gtk2_ardour/connection_editor.cc

   1 /*
   2     Copyright (C) 2002 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18     $Id$
  19 */
  20
  21 #include <map>
  22 #include <vector>
  23 #include <stdint.h>
  24
  25 #include <gtkmm2ext/gtk_ui.h>
  26 #include <gtkmm2ext/utils.h>
  27 #include <sigc++/bind.h>
  28
  29 #include "connection_editor.h"
  30
  31 #include <ardour/session.h>
  32 #include <ardour/session_connection.h>
  33 #include <ardour/audioengine.h>
  34 #include <ardour/connection.h>
  35
  36 #include "utils.h"
  37 #include "keyboard.h"
  38 #include "prompter.h"
  39
  40 #include "i18n.h"
  41
  42 #include <inttypes.h>
  43
  44 using namespace std;
  45 using namespace ARDOUR;
  46 using namespace Gtk;
  47 using namespace sigc;
  48
  49 ConnectionEditor::ConnectionEditor ()
  50         : ArdourDialog ("connection editor"),
  51           input_frame (_("Input Connections")),
  52           output_frame (_("Output Connections")),
  53           new_input_connection_button (_("New Input")),
  54           new_output_connection_button (_("New Output")),
  55           delete_connection_button (_("Delete")),
  56           clear_button (_("Clear")),
  57           add_port_button (_("Add Port")),
  58           ok_button (_("Close")),
  59           cancel_button (_("Cancel")),
  60           rescan_button (_("Rescan"))
  61
  62 {
  63         add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);
  64
  65         session = 0;
  66         selected_port = -1;
  67         current_connection = 0;
  68         push_at_front = false;
  69
  70         set_name ("ConnectionEditorWindow");
  71
  72         ok_button.set_name ("ConnectionEditorButton");
  73         cancel_button.set_name ("ConnectionEditorButton");
  74         rescan_button.set_name ("ConnectionEditorButton");
  75         new_input_connection_button.set_name ("ConnectionEditorButton");
  76         new_output_connection_button.set_name ("ConnectionEditorButton");
  77         clear_button.set_name ("ConnectionEditorButton");
  78
  79         button_frame.set_name ("ConnectionEditorFrame");
  80         input_frame.set_name ("ConnectionEditorFrame");
  81         output_frame.set_name ("ConnectionEditorFrame");
  82
  83         button_box.set_spacing (15);
  84         button_box.set_border_width (5);
  85         Gtkmm2ext::set_size_request_to_display_given_text (ok_button, _("OK"), 40, 15);
  86         button_box.pack_end (ok_button, false, false);
  87         // button_box.pack_end (cancel_button, false, false);
  88         cancel_button.hide();
  89         button_frame.add (button_box);
  90
  91         ok_button.signal_clicked().connect (mem_fun(*this, &ConnectionEditor::accept));
  92         cancel_button.signal_clicked().connect (mem_fun(*this, &ConnectionEditor::cancel));
  93         cancel_button.signal_clicked().connect (mem_fun(*this, &ConnectionEditor::rescan));
  94
  95         notebook.set_name ("ConnectionEditorNotebook");
  96         notebook.set_size_request (-1, 125);
  97
  98         clear_button.set_name ("ConnectionEditorButton");
  99         add_port_button.set_name ("ConnectionEditorButton");
 100         Gtkmm2ext::set_size_request_to_display_given_text (add_port_button, _("Add Port"), 35, 15);
 101
 102         selector_frame.set_name ("ConnectionEditorFrame");
 103         port_frame.set_name ("ConnectionEditorFrame");
 104
 105         selector_frame.set_label (_("Available Ports"));
 106
 107         selector_button_box.set_spacing (5);
 108         selector_button_box.set_border_width (5);
 109         Gtkmm2ext::set_size_request_to_display_given_text (rescan_button, _("Rescan"), 35, 15);
 110         selector_button_box.pack_start (rescan_button, false, false);
 111
 112         selector_box.set_spacing (5);
 113         selector_box.set_border_width (5);
 114         selector_box.pack_start (notebook);
 115         selector_box.pack_start (selector_button_box);
 116
 117         selector_frame.add (selector_box);
 118
 119         port_box.set_spacing (5);
 120         port_box.set_border_width (3);
 121
 122         port_button_box.set_spacing (5);
 123         port_button_box.set_border_width (2);
 124
 125         port_button_box.pack_start (add_port_button, false, false);
 126         port_and_button_box.set_border_width (5);
 127         port_and_button_box.pack_start (port_button_box, false, false);
 128         port_and_button_box.pack_start (port_box);
 129
 130         port_frame.add (port_and_button_box);
 131
 132         port_and_selector_box.set_spacing (5);
 133         port_and_selector_box.pack_start (port_frame);
 134         port_and_selector_box.pack_start (selector_frame);
 135
 136         right_vbox.set_spacing (5);
 137         right_vbox.set_border_width (5);
 138         right_vbox.pack_start (port_and_selector_box);
 139
 140         input_connection_model = ListStore::create (connection_columns);
 141         output_connection_model = ListStore::create (connection_columns);
 142
 143         input_connection_display.set_model (input_connection_model);
 144         output_connection_display.set_model (output_connection_model);
 145
 146         input_connection_display.append_column (_("Connections"), connection_columns.name);
 147         output_connection_display.append_column (_("Connections"), connection_columns.name);
 148
 149         input_connection_display.get_selection()->set_mode(Gtk::SELECTION_SINGLE);
 150         input_connection_display.set_size_request (80, -1);
 151         input_connection_display.set_name ("ConnectionEditorConnectionList");
 152
 153         output_connection_display.get_selection()->set_mode(Gtk::SELECTION_SINGLE);
 154         output_connection_display.set_size_request (80, -1);
 155         output_connection_display.set_name ("ConnectionEditorConnectionList");
 156
 157         input_connection_display.get_selection()->signal_changed().connect (bind (mem_fun(*this, &ConnectionEditor::selection_changed), &input_connection_display));
 158         output_connection_display.get_selection()->signal_changed().connect (bind (mem_fun(*this, &ConnectionEditor::selection_changed), &output_connection_display));
 159
 160
 161         input_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
 162         output_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
 163
 164         input_scroller.add (input_connection_display);
 165         output_scroller.add (output_connection_display);
 166
 167         input_box.set_border_width (5);
 168         input_box.set_spacing (5);
 169         input_box.pack_start (input_scroller);
 170         input_box.pack_start (new_input_connection_button, false, false);
 171         input_frame.add (input_box);
 172
 173         output_box.set_border_width (5);
 174         output_box.set_spacing (5);
 175         output_box.pack_start (output_scroller);
 176         output_box.pack_start (new_output_connection_button, false, false);
 177         output_frame.add (output_box);
 178
 179         connection_box.set_spacing (5);
 180         connection_box.pack_start (input_frame);
 181         connection_box.pack_start (output_frame);
 182
 183         left_vbox.set_spacing (5);
 184         left_vbox.pack_start (connection_box);
 185
 186         main_hbox.set_border_width (10);
 187         main_hbox.set_spacing (5);
 188         main_hbox.pack_start (left_vbox);
 189         main_hbox.pack_start (right_vbox);
 190
 191         main_vbox.set_border_width (10);
 192         main_vbox.set_spacing (5);
 193         main_vbox.pack_start (main_hbox);
 194         main_vbox.pack_start (button_frame, false, false);
 195
 196         set_title (_("ardour: connections"));
 197         add (main_vbox);
 198
 199         // GTK2FIX
 200         // signal_delete_event.connect (bind (ptr_fun (just_hide_it), reinterpret_cast<Window *> (this)));
 201
 202         clear_button.signal_clicked().connect (mem_fun(*this, &ConnectionEditor::clear));
 203         add_port_button.signal_clicked().connect (mem_fun(*this, &ConnectionEditor::add_port));
 204         new_input_connection_button.signal_clicked().connect (bind (mem_fun(*this, &ConnectionEditor::new_connection), true));
 205         new_output_connection_button.signal_clicked().connect (bind (mem_fun(*this, &ConnectionEditor::new_connection), false));
 206         delete_connection_button.signal_clicked().connect (mem_fun(*this, &ConnectionEditor::delete_connection));
 207 }
 208
 209 ConnectionEditor::~ConnectionEditor()
 210 {
 211 }
 212
 213 void
 214 ConnectionEditor::set_session (Session *s)
 215 {
 216         if (s != session) {
 217
 218                 ArdourDialog::set_session (s);
 219
 220                 if (session) {
 221                         session->ConnectionAdded.connect (mem_fun(*this, &ConnectionEditor::proxy_add_connection_and_select));
 222                         session->ConnectionRemoved.connect (mem_fun(*this, &ConnectionEditor::proxy_remove_connection));
 223                 } else {
 224                         hide ();
 225                 }
 226         }
 227 }
 228
 229 void
 230 ConnectionEditor::rescan ()
 231 {
 232         refill_connection_display ();
 233         display_ports ();
 234 }
 235
 236 void
 237 ConnectionEditor::cancel ()
 238 {
 239         hide ();
 240 }
 241
 242 void
 243 ConnectionEditor::accept ()
 244 {
 245         hide ();
 246 }
 247
 248 void
 249 ConnectionEditor::clear ()
 250 {
 251         if (current_connection) {
 252                 current_connection->clear ();
 253         }
 254 }
 255
 256 void
 257 ConnectionEditor::on_map ()
 258 {
 259         refill_connection_display ();
 260         Window::on_map ();
 261 }
 262
 263 void
 264 ConnectionEditor::add_connection (ARDOUR::Connection *connection)
 265 {
 266         TreeModel::Row row;
 267
 268         if (dynamic_cast<InputConnection *> (connection)) {
 269
 270                 if (push_at_front) {
 271                         row = *(input_connection_model->prepend());
 272                 } else {
 273                         row = *(input_connection_model->append());
 274                 }
 275
 276         } else {
 277
 278                 if (push_at_front) {
 279                         row = *(output_connection_model->prepend());
 280                 } else {
 281                         row = *(output_connection_model->append());
 282                 }
 283         }
 284
 285         row[connection_columns.connection] = connection;
 286         row[connection_columns.name] = connection->name();
 287 }
 288
 289 void
 290 ConnectionEditor::remove_connection (ARDOUR::Connection *connection)
 291 {
 292         TreeModel::iterator i;
 293         Glib::RefPtr<TreeModel> model = input_connection_model;
 294
 295         if (dynamic_cast<InputConnection *> (connection) == 0) {
 296                 model = output_connection_model;
 297         }
 298
 299         TreeModel::Children rows = model->children();
 300
 301         for (i = rows.begin(); i != rows.end(); ++i) {
 302                 if ((*i)[connection_columns.connection] == connection) {
 303                         // model->erase (i);
 304                         break;
 305                 }
 306         }
 307 }
 308
 309 void
 310 ConnectionEditor::proxy_add_connection_and_select (ARDOUR::Connection *connection)
 311 {
 312         Gtkmm2ext::UI::instance()->call_slot (bind (mem_fun(*this, &ConnectionEditor::add_connection_and_select), connection));
 313 }
 314
 315 void
 316 ConnectionEditor::proxy_remove_connection (ARDOUR::Connection *connection)
 317 {
 318         Gtkmm2ext::UI::instance()->call_slot (bind (mem_fun(*this, &ConnectionEditor::remove_connection), connection));
 319 }
 320
 321 void
 322 ConnectionEditor::add_connection_and_select (ARDOUR::Connection *connection)
 323 {
 324         add_connection (connection);
 325
 326         // GTK2FIX
 327         // if (dynamic_cast<InputConnection *> (connection)) {
 328         // input_connection_display.rows().front().select ();
 329         // } else {
 330         //      output_connection_display.rows().front().select ();
 331         //}
 332 }
 333
 334 void
 335 ConnectionEditor::refill_connection_display ()
 336 {
 337         input_connection_display.set_model (Glib::RefPtr<TreeModel>(0));
 338         output_connection_display.set_model (Glib::RefPtr<TreeModel>(0));
 339
 340         input_connection_model.clear();
 341         output_connection_model.clear();
 342
 343         current_connection = 0;
 344
 345         if (session) {
 346                 session->foreach_connection (this, &ConnectionEditor::add_connection);
 347         }
 348
 349         input_connection_display.set_model (input_connection_model);
 350         output_connection_display.set_model (output_connection_model);
 351
 352 }
 353
 354 void
 355 ConnectionEditor::selection_changed (TreeView* view)
 356 {
 357         ARDOUR::Connection *old_current = current_connection;
 358
 359         TreeIter iter;
 360         TreeModel::Path path;
 361         Glib::RefPtr<TreeView::Selection> selection = view->get_selection();
 362         Glib::RefPtr<TreeModel> model = view->get_model();
 363         bool input = (view == &input_connection_display);
 364
 365         iter = model->get_iter (path);
 366
 367         current_connection = (*iter)[connection_columns.connection];
 368
 369         if (old_current != current_connection) {
 370                 config_connection.disconnect ();
 371                 connect_connection.disconnect ();
 372         }
 373
 374         if (current_connection) {
 375                 config_connection = current_connection->ConfigurationChanged.connect
 376                         (bind (mem_fun(*this, &ConnectionEditor::configuration_changed), input));
 377                 connect_connection = current_connection->ConnectionsChanged.connect
 378                         (bind (mem_fun(*this, &ConnectionEditor::connections_changed), input));
 379         }
 380
 381         display_connection_state (input);
 382         display_ports ();
 383 }
 384
 385 void
 386 ConnectionEditor::configuration_changed (bool for_input)
 387 {
 388         display_connection_state (for_input);
 389 }
 390
 391 void
 392 ConnectionEditor::connections_changed (int which_port, bool for_input)
 393 {
 394         display_connection_state (for_input);
 395 }
 396
 397 void
 398 ConnectionEditor::display_ports ()
 399 {
 400         if (session == 0 || current_connection == 0) {
 401                 return;
 402         }
 403
 404         using namespace Notebook_Helpers;
 405
 406         typedef std::map<std::string,std::vector<std::pair<std::string,std::string> > > PortMap;
 407         PortMap portmap;
 408         const char **ports;
 409         PageList& pages = notebook.pages();
 410         gint current_page;
 411         vector<string> rowdata;
 412         bool for_input;
 413
 414         current_page = notebook.get_current_page ();
 415         pages.clear ();
 416
 417         /* get relevant current JACK ports */
 418
 419         for_input = (dynamic_cast<InputConnection *> (current_connection) != 0);
 420
 421         ports = session->engine().get_ports ("", JACK_DEFAULT_AUDIO_TYPE, for_input?JackPortIsOutput:JackPortIsInput);
 422
 423         if (ports == 0) {
 424                 return;
 425         }
 426
 427         /* find all the client names and group their ports into a list-by-client */
 428
 429         for (int n = 0; ports[n]; ++n) {
 430
 431                 pair<string,vector<pair<string,string> > > newpair;
 432                 pair<string,string> strpair;
 433                 pair<PortMap::iterator,bool> result;
 434
 435                 string str = ports[n];
 436                 string::size_type pos;
 437                 string portname;
 438
 439                 pos = str.find (':');
 440
 441                 newpair.first = str.substr (0, pos);
 442                 portname = str.substr (pos+1);
 443
 444                 result = portmap.insert (newpair);
 445
 446                 strpair.first = portname;
 447                 strpair.second = str;
 448
 449                 result.first->second.push_back (strpair);
 450         }
 451
 452         PortMap::iterator i;
 453
 454         for (i = portmap.begin(); i != portmap.end(); ++i) {
 455
 456                 Box *client_box = manage (new VBox);
 457                 Gtk::CTreeView *display = manage (new Gtk::TreeView);
 458                 RefPtr<TreeModel> model = TreeModel::create (columns);
 459                 ScrolledWindow *scroller = manage (new ScrolledWindow);
 460
 461                 display->set_selection_mode (GTK_SELECTION_SINGLE);
 462                 display->set_name ("ConnectionEditorList");
 463
 464                 for (vector<pair<string,string> >::iterator s = i->second.begin(); s != i->second.end(); ++s) {
 465
 466                         Row row = model->append ();
 467
 468                         row[displayed_name] = s->first;
 469                         row[full_name] = s->second;
 470                 }
 471
 472                 display->get_selection()->signal_changed().connect (bind (mem_fun(*this, &ConnectionEditor::port_selection_handler), display));
 473
 474                 Label *tab_label = manage (new Label);
 475
 476                 tab_label->set_name ("ConnectionEditorNotebookTab");
 477                 tab_label->set_text ((*i).first);
 478
 479                 display->set_model (model);
 480
 481                 scroller->add (*client_port_display);
 482                 scroller->set_policy (Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
 483
 484                 client_box->pack_start (*scroller);
 485
 486                 pages.push_back (TabElem (*client_box, *tab_label));
 487         }
 488
 489         notebook.set_page (current_page);
 490         notebook.show.connect (bind (mem_fun (notebook, &Notebook::set_page), current_page));
 491         selector_box.show_all ();
 492 }
 493
 494 void
 495 ConnectionEditor::display_connection_state (bool for_input)
 496 {
 497         LockMonitor lm (port_display_lock, __LINE__, __FILE__);
 498         uint32_t limit;
 499
 500         if (session == 0 || current_connection == 0) {
 501                 return;
 502         }
 503
 504         string frame_label = _("Connection \"");
 505         frame_label += current_connection->name();
 506         frame_label += _("\"");
 507         port_frame.set_label (frame_label);
 508
 509         for (slist<ScrolledWindow *>::iterator i = port_displays.begin(); i != port_displays.end(); ) {
 510
 511                 slist<ScrolledWindow *>::iterator tmp;
 512
 513                 tmp = i;
 514                 tmp++;
 515
 516                 port_box.remove (**i);
 517                 delete *i;
 518                 port_displays.erase (i);
 519
 520                 i = tmp;
 521         }
 522
 523         limit = current_connection->nports();
 524
 525         for (uint32_t n = 0; n < limit; ++n) {
 526
 527                 CList *clist;
 528                 ScrolledWindow *scroller;
 529
 530                 const gchar *title[1];
 531                 char buf[32];
 532                 string really_short_name;
 533
 534                 if (for_input) {
 535                         snprintf(buf, sizeof(buf)-1, _("in %d"), n+1);
 536                 } else {
 537                         snprintf(buf, sizeof(buf)-1, _("out %d"), n+1);
 538                 }
 539
 540                 tview = manage (new TreeView());
 541                 Glib::RefPtr<ListStore> port_model = ListStore::create (*port_display_columns);
 542
 543                 tview->set_model (port_model);
 544                 tview->append_column (_(buf), port_display_columns->name);
 545                 tview->set_selection()->set_mode (Gtk::SELECTION_SINGLE);
 546                 tview->set_data ("port", (gpointer) ((intptr_t) n));
 547                 tview->set_headers_visible (true);
 548                 tview->set_name ("ConnectionEditorPortList");
 549                 tview->signal_button_press_event().connect (bind (mem_fun(*this, &ConnectionEditor::port_column_click), clist));
 550
 551                 scroller = manage (new ScrolledWindow);
 552
 553                 scroller->add (*tview);
 554                 scroller->set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
 555
 556                 port_displays.insert (port_displays.end(), scroller);
 557                 port_box.pack_start (*scroller);
 558
 559                 scroller->set_size_request (-1, 75);
 560
 561                 /* now fill the clist with the current connections */
 562
 563                 const ARDOUR::Connection::PortList& connections = current_connection->port_connections (n);
 564
 565                 for (ARDOUR::Connection::PortList::const_iterator i = connections.begin(); i != connections.end(); ++i) {
 566
 567                         TreeModel::Row row = *(model->append());
 568
 569                         row[port_connection_columns.name] = (*i)->name();
 570                 }
 571         }
 572
 573         port_box.show_all ();
 574 }
 575
 576 void
 577 ConnectionEditor::port_selection_changed (TreeView* tview)
 578 {
 579         Glib::RefPtr<TreeView::Selection> sel = tview->get_selection();
 580         TreeModel::iterator iter = sel->get_selected();
 581
 582         if (!current_connection) {
 583                 return;
 584         }
 585
 586         if (iter) {
 587                 TreeModel::Row row = *iter;
 588                 string other_port_name = row[port_display_columns.full_name];
 589
 590
 591         if (current_connection && selected_port >= 0) {
 592                 current_connection->add_connection (selected_port, other_port_name);
 593         }
 594
 595 }
 596
 597 void
 598 ConnectionEditor::add_port ()
 599 {
 600         if (current_connection) {
 601                 current_connection->add_port ();
 602         }
 603 }
 604
 605 void
 606 ConnectionEditor::connection_port_button_press_event (GdkEventButton* ev, TreeView* tview)
 607 {
 608         LockMonitor lm (port_display_lock, __LINE__, __FILE__);
 609
 610         int which_port = reinterpret_cast<intptr_t> (treeview->get_data ("port"));
 611
 612         if (which_port != selected_port) {
 613
 614                 selected_port = which_port;
 615                 display_ports ();
 616
 617                 tview->set_name ("ConnectionEditorPortListSelected");
 618
 619                 for (slist<ScrolledWindow *>::iterator i = port_displays.begin(); i != port_displays.end(); ++i) {
 620
 621                         Widget *child = (*i)->get_child();
 622
 623                         if (static_cast<TreeView *> (child) != tview) {
 624                                 child->set_name ("ConnectionEditorPortList");
 625                                 child->queue_draw ();
 626                         }
 627                 }
 628
 629         } else {
 630
 631                 selected_port = -1;
 632                 clist->set_name ("ConnectionEditorPortList");
 633                 clist->queue_draw();
 634         }
 635 }
 636
 637 void
 638 ConnectionEditor::connection_selection_changed (TreeView* tview);
 639 {
 640         Glib::RefPtr<TreeView::Selection> sel = tview->get_selection();
 641         TreeModel::iterator iter = sel->get_selected();
 642
 643         if (iter) {
 644                 TreeModel::Row row = *iter;
 645                 current_connection = row[XXXX_display_columns.connection];
 646         } else {
 647                 current_connection = 0;
 648         }
 649 }
 650
 651 void
 652 ConnectionEditor::new_connection (bool for_input)
 653 {
 654         string name;
 655
 656         if (session == 0) {
 657                 return;
 658         }
 659
 660         ArdourPrompter prompter (true);
 661         prompter.set_prompt (_("Name for new connection:"));
 662         prompter.done.connect (Gtk::Main::quit.slot());
 663
 664         switch (prompter.run()) {
 665         case GTK_RESPONSE_ACCEPT:
 666                 prompter.get_result (name);
 667                 push_at_front = true;
 668                 if (name.length()) {
 669                         if (for_input) {
 670                                 session->add_connection (new ARDOUR::InputConnection (name));
 671                         } else {
 672                                 session->add_connection (new ARDOUR::OutputConnection (name));
 673                         }
 674                 }
 675                 push_at_front = false;
 676                 break;
 677
 678         default:
 679                 break;
 680         }
 681 }
 682
 683 void
 684 ConnectionEditor::delete_connection ()
 685 {
 686         if (session && current_connection) {
 687                 session->remove_connection (current_connection);
 688                 current_connection = 0;
 689         }
 690 }
 691
 692 gint
 693 ConnectionEditor::port_button_event (GdkEventButton *ev, Treeview* treeview)
 694 {
 695         int row, col;
 696         TreeIter iter;
 697         TreeModel::Path path;
 698         TreeViewColumn* column;
 699         int cellx;
 700         int celly;
 701
 702         if (current_connection == 0) {
 703                 return false;
 704         }
 705
 706         if (!(Keyboard::is_delete_event (ev))) {
 707                 return false;
 708         }
 709
 710         if (!treeview->get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
 711                 return false;
 712         }
 713
 714         if ((iter = treeview->get_model()->get_iter (path))) {
 715                 /* path is valid */
 716
 717                 string port_name = (*iter)[columns.full_name];
 718                 int which_port = (intptr_t) treeview->get_data ("port");
 719
 720                 current_connection->remove_connection (which_port, port_name);
 721         }
 722
 723         return true;
 724 }