bool poly)
 void
 QueuedEngineInterface::enable_patch(const string& patch_path)
 {
-	push_queued(new EnablePatchEvent(_engine, _responder, now(), patch_path));
+	push_queued(new EnablePatchEvent(_engine, _responder, now(), patch_path, true));
 }
 
 
 void
 QueuedEngineInterface::disable_patch(const string& patch_path)
 {
-	push_queued(new DisablePatchEvent(_engine, _responder, now(), patch_path));
+	push_queued(new EnablePatchEvent(_engine, _responder, now(), patch_path, false));
 }
 
 
@@ -274,6 +274,20 @@ QueuedEngineInterface::set_port_value_immediate(const string& port_path,
 
 
 void
+QueuedEngineInterface::enable_port_broadcasting(const string& port_path)
+{
+	push_queued(new EnablePortBroadcastingEvent(_engine, _responder, now(), port_path, true));
+}
+
+
+void
+QueuedEngineInterface::disable_port_broadcasting(const string& port_path)
+{
+	push_queued(new EnablePortBroadcastingEvent(_engine, _responder, now(), port_path, false));
+}
+
+
+void
 QueuedEngineInterface::set_program(const string& node_path,
                                    uint32_t      bank,
                                    uint32_t      program)
diff --git a/src/libs/engine/QueuedEngineInterface.hpp b/src/libs/engine/QueuedEngineInterface.hpp
index 3a0ad016..c860c0f8 100644
--- a/src/libs/engine/QueuedEngineInterface.hpp
+++ b/src/libs/engine/QueuedEngineInterface.hpp
@@ -139,6 +139,10 @@ public:
 	                                      uint32_t      voice,
 	                                      uint32_t      data_size,
 	                                      const void*   data);
+	
+	virtual void enable_port_broadcasting(const string& port_path);
+	
+	virtual void disable_port_broadcasting(const string& port_path);
 
 	virtual void set_program(const string& node_path,
 	                         uint32_t      bank,
diff --git a/src/libs/engine/events.hpp b/src/libs/engine/events.hpp
index 2660c6c1..82c948b2 100644
--- a/src/libs/engine/events.hpp
+++ b/src/libs/engine/events.hpp
@@ -28,10 +28,10 @@
 #include "CreatePatchEvent.hpp"
 #include "DeactivateEvent.hpp"
 #include "DestroyEvent.hpp"
-#include "DisablePatchEvent.hpp"
-#include "DisconnectionEvent.hpp"
 #include "DisconnectNodeEvent.hpp"
+#include "DisconnectionEvent.hpp"
 #include "EnablePatchEvent.hpp"
+#include "EnablePortBroadcastingEvent.hpp"
 #include "LoadPluginsEvent.hpp"
 #include "MidiLearnEvent.hpp"
 #include "NoteOffEvent.hpp"
@@ -46,17 +46,17 @@
 #include "RequestPluginsEvent.hpp"
 #include "RequestPortValueEvent.hpp"
 #include "SetMetadataEvent.hpp"
-#include "SetPolyphonyEvent.hpp"
 #include "SetPolyphonicEvent.hpp"
+#include "SetPolyphonyEvent.hpp"
 #include "SetPortValueEvent.hpp"
 #include "SetPortValueQueuedEvent.hpp"
 #include "UnregisterClientEvent.hpp"
 
 #ifdef HAVE_DSSI
-#include "DSSIUpdateEvent.hpp"
-#include "DSSIControlEvent.hpp"
 #include "DSSIConfigureEvent.hpp"
+#include "DSSIControlEvent.hpp"
 #include "DSSIProgramEvent.hpp"
+#include "DSSIUpdateEvent.hpp"
 #endif
 
 #endif // EVENTS_H
diff --git a/src/libs/engine/events/DisablePatchEvent.cpp b/src/libs/engine/events/DisablePatchEvent.cpp
deleted file mode 100644
index bc5219a6..00000000
--- a/src/libs/engine/events/DisablePatchEvent.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-/* This file is part of Ingen.
- * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
- * 
- * Ingen is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any later
- * version.
- * 
- * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
- * 
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "DisablePatchEvent.hpp"
-#include "Responder.hpp"
-#include "Engine.hpp"
-#include "Patch.hpp"
-#include "ClientBroadcaster.hpp"
-#include "util.hpp"
-#include "ObjectStore.hpp"
-#include "Port.hpp"
-
-namespace Ingen {
-
-
-DisablePatchEvent::DisablePatchEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& patch_path)
-: QueuedEvent(engine, responder, timestamp),
-  _patch_path(patch_path),
-  _patch(NULL)
-{
-}
-
-
-void
-DisablePatchEvent::pre_process()
-{
-	_patch = _engine.object_store()->find_patch(_patch_path);
-	
-	QueuedEvent::pre_process();
-}
-
-
-void
-DisablePatchEvent::execute(ProcessContext& context)
-{
-	QueuedEvent::execute(context);
-	
-	if (_patch != NULL)
-		_patch->disable();
-}
-
-
-void
-DisablePatchEvent::post_process()
-{	
-	if (_patch != NULL) {
-		_responder->respond_ok();
-		_engine.broadcaster()->send_patch_disable(_patch_path);
-	} else {
-		_responder->respond_error(string("Patch ") + _patch_path + " not found");
-	}
-}
-
-
-} // namespace Ingen
-
diff --git a/src/libs/engine/events/DisablePatchEvent.hpp b/src/libs/engine/events/DisablePatchEvent.hpp
deleted file mode 100644
index 1a208246..00000000
--- a/src/libs/engine/events/DisablePatchEvent.hpp
+++ /dev/null
@@ -1,53 +0,0 @@
-/* This file is part of Ingen.
- * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
- * 
- * Ingen is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any later
- * version.
- * 
- * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
- * 
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef DISABLEPATCHEVENT_H
-#define DISABLEPATCHEVENT_H
-
-#include <string>
-#include "QueuedEvent.hpp"
-
-using std::string;
-
-namespace Ingen {
-
-class Patch;
-
-
-/** Disables a Patch's DSP processing.
- *
- * \ingroup engine
- */
-class DisablePatchEvent : public QueuedEvent
-{
-public:
-	DisablePatchEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& patch_path);
-	
-	void pre_process();
-	void execute(ProcessContext& context);
-	void post_process();
-
-private:
-	string _patch_path;
-	Patch* _patch;
-};
-
-
-} // namespace Ingen
-
-
-#endif // DISABLEPATCHEVENT_H
diff --git a/src/libs/engine/events/EnablePatchEvent.cpp b/src/libs/engine/events/EnablePatchEvent.cpp
index d0d872bb..e380340f 100644
--- a/src/libs/engine/events/EnablePatchEvent.cpp
+++ b/src/libs/engine/events/EnablePatchEvent.cpp
@@ -26,11 +26,12 @@
 namespace Ingen {
 
 
-EnablePatchEvent::EnablePatchEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& patch_path)
+EnablePatchEvent::EnablePatchEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& patch_path, bool enable)
 : QueuedEvent(engine, responder, timestamp),
   _patch_path(patch_path),
   _patch(NULL),
-  _compiled_patch(NULL)
+  _compiled_patch(NULL),
+  _enable(enable)
 {
 }
 
@@ -40,10 +41,10 @@ EnablePatchEvent::pre_process()
 {
 	_patch = _engine.object_store()->find_patch(_patch_path);
 	
-	if (_patch != NULL) {
+	if (_enable && _patch) {
 		/* Any event that requires a new process order will set the patch's
-		 * process order to NULL if it is executed when the patch is not
-		 * active.  So, if the PO is NULL, calculate it here */
+		 * compiled_patch to NULL if it is executed when the patch is not
+		 * active.  So, if the CP is NULL, calculate it here */
 		if (_patch->compiled_patch() == NULL)
 			_compiled_patch = _patch->compile();
 	}
@@ -58,9 +59,12 @@ EnablePatchEvent::execute(ProcessContext& context)
 	QueuedEvent::execute(context);
 
 	if (_patch != NULL) {
-		_patch->enable();
+		if (_enable)
+			_patch->enable();
+		else
+			_patch->disable();
 
-		if (_patch->compiled_patch() == NULL)
+		if (_enable && _patch->compiled_patch() == NULL)
 			_patch->compiled_patch(_compiled_patch);
 	}
 }
@@ -71,7 +75,10 @@ EnablePatchEvent::post_process()
 {
 	if (_patch != NULL) {
 		_responder->respond_ok();
-		_engine.broadcaster()->send_patch_enable(_patch_path);
+		if (_enable)
+			_engine.broadcaster()->send_patch_enable(_patch_path);
+		else
+			_engine.broadcaster()->send_patch_disable(_patch_path);
 	} else {
 		_responder->respond_error(string("Patch ") + _patch_path + " not found");
 	}
diff --git a/src/libs/engine/events/EnablePatchEvent.hpp b/src/libs/engine/events/EnablePatchEvent.hpp
index f0ba5714..a5d7d7e7 100644
--- a/src/libs/engine/events/EnablePatchEvent.hpp
+++ b/src/libs/engine/events/EnablePatchEvent.hpp
@@ -39,7 +39,11 @@ class CompiledPatch;
 class EnablePatchEvent : public QueuedEvent
 {
 public:
-	EnablePatchEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& patch_path);
+	EnablePatchEvent(Engine&              engine,
+	                 SharedPtr<Responder> responder,
+	                 SampleCount          timestamp,
+	                 const string&        patch_path,
+	                 bool                 enable);
 	
 	void pre_process();
 	void execute(ProcessContext& context);
@@ -49,6 +53,7 @@ private:
 	string         _patch_path;
 	Patch*         _patch;
 	CompiledPatch* _compiled_patch; // Patch's new process order
+	bool           _enable;
 };
 
 
diff --git a/src/libs/engine/events/EnablePortBroadcastingEvent.cpp b/src/libs/engine/events/EnablePortBroadcastingEvent.cpp
index e432a884..27603e86 100644
--- a/src/libs/engine/events/EnablePortBroadcastingEvent.cpp
+++ b/src/libs/engine/events/EnablePortBroadcastingEvent.cpp
@@ -33,10 +33,12 @@ namespace Ingen {
 EnablePortBroadcastingEvent::EnablePortBroadcastingEvent(Engine&              engine,
                                                          SharedPtr<Responder> responder,
                                                          SampleCount          timestamp,
-                                                         const std::string&   port_path)
+                                                         const std::string&   port_path,
+                                                         bool                 enable)
 : QueuedEvent(engine, responder, timestamp),
   _port_path(port_path),
-  _port(NULL)
+  _port(NULL),
+  _enable(enable)
 {
 }
 
@@ -55,31 +57,18 @@ EnablePortBroadcastingEvent::execute(ProcessContext& context)
 {
 	QueuedEvent::execute(context);
 
-#if 0
-	assert(_time >= start && _time <= end);
-
-	if (_port != NULL && _port->type() == DataType::FLOAT)
-		_value = ((AudioBuffer*)_port->buffer(0))->value_at(0/*_time - start*/);
-	else 
-		_port = NULL; // triggers error response
-#endif
+	if (_port)
+		_port->monitor(_enable);
 }
 
 
 void
 EnablePortBroadcastingEvent::post_process()
 {
-#if 0
-	string msg;
-	if (!_port) {
-		_responder->respond_error("Unable to find port for get_value responder.");
-	} else if (_responder->client()) {
+	if (_port)
 		_responder->respond_ok();
-		_responder->client()->control_change(_port_path, _value);
-	} else {
-		_responder->respond_error("Unable to find client to send port value");
-	}
-#endif
+	else
+		_responder->respond_error("Unable to find port for get_value responder.");
 }
 
 
diff --git a/src/libs/engine/events/EnablePortBroadcastingEvent.hpp b/src/libs/engine/events/EnablePortBroadcastingEvent.hpp
index 55f7decb..e24389cb 100644
--- a/src/libs/engine/events/EnablePortBroadcastingEvent.hpp
+++ b/src/libs/engine/events/EnablePortBroadcastingEvent.hpp
@@ -41,7 +41,8 @@ public:
 	EnablePortBroadcastingEvent(Engine&              engine,
 	                            SharedPtr<Responder> responder,
 	                            SampleCount          timestamp,
-	                            const std::string&   port_path);
+	                            const std::string&   port_path,
+								bool                 enable);
 
 	void pre_process();
 	void execute(ProcessContext& context);
@@ -50,6 +51,7 @@ public:
 private:
 	const std::string _port_path;
 	Port*             _port;
+	bool              _enable;
 };
 
 
diff --git a/src/libs/engine/events/Makefile.am b/src/libs/engine/events/Makefile.am
index e634b63b..7d51ce90 100644
--- a/src/libs/engine/events/Makefile.am
+++ b/src/libs/engine/events/Makefile.am
@@ -3,6 +3,8 @@ MAINTAINERCLEANFILES = Makefile.in
 EXTRA_DIST = \
 	AddNodeEvent.cpp \
 	AddNodeEvent.hpp \
+	AddPortEvent.cpp \
+	AddPortEvent.hpp \
 	AllNotesOffEvent.cpp \
 	AllNotesOffEvent.hpp \
 	ClearPatchEvent.cpp \
@@ -23,8 +25,6 @@ EXTRA_DIST = \
 	DeactivateEvent.hpp \
 	DestroyEvent.cpp \
 	DestroyEvent.hpp \
-	DisablePatchEvent.cpp \
-	DisablePatchEvent.hpp \
 	DisconnectNodeEvent.cpp \
 	DisconnectNodeEvent.hpp \
 	DisconnectPortEvent.cpp \
diff --git a/src/libs/gui/NodeModule.cpp b/src/libs/gui/NodeModule.cpp
index 722cc08a..39df7151 100644
--- a/src/libs/gui/NodeModule.cpp
+++ b/src/libs/gui/NodeModule.cpp
@@ -38,6 +38,7 @@ namespace GUI {
 NodeModule::NodeModule(boost::shared_ptr<PatchCanvas> canvas, SharedPtr<NodeModel> node)
 	: FlowCanvas::Module(canvas, node->path().name())
 	, _node(node)
+	, _slv2_ui(NULL)
 	, _gui(NULL)
 	, _gui_item(NULL)
 {
@@ -90,14 +91,30 @@ NodeModule::create(boost::shared_ptr<PatchCanvas> canvas, SharedPtr<NodeModel> n
 	for (MetadataMap::const_iterator m = node->metadata().begin(); m != node->metadata().end(); ++m)
 		ret->set_metadata(m->first, m->second);
 
-	for (PortModelList::const_iterator p = node->ports().begin(); p != node->ports().end(); ++p)
+	uint32_t index = 0;
+	for (PortModelList::const_iterator p = node->ports().begin(); p != node->ports().end(); ++p) {
 		ret->add_port(*p, false);
+		(*p)->signal_control.connect(sigc::bind<0>(
+					sigc::mem_fun(ret.get(), &NodeModule::control_change), index));
+		++index;
+	}
 
 	ret->resize();
 
 	return ret;
 }
 
+	
+void
+NodeModule::control_change(uint32_t index, float control)
+{
+	if (_slv2_ui) {
+		const LV2UI_Descriptor* ui_descriptor = slv2_ui_instance_get_descriptor(_slv2_ui);
+		LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_slv2_ui);
+		ui_descriptor->port_event(ui_handle, index, 4, &control);
+	}
+}
+
 
 void
 NodeModule::embed_gui(bool embed)
@@ -112,10 +129,10 @@ NodeModule::embed_gui(bool embed)
 		if (!_gui_item) {
 			cerr << "Embedding LV2 GUI" << endl;
 
-			SLV2UIInstance ui = _node->plugin()->ui(App::instance().engine().get(), _node.get());
-			if (ui) {
+			_slv2_ui = _node->plugin()->ui(App::instance().engine().get(), _node.get());
+			if (_slv2_ui) {
 				cerr << "Found UI" << endl;
-				c_widget = (GtkWidget*)slv2_ui_instance_get_widget(ui);
+				c_widget = (GtkWidget*)slv2_ui_instance_get_widget(_slv2_ui);
 				_gui = Glib::wrap(c_widget);
 				assert(_gui);
 			
@@ -150,6 +167,10 @@ NodeModule::embed_gui(bool embed)
 			_gui_item->raise_to_top();
 
 			_gui->signal_size_request().connect(sigc::mem_fun(this, &NodeModule::gui_size_request));
+		
+			for (PortModelList::const_iterator p = _node->ports().begin(); p != _node->ports().end(); ++p)
+				if ((*p)->is_control() && (*p)->is_output())
+					App::instance().engine()->enable_port_broadcasting((*p)->path());
 
 		} else {
 			cerr << "*** Failed to create canvas item" << endl;
@@ -166,8 +187,15 @@ NodeModule::embed_gui(bool embed)
 			_gui = NULL;
 		}
 
+		slv2_ui_instance_free(_slv2_ui);
+		_slv2_ui = NULL;
+
 		_ports_y_offset = 0;
 		_width = 0; // resize() takes care of it..
+
+		for (PortModelList::const_iterator p = _node->ports().begin(); p != _node->ports().end(); ++p)
+			if ((*p)->is_control() && (*p)->is_output())
+				App::instance().engine()->disable_port_broadcasting((*p)->path());
 	}
 
 	resize();
diff --git a/src/libs/gui/NodeModule.hpp b/src/libs/gui/NodeModule.hpp
index b35822f4..00e5835d 100644
--- a/src/libs/gui/NodeModule.hpp
+++ b/src/libs/gui/NodeModule.hpp
@@ -77,6 +77,8 @@ protected:
 	void add_port(SharedPtr<PortModel> port, bool resize=true);
 	void remove_port(SharedPtr<PortModel> port);
 
+	void control_change(uint32_t index, float control);
+
 	void embed_gui(bool embed);
 	void gui_size_request(Gtk::Requisition* req);
 
@@ -84,6 +86,7 @@ protected:
 	
 	SharedPtr<NodeModel>   _node;
 	NodeMenu*              _menu;
+	SLV2UIInstance         _slv2_ui;
 	Gtk::Widget*           _gui;
 	Gnome::Canvas::Widget* _gui_item;
 };