From 8450921d5309c5ba677997e7ca722a466c8dc222 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 30 Sep 2007 23:36:39 +0000
Subject: 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
---
 src/libs/gui/NodeModule.cpp | 36 ++++++++++++++++++++++++++++++++----
 src/libs/gui/NodeModule.hpp |  3 +++
 2 files changed, 35 insertions(+), 4 deletions(-)

(limited to 'src/libs/gui')

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;
 };
-- 
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