X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Fio_selector.cc;h=16576a0b8ff358a8bdffe0b04e4a0aa4f622d050;hb=e11b3f90c2d02735a071d526d67cfd0de90cbac3;hp=03cf09c0426e8ed49aa88e2f445d8f507ed27846;hpb=465a64520f163ee850c147d1b52c3ef0db8ae764;p=ardour.git diff --git a/gtk2_ardour/io_selector.cc b/gtk2_ardour/io_selector.cc index 03cf09c042..16576a0b8f 100644 --- a/gtk2_ardour/io_selector.cc +++ b/gtk2_ardour/io_selector.cc @@ -17,17 +17,11 @@ */ -#include -#include -#include -#include #include -#include -#include -#include -#include #include + #include + #include #include "ardour/session.h" #include "ardour/io.h" @@ -36,562 +30,144 @@ #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); - } -} - +using namespace ARDOUR; +using namespace Gtk; -PortGroupTable::PortGroupTable ( - PortGroup& g, boost::shared_ptr io, bool for_input - ) - : _port_group (g), _ignore_check_button_toggle (false), - _io (io), _for_input (for_input) +IOSelector::IOSelector (ARDOUR::Session& session, boost::shared_ptr io, bool offer_inputs) + : PortMatrix ( + session, io->default_type(), !offer_inputs, + PortGroupList::Mask (PortGroupList::BUSS | PortGroupList::SYSTEM | PortGroupList::OTHER) + ), + _io (io) { - ARDOUR::DataType const t = _io->default_type(); - - int rows; - if (_for_input) { - rows = _io->n_inputs().get(t); + /* Listen for ports changing on the IO */ + if (_offer_inputs) { + _io->input_changed.connect (mem_fun(*this, &IOSelector::ports_changed)); } else { - rows = _io->n_outputs().get(t); - } - - int const ports = _port_group.ports.size(); - - if (rows == 0 || ports == 0) { - return; - } - - /* Sort out the table and the checkbuttons inside it */ - - _table.resize (rows, ports); - _check_buttons.resize (rows); - for (int i = 0; i < rows; ++i) { - _check_buttons[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, &PortGroupTable::check_button_toggled), b, i, _port_group.prefix + _port_group.ports[j])); - _check_buttons[i][j] = b; - _table.attach (*b, j, j + 1, i, i + 1); - } - } - - _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) { - const char **connections = _for_input ? _io->input(i)->get_connections() : _io->output(i)->get_connections(); - for (uint32_t j = 0; j < _port_group.ports.size(); ++j) { - - std::string const t = _port_group.prefix + _port_group.ports[j]; - int k = 0; - bool required_state = false; - - while (connections && connections[k]) { - if (std::string(connections[k]) == t) { - required_state = true; - break; - } - ++k; - } - - _check_buttons[i][j]->set_active (required_state); - } - } - - _ignore_check_button_toggle = false; -} - -/** @return Width and height of a single check button in a port group table */ -std::pair -PortGroupTable::unit_size () const -{ - if (_check_buttons.empty() || _check_buttons[0].empty()) { - return std::pair (0, 0); + _io->output_changed.connect (mem_fun(*this, &IOSelector::ports_changed)); } - return std::make_pair ( - _check_buttons[0][0]->get_width() + _table.get_col_spacing (0), - _check_buttons[0][0]->get_height() + _table.get_row_spacing (0) - ); -} - -Gtk::Widget& -PortGroupTable::get_widget () -{ - return _box; -} - - -/** Handle a toggle of a check button */ -void -PortGroupTable::check_button_toggled (Gtk::CheckButton* b, int r, std::string const & p) -{ - if (_ignore_check_button_toggle) { - return; - } - - bool const new_state = b->get_active (); - - if (new_state) { - if (_for_input) { - _io->connect_input (_io->input(r), p, 0); - } else { - _io->connect_output (_io->output(r), p, 0); - } - } else { - if (_for_input) { - _io->disconnect_input (_io->input(r), p, 0); - } else { - _io->disconnect_output (_io->output(r), p, 0); - } - } -} - - -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; - } + /* this got lost in a merge from 2.0 */ - /* 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::const_iterator j = i->ports.begin(); j != i->ports.end(); ++j) { - std::pair const d = setup_layout (*j); - if (d.second > requisition->height) { - requisition->height = d.second; - } - } - } + // set_button_sensitivity (); + // io->name_changed.connect (mem_fun(*this, &IOSelector::name_changed)); - /* And our width is the base plus the width of the last label */ - requisition->width = _base_width; - int const n = _port_group_list.n_ports (); - if (n > 0) { - std::pair 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) +IOSelector::ports_changed (ARDOUR::IOChange change, void *src) { - set_allocation (allocation); + ENSURE_GUI_THREAD (bind (mem_fun (*this, &IOSelector::ports_changed), change, src)); - if (_gdk_window) { - _gdk_window->move_resize ( - allocation.get_x(), allocation.get_y(), allocation.get_width(), allocation.get_height() - ); - } + redisplay (); } -void -RotatedLabelSet::on_realize () -{ - Gtk::Widget::on_realize (); - - Glib::RefPtr 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 -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 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; +IOSelector::set_state (int r, std::string const & p, bool s) +{ + if (s) { + if (!_offer_inputs) { + _io->connect_input (_io->input(r), p, 0); + } else { + _io->connect_output (_io->output(r), p, 0); + } + } else { + if (!_offer_inputs) { + _io->disconnect_input (_io->input(r), p, 0); + } else { + _io->disconnect_output (_io->output(r), p, 0); + } + } } bool -RotatedLabelSet::on_expose_event (GdkEventExpose* event) +IOSelector::get_state (int r, std::string const & p) const { - if (!_gdk_window) { - return true; + vector connections; + + if (_offer_inputs) { + _io->output(r)->get_connections (connections); + } else { + _io->input(r)->get_connections (connections); } - int const height = get_allocation().get_height (); - double const spacing = double (_base_width) / _port_group_list.n_ports(); + int k = 0; + for (vector::iterator i = connections.begin(); i != connections.end(); ++i) { - /* Plot all the 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) { - for (uint32_t j = 0; j < i->ports.size(); ++j) { - std::pair 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; + if ((*i)== p) { + return true; } + + ++k; } - return true; + return false; } -/** 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 (); -} - - -/** Construct an IOSelector. - * @param session Session to operate on. - * @param io IO to operate on. - * @param for_input true if the selector is for an input, otherwise false. - */ - -IOSelector::IOSelector (ARDOUR::Session& session, boost::shared_ptr io, bool for_input) - : _port_group_list (session, io, for_input), _io (io), _for_input (for_input), - _row_labels_vbox (0), _column_labels (_port_group_list), _left_vbox_pad (0) +uint32_t +IOSelector::n_rows () const { - _left_vbox.pack_start (*Gtk::manage (new Gtk::Label (""))); - _overall_hbox.pack_start (_left_vbox, 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); - pack_start (_overall_hbox); - - _port_group_hbox.signal_size_allocate().connect (sigc::hide (sigc::mem_fun (*this, &IOSelector::setup_dimensions))); - - /* Listen for ports changing on the IO */ - if (_for_input) { - _io->input_changed.connect (mem_fun(*this, &IOSelector::ports_changed)); + if (!_offer_inputs) { + return _io->inputs().num_ports (_io->default_type()); } else { - _io->output_changed.connect (mem_fun(*this, &IOSelector::ports_changed)); + return _io->outputs().num_ports (_io->default_type()); } - -} - -IOSelector::~IOSelector () -{ - clear (); } -/** Clear out the things that change when the number of source or destination ports changes */ -void -IOSelector::clear () +uint32_t +IOSelector::maximum_rows () const { - for (std::vector::iterator i = _row_labels.begin(); i != _row_labels.end(); ++i) { - delete *i; - } - _row_labels.clear (); - - if (_row_labels_vbox) { - _left_vbox.remove (*_row_labels_vbox); - } - delete _row_labels_vbox; - _row_labels_vbox = 0; - - if (_left_vbox_pad) { - _left_vbox.remove (*_left_vbox_pad); - } - delete _left_vbox_pad; - _left_vbox_pad = 0; - - for (std::vector::iterator i = _port_group_tables.begin(); i != _port_group_tables.end(); ++i) { - _port_group_hbox.remove ((*i)->get_widget()); - delete *i; + if (!_offer_inputs) { + return _io->input_maximum ().get (_io->default_type()); + } else { + return _io->output_maximum ().get (_io->default_type()); } - - _port_group_tables.clear (); } -/** Set up dimensions of some of our widgets which depend on other dimensions - * within the dialogue. - */ -void -IOSelector::setup_dimensions () +uint32_t +IOSelector::minimum_rows () const { - /* Get some dimensions from various places */ - int const scrollbar_height = _scrolled_window.get_hscrollbar()->get_height(); - - std::pair unit_size (0, 0); - int port_group_tables_height = 0; - for (std::vector::iterator i = _port_group_tables.begin(); i != _port_group_tables.end(); ++i) { - std::pair 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_widget().get_height() - ); - } - - /* Column labels */ - _column_labels.set_base_width (_port_group_list.n_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 (std::vector::iterator i = _row_labels.begin(); i != _row_labels.end(); ++i) { - (*i)->get_child()->set_size_request (-1, unit_size.second); - } - - - if (_left_vbox_pad) { - _left_vbox_pad->set_size_request (-1, scrollbar_height + unit_size.second / 4); + if (!_offer_inputs) { + return _io->input_minimum ().get (_io->default_type()); + } else { + return _io->output_minimum ().get (_io->default_type()); } } - -/** Set up the dialogue */ -void -IOSelector::setup () -{ - clear (); - - /* Work out how many rows we have */ - ARDOUR::DataType const t = _io->default_type(); - - int rows; - if (_for_input) { - rows = _io->n_inputs().get(t); - } else { - rows = _io->n_outputs().get(t); - } - - /* Row labels */ - _row_labels_vbox = new Gtk::VBox; - for (int i = 0; i < rows; ++i) { - Gtk::Label* label = new Gtk::Label (_for_input ? _io->input(i)->name() : _io->output(i)->name()); - 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), i)); - b->add (*Gtk::manage (label)); - _row_labels.push_back (b); - _row_labels_vbox->pack_start (*b, false, false); - } - _left_vbox.pack_start (*_row_labels_vbox, false, false); - _left_vbox_pad = new Gtk::Label (""); - _left_vbox.pack_start (*_left_vbox_pad, false, false); - - /* Checkbutton tables */ - int n = 0; - for (PortGroupList::iterator i = _port_group_list.begin(); i != _port_group_list.end(); ++i) { - PortGroupTable* t = new PortGroupTable (*i, _io, _for_input); - - /* 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_widget().modify_bg (Gtk::STATE_NORMAL, alt_bg); - } - - _port_group_tables.push_back (t); - _port_group_hbox.pack_start (t->get_widget(), false, false); - ++n; - } - - show_all (); -} - -void -IOSelector::ports_changed (ARDOUR::IOChange change, void *src) -{ - ENSURE_GUI_THREAD (bind (mem_fun (*this, &IOSelector::ports_changed), change, src)); - - redisplay (); -} - - -void -IOSelector::redisplay () -{ - _port_group_list.refresh (); - setup (); -} - - -/** Handle a button press on a row label */ -bool -IOSelector::row_label_button_pressed (GdkEventButton* e, int r) +std::string +IOSelector::row_name (int r) const { - 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 can_add; - bool can_remove; - std::string name; - ARDOUR::DataType const t = _io->default_type(); - - if (_for_input) { - can_add = _io->input_maximum().get(t) > _io->n_inputs().get(t); - can_remove = _io->input_minimum().get(t) < _io->n_inputs().get(t); - name = _io->input(r)->name(); + if (!_offer_inputs) { + return _io->input(r)->name(); } else { - can_add = _io->output_maximum().get(t) > _io->n_outputs().get(t); - can_remove = _io->output_minimum().get(t) < _io->n_outputs().get(t); - name = _io->output(r)->name(); + return _io->output(r)->name(); } - - items.push_back ( - Gtk::Menu_Helpers::MenuElem (_("Add port"), sigc::mem_fun (*this, &IOSelector::add_port)) - ); - - items.back().set_sensitive (can_add); - - items.push_back ( - Gtk::Menu_Helpers::MenuElem (_("Remove port '") + name + _("'"), sigc::bind (sigc::mem_fun (*this, &IOSelector::remove_port), r)) - ); - - items.back().set_sensitive (can_remove); - - menu->popup (e->button, e->time); - - return true; + } void -IOSelector::add_port () +IOSelector::add_row () { // The IO selector only works for single typed IOs const ARDOUR::DataType t = _io->default_type (); - if (_for_input) { + if (!_offer_inputs) { try { _io->add_input_port ("", this); } - catch (ARDOUR::AudioEngine::PortRegistrationFailure& err) { - Gtk::MessageDialog msg (0, _("There are no more JACK ports available.")); + catch (AudioEngine::PortRegistrationFailure& err) { + MessageDialog msg (_("There are no more JACK ports available.")); msg.run (); } @@ -601,149 +177,86 @@ IOSelector::add_port () _io->add_output_port ("", this); } - catch (ARDOUR::AudioEngine::PortRegistrationFailure& err) { - Gtk::MessageDialog msg (0, _("There are no more JACK ports available.")); + catch (AudioEngine::PortRegistrationFailure& err) { + MessageDialog msg (_("There are no more JACK ports available.")); msg.run (); } } } void -IOSelector::remove_port (int r) +IOSelector::remove_row (int r) { // The IO selector only works for single typed IOs const ARDOUR::DataType t = _io->default_type (); - if (_for_input) { + if (!_offer_inputs) { _io->remove_input_port (_io->input (r), this); } else { _io->remove_output_port (_io->output (r), this); } } - -PortGroupList::PortGroupList (ARDOUR::Session & session, boost::shared_ptr io, bool for_input) - : _session (session), _io (io), _for_input (for_input) +std::string +IOSelector::row_descriptor () const { - refresh (); + return _("port"); } -void -PortGroupList::refresh () +#if 0 +void +IOSelector::set_button_sensitivity () { - 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 routes = _session.get_routes (); - - PortGroup buss ("ardour:"); - PortGroup track ("ardour:"); - - for (ARDOUR::Session::RouteList::const_iterator i = routes->begin(); i != routes->end(); ++i) { + if (for_input) { - PortGroup* g = 0; - if (_io->default_type() == ARDOUR::DataType::AUDIO && dynamic_cast ((*i).get())) { - /* Audio track for an audio IO */ - g = &track; - } else if (_io->default_type() == ARDOUR::DataType::MIDI && dynamic_cast ((*i).get())) { - /* Midi track for a MIDI IO */ - g = &track; - } else if (_io->default_type() == ARDOUR::DataType::AUDIO && dynamic_cast ((*i).get()) == 0) { - /* Non-MIDI track for an Audio IO; must be an audio buss */ - g = &buss; + if (io->input_maximum() < 0 || io->input_maximum() > (int) io->n_inputs()) { + add_port_button.set_sensitive (true); + } else { + add_port_button.set_sensitive (false); } - if (g) { - ARDOUR::PortSet const & p = _for_input ? ((*i)->outputs()) : ((*i)->inputs()); - for (uint32_t j = 0; j < p.num_ports(); ++j) { - g->add (p.port(j)->name ()); - } + } else { - std::sort (g->ports.begin(), g->ports.end()); + if (io->output_maximum() < 0 || io->output_maximum() > (int) io->n_outputs()) { + add_port_button.set_sensitive (true); + } else { + add_port_button.set_sensitive (false); } + } - - /* 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 ( - "", _io->default_type().to_jack_type(), _for_input ? JackPortIsOutput : JackPortIsInput - ); - - PortGroup system ("system:"); - PortGroup other (""); - - 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; + if (for_input) { + if (io->n_inputs() && (io->input_minimum() < 0 || io->input_minimum() < (int) io->n_inputs())) { + remove_port_button.set_sensitive (true); + } else { + remove_port_button.set_sensitive (false); } - } - - push_back (buss); - push_back (track); - push_back (system); - push_back (other); -} - -int -PortGroupList::n_ports () const -{ - int n = 0; - - for (const_iterator i = begin(); i != end(); ++i) { - for (std::vector::const_iterator j = i->ports.begin(); j != i->ports.end(); ++j) { - ++n; + + } else { + if (io->n_outputs() && (io->output_minimum() < 0 || io->output_minimum() < (int) io->n_outputs())) { + remove_port_button.set_sensitive (true); + } else { + remove_port_button.set_sensitive (false); } } - - return n; } +#endif -std::string -PortGroupList::get_port_by_index (int n, bool with_prefix) const +#if 0 +void +IOSelector::name_changed (void* src) { - /* XXX: slightly inefficient algorithm */ - - for (const_iterator i = begin(); i != end(); ++i) { - for (std::vector::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 ""; + ENSURE_GUI_THREAD(bind (mem_fun(*this, &IOSelector::name_changed), src)); + + display_ports (); } - +#endif IOSelectorWindow::IOSelectorWindow ( ARDOUR::Session& session, boost::shared_ptr io, bool for_input, bool can_cancel ) : ArdourDialog ("I/O selector"), - _selector (session, io, for_input), + _selector (session, io, !for_input), ok_button (can_cancel ? _("OK"): _("Close")), cancel_button (_("Cancel")), rescan_button (_("Rescan"))