From 9678996bb97e562fde723bc327e600af7d52e0ef Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Wed, 15 Dec 2010 06:11:04 +0000
Subject: Don't show `split' menu item for modules with only inputs or outputs
 (ticket #128).

git-svn-id: http://svn.drobilla.net/lad/trunk/patchage@2702 a436a847-0d15-0410-975c-d299462d15a1
---
 src/PatchageModule.cpp | 39 +++++++++++++++++++++++++++++++++++++++
 src/PatchageModule.hpp |  5 +++++
 2 files changed, 44 insertions(+)

diff --git a/src/PatchageModule.cpp b/src/PatchageModule.cpp
index 416c2b6..d129e2e 100644
--- a/src/PatchageModule.cpp
+++ b/src/PatchageModule.cpp
@@ -34,6 +34,30 @@ PatchageModule::~PatchageModule()
 	_menu = NULL;
 }
 
+void
+PatchageModule::update_menu()
+{
+	if (!_menu)
+		return;
+
+	if (_type == InputOutput) {
+		bool has_in  = false;
+		bool has_out = false;
+		for (PortVector::iterator p = _ports.begin(); p != _ports.end(); ++p) {
+			if ((*p)->is_input()) {
+				has_in = true;
+			} else {
+				has_out = true;
+			}
+			if (has_in && has_out) {
+				_menu->items()[0].show(); // Show "Split" menu item
+				return;
+			}
+		}
+		_menu->items()[0].hide(); // Hide "Split" menu item
+	}
+}
+
 void
 PatchageModule::create_menu()
 {
@@ -42,6 +66,7 @@ PatchageModule::create_menu()
 	if (_type == InputOutput) {
 		items.push_back(
 			Gtk::Menu_Helpers::MenuElem("_Split", sigc::mem_fun(this, &PatchageModule::split)));
+		update_menu();
 	} else {
 		items.push_back(
 			Gtk::Menu_Helpers::MenuElem("_Join", sigc::mem_fun(this, &PatchageModule::join)));
@@ -90,6 +115,20 @@ PatchageModule::join()
 	_app->refresh();
 }
 
+void
+PatchageModule::add_port(boost::shared_ptr<Port> port)
+{
+	FlowCanvas::Module::add_port(port);
+	update_menu();
+}
+
+void
+PatchageModule::remove_port(boost::shared_ptr<Port> port)
+{
+	FlowCanvas::Module::remove_port(port);
+	update_menu();
+}
+
 void
 PatchageModule::menu_disconnect_all()
 {
diff --git a/src/PatchageModule.hpp b/src/PatchageModule.hpp
index fcab207..a2b67ee 100644
--- a/src/PatchageModule.hpp
+++ b/src/PatchageModule.hpp
@@ -32,10 +32,15 @@ public:
 	PatchageModule(Patchage* app, const std::string& name, ModuleType type, double x=0, double y=0);
 	~PatchageModule();
 
+	void add_port(boost::shared_ptr<Port> port);
+	void remove_port(boost::shared_ptr<Port> port);
+
 	void split();
 	void join();
 
 	void create_menu();
+	void update_menu();
+
 	void load_location();
 	void menu_disconnect_all();
 	void show_dialog() {}
-- 
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