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-rw-r--r--gtk2_ardour/port_matrix.cc730
1 files changed, 730 insertions, 0 deletions
diff --git a/gtk2_ardour/port_matrix.cc b/gtk2_ardour/port_matrix.cc
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+++ b/gtk2_ardour/port_matrix.cc
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+/*
+ Copyright (C) 2002-2007 Paul Davis
+
+ This program 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.
+
+ This program 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 more 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <gtkmm/label.h>
+#include <gtkmm/enums.h>
+#include <gtkmm/image.h>
+#include <gtkmm/stock.h>
+#include <gtkmm/messagedialog.h>
+#include <gtkmm/menu.h>
+#include <gtkmm/menu_elems.h>
+#include <gtkmm/menuitem.h>
+#include <gtkmm/menushell.h>
+#include <glibmm/objectbase.h>
+#include <gtkmm2ext/doi.h>
+#include <ardour/port_insert.h>
+#include "ardour/session.h"
+#include "ardour/io.h"
+#include "ardour/audioengine.h"
+#include "ardour/track.h"
+#include "ardour/audio_track.h"
+#include "ardour/midi_track.h"
+#include "ardour/data_type.h"
+#include "io_selector.h"
+#include "utils.h"
+#include "gui_thread.h"
+#include "i18n.h"
+
+/** Add a port to a group.
+ * @param p Port name, with or without prefix.
+ */
+
+void
+PortGroup::add (std::string const & p)
+{
+ if (prefix.empty() == false && p.substr (0, prefix.length()) == prefix) {
+ ports.push_back (p.substr (prefix.length()));
+ } else {
+ ports.push_back (p);
+ }
+}
+
+/** PortGroupUI constructor.
+ * @param m PortMatrix to work for.
+ * @Param g PortGroup to represent.
+ */
+
+PortGroupUI::PortGroupUI (PortMatrix& m, PortGroup& g)
+ : _port_matrix (m), _port_group (g), _ignore_check_button_toggle (false),
+ _visibility_checkbutton (g.name)
+{
+ int const ports = _port_group.ports.size();
+ int const rows = _port_matrix.n_rows ();
+
+ if (rows == 0 || ports == 0) {
+ return;
+ }
+
+ /* Sort out the table and the checkbuttons inside it */
+
+ _table.resize (rows, ports);
+ _port_checkbuttons.resize (rows);
+ for (int i = 0; i < rows; ++i) {
+ _port_checkbuttons[i].resize (ports);
+ }
+
+ for (int i = 0; i < rows; ++i) {
+ for (uint32_t j = 0; j < _port_group.ports.size(); ++j) {
+ Gtk::CheckButton* b = new Gtk::CheckButton;
+
+ b->signal_toggled().connect (
+ sigc::bind (sigc::mem_fun (*this, &PortGroupUI::port_checkbutton_toggled), b, i, j)
+ );
+
+ _port_checkbuttons[i][j] = b;
+ _table.attach (*b, j, j + 1, i, i + 1);
+ }
+ }
+
+ _table_box.add (_table);
+
+ _ignore_check_button_toggle = true;
+
+ /* Set the state of the check boxes according to current connections */
+ for (int i = 0; i < rows; ++i) {
+ for (uint32_t j = 0; j < _port_group.ports.size(); ++j) {
+ std::string const t = _port_group.prefix + _port_group.ports[j];
+ bool const s = _port_matrix.get_state (i, t);
+ _port_checkbuttons[i][j]->set_active (s);
+ if (s) {
+ _port_group.visible = true;
+ }
+ }
+ }
+
+ _ignore_check_button_toggle = false;
+
+ _visibility_checkbutton.signal_toggled().connect (sigc::mem_fun (*this, &PortGroupUI::visibility_checkbutton_toggled));
+}
+
+/** The visibility of a PortGroupUI has been toggled */
+void
+PortGroupUI::visibility_checkbutton_toggled ()
+{
+ _port_group.visible = _visibility_checkbutton.get_active ();
+ setup_visibility ();
+}
+
+/** @return Width and height of a single checkbutton in a port group table */
+std::pair<int, int>
+PortGroupUI::unit_size () const
+{
+ if (_port_checkbuttons.empty() || _port_checkbuttons[0].empty())
+ {
+ return std::pair<int, int> (0, 0);
+ }
+
+ int r = 0;
+ /* We can't ask for row spacing unless there >1 rows, otherwise we get a warning */
+ if (_table.property_n_rows() > 1) {
+ r = _table.get_row_spacing (0);
+ }
+
+ return std::make_pair (
+ _port_checkbuttons[0][0]->get_width() + _table.get_col_spacing (0),
+ _port_checkbuttons[0][0]->get_height() + r
+ );
+}
+
+/** @return Table widget containing the port checkbuttons */
+Gtk::Widget&
+PortGroupUI::get_table ()
+{
+ return _table_box;
+}
+
+/** @return Checkbutton used to toggle visibility */
+Gtk::Widget&
+PortGroupUI::get_visibility_checkbutton ()
+{
+ return _visibility_checkbutton;
+}
+
+
+/** Handle a toggle of a port check button */
+void
+PortGroupUI::port_checkbutton_toggled (Gtk::CheckButton* b, int r, int c)
+{
+ if (_ignore_check_button_toggle == false) {
+ _port_matrix.set_state (r, _port_group.prefix + _port_group.ports[c], b->get_active());
+ }
+}
+
+/** Set up visibility of the port group according to PortGroup::visible */
+void
+PortGroupUI::setup_visibility ()
+{
+ if (_port_group.visible) {
+ _table_box.show ();
+ } else {
+ _table_box.hide ();
+ }
+
+ if (_visibility_checkbutton.get_active () != _port_group.visible) {
+ _visibility_checkbutton.set_active (_port_group.visible);
+ }
+}
+
+
+RotatedLabelSet::RotatedLabelSet (PortGroupList& g)
+ : Glib::ObjectBase ("RotatedLabelSet"), Gtk::Widget (), _port_group_list (g), _base_width (128)
+{
+ set_flags (Gtk::NO_WINDOW);
+ set_angle (30);
+}
+
+RotatedLabelSet::~RotatedLabelSet ()
+{
+
+}
+
+
+/** Set the angle that the labels are drawn at.
+ * @param degrees New angle in degrees.
+ */
+
+void
+RotatedLabelSet::set_angle (int degrees)
+{
+ _angle_degrees = degrees;
+ _angle_radians = M_PI * _angle_degrees / 180;
+
+ queue_resize ();
+}
+
+void
+RotatedLabelSet::on_size_request (Gtk::Requisition* requisition)
+{
+ *requisition = Gtk::Requisition ();
+
+ if (_pango_layout == 0) {
+ return;
+ }
+
+ /* Our height is the highest label */
+ requisition->height = 0;
+ for (PortGroupList::const_iterator i = _port_group_list.begin(); i != _port_group_list.end(); ++i) {
+ for (std::vector<std::string>::const_iterator j = (*i)->ports.begin(); j != (*i)->ports.end(); ++j) {
+ std::pair<int, int> const d = setup_layout (*j);
+ if (d.second > requisition->height) {
+ requisition->height = d.second;
+ }
+ }
+ }
+
+ /* And our width is the base plus the width of the last label */
+ requisition->width = _base_width;
+ int const n = _port_group_list.n_visible_ports ();
+ if (n > 0) {
+ std::pair<int, int> const d = setup_layout (_port_group_list.get_port_by_index (n - 1, false));
+ requisition->width += d.first;
+ }
+}
+
+void
+RotatedLabelSet::on_size_allocate (Gtk::Allocation& allocation)
+{
+ set_allocation (allocation);
+
+ if (_gdk_window) {
+ _gdk_window->move_resize (
+ allocation.get_x(), allocation.get_y(), allocation.get_width(), allocation.get_height()
+ );
+ }
+}
+
+void
+RotatedLabelSet::on_realize ()
+{
+ Gtk::Widget::on_realize ();
+
+ Glib::RefPtr<Gtk::Style> style = get_style ();
+
+ if (!_gdk_window) {
+ GdkWindowAttr attributes;
+ memset (&attributes, 0, sizeof (attributes));
+
+ Gtk::Allocation allocation = get_allocation ();
+ attributes.x = allocation.get_x ();
+ attributes.y = allocation.get_y ();
+ attributes.width = allocation.get_width ();
+ attributes.height = allocation.get_height ();
+
+ attributes.event_mask = get_events () | Gdk::EXPOSURE_MASK;
+ attributes.window_type = GDK_WINDOW_CHILD;
+ attributes.wclass = GDK_INPUT_OUTPUT;
+
+ _gdk_window = Gdk::Window::create (get_window (), &attributes, GDK_WA_X | GDK_WA_Y);
+ unset_flags (Gtk::NO_WINDOW);
+ set_window (_gdk_window);
+
+ _bg_colour = style->get_bg (Gtk::STATE_NORMAL );
+ modify_bg (Gtk::STATE_NORMAL, _bg_colour);
+ _fg_colour = style->get_fg (Gtk::STATE_NORMAL);
+;
+ _gdk_window->set_user_data (gobj ());
+
+ /* Set up Pango stuff */
+ _pango_context = create_pango_context ();
+
+ Pango::Matrix matrix = PANGO_MATRIX_INIT;
+ pango_matrix_rotate (&matrix, _angle_degrees);
+ _pango_context->set_matrix (matrix);
+
+ _pango_layout = Pango::Layout::create (_pango_context);
+ _gc = Gdk::GC::create (get_window ());
+ }
+}
+
+void
+RotatedLabelSet::on_unrealize()
+{
+ _gdk_window.clear ();
+
+ Gtk::Widget::on_unrealize ();
+}
+
+
+/** Set up our Pango layout to plot a given string, and compute its dimensions once
+ * it has been rotated.
+ * @param s String to use.
+ * @return width and height of the rotated string, in pixels.
+ */
+
+std::pair<int, int>
+RotatedLabelSet::setup_layout (std::string const & s)
+{
+ _pango_layout->set_text (s);
+
+ /* Here's the unrotated size */
+ int w;
+ int h;
+ _pango_layout->get_pixel_size (w, h);
+
+ /* Rotate the width and height as appropriate. I thought Pango might be able
+ to do this for us, but I can't find out how... */
+ std::pair<int, int> d;
+ d.first = int (w * cos (_angle_radians) - h * sin (_angle_radians));
+ d.second = int (w * sin (_angle_radians) + h * cos (_angle_radians));
+
+ return d;
+}
+
+bool
+RotatedLabelSet::on_expose_event (GdkEventExpose* event)
+{
+ if (!_gdk_window) {
+ return true;
+ }
+
+ int const height = get_allocation().get_height ();
+ double const spacing = double (_base_width) / _port_group_list.n_visible_ports();
+
+ /* Plot all the visible labels; really we should clip for efficiency */
+ int n = 0;
+ for (PortGroupList::const_iterator i = _port_group_list.begin(); i != _port_group_list.end(); ++i) {
+ if ((*i)->visible) {
+ for (uint32_t j = 0; j < (*i)->ports.size(); ++j) {
+ std::pair<int, int> const d = setup_layout ((*i)->ports[j]);
+ get_window()->draw_layout (_gc, int ((n + 0.25) * spacing), height - d.second, _pango_layout, _fg_colour, _bg_colour);
+ ++n;
+ }
+ }
+ }
+
+ return true;
+}
+
+/** Set the `base width'. This is the width of the base of the label set, ie:
+ *
+ * L L L L
+ * E E E E
+ * B B B B
+ * A A A A
+ * L L L L
+ * <--w-->
+ */
+
+void
+RotatedLabelSet::set_base_width (int w)
+{
+ _base_width = w;
+ queue_resize ();
+}
+
+
+PortMatrix::PortMatrix (ARDOUR::Session& session, ARDOUR::DataType type, bool offer_inputs, PortGroupList::Mask mask)
+ : _offer_inputs (offer_inputs), _port_group_list (session, type, offer_inputs, mask), _type (type),
+ _column_labels (_port_group_list)
+{
+ _row_labels_vbox[0] = _row_labels_vbox[1] = 0;
+ _side_vbox_pad[0] = _side_vbox_pad[1] = 0;
+
+ pack_start (_visibility_checkbutton_box, false, false);
+
+ _side_vbox[0].pack_start (*Gtk::manage (new Gtk::Label ("")));
+ _overall_hbox.pack_start (_side_vbox[0], false, false);
+ _scrolled_window.set_policy (Gtk::POLICY_ALWAYS, Gtk::POLICY_NEVER);
+ _scrolled_window.set_shadow_type (Gtk::SHADOW_NONE);
+ Gtk::VBox* b = new Gtk::VBox;
+ b->pack_start (_column_labels, false, false);
+ b->pack_start (_port_group_hbox, false, false);
+ Gtk::Alignment* a = new Gtk::Alignment (0, 1, 0, 0);
+ a->add (*Gtk::manage (b));
+ _scrolled_window.add (*Gtk::manage (a));
+ _overall_hbox.pack_start (_scrolled_window);
+ _side_vbox[1].pack_start (*Gtk::manage (new Gtk::Label ("")));
+ _overall_hbox.pack_start (_side_vbox[1]);
+ pack_start (_overall_hbox);
+
+ _port_group_hbox.signal_size_allocate().connect (sigc::hide (sigc::mem_fun (*this, &IOSelector::setup_dimensions)));
+}
+
+PortMatrix::~PortMatrix ()
+{
+ clear ();
+}
+
+/** Clear out the things that change when the number of source or destination ports changes */
+void
+PortMatrix::clear ()
+{
+ for (int i = 0; i < 2; ++i) {
+
+ for (std::vector<Gtk::EventBox*>::iterator j = _row_labels[i].begin(); j != _row_labels[i].end(); ++j) {
+ delete *j;
+ }
+ _row_labels[i].clear ();
+
+ if (_row_labels_vbox[i]) {
+ _side_vbox[i].remove (*_row_labels_vbox[i]);
+ }
+ delete _row_labels_vbox[i];
+ _row_labels_vbox[i] = 0;
+
+ if (_side_vbox_pad[i]) {
+ _side_vbox[i].remove (*_side_vbox_pad[i]);
+ }
+ delete _side_vbox_pad[i];
+ _side_vbox_pad[i] = 0;
+ }
+
+ for (std::vector<PortGroupUI*>::iterator i = _port_group_ui.begin(); i != _port_group_ui.end(); ++i) {
+ _port_group_hbox.remove ((*i)->get_table());
+ _visibility_checkbutton_box.remove ((*i)->get_visibility_checkbutton());
+ delete *i;
+ }
+
+ _port_group_ui.clear ();
+}
+
+
+/** Set up dimensions of some of our widgets which depend on other dimensions
+ * within the dialogue.
+ */
+void
+PortMatrix::setup_dimensions ()
+{
+ /* Get some dimensions from various places */
+ int const scrollbar_height = _scrolled_window.get_hscrollbar()->get_height();
+
+ std::pair<int, int> unit_size (0, 0);
+ int port_group_tables_height = 0;
+ for (std::vector<PortGroupUI*>::iterator i = _port_group_ui.begin(); i != _port_group_ui.end(); ++i) {
+ std::pair<int, int> const u = (*i)->unit_size ();
+ unit_size.first = std::max (unit_size.first, u.first);
+ unit_size.second = std::max (unit_size.second, u.second);
+ port_group_tables_height = std::max (
+ port_group_tables_height, (*i)->get_table().get_height()
+ );
+ }
+
+ /* Column labels */
+ _column_labels.set_base_width (_port_group_list.n_visible_ports () * unit_size.first);
+
+ /* Scrolled window */
+ /* XXX: really shouldn't set a minimum horizontal size here, but if we don't
+ the window starts up very small */
+ _scrolled_window.set_size_request (
+ std::min (_column_labels.get_width(), 640),
+ _column_labels.get_height() + port_group_tables_height + scrollbar_height + 16
+ );
+
+ /* Row labels */
+ for (int i = 0; i < 2; ++i) {
+ for (std::vector<Gtk::EventBox*>::iterator j = _row_labels[i].begin(); j != _row_labels[i].end(); ++j) {
+ (*j)->get_child()->set_size_request (-1, unit_size.second);
+ }
+
+ if (_side_vbox_pad[i]) {
+ _side_vbox_pad[i]->set_size_request (-1, scrollbar_height + unit_size.second / 4);
+ }
+ }
+}
+
+
+/** Set up the dialogue */
+void
+PortMatrix::setup ()
+{
+ clear ();
+
+ int const rows = n_rows ();
+
+ /* Row labels */
+ for (int i = 0; i < 2; ++i) {
+ _row_labels_vbox[i] = new Gtk::VBox;
+ int const run_rows = std::max (1, rows);
+ for (int j = 0; j < run_rows; ++j) {
+ Gtk::Label* label = new Gtk::Label (rows == 0 ? "Quim" : row_name (j));
+ Gtk::EventBox* b = new Gtk::EventBox;
+ b->set_events (Gdk::BUTTON_PRESS_MASK);
+ b->signal_button_press_event().connect (sigc::bind (sigc::mem_fun (*this, &IOSelector::row_label_button_pressed), j));
+ b->add (*Gtk::manage (label));
+ _row_labels[i].push_back (b);
+ _row_labels_vbox[i]->pack_start (*b, false, false);
+ }
+
+ _side_vbox[i].pack_start (*_row_labels_vbox[i], false, false);
+ _side_vbox_pad[i] = new Gtk::Label ("");
+ _side_vbox[i].pack_start (*_side_vbox_pad[i], false, false);
+ }
+
+ /* Checkbutton tables and visibility checkbuttons */
+ int n = 0;
+ for (PortGroupList::iterator i = _port_group_list.begin(); i != _port_group_list.end(); ++i) {
+ PortGroupUI* t = new PortGroupUI (*this, **i);
+
+ /* XXX: this is a bit of a hack; should probably use a configurable colour here */
+ Gdk::Color alt_bg = get_style()->get_bg (Gtk::STATE_NORMAL);
+ alt_bg.set_rgb (alt_bg.get_red() + 4096, alt_bg.get_green() + 4096, alt_bg.get_blue () + 4096);
+ if ((n % 2) == 0) {
+ t->get_table().modify_bg (Gtk::STATE_NORMAL, alt_bg);
+ }
+
+ _port_group_ui.push_back (t);
+ _port_group_hbox.pack_start (t->get_table(), false, false);
+
+ _visibility_checkbutton_box.pack_start (t->get_visibility_checkbutton(), false, false);
+ ++n;
+ }
+
+ show_all ();
+
+ for (std::vector<PortGroupUI*>::iterator i = _port_group_ui.begin(); i != _port_group_ui.end(); ++i) {
+ (*i)->setup_visibility ();
+ }
+
+}
+
+void
+PortMatrix::redisplay ()
+{
+ _port_group_list.refresh ();
+ setup ();
+}
+
+
+/** Handle a button press on a row label */
+bool
+PortMatrix::row_label_button_pressed (GdkEventButton* e, int r)
+{
+ if (e->type != GDK_BUTTON_PRESS || e->button != 3) {
+ return false;
+ }
+
+ Gtk::Menu* menu = Gtk::manage (new Gtk::Menu);
+ Gtk::Menu_Helpers::MenuList& items = menu->items ();
+ menu->set_name ("ArdourContextMenu");
+
+ bool const can_add = maximum_rows () > n_rows ();
+ bool const can_remove = minimum_rows () < n_rows ();
+ std::string const name = row_name (r);
+
+ items.push_back (
+ Gtk::Menu_Helpers::MenuElem (string_compose(_("Add %1"), row_descriptor()), sigc::mem_fun (*this, &PortMatrix::add_row))
+ );
+
+ items.back().set_sensitive (can_add);
+
+ items.push_back (
+ Gtk::Menu_Helpers::MenuElem (string_compose(_("Remove %1 \"%2\""), row_descriptor(), name), sigc::bind (sigc::mem_fun (*this, &PortMatrix::remove_row), r))
+ );
+
+ items.back().set_sensitive (can_remove);
+
+ menu->popup (e->button, e->time);
+
+ return true;
+}
+
+void
+PortMatrix::set_type (ARDOUR::DataType t)
+{
+ _type = t;
+ _port_group_list.set_type (t);
+ redisplay ();
+}
+
+void
+PortMatrix::set_offer_inputs (bool i)
+{
+ _offer_inputs = i;
+ _port_group_list.set_offer_inputs (i);
+ redisplay ();
+}
+
+/** PortGroupList constructor.
+ * @param session Session to get ports from.
+ * @param type Type of ports to offer (audio or MIDI)
+ * @param offer_inputs true to offer output ports, otherwise false.
+ * @param mask Mask of groups to make visible by default.
+ */
+
+PortGroupList::PortGroupList (ARDOUR::Session & session, ARDOUR::DataType type, bool offer_inputs, Mask mask)
+ : _session (session), _type (type), _offer_inputs (offer_inputs),
+ buss (_("Buss"), "ardour:", mask & BUSS),
+ track (_("Track"), "ardour:", mask & TRACK),
+ system (_("System"), "system:", mask & SYSTEM),
+ other (_("Other"), "", mask & OTHER)
+{
+ refresh ();
+}
+
+void
+PortGroupList::refresh ()
+{
+ clear ();
+
+ buss.ports.clear ();
+ track.ports.clear ();
+ system.ports.clear ();
+ other.ports.clear ();
+
+ /* Find the ports provided by ardour; we can't derive their type just from their
+ names, so we'll have to be more devious. */
+
+ boost::shared_ptr<ARDOUR::Session::RouteList> routes = _session.get_routes ();
+
+ for (ARDOUR::Session::RouteList::const_iterator i = routes->begin(); i != routes->end(); ++i) {
+
+ PortGroup* g = 0;
+ if (_type == ARDOUR::DataType::AUDIO && dynamic_cast<ARDOUR::AudioTrack*> ((*i).get())) {
+ /* Audio track for an audio IO */
+ g = &track;
+ } else if (_type == ARDOUR::DataType::MIDI && dynamic_cast<ARDOUR::MidiTrack*> ((*i).get())) {
+ /* Midi track for a MIDI IO */
+ g = &track;
+ } else if (_type == ARDOUR::DataType::AUDIO && dynamic_cast<ARDOUR::MidiTrack*> ((*i).get()) == 0) {
+ /* Non-MIDI track for an Audio IO; must be an audio buss */
+ g = &buss;
+ }
+
+ if (g) {
+ ARDOUR::PortSet const & p = _offer_inputs ? ((*i)->inputs()) : ((*i)->outputs());
+ for (uint32_t j = 0; j < p.num_ports(); ++j) {
+ g->add (p.port(j)->name ());
+ }
+
+ std::sort (g->ports.begin(), g->ports.end());
+ }
+ }
+
+
+ /* XXX: inserts, sends, plugin inserts? */
+
+ /* Now we need to find the non-ardour ports; we do this by first
+ finding all the ports that we can connect to. */
+ const char **ports = _session.engine().get_ports (
+ "", _type.to_jack_type(), _offer_inputs ? JackPortIsInput : JackPortIsOutput
+ );
+
+ if (ports) {
+
+ int n = 0;
+ while (ports[n]) {
+ std::string const p = ports[n];
+
+ if (p.substr(0, strlen ("system:")) == "system:") {
+ /* system: prefix */
+ system.add (p);
+ } else {
+ if (p.substr(0, strlen("ardour:")) != "ardour:") {
+ /* other (non-ardour) prefix */
+ other.add (p);
+ }
+ }
+
+ ++n;
+ }
+ }
+
+ push_back (&buss);
+ push_back (&track);
+ push_back (&system);
+ push_back (&other);
+}
+
+int
+PortGroupList::n_visible_ports () const
+{
+ int n = 0;
+
+ for (const_iterator i = begin(); i != end(); ++i) {
+ if ((*i)->visible) {
+ n += (*i)->ports.size();
+ }
+ }
+
+ return n;
+}
+
+std::string
+PortGroupList::get_port_by_index (int n, bool with_prefix) const
+{
+ /* XXX: slightly inefficient algorithm */
+
+ for (const_iterator i = begin(); i != end(); ++i) {
+ for (std::vector<std::string>::const_iterator j = (*i)->ports.begin(); j != (*i)->ports.end(); ++j) {
+ if (n == 0) {
+ if (with_prefix) {
+ return (*i)->prefix + *j;
+ } else {
+ return *j;
+ }
+ }
+ --n;
+ }
+ }
+
+ return "";
+}
+
+void
+PortGroupList::set_type (ARDOUR::DataType t)
+{
+ _type = t;
+}
+
+void
+PortGroupList::set_offer_inputs (bool i)
+{
+ _offer_inputs = i;
+}
+