diff --git a/gtk2_ardour/itest.cc b/gtk2_ardour/itest.cc
new file mode 100644
index 0000000000..7938f6c6e7
--- /dev/null
+++ b/gtk2_ardour/itest.cc
@@ -0,0 +1,204 @@
+#include <map>
+#include <vector>
+#include <string>
+#include <iostream>
+
+#include <gtkmm/main.h>
+#include <gtkmm/window.h>
+#include <gtkmm/box.h>
+#include <gtkmm/scrolledwindow.h>
+#include <gtkmm2ext/dndtreeview.h>
+#include <gtkmm/treemodel.h>
+#include <gtkmm/treestore.h>
+#include <gtkmm/treepath.h>
+#include <gtkmm/button.h>
+#include <gtkmm/window.h>
+#include <jack/jack.h>
+
+using namespace std;
+using namespace sigc;
+using namespace Gtk;
+using namespace Gtkmm2ext;
+using namespace Glib;
+
+struct ModelColumns : public TreeModel::ColumnRecord {
+    ModelColumns() { 
+	    add (used);
+	    add (text);
+	    add (port);
+    }
+    TreeModelColumn<bool>         used;
+    TreeModelColumn<ustring>      text;
+    TreeModelColumn<jack_port_t*> port;
+};
+
+jack_client_t* jack;
+
+void
+fill_it (RefPtr<TreeStore> model, TreeView* display, ModelColumns* columns)
+{
+	RefPtr<TreeModel> old = display->get_model();
+	display->set_model (RefPtr<TreeStore>(0));
+
+	model->clear ();
+	
+	const char ** ports;
+	typedef map<string,vector<pair<string,string> > > PortMap;
+	PortMap portmap;
+	PortMap::iterator i;
+	
+	ports = jack_get_ports (jack, "", JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput);
+
+	if (ports == 0) {
+		goto out;
+	}
+
+	/* find all the client names and group their ports into a list-by-client */
+	
+	for (int n = 0; ports[n]; ++n) {
+
+		pair<string,vector<pair<string,string> > > newpair;
+		pair<string,string> strpair;
+		std::pair<PortMap::iterator,bool> result;
+
+		string str = ports[n];
+		string::size_type pos;
+		string portname;
+
+		pos = str.find (':');
+
+		newpair.first = str.substr (0, pos); 
+		portname = str.substr (pos+1);
+
+		/* this may or may not succeed at actually inserting. 
+		   we don't care, however: we just want an iterator
+		   that gives us either the inserted element or
+		   the existing one with the same name.
+		*/
+
+		result = portmap.insert (newpair);
+
+		strpair.first = portname;
+		strpair.second = str;
+
+		result.first->second.push_back (strpair);
+	}
+
+
+	for (i = portmap.begin(); i != portmap.end(); ++i) {
+
+		/* i->first is a client name, i->second is a PortMap of all of its ports */
+
+		TreeModel::Row parent = *(model->append());
+
+		parent[columns->used] = false;
+		parent[columns->text] = i->first;
+		parent[columns->port] = 0;
+
+		for (vector<pair<string,string> >::iterator s = i->second.begin(); s != i->second.end(); ++s) {
+
+			/* s->first is a port name */
+			
+			TreeModel::Row row = *(model->append (parent.children()));
+
+			row[columns->used] = ((random()%2) == 1);
+			row[columns->text] = s->first;
+			row[columns->port] = (jack_port_t*) random();
+		}
+	}
+
+  out:
+	display->set_model (old);
+}
+
+void
+selection_changed (RefPtr<TreeModel> model, TreeView* display, ModelColumns* columns)
+{
+//	TreeSelection::ListHandle_Path selection = display->get_selection()->get_selected_rows ();
+//
+//	for (TreeSelection::ListHandle_Path::iterator x = selection.begin(); x != selection.end(); ++x) {
+//		cerr << "selected: " << (*(model->get_iter (*x)))[columns->text] << endl;
+//	}
+}
+
+bool
+selection_filter (const RefPtr<TreeModel>& model, const TreeModel::Path& path, bool yn, ModelColumns* columns)
+{
+	return (*(model->get_iter (path)))[columns->port] != 0;
+}
+
+void
+object_drop (string type, uint32_t cnt, void** ptr)
+{
+	cerr << "Got an object drop of " << cnt << " pointer(s) of type " << type << endl;
+}
+
+int
+main (int argc, char* argv[])
+{
+	Main app (&argc, &argv);
+	Window win;
+	VBox   vpacker;
+	HBox   hpacker;
+	Button rescan ("rescan");
+	ScrolledWindow scrollerA;
+	ScrolledWindow scrollerB;
+	DnDTreeView displayA;
+	DnDTreeView displayB;
+	ModelColumns columns;
+
+	if ((jack = jack_client_new ("itest")) == NULL) {
+		return -1;
+	}
+
+	RefPtr<TreeStore> modelA = TreeStore::create (columns);
+	RefPtr<TreeStore> modelB = TreeStore::create (columns);
+	
+	displayA.set_model (modelA);
+	displayA.append_column ("Use", columns.used);
+	displayA.append_column ("Source/Port", columns.text);
+	displayA.set_reorderable (true);
+	displayA.add_object_drag (columns.port.index(), "ports");
+	displayA.signal_object_drop.connect (ptr_fun (object_drop));
+	
+	displayA.get_selection()->set_mode (SELECTION_MULTIPLE);
+	displayA.get_selection()->set_select_function (bind (ptr_fun (selection_filter), &columns));
+	displayA.get_selection()->signal_changed().connect (bind (ptr_fun (selection_changed), modelA, &displayA, &columns));
+
+	displayB.set_model (modelB);
+	displayB.append_column ("Use", columns.used);
+	displayB.append_column ("Source/Port", columns.text);
+	displayB.set_reorderable (true);
+	displayB.add_object_drag (columns.port.index(), "ports");
+	displayB.signal_object_drop.connect (ptr_fun (object_drop));
+
+	displayB.get_selection()->set_mode (SELECTION_MULTIPLE);
+	displayB.get_selection()->set_select_function (bind (ptr_fun (selection_filter), &columns));
+	displayB.get_selection()->signal_changed().connect (bind (ptr_fun (selection_changed), modelB, &displayB, &columns));
+
+	scrollerA.add (displayA);
+	scrollerB.add (displayB);
+
+	hpacker.pack_start (scrollerA);
+	hpacker.pack_start (scrollerB);
+
+	vpacker.pack_start (hpacker);
+	vpacker.pack_start (rescan, false, false);
+	
+	win.add (vpacker);
+	win.set_size_request (500, 400);
+	win.show_all ();
+	
+	rescan.signal_clicked().connect (bind (ptr_fun (fill_it), modelA, &displayA, &columns));
+	rescan.signal_clicked().connect (bind (ptr_fun (fill_it), modelB, &displayB, &columns));
+	
+	fill_it (modelA, &displayA, &columns);
+	fill_it (modelB, &displayB, &columns);
+
+	displayA.expand_all();
+	displayB.expand_all();
+
+	app.run ();
+
+	jack_client_close (jack);
+}